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OCTOBER 2006 www.amca.org A Supplement to HPAC Engineering Magazine In This Issue: Impact-Resistant Louvers Circulating Fan Velocity Profile Applications Modulating Characteristics of Control Dampers

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OCTOBER 2006

www.amca.orgA Supplement to HPAC Engineering Magazine

In This Issue:Impact-Resistant Louvers

Circulating Fan VelocityProfile Applications

ModulatingCharacteristics ofControl Dampers

AMCA 0610 9/29/06 1:16 PM Page 1

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Many of the seminar concepts will be reinforced through live demonstrations in TCF's accredited air and sound laboratory.

Attendees will receive a certifi cate of course completion that can be applied for Professional Development Hours.

InMotion_1006_draft4a_curve.indd 1 9/1/2006 5:14:44 PM

AMCA 0610 9/29/06 1:17 PM Page 2

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EC-GIANTS are the largest external rotor motor with EC technology and completelyintegrated drive and control electronics on the market! These air movers range in size from500-990 millimeters and use as little as 1/3 the energy of standard AC motors! This state-of-the-art technology generates extremely low acoustiAcal noise from advanced driveelectronics and 3-D backward curved impellers or sickle-shaped axial fans. EC-GIANTS arean excellent choice for rooftop condensers and air handling units. Find out how EC canwork for you, call today!

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AMCA 0610 9/29/06 1:17 PM Page 3

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AMCA 0610 9/29/06 1:18 PM Page 4

October 2006 5

Board of DirectorsLee Buddrus, Chairman of the Board

President, Acme Engineering and Manufacturing Corporation

Emery (Pete) Neitzel, PresidentVice President, Engineering & Manufacturing, Greenheck Fan Corporation

Jo Reinhardt, Vice PresidentPresident, Industrial Louvers, Inc.

Gary Benson, TreasurerPresident, Mechanovent Corporation

Barbara L. Morrison, Executive DirectorAMCA International

Denis Labelle, Director-at-LargeExecutive Vice President, T.A. Morrison

Michael Barry, DirectorPresident, Twin City Fan Companies, Ltd.

Arthur LaPointe, DirectorVice President and General Manager, ConstructionSpecialties Inc.

Robert Van Becelaere, DirectorVice President, Engineering, Ruskin Company

Victor Colwell, DirectorVice President of Sales & Marketing, Loren Cook

C. F. Yang, DirectorManaging Director, Kruger Asia Holding Pte. Ltd.

Michael Almaguer, DirectorVice President, Sales & Marketing, Pottorff

David Nussbaum Chief Executive OfficerPreston L. Vice Chief Financial Officer and

Corporate SecretaryColleen Zelina Senior Vice President, Human

Resources and Organizational EffectivenessEric Shanfelt Vice President, eMedia Strategy

Joseph A. Fristik Group Publisher, MechanicalSystems/Construction Group

Michael Ivanovich Editor in Chief, HPAC EngineeringDave Bosak Art Director Eileen Callahan Sr. Acct. Manager Susan Durishin Media Services Manager

Publishing OfficesThe Penton Media Building1300 E. Ninth StreetCleveland, OH 44114-1503Phone: 216-696-7000Fax: 216-696-3432Website: www.hpac.come-Mail: [email protected]

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President’s MessageWelcome to the inaugural issue of InMotion.By Emery (Pete) Neitzel

AMCA Certified Ratings Program: A Closer LookCertified Ratings Program – A Closer Look

AMCA Member Directory

Impact-Resistant Louvers: Understanding the New Code RequirementsMore research is needed as codes are put into place.By Vickie J. Lovell

Modulating Characteristics of Control DampersDetermining the correct damper design for the system at-hand.By Robert Van Becelaere

AMCA’s Certified Ratings Program (CRP) Supplements the LEED Rating SystemLEED certifies buildings, but only AMCA’s CRP can assure the performance of the air system components that gointo those buildings.By Michael Ivanovich and Emery (Pete) Neitzel

Circulating Fan Velocity Profile ApplicationsVirtual disks incorporating 3D velocity profile data can substantially reduce computation times from days to hours.By Richard Aynsley, PhD

Update on European Directives and StandardsAs the development of standards in the European Regionbooms, more manufacturers are becoming involved in the process.By Ian P. Andrews

Ad Index

F E AT U R E S

TA B L E O F C O N T E N T S

InMotion is published biannually to keepHVAC professionals abreast of rapidlychanging codes, requirements, laws,advancements, and best practices in the air movement and control industry.

INMO T I O N

AMCA 0610 9/29/06 1:18 PM Page 5

6 AMCA International InMotion

As the 2005-2006 president of the Air Movement andControl Association (AMCA) International, Inc., I am pleasedto introduce the inaugural edition of our new magazine,InMotion. InMotion is published specifically for HVAC professionals who design, specify, purchase, install, com-mission, operate, and maintain ventilation systems.

Concerns about the world’s energy supplies, health andsafety, environmental issues, etc., are escalating the rate ofchange in our industry. Legal claims filed against HVAC pro-fessionals are increasing. As such, one of the greatestchallenges facing HVAC professionals is keeping abreast of rapidly changing international, national, state, and localcodes; indoor and outdoor air quality requirements; energyefficiency guidelines or laws; health and life safety regula-tions; seismic and structural requirements; sound andvibration levels; new research and technology; new equip-ment; and the list continues on. InMotion’s articles and casestudies, authored by industry experts, will help keep youabreast of these changes.

Another challenge facing HVAC professionals is selectingproducts that perform as stated in a manufacturer’s litera-ture or computer software. With the information technologyexplosion, manufacturers are able to globally market theirproducts and concepts electronically. As such, it is becom-ing increasingly difficult to assess the accuracy of thisinformation. Unfounded performance claims and poor-per-forming products yield buildings with poor air quality,excessive noise, questionable life safety, and inefficient sys-tems. Therefore, third-party certifications to validate thedata or claims are essential.

AMCA International, Inc., actively promotes standardizedproduct testing and certification procedures throughout theworld. AMCA’s Certified Ratings Program (CRP) assuresproducts are tested and rated in conformance with theappropriate test standards and rating requirements.Products covered include fans, dampers, louvers, acoustic

attenuators, air curtains, airflow measurement stations,and other related air system components for the com-mercial, industrial, and residential markets. AMCA grantsa license to companies to use the Certified Ratings Seal onproducts that pass an initial precertification test and on-going check-tests throughout the life of the certification. Acomprehensive Directory of Certified Products can be foundat www.amca.org.

Additional information regarding AMCA International’sstandards, application publications, membership listing,industry news, meeting minutes, upcoming events, educa-tional seminars, and more can be found at www.amca.orgas well.

In closing, look to InMotion to keep you abreast of indus-try trends and AMCA International’s Certified Ratings Sealsto provide assurance that the products you select will meetyour customers’ requirements. I wish to thank those whocontribute to the magazine’s content and trust the informa-tion will be of value to our readers.

Regards,

Emery (Pete) Neitzel2005-2006 PresidentAMCA International

Vice President of Engineering and Manufacturing,Greenheck Corporation

AMCA International is a not-for-profit association of the world’s manufacturers of related air system equipment. For over 80 years, it has led the way in standards development and application research.

InMotion is published specifically for HVAC professionals

who design, specify, purchase, install, commission,

operate, and maintain ventilation systems.

P R E S I D E N T ’S M E S S A G E

AMCA 0610 9/29/06 1:18 PM Page 6

AMCA 0610 9/29/06 1:19 PM Page 7

One of AMCA International’s most important functions ismanaging its Certified Ratings Program. The purpose of

the Certified Ratings Program (CRP) is to give the buyer,specifier, and end-user of air movement and control equip-ment assurance that published ratings are reliable andaccurate. At the same time, the program assures manufac-turers that competitive ratings are based on standard testmethods and procedures, and are subject to review byAMCA International as an impartial authority.

AMCA’s Certified Ratings Program (CRP) was developedin response to a need for validated, published product per-formance ratings for buyers, specifiers, and users of airmovement and control devices.

The AMCA CRP assures specifiers, contractors, buyers,and building owners that the manufacturer’s product lineshave been tested and rated in conformance with approvedAMCA test standards and rating requirements. Only afterthe product has been tested and the manufacturer’s cata-loged ratings have been submitted to and approved byAMCA International’s staff, can performance seals be dis-played in literature and on equipment. Additionally, eachcertified / licensed product line is subject to continuingcheck-tests every three years in AMCA International’sLaboratory or one of AMCA International’s IndependentAccredited laboratories.

Over the past 50-plus years, AMCA International hasdeveloped standardized test methods to cover the productswithin the AMCA scope. The list of products would includeaxial and centrifugal fans, power roof ventilators, ceilingventilators, evaporative coolers, air circulation fans, jet tun-nel fans, blowers, air curtains, acoustical duct silencers,dampers, energy recovery ventilators, louvers, positivepressure ventilators, propeller fans, agricultural fans, and airflow measurement stations. These standards cover performance relating to airflow measurement accuracy, airdelivery, pressure, psychrometrics, efficiency, power,torque, rpm, thrust, sound power levels, velocity uniformity,outlet velocity, wind-driven rain, water penetration, pressuredrop, air leakage, dynamic closure, and operations.

Product performance is vital to the operation and contin-ued success of the manufacturer. Requiring the AMCA CRPseal gives specifiers, contractors, and building ownersassurance that manufacturers’ performance ratings arecomparable, and their product lines have been tested andrated in conformance with AMCA test standards and pro-gram requirements.

What to Look for when Specifying or Purchasing ProductAMCA Certified: A product line which is AMCA-certified/

licensed to bear the Certified Ratings Seal means that theproduct line has met all of the requirements of the CertifiedRatings Program. This would include signing an agreementwith AMCA, the product line was tested either at an AMCAAccredited lab, an AMCA Independent Laboratory author-ized to perform check and challenge tests, or the AMCAInternational Laboratory located in Arlington Heights, IL,USA. This ensures that all ratings were developed using theprocedures identified in the AMCA Certified RatingsProgram, and the product line will be (or has been) subject-ed to a check-test at no greater than three-year intervals.Additionally, the product line catalog has been checked byAMCA International staff ensuring that the ratings and infor-mation are correct.

AMCA International’s Seal is a Registered Trademark®

in Most Industrialized Countries.Tested in accordance with: Suggests that a manufactur-

er used one of the AMCA standards to perform a test. Itdoes not certify anything about the ratings development orthe qualifications of the laboratory. This is not a certification!AMCA’s standards are readily available to the public, and anyentity could state they have used an AMCA standard to testtheir product(s).

Tested at AMCA: Implies that a product was tested atthe AMCA International Laboratory in Arlington Heights, IL,USA. This is not a certification! Tested at AMCA wouldcarry the same limitations as “tested in accordance with”except that it would certainly mean the laboratory resultsare reliable.

By specifying AMCA International’s Certified RatingsSeal, specifiers, designers, contractors, and building own-ers can be relieved of certain liability problems or legalentanglements frequently encountered in today’s litigiousclimate. You can specify products with confidence byrequesting “Performance ratings shall bear the AMCAInternational Certified Ratings Program Seal”. This simplestatement can greatly assist a specifier in demonstratingthat “due diligence” was exercised in selecting equipmentand that reasonable steps were taken to ensure that per-formance guarantees would be met.

A directory of certified/licensed products listed bymanufacturer name and product type is available atwww.amca.org.

A M C A C E R T I F I E D R AT I N G S P R O G R A M

A Closer Look

8 AMCA International InMotion

AMCA 0610 9/29/06 1:19 PM Page 8

October 2006 9

A M C A M E M B E R D I R E C T O R Y

Members in red participate in AMCA’s CRP

ARGENTINAICM S.A. 54-11-4-447-1699

BRAZILAFC do Brasil Industria www.afcbrasil.com 55-11-4523-1000de Ventiladores LtdaOtam Ventiladores Industriais Ltda. www.otam.com.br 55-51-3349-6363

CANADAAeroflo Inc. www.aeroflo.com (905) 890-6192Alphair Ventilating Systems, Inc. www.alphairfans.com (204) 694-6666Atmosphere Inc. www.atmosphere.com (514) 326-1300Chemposite Inc. www.chemposite.com (604) 946-7688CML Northern Blower Inc. www.northernblower.com (204) 222-4216Daltec Industries Ltd. www.daltecfans.com (519) 837-1921Delhi Industries Inc. www.delhi-industries.com (519) 582-2440E. H. Price Limited www.price-hvac.com (204) 669-4220J.P. Environmental Products, Inc. (519) 821-1199Leader Fan Industries Limited www.leaderfan.com (416) 675-4700M.K. Plastics Corporation www.mkplastics.com (514) 871-9999M.W. McGill & Associates Ltd. (905) 420-0485National HVAC Products Inc. (905) 790-8667Nutech Brands Inc. www.lifebreath.com (519) 457-1904Plasticair Inc. www.plasticair.com (905) 625-9164Reversomatic Heating and www.reversomatic.com (905) 851-6701Mfg. LimitedSheldons Engineering Inc. www.sheldonsengineering.com (905) 564-5072T.A. Morrison & Co., Inc. www.tamco.ca (800) 561-3449TLT-Covent Fans, Inc. www.coventfans.ca (450) 441-3233Universal Fan & Blower Ltd. www.universalfan.com (613) 393-3267Ventex, Inc. www.ventexinc.com (905) 857-4700Ventrol Air Handling Systems Inc. www.ventrol.com (514) 354-7776Western Ventilation Products Ltd. www.westvent.com (403) 250-3348

CHINABeijing Kruger Ventilation Co., Ltd. www.krugerfan.com 86-10-6788-2566Greenheck Kunshan Co., Ltd. www.greenheck.com 86-512-5736-6666Guangdong Deton Company Ltd. www.detonfan.com 86-758-778-7212Guangzhou Kruger www.krugerfan.com 86-20-323-87634M & E Industries, Ltd.Kunshan Everbright Ventilation www.ebfan.com 86-5125-787-3811Equipment Co., Ltd.Nicotra (Tianjin) Fans www.nicotra.com 86-22-879-83207& Blowers Co. Ltd.Shanghai Kruger Ventilation Co., Ltd. www.krugerfan.com 86-21-695-73266Shanghai Nautilus General 86-21-5038-8680Equipment Mfg. Co., Ltd.Wing Hop Electrical Mfg. Co. Ltd. 852-2345-0251Zhejiang Shangfeng Industrial www.shangfeng.org 86-575-2366261Holdings Co., Ltd.Zhejiang Yilida Ventilator Co., Ltd. www.yilida.com 886-576-2655829

DENMARKHowden Denmark A/S www.variax.com 45-5577-6262

EGYPTHammam Industries & Co. www.hammam-eg.com 20-2-833-1930

FRANCEFlakt Solyvent-Ventec www.flaktwoods.com 33-3-8541-7311

GERMANYRuck-Ventilatoren GmbH www.ruck-ventilatoren.de 49-7930-9211-0Witt & Sohn AG www.wittfan.de 49-4101-7007-0

INDIABharat Heavy Electricals Limited www.bhel.com 91-4172-44141C. Doctor India Pvt. Ltd. www.cdoctorindia.com 91-33-2215-7120Industrial Hygienic Systems www.industrialhygienic.com 91-80-2223-8218

INDIAKruger M & E Industries (India) Pvt. Ltd. www.krugerfan.comNadi Airtechnics Private Limited www.nadiindia.com 91-44-255-85360Nicotra India Pvt. Ltd. www.nicotra.com 91-120-258-0553

ITALYCofimco S.R.L. www.cofimco.com 39-032-196-8311Comefri S.p.A. www.comefri.com 39-0432-798811Dynair s.r.l. www.dynair.it 39-030-331-3575Industrie CBI S.p.A. www.industriecbi.it 39-039-73941Nicotra S.p.A. www.nicotra.it 39-035-873111Twin City Nicotra LLC www.nicotra.it 39-035-873111Vortice Elettrosociali S.p.A. www.vortice.it 39-2-90699-241

JAPANMatsushita Ecology Systems Co., Ltd. 81-5688-11735NKG Corporation 81-3-5614-7121

KOREABumyang Air Conditioning Co., Ltd. www.bac.co.kr 82-43-530-9213Dong Yang Air Conditioning Co., Ltd. www.hvacdac.com 82-31-359-8944Flakt Woods Korea www.flaktwoods.com 82-41-589-2001Gumsung Punglyuk Co., Ltd. www.gsfan.co.kr 82-32-811-9500Jin Sung Instrument & Electronic 82-2-948-5432Sam Kwang Air Tech Corporation www.skat.co.kr 82-2-2676-2651Samwon E & B Co., Ltd. www.sebco.co.kr 82-31-499-0721Sangmi Air Tech www.sangmidamper.com 82-32-816-3291Surjin Air Conditioning Company, Ltd. www.vavterminal.com 82-31-983-4596Tae-Il Blower Mfg. Co., Ltd. 82-31-4919001YooHan Engineering Ltd. www.yheng.co.kr 82-2-2107-3355

LEBANONKBE Establishment for www.kbelebanon.com 961-1-898268Air Movement Products

MALAYSIAADF Industries Sdn. Bhd. 60-4643-3636Gebhardt Ventilatoren Pte Ltd. www.gebhardt-singapore.com 60-3-8926-7178Kruvent Industries (M) Sdn. Bhd. www.krugerfan.com 60-3-6188-8293Nicotra Fans & Blowers www.nicotra.com 60-3-896-12588Mfg. (M) Sdn. Bhd.

MEXICOAirequipos, S.A. de C.V. www.airequipos.com 52-55-5541-2405Industriales en Balanceo, SA. CV. 52-55-5718-0003Soler y Palau, S.A. de C.V. www.soler-palau.com 52-222-223-3900Ventas Instalaciones y Servicio, S.A. 52-55-5273-3924

NETHERLANDSBiddle bv www.biddle.nl 31-512-335555

PHILIPPINESFil General Blower Corporation 63-2-361-2659Kruger M & E Industries Corp. www.krugerfan.com 63-2-862-2891 to 97Niagara Industrial Equipment Corp. www.niagarafans.com 63-2-363-7177

SAUDI ARABIAAl-Wahah Desert Cooler Factory www.alwahahcooler.com 966-1-495-1882Arabian Company for 966-1-464-4399Fans Mfg. Ltd.Arabian Thermal Aire Industries Co., Ltd. www.ataico.com 966-3-341-5857Saudi Fan Industries www.refhouse.com 966-3-882-3515

SINGAPOREAirtrade Systems Pte. Ltd. www.airtrade.com.sg 65-6262-1672Azen Mfg. Pte. Ltd. www.azenmanufacturing.com 65-6261-0277Kruger Ventilation Industries Pte Ltd. www.krugerfan.com 65-6861-1577Mecomb Singapore Limited 65-626-19633OLS Mfg. Co. Pte. Ltd. www.connols-air.com 65-686-15253Wishing Star Limited www.wishingstargroup.com 65-6327-1893

AMCA 0610 9/29/06 1:19 PM Page 9

10 AMCA International InMotion

SLOVENIAHidria d.o.o. www.hidria.si 386-1-537-56301

SPAINNicotra España S.A. www.nicotra.com 34-91-884-6110Soler & Palau S.A. www.soler-palau.com 34-93-571-9300Zitron, S.A. www.zitron.com 34-985-168132

SWEDENSystemair AB www.systemair.com 46-222-44000

TAIWANASLI Mechanical Co. Ltd. www.asli.com.tw 886-2-22902211Circle & Cycle Ltd. www.c-cltd.com.tw 886-2-8695-1881Fansys Co., Ltd. www.fansys.com.tw 886-3-322-7966Flowtech Co. Ltd. 886-2-223-28066Golden Flag Ventilation Ind. Co., Ltd. 886-4-2389-8928Horus Air Moving Co., Ltd. 886-2-2341-7281King Machinery Co., Ltd. 886-3-397-2271Kruger Ventilation (Taiwan) Co., Ltd. www.krugerfan.com 886-3-385-9119Lead Fu Industrials Co., Ltd. www.leadfu-kinki.com.tw 886-2-2555-4566Winfan Technology Co., Ltd. www.frpfan.com.tw 886-3-2120031

THAILANDArtith Ventilators Ltd., Part. www.artith.com 66-2-509-3065Kruger Ventilation Industries www.krugerfan.com 66-34-490164-9(Thailand) Co., Ltd.Nicotra Mfg. (Thailand) Co., Ltd. www.nicotra.com 66-2-476-18236Panasonic Ecology Systems www.panasonic.co.jp 66-2-723-3000(Thailand) Co., Ltd.

UNITED ARAB EMIRATESDynair Gulf Fzco www.dynair.it 971-4-880-3153Energy Industrial Corp. of UAE www.energyintl.com (734) 354-2000

UNITED KINGDOMElta Fans Ltd. www.eltafans.com 44-1489-566500Flakt Woods, Ltd. www.flaktwoods.com 44-1206-544122Halifax Fan Ltd. www.halifax-fan.co.uk 44-1484-475123Howden Technology www.howden.com 44-141-885-7300Matthews & Yates and MY Int. www.matthews-yates.co.uk 44-1206-543311Nuaire Ltd. www.nuaire.co.uk 44-29-2085-8287Vent-Axia Ltd. www.vent-axia.com 44-1293-526062

UNITED STATES OF AMERICAA.O. Smith-Electrical Product Co. www.aosmith.com (937) 667-2431Acme Engineering and Mfg. Corp. www.acmefan.com (918) 682-7791Adobeair, Inc. www.adobeair.com (602) 257-0060Aerolator (919) 882-2410Aerosonics, Inc. www.aerosonics.com (573) 796-4151Aerovent, A Twin City Fan Co. www.aerovent.com (763) 551-7500Air Balance www.airbalance.com (859) 538-3400Air Conditioning Products Co. www.acpshutters.com (734) 326-0050Air Flow Co., Inc. (630) 628-1138Air Monitor Corp. www.airmonitor.com (707) 544-2706Air Performance, Inc. www.airperformance.org (334) 588-0070Airline Products Co. www.airlinelouvers.com (800) 547-2635Airmaster Fan Co. www.airmasterfan.com (517) 764-2300Airolite Co. LLC, The www.airolite.com (740) 373-7676All-Lite www.alllite-louvers.com (817) 509-2300Alton www.mestek.com (214) 638-6010American Coolair Corp. www.coolair.com (904) 389-3646American Fan Co. www.flaktwoods.com (513) 874-2400American Warming and Ventilating www.mestek.com (419) 865-5000Architectural Louvers Mfg. www.archlouvers.com (888) 568-8371Arrow United www.mestek.com (570) 746-1888Belco Mfg. Co. Inc. www.belco-mfg.com (254) 933-9000Berner International Corp. www.berner.com (724) 658-3551Big Ass Fan Co. www.bigassfans.com (859) 233-1271Breidert Air Products, www.breidert.com (904) 731-4711Div. of Soler & Palau, Inc.

UNITED STATES OF AMERICABroan-NuTone LLC www.broan-nutone.com (262) 673-4340Captive-Aire Systems, Inc. www.captiveair.com (919) 882-2410Car-Mon Products, Inc. www.car-mon.com (847) 695-9000Carnes Co. Inc. www.carnes.com (608) 845-6411Carolina Blower Div. of www.bruning-federle.com (704) 873-7237Bruning & Federle Mfg. Co.Ceilcote Air Pollution Control www.ceilcoteapc.com (440) 243-0700Central Blower Co. www.centralblower.com (626) 330-3182Cesco Products www.cescoproducts.com (859) 538-3450Champion Cooler Corp. www.championcooler.com (501) 562-1094Chicago Blower Corp. www.chicagoblower.com (630) 858-2600Cincinnati Fan & Ventilator Co. www.cincinnatifan.com (513) 573-0600Clarage, A Twin City Fan Co. www.clarage.com (205) 581-3267Cleanpak International www.cleanpak.com (503) 557-4500Comefri USA Inc. www.comefri.com (270) 881-1444Composite Fan Technology, www.metalcladding.com (716) 434-5513Div. of Metal CladdingConstruction Specialties, Inc. www.c-sgroup.com (800) 631-7379Continental Fan Mfg. Inc. www.continentalfan.com (716) 842-0670Daniel Mechanical Co. www.danielmechanical.com (909) 982-1555DF Fan Services, Inc. www.dffan.com (630) 876-1495Dowco Products Group www.safeair-dowco.com (708) 652-9100Dri-Eaz Products, Inc. www.dri-eaz.com (360) 757-7776Dynaforce www.dynaforce.com (310) 532-1555Dynasonics Systems Inc. www.dynasonics-acoustics.com (817) 509-2300ebm-papst Inc. www.ebmpapst.us (860) 674-1515Ebtron, Inc. www.ebtron.com (800) 232-8766Emerson Ventilation Products www.emersonvent.com (913) 752-6000Energy Labs Inc. www.energylabs.com (619) 671-0100Essick Air Products www.essickair.com (501) 562-1094Euramco Safety Inc. www.ramfan.com (619) 670-9590Fab-Tech Incorporated www.fabtechinc.com (802) 655-8800Fan Am, Inc. www.fanam.com (941) 955-9788Fan Equipment Co., Inc. www.fanequipment.com (702) 270-8344Fantech, Inc. www.fantech.net (941) 309-6000Fiber-Aire, A Twin City Fan Co. www.fiberaire.com (763) 551-7600Flakt Fan Group, Inc. www.flaktwoods.com (269) 683-1150Floaire, Inc. www.floaire.com (919) 882-2410Governair Corp. www.governair.com (405) 525-6546Greenheck Fan Corp. www.greenheck.com (715) 359-6171Harrington Environmental Engineering www.harringtonplastics.com (760) 530-1409Hartzell Fan, Inc. www.hartzellfan.com (937) 773-7411Honeywell International www.honeywell.com (763) 954-6535Howden Buffalo Inc. www.howdenbuffalo.com (803) 713-2200Hunter Fan Co. www.hunterfan.com (901) 248-2212I.A.P., Inc. www.iapfan.com (715) 339-3024Illinois Blower, Inc. www.ibifans.com (847) 639-5500Industrial Air Technology Corp. www.indairtech.com (989) 705-1768Industrial Louvers, Inc. www.industriallouvers.com (763) 972-2981Industrial Plastic Fan www.ipfcolasit.com (800) 891-3656Jenco Fan, Div. of Soler & Palau, Inc. www.breidert.com (904) 731-4711Kanalflakt Inc. www.kanalflakt-us.com (941) 359-3267KCH Services, Inc. www.kchservices.com (828) 245-9836Kinetics Noise Control, Inc. www.kineticsnoise.com (614) 889-0480(Vibron Products Group)King Co. www.mestek.com (214) 638-6010Koger/Air Corp. www.kogerair.com (276) 638-8821L & L Louvers, Division of L & L PS, Inc. www.louver1.com (951) 735-9300L. J. Wing www.ljwing.com (214) 638-6010Lau Industries, Inc. www.laufan.com (937) 476-6500Leader Industries, Inc. www.leaderindustries.com (615) 256-3500Lloyd Industries www.firedamper.com (215) 412-4445Loren Cook Co. www.lorencook.com (417) 869-6474Louvers & Dampers www.louvers-dampers.com (859) 647-2299MacroAir Technologies www.macro-air.com (866) 668-3247

AMCA ME M B E R DI R E C T O RY

AMCA 0610 9/29/06 1:19 PM Page 10

October 2006 11

UNITED STATES OF AMERICAMarley Engineered Products www.leadingedge.com (800) 452-4179Mars Sales Co., Inc. www.marsair.com (310) 532-1555Mechanovent Corp. www.mechanovent.com (219) 326-1767Mestek, Inc. www.mestek.com (413) 568-9571Metal Form Mfg. Co., Inc. www.mfmca.com (602) 233-1211Met-Pro Corp., Duall Division www.dualldiv.com (989) 725-8184Moffitt Corp., Inc. www.moffitthvac.com (904) 241-9944Munters Corp. www.munters.us (210) 651-5018Nailor Industries Inc. www.nailor.com (281) 590-1172NCA Mfg., Inc. www.ncamfg.com (972) 276-5002New York Blower Co., The www.nyb.com (630) 794-5700North East Louvers, Inc. (717) 436-5300Paragon Controls, Inc. www.paragoncontrols.com (707) 579-1424Peerless Electric/Madison Mfg. Co. www.peerlessblowers.com (828) 622-7500PennBarry www.pennvent.com (972) 680-9126Perfect Air Control, Inc. www.prefco-hvac.com (727) 441-2651Phelps Fan Inc. www.phelpsfan.com (501) 568-5550Phoenix Mfg., Inc. www.evapcool.com (602) 437-1034Plymovent Corp. www.plymovent.com (609) 395-3500Pottorff www.pottorff.com (817) 509-2300Powered Aire, Inc. www.poweredaire.com (724) 588-3305Quietaire Corp. www.quietaire.com (713) 228-9421Rapid Fan and Blower Inc. www.rapidfan.com (718) 786-2080Reliable Products www.reliablelouvers.com (800) 624-3914Robinson Industries, Inc. www.robinsonfans.com (724) 452-6121Rupp Air Management Systems www.ruppams.com (919) 882-2410Ruskin Co. www.ruskin.com (816) 761-7476Safe-Air of Illinois, Inc. www.safeair-dowco.com (708) 652-9100Soler & Palau USA www.solerpalau-usa.com (904) 731-4711StratoVent (919) 882-2410Strobic Air Corp. www.strobicair.com (215) 723-4700SunAir (919) 882-2410Super Vacuum Mfg. Co., Inc. www.Supervac.com (970) 667-5146Supreme Fan Products (972) 680-9126Swartwout Division www.swartwout.com (816) 761-7476TC Axial, A Twin City Fan Co. www.tcaxial.com (763) 551-7600TC Ventco, A Twin City Fan Co. www.tcventco.com (763) 551-7600Tempest Technology Corp. www.Tempest-Edge.com (559) 277-7577Temtrol, Inc. www.temtrol.com (405) 263-7286Thermotek www.thermotek.com (919) 882-2410TLT-Babcock, Inc. www.tltbabcock.com (330) 867-8540Tomkins Industries, Inc. www.tomkins.co.uk (816) 761-7476Trane Co., The www.trane.com (859) 259-2500Twin City Fan Companies, Ltd. www.tcf.com (763) 551-7600U.S. Fan International www.acmefan.com (918) 682-7791Ultratech Industries, Inc. www.hamlincos.com (919) 779-2004United Enertech Corp. www.unitedenertech.com (423) 698-7715United Metal Products www.unitedmetal.com (480) 968-9550Vanaire www.vanaire.com (502) 491-3553Venco Products www.greenheck.com (715) 359-6171Vent Products Co., Inc. www.ventproducts.com (773) 521-1900Viron International www.vironintl.com (989) 723-8255Vostermans Ventilation, Inc. www.multifanusa.com (309) 827-9798Ward Industries www.wardind.com (630) 595-7320Windy City Mfg. www.windycitymanufacturing.com (773) 622-1728Wonder Metals Corp. www.wondermetals.com (800) 366-5877York International E.S.G. www.york.com (503) 946-4514

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AMCA 0610 9/29/06 1:20 PM Page 11

12 AMCA International InMotion

for many decades, there was a surprisingly small amount ofreliable information available prior to 1993 on how to designand construct smaller buildings not designed to ASCE 7.During the post-Andrew decade, the consensus of theexperts was that building performance of smaller buildings,simply put, could be improved by protecting the exteriorbuilding envelope.

After 1992, the insurance industry, builders, manufactur-ers, and others invested millions of research dollars intowind research, collecting post-hurricane field data anddeveloping computer modeling, trying to better understandhow buildings perform in high-wind events. A great dealwas spent to study the generation and patterns of wind-borne debris. “Impact resistance” test methods andspecifications were developed to investigate the perform-ance of windows, doors, shutters, and skylights duringimpact and cyclic loading in the laboratory.

However, to the knowledge of this author, there has beenlittle to no independent research that conclusively assesses:• The risk to a building in the event of internal pressuriza-

tion of the ventilation system during a high-wind event• Whether or not impact-resistant louvers have any positive

effects on protecting the structure• The variables that would affect the extent of the damage

from windborne debris (if any) such as building height,size of the ventilation opening, wind speed, missile size,speed, trajectory, etc.In spite of the obvious research deficiencies pertaining to

ventilation systems, Section 1609.1.2.1 of the 2006 editionof the International Building Code (2006 IBC) has a newrequirement for the impact testing of louvers that cover theopenings for intake and exhaust ducts in the coastal areasin hurricane-prone regions.

I M P A C T- R E S I S TA N T L O U V E R S :

Understanding the New Code

By Vickie J. Lovell

While the new requirements for the 2006

International Building Code are in place, more

research needs to be undertaken.

In less than a four-week period in 1992, two major hurri-canes hit the United States, leaving an unprecedented arrayof devastation. First, Hurricane Andrew pounded Florida andLouisiana to become the most expensive natural disaster in U.S. history, with damage estimates approaching $30 billion. Three weeks later, Hurricane Iniki affected threeHawaiian Islands, resulting in over $1 billion in damage.

Prior to that year, the only hurricane of equivalent magni-tude to hit a modern, populated area was Cyclone Tracey,which slammed into the suburban Australian city of Darwinin 1974. Fewer than 5% of the homes in Darwin remainedsufficiently undamaged so as to be continuously habitable.The losses were attributed exclusively to poor building performance in extremely high winds. The Australian gov-ernment immediately began to develop criteria for newconstruction methods in residential construction, leadingthe international community in the study of building per-formance in high-wind events.

The devastation from Hurricane Andrew exposed similardangerous shortcomings in construction methodology andinspections in U.S. coastal regions, particularly the vulnera-ble East Coast. Due to the public outcry, the U.S. expertslooked to the Australian experience and the lessons learnedthere as guidelines to hastily develop new U.S. testing andbuilding code requirements.

Today’s new U.S. building code requirements and theresulting standards pertaining to impact resistance to wind-borne debris are largely based on the Australian losses ofsmall buildings and family dwellings. Larger, commercialbuildings are usually designed to ASCE 7, Minimum DesignLoads for Buildings and Other Structures.

Although structural engineers have been aware of theeffects of wind loads on larger buildings in tropical regions

AMCA 0610 9/29/06 1:20 PM Page 12

The code requirement is based onthe logical presumption by the majorityof the participating voting members ofthe International Code Council (ICC)that when a louver in an exterior wall iseither damaged or eliminated by wind-borne debris during a high-wind event,the air leakage-rated damper inside theventilation duct may be exposed todamage, which could lead to interiorpressurization of the building.

Prior to approval of this codechange, several jurisdictions in hurri-cane-prone regions were arbitrarilyrequiring testing to the Dade County(South Florida) Standard PAS 203 orPAS 201, or the large-missile impacttest only of ASTM E 1996,Specification for Performance ofExterior Windows, Glazed CurtainWall, Doors and Storm Shutters, toevaluate the impact resistance of louvers. For the reasons previously

stated, the requirements for testingand the enforcement for such require-ments were inconsistent and werelargely based on anecdotal evidenceor speculation that louvers should beimpact-resistant.

Based on that widely held view, thecode now requires impact-resistantlouvers in the windborne debrisregions of hurricane-prone areas (for adefinition of these areas, see theaccompanying sidebar).

A Closer Look at the CodeWhen reviewing the specific code

text, it should be noted that IBCSection 1609.1.2.1 falls under the larger section, 1609.1.2, Protection ofOpenings, which deals primarily withthe protection of glazed (glass) open-ings in windborne debris regions. Thissection of the code deals exclusivelywith the protection of glazed

Requirements

• Hurricane-prone regions of thecountry as areas vulnerable tohurricanes on the United StatesAtlantic Ocean and Gulf ofMexico coasts where the basicwind speed is greater than 90mph (40 m/s), and Hawaii,Puerto Rico, Guam, the VirginIslands, and American Samoa.

• Windborne debris regions as theportions of hurricane-proneregions that are within 1 mile(1.61 km) of the coastal meanhigh-water line where the basicwind speed is 110 mph (48 m/s)

HURRICANE-PRONE AND WINDBORNE DEBRIS REGIONS DEFINEDThe 2006 IBC defines:

or greater; or portions of hurri-cane-prone regions where thebasic wind speed is 120 mph (53m/s) or greater, and all of Hawaii.The local Authority HavingJurisdiction (AHJ) along allcoastal areas should be consult-ed to determine exactly wherethe requirements for impact-resistant louvers are going to beenforced. For a wind speed mapdepicting the geographic applica-bility along the U.S. east coastline,consult Chapter 16 of the IBC(Figure 1609).

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AMCA 0610 9/29/06 1:20 PM Page 13

14 AMCA International InMotion

assemblies; its technical undertonesare based on the Australian experi-ence with smaller buildings, as well asthe present U.S. hurricane strategy ofprotecting the building envelope.

Due to the formatting of this codesection and the location of the louverrequirement within the glazing require-ments, it is likely that some codeenforcement or design professionalswill mistakenly interpret the require-ment to mean that the requirementsfor the impact testing of glazing andshutters, including the cycling loadingportion of the test, should be appliedeven-handedly to louvers. However,that is incorrect.

The scope of ASTM E 1996 coversimpact testing of exterior building fea-tures such as windows, glazed curtainwalls, doors, and storm shutters inbuildings located in geographic regionsthat are prone to hurricanes, simulatingimpact by both large and small missiles. For glazed openings and non-porous shutters that protect thefenestration assembly, the impact test-ing is followed by a cyclic loading test.There is no specific provision in thetest standard for testing louvers thatcover ventilation openings – either forimpact or cyclic loading.

In consultation with laboratoriesthat do such testing, as well as someof the members of the ASTM com-mittee who developed the testmethod and the specification forimpact protection, it was acknowl-edged that the “large missile” impacttest part of the standard could beused to evaluate the impact resist-ance of louvers in the absence of astandard or specific language within

the existing standard that applies to louvers.

The intent of this code change wasnot to require that louvers comply withASTM E 1996 in its entirety; only thelarge missile impact test excluding thecyclic loading, or testing to anapproved impact standard that may bedeveloped in the future that pertainsspecifically to louvers.

As with most engineering questions,some judgment by the test sponsorand the laboratory engineers is neces-sary to set the correct criteria fortesting and evaluation, and such deci-sions must be documented in the testreport for consideration by the AHJ.

Clearly, the effect of hurricanes on building ventilation systems is asubject that begs further exploration.Since climatologists are predicting aperiod of increased hurricane activityfor the next decade or two, it is imper-ative that such investigation continues.Time is of the essence. As for thefuture of research on the vulnerabilityof ventilation systems and the creationof a louver impact standard thatreflects those conditions, that chargewill likely fall to members of the AirMovement and Control Association todevelop a standard and further refinethe code requirements that are applica-ble specifically to louvers.

References2006 International Building Code, International CodeCouncil, 4051 Flossmoor Rd., County Club Hills, IL60478 (www.iccsafe.org).

Vickie J. Lovell is president of InterCode Inc., DelrayBeach, FL. She can be reached at 561/278-0922 [email protected].

IM PA C T-RE S I S TA N T LO U V E R S: UN D E R S TA N D I N G T H E NE W CO D E RE Q U I R E M E N T S

AMCA 0610 9/29/06 1:20 PM Page 14

AMCA 0610 9/29/06 1:20 PM Page 15

16 AMCA International InMotion

Has it changed today? The answer is no for built-up units;but for factory-built units, the design has gone to 1,000 fpmFace Velocity for the small dampers, and up to 1,500 fpmFace Velocity for larger units.

As with any “rule,” there are always exceptions (e.g.,economizers used for 3- to 20-ton rooftop units). These mayhave extreme velocities on the fresh air dampers when theyare in the full economizer mode.

Damper ConsiderationsHow do you determine which damper design is right foryou? Let’s take a look at three important considerations.They are:• Outside air dampers need to be tested and certified to

AMCA Publication 511 Class IA to meet IECC CodeRequirements.

• Care should be taken when specifying opposed bladedampers for economizer operation due to the potential ofa drastic pressure increase when both dampers are atmid-stroke.

• Air measuring stations should be AMCA-Certified toAMCA Publication 611.Before we begin, it’s important to understand the two

governing code requirements—ASHRAE 90.1 and IECCCode Requirements—for outside air dampers. The U.S.Department of Energy (DOE) has mandated that all stateshave an energy code that is equal to, or better than,ASHRAE 90.1, which states that, for most parts of the country, the leakage rate on dampers must be no more than10 cfm/sq. ft. at 1 in. of static pressure. In warm climates,such as Florida, or very cold climates, such as Minnesota,the damper leakage must be less than 4 cfm/sq. ft. at 1 in.of static pressure.

The IECC is more stringent, and states that the damper leak-age shall be no more than 3 cfm/sq. ft. at 1 in. of static pressure.

So far, 42 states have adopted the requirements of the IECC.So, to play it safe, it would be best to design your system sothe dampers have a leakage rate of no more than 3 cfm/sq. ft.The most accurate method to determine outside airflow into asystem is to measure its rating at the fresh air damper.

AMCA International, which operates a Certified RatingsProgram for dampers and louvers, has established AMCAStandard 511, which includes a leakage classification ofClass IA to meet the IECC Requirements of 3 cfm/ sq. ft. ofleakage. AMCA Standard 511 also requires manufacturersto have their products tested every three years to verify thatthe damper still meets the leakage requirements.

In addition to leakage, consideration needs to be given todamper pressure drop. Figure 1 shows dampers in variouspositions on an AHU. The pressure drop of the dampers ineach one of the configurations is as follows:

As you can see in Figure 1, the pressure drop varies dra-matically depending on the application and the testingrequirements to have a run of straight duct before or afterthe damper. The worst case is the AMCA Fig. 5.5. If you takethe damper out of the system and test the hole in the AHU,it would have a pressure drop of .08 in. This would make thepressure drop of the damper only .12 in. at 1,000 fpm.

MODULATING CHARACTERISTICS OF CONTROL DAMPERS

Determining the Correct Damper

By Robert Van Becelaere

With the wide variety of dampers that can be used in the design of air-handling units

(AHUs), determining which is right for your application can be a daunting task, but it

doesn’t have to be. Here’s a simple rule of thumb I began using 40 years ago: 1,000 fpm Face

Velocity, unless it was used behind a coil or louver, and then it was 500 fpm for that unit.

Static

AMCA Pressure Drop

Figure at 1,000 fpm Description

5.3 .018Duct on both sides,

7 diameter upstream, 10 diameter downstream

5.2 .04 Duct on upstream only, 7 diameter upstream

5.5 .20 No duct upstreamor downstream

AMCA 0610 9/29/06 1:21 PM Page 16

Design

Another factor that can influenceleakage and pressure drop is the typeof damper used. There are two basictypes of dampers used in AHUs: airfoil and Triple V design.

The losses of speeding up the airflow through the damper and discharging it into a plenum (e.g.,AMCA Fig. 5.5) are so high that thesavings for air foil blades on pressuredrop is not a factor. However, in AMCAFig. 5.3, with duct both upstream anddownstream, the air foil blades willhave 30%-50% less pressure drop inthe application. In addition to less pres-sure drop, air foil blades also generateless noise and have stronger bladesversus Triple V groove blades.

Blade Linkage DesignIf you’re concerned about uniform

airflow, another factor to consider isthe blade linkage design. The twomost common designs are opposedblades and parallel blades (see Figure 2).

Current data on modulating charac-teristics of dampers can be found inASHRAE Research Report RP 11571.This is the first documented work ondampers since the early 1940s, and it shows how dampers modulate indifferent duct configurations.

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October 2006 17

AMCA 0610 9/29/06 2:55 PM Page 17

18 AMCA International InMotion

Another study conducted forASHRAE, GPC 16P2, shows the linearcharacteristics of modulating fresh airand return air dampers. Based on theresults of these tests, it appears asthough parallel-blade dampers give amore uniform flow when modulatedtogether. Opposed-blade dampersstarved the system at mid-stroke. Thehigher the velocity of airflow, the morenon-linear the curves become.

Fortunately, there are controls thatwill help linearize the damper based onits characteristic curve in the installedapplication. To assure uniform airflowin opposed-blade applications, thesecontrols should definitely be used.

Controls will also benefit parallel-bladeapplications where the pressure dropof the return air path is different thanthat of the fresh air path.

A Proper Balance is EssentialOne of the biggest challenges

facing design engineers today is main-taining the correct outside airflow tomeet the requirements of ASHRAE62. A proper balance is essential if youwant to avoid over ventilating a space,something that can add expense tobuilding operations. There is an AMCAStandard 600 that covers testing of air measuring stations. There is also a Certified Rating Program AMCA

MO D U L AT I N G CH A R A C T E R I S T I C S O F CO N T R O L DA M P E R S

Delhi Industries SETTING STANDARDS FOR THE FAN INDUSTRY DELAIR The easiest to use fan selection software

¶ Make selections & comparisons between product types ¶ Produce submittal documents & drawings ¶ Make drive selections

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¶ Check Stock, ¶ Check Order Status, ¶ Obtain Tracking numbers, ¶ Obtain Invoices including freight

VISIT WWW.DELHI-INDUSTRIES.COM

Publication 611 for those products thathave a check-testing program to verifythat air measuring stations meetdesign specifications.

To be certain you are getting theaccuracy you need, be sure to specifyAMCA Publication 611.

ReferencesASHRAE RP 1157, Flow Resistance and ModulatingCharacteristics of Control Dampers. Van Becelaere, R.;Saver Jr., H.J.; and Finaish, F.

ASHRAE GPC 16P, Mixing Damper Testing Report, VanBecelaere, R.

Robert Van Becelaere is vice president of engi-neering at Ruskin, Grandview, MO. He can bereached at 816/761-7476 or [email protected].

AMCA 0610 9/29/06 2:04 PM Page 18

October 2006 19

By Michael Ivanovich and Emery (Pete) Neitzel

LEED certifies buildings, but what about the

mechanical products that go into green buildings?

When architects, engineers, and contractors began todesign and build green buildings, there were no “green”products. As such, they worked with what was available, andthe emphasis was on energy or water efficiency; emissionsreduction; minimizing waste; and maximizing local resources.

Things are different now. The U.S. Green Building Council’s(USGBC) Leadership in Energy and Environmental Design(LEED) rating system for buildings has put more pressure onmanufacturers to produce green products. For markets suchas interior finishes and furnishings, the green-product marketis well advanced. However, for mechanical-system products,the green-product market is in its infancy.

According to the latest data available, in 2004, the greenbuilding market was estimated to be around $3.3 billion, or2% of the $165 billion new-construction market. By 2010,the green building market is projected to grow to between$10.2 billion and $20.5 billion.

So what’s an engineer to do? This article examines someof the issues associated with green building design andproduct selection. Toward the end of the article, it makesrecommendations for selecting air movement and controlproducts that will assure specified performance.

The Grassroots of Green BuildingsThe green building market began to form as a cohesive

entity in the late 1980s when indoor air quality (IAQ), energy efficiency, renewable energy, materials use/re-use,water conservation, and moisture control began to be treat-ed in an integrated fashion. Air-system design, specification,installation, operations, and maintenance were critical com-ponents of green buildings from the beginning.

Then, in the early ‘90s, the USGBC emerged when a teamof farsighted, market-savvy individuals saw the economicpotential for green buildings, and formed a dues-payingalliance. In relatively short order, the USGBC became thevanguard of the green buildings movement and, with thedevelopment of LEED, ultimately launched the green build-ing market into mainstream America.

LEED, as a rating system, is comprised of prerequisitesfor site, energy, and indoor and outdoor air and water quali-ty. After prerequisites are met, additional points are earnedby voluntarily investing in optional measures specified in

each LEED section. Documentation is submitted to third-party contractors, who determine if the building meetsLEED threshold levels for Certified, Silver, Gold, or Platinumcertification. The certification level is emblazoned on aplaque and installed on or within the building.

LEEDing IndicatorsThe growth of the LEED rating system mirrors the growth

of the green building market. USGBC’s LEED for new con-struction rating system (LEED NC) was launched in 2000. Atthat time, 13 projects achieved certification. Approximatelyfive years later, 337 buildings worldwide achieved certifica-tion. During that time, additional rating systems werelaunched for existing buildings, commercial interiors, andcore-and-shell spec buildings.

The popularity of the program is growing; a LEED-certified building exists in every state, and manyfederal agencies, states, and cities have adopted LEEDNC as a requirement for their government buildings. Whilemany professionals have mixed feelings about LEED, thereis no question that LEED helped establish a common ver-nacular for talking about green buildings. With more than23,000 LEED-accredited professionals today, the number ofengineers, architects, consultants, and product representa-tives who talk “green building language” is growing.

Given the media attention afforded the USGBC andLEED, the number of certified green buildings represents avery small fraction of America’s real estate portfolio.However, many construction projects use the freely avail-able LEED guidelines, associated guidebooks, and expertiseto achieve a green building, even though LEED certificationis not pursued. While the traceability of these buildings islost, their contributions toward a greener real estate portfo-lio cannot be ignored. As energy costs increase and peopledemand healthier buildings, the number of buildings con-structed to LEED parameters will continue to grow.

Green is as Green DoesA green LEED building must be designed and constructed

to operate at LEED performance levels, be adaptive to changing occupancies, and, ultimately, take into accountdeconstruction and recycling. Achieving and maintainingLEED performance levels are shared responsibilities of theengineering community from both design and operations per-spectives. Energy consumption, power generation, IAQ,

AMCA’S CERTIF IED RATINGS PROGRAM SUPPLEMENTS

The LEED Rating System

AMCA 0610 9/29/06 2:04 PM Page 19

20 AMCA International InMotion

AMCA’S CE RT I F I E D RAT I N G S PR O G R A M SU P P L E M E N T S T H E LEED RAT I N G SY S T E M

acoustical quality, water consumption,psychrometric “comfort,” and emis-sions are all measurable performanceresponsibilities that mechanical andplumbing engineers must assume.These responsibilities are carried forthwhen deciding upon system design(e.g., centralized vs. decentralized airconditioning), right-sizing prime-movingand ancillary equipment, specifyingcontrols and control sequences, andoverseeing designs through installation,commissioning, and early occupancy.

When operations personnel takeover a green building, they must operate

the building according to its designintent and perform regular mainte-nance and service in accordance withLEED principles. For example, theymust maintain high levels of energyefficiency and low levels of emissions,and ensure that water conservationefforts are taking place. For these reasons, field commissioning got asubstantial boost when LEED requiredminimal levels of commissioning as aprerequisite and gave additional pointsfor higher levels of commissioning.One of the tenets of LEED certificationis that operating staff be empowered

with documentation and training toensure that a building can be operatedand maintained in accordance withdesign intent.

What’s a Green HVAC Product?As mentioned earlier, LEED is a rating

system for buildings – not the construc-tion, electrical, or mechanical productsthat go into them. Bob Zimmerman saidit well in his article, “Certified Green?”,published in the July 2005 issue ofBuilding Operating Management:

Green product certifications andlabels complement the USGBC’s

EQUIPMENT COVEREDAMCA International is a not-for-profit association

dedicated to the certification of performance ratings onair system components for industrial, commercial, andresidential markets.

The different types of equipment covered by theAMCA Certified Ratings Program (CRP) include:• Acoustical Duct Silencers• Air Curtain Units• Airflow Measurement Stations• Blowers• Circulating Fans• Dampers• Evaporative Coolers• Fans• Louvers• Positive Pressure Ventilators• Shutters

Air system components can have their performance rat-ings certified for one or more criteria that are appropriatefor the equipment, including: • Air Leakage• Air Leakage – Air Performance• Air Performance• Air Performance – Wind-Driven Rain• Airflow Measurement Station – Air Performance• CFM/Watt – Air Performance• Positive Pressure Ventilators – Air Performance• Prefabricated Silencer – Sound and Air Performance• Sound and Air Performance• Water Penetration and Air Performance• Water Penetration – Air Performance – Wind-Driven Rain• Wind-Driven Rain

For more information, go to www.amca.org.

AMCA 0610 9/29/06 2:04 PM Page 20

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LEED rating system as tools for facilitating a market shift to more envi-ronmentally responsible buildings.While LEED looks at whole-buildinggreen design, the green product certi-fications and labels look at the specificcharacteristics of the individual prod-ucts. LEED is the most recognizablerating system for whole-building greendesign, whereas each green certifica-tion or label has its own criteria.

Product-certifying organizationsinclude Green Seal (www.greenseal.org),the U.S. EPA’s Energy Star program(www.energystar.gov), and GreenGuard (www.greenguard.com). GreenSeal is for cleaning supplies; GreenGuard covers low-emitting interiorproducts; and Energy Star, while helpfulfor many electronics and appliances,does not go beyond small-commercialair conditioners or mechanical equip-ment. For identifying green productssuch as large fans for commercial building projects, none of these organi-zations provide significant help.

There are green-product informationsources and databases that providebuyers of mechanical products guid-ance on selecting and specifyingproducts for green buildings. Some ofthese are “pay to play” databases,whereby entry into the database isavailable to those companies that payto list their products.

Of these, Greenspec (www.green-spec.com), a pay-for-access service,offers a wide variety of products forthe HVAC community and has a strongrelationship with the USGBC. Thepresentation of Greenspec’s annual“Top 10 Green Building Products”awards is a popular event at the annu-al Greenbuild conference hosted bythe USGBC. However, Greenspec islimited. It does not currently have any

listings for commercial or industrial-scale air-handling fans.

Until there is a green-product data-base for HVAC products with sufficientbreadth to fulfill the full gamut ofequipment that goes into non-residentialbuildings, the mechanical communitywill have to make do. Along theselines, guidance is provided by DavidSellers, P.E., in his article, “HVAC and Plumbing Products for GreenBuildings,” in HPAC Engineering’sMay 2004 issue:

With some facilities, such as hospi-tals, schools, and high rises, internalfunctions may change, but the shell andfundamental structure remain the samethrough many renovation cycles. Takingthis into consideration when selectingand installing fundamental machineryfor HVAC and plumbing systems canopen the door to several life-cycle-enhancing opportunities, including:• Selecting fans and air-handling units

at low face velocities. • Conservatively sizing pipe and duct

mains from a pressure-drop stand-point.

• Configuring distribution pumps foroptimized performance at multipleoperating points.

• Utilizing high-quality equipment toensure precise, reliable perform-ance and longevity.

• Providing for service and mainte-nance needs. Some of these measures will save

energy in the near term and provideflexibility over the long term. Others willguarantee that an investment (financesand resources) in machinery will paydividends over time. If the implementa-tion of these measures is properlyplanned and executed, any first-costpenalties will pale in comparison withthe life-cycle savings achieved.

October 2006 21

AMCA 0610 9/29/06 2:04 PM Page 21

22 AMCA International InMotion

That said, it’s critical for the equip-ment, ultimately procured, to performin accordance with expectations thatare set when the equipment wasselected. If the product has not beenindependently certified to perform asrated, how can anyone be assured thatit will perform as expected? Sellers’point about utilizing high-quality equip-ment to ensure precise, reliableperformance can be met by specifyingAMCA-licensed products.

AMCA International’s CertifiedRatings Program

Currently, AMCA International hasthe world’s only international Certified

Ratings Program (CRP) for air systemcomponents. This program ensuresthat a product line has been tested andrated in conformance with AMCAInternational’s test standards and rating requirements. The purpose is togive the buyers, specifiers, and usersof air movement and control equip-ment assurance that published ratingsare reliable and accurate.

Participation in AMCA International’sCRP is voluntary and open to AMCA members and non-members.Manufacturers submit units for testingat an AMCA independent laboratory.Trained laboratory technicians conducttests in accordance with AMCA or rec-

ognized test standards, many of whichare International Standards. Once testrequirements are met, manufacturers’published ratings are verified for accu-racy. Catalogs containing the approvedratings are reviewed and approved byAMCA’s engineering staff before 1) theratings are published, 2) the CertifiedRating Seal can be used, and 3) the catalogs are distributed to the public.

Ratings are subject, at all times, toreview by AMCA International as animpartial authority. AMCA-licensedproducts are revisited (check-tested)every three years to ensure that manu-facturers maintain the tolerancesnecessary to achieve published ratings

AMCA’S CE RT I F I E D RAT I N G S PR O G R A M SU P P L E M E N T S T H E LEED RAT I N G SY S T E M

AMCA 0610 9/29/06 2:05 PM Page 22

October 2006 23

over time. All licensed products areopen to challenge testing, allowingcompeting manufacturers or any thirdparty to question or verify a product’sperformance. Failure to pass a checktest requires immediate correctiveaction to be taken within a specifiedtime. Inability to meet original perform-ance requires restatement of publishedperformance or loss of certification.

AMCA International maintains anup-to-date listing of licensed productsat www.amca.org. Additionally, thewebsite contains a rich database ofinformation on system design andproduct application for commercial,industrial, and agricultural buildings.

Specifying products that bear theAMCA Certified Rating Seal is a credible way to ensure accurate anddependable equipment that performsto published ratings as required bygreen building designers.

ConclusionThe green building market is grow-

ing and as such, so is the need forgreen products that go into them.Currently, no green-product databaseor certification organization exists thatcan meet the needs for many, if notmost, of the mechanical-system prod-ucts going into these green buildings.For air-system components, such as

fans, louvers, and dampers, AMCA’sCertified Ratings Program (CRP) pro-vides a database of third-party-testedproducts and independently reviewedrating documentation that designersand specifiers can use to at least pro-vide reasonably assured performance.

Michael Ivanovich is the editor-in-chief ofHeating/Piping/Air Conditioning (HPAC) Engineering,and manager of events of the Engineering GreenBuildings Conference and Expo. He can be reached [email protected].

Emery (Pete) Neitzel is the vice president of engineeringand manufacturing at Greenheck Corp., and the 2005-2006 preesident of AMCA International. He can bereached at [email protected].

AMCA 0610 9/29/06 2:05 PM Page 23

24 AMCA International InMotion

By Richard Aynsley, PhD

The introduction of a virtual disk incorporating

measured 3D velocity profile data can substantially

reduce computation times from days to hours.

There has been widespread application of computationalfluid dynamics (CFD) in research and development of fans inrecent years. This activity is typically in 3D, although someinitial development work is done in 2D to reduce computa-tion run times.

In studies of airflow in large spaces from large, industrialcirculator fans, the run times for 3D computations can beseveral days on a high-end, dual-processor PC. This can bereduced dramatically without loss of accuracy by substitut-ing a 3D velocity profile measured close to the fan blades.Data from this velocity profile can be used to create a virtu-al disk in the CFD model. This virtual disk replaces the full3D CFD modeling of the fan blades, which represents themajority of computation time.

It is important to measure 3D velocity profiles for thistechnique so that all three X, Y, and Z components of velocity are obtained. This will ensure that important swirlcharacteristics of the airflow from the fan are included inthe modeling. These velocity profile measurements aretypically measured at a distance of about three blade chordwidths downstream from a fan. Measurements in that loca-tion avoid the complex flow adjacent to the blades but areclose enough to the blades to minimize the influences ofentrainment into the jet and the geometry, and obstruc-tions in large spaces.

Velocity profiles can also be used to establish airflow rateassociated with the principal jet from circulator fans. This isdiscussed later in this article.

Airflow in a Distribution CenterInitial attempts to model airflow using CFDesign software

for 3D CFD of air flow analysis from 24-ft./diam. industrialceiling fans were unsuccessful, crashing after four days.

The total domain around the fan was 90-ft./diam. and 20-ft.deep, with the fan 6-ft. below the ceiling. A secondary, transitional domain 15-ft./diam. and 1.5-ft. deep was used tospeed convergence, with the local domain around the fanset at 25.5-ft./diam. and 8-in. deep.

We found that a single-blade passage would not work foran approximation. On a smaller, 8-ft./diam. fan, we neededat least 700 iterations, equivalent to 38 revolutions of the 10fan blades, to establish a stable flow pattern.

The largest 10-blade fan successfully modeled in 3D CFDwas a single fan, which was 8-ft. in diameter (see Figure 1).Run times for this airflow simulation, using 514,947 nodeswith 700 iterations, were more than four days on a fully con-figured Dell Precision computer with dual Intel Xeon 3.00GHz processors.

By adopting a virtual disk approach, based on measured3D velocity profile data, airflow from three, 14-ft./diam. fansat full speed (71 rpm) in a distribution center was suc-cessfully modeled (see Figure 2). Run times for thisconfiguration, with 81,642 nodes and 1,000 iterations, werereduced to about eight hours. Note that it is essential to cal-ibrate CFD input data to ensure that CFD output correlatesadequately with physical measurements of airflow.

In Figure 2, the highest velocity is at the floor and not atthe fan. The static pressure below the fan, between theracks, is increased by the fan. While the main flow is downthe aisle away from the fan (not shown in this view), thissection shows air escaping at high velocity through the nar-row space under the rack.

C I R C U L AT I N G F A N V E L O C I T Y

Profile Applications

Figure 1. CFD model of airflow envelope for an 8-ft./diam. ceiling fan.

AMCA 0610 9/29/06 2:05 PM Page 24

October 2006 25

Airflow Rate from Circulating FansUnlike ducted fans, airflow rate from

unducted air-circulating fans is difficultto define (see Figure 3). There is theprincipal jet from the fan with its axial,tangential (swirl), and radial velocitycomponents. There is also substantialairflow created by entrainment at theperimeter of the principal airflow jet.Local airflow close to the bladesincludes a strong vortex ring, estab-lished by the tips of the fan blades.

While all this airflow mixes or circu-lates air, measuring all resulting airmovement in the entire space due to acirculating fan is not practical. Themain function of a circulator fan is tocirculate and mix air movement withina space to ensure uniform conditionsthroughout a space. During winter,fans at low speed mix hotter air thataccumulates near the ceiling level withother air in a space, resulting in consid-erable savings in heating costs. Duringsummer, circulator fans are operatedat higher speeds to provide physiolog-ical cooling of up to 12F or more toworkers near the floor level.

Buoyancy was not considered in theCFD models, as the principal interestis in established destratified flow pat-terns. When stratified, there is lessthan a 2F difference in temperaturebetween the floor and ceiling. The ini-tial buoyancy force on cubic foot of airunder the roof, at say 98F whenmoved into air near the floor level at68F, is about 0.006 lbf/ft3—not a bigdeal compared to the momentumforces in the order of 3.5 lbf/ft3 devel-oped by the fan.

Predicting airflow patterns in largeindustrial buildings is complex due to the many obstructions to airflowencountered in such spaces. This iswhy CFD modeling is employed.

Determining Total AirflowMeasuring the airflow rate in the

principal jet from an air circulating fancan be achieved by integrating the X,Y, and Z air velocity vectors at a num-ber of radial positions close to thedelivery side of the fan blades using acrossed-wire, or crossed-fiber, thermalanemometer. Three fan blade chordwidths are suggested as a suitable dis-tance downstream from the fan formeasurements (see Figure 4). Todetermine the total airflow rate fromthe fan, at least 10 equally spacedmeasurement positions are neededbetween below the center of the fanout to below the tips of the fan blades.

(Note: At first glance, it may appearthat area distribution was not used inFigure 4; it is, by integrating the circu-lar rings between each measurementstation, as indicated in Figure 6.)

The appropriate time over whichvelocities are averaged can be deter-mined by taking a long time history ofvelocity (e.g., 10 minutes). The meanand standard deviation of this time his-tory of velocity are determined, andthen the time history is truncated, bysay 10%, and the mean and standarddeviation are recalculated. This isrepeated until a noticeable change, forexample 5%, is detected in the stan-dard deviation. This indicates thataveraging times for measuring velocityvectors should be longer than thistime period.• The Vx velocity vector (m/s or fpm)

is the tangential (swirl) velocitymeasured tangentially to the rota-tion of the fan blades. This ismeasured in a plane parallel to theplane of fan rotation.

Figure 3. Characteristic airflow from circulating fans.1Figure 2. Air circulation from an industrial ceiling fan ina distribution center with high racks.

AMCA 0610 9/29/06 2:05 PM Page 25

26 AMCA International InMotion

Figure 4. View of circulator fan indicating the suggestedmeasurement stations of three fan blade chord widthsdownstream of the fan.

Figure 5. Diagram showing resolution of Vx, Vy, and Vzinto resultant velocity vector Rvxyz.

Figure 6. View of circulator fan indicating the procedurefor integrating 3D velocity traverse data to estimate airflow rate.

3 bladechordwidths

Reverse flow sometimesoccurs near the fan hub

10 equally spaced velocitymeasurement positions

Vz Axial

Resultant VelocityRvxyz

Vx Radial

Vy TangentialRvxyz

Area = R288 – R2

7

2 4 6 8 10

Velocity = V7 + V8 2Flowrate = X Arean-(n-1)

2Vn + Vn-1Σ

N=2

10

• The Vy velocity vector (m/s or fpm)is the radial velocity measured in theradial direction from the center ofthe fan, measured in a plane parallelto the plane of fan rotation.

• The Vz velocity vector (m/s or fpm)is the axial velocity measured inplanes parallel to the axis of rotationof the fan. Some circulating fanshave reverse airflow back throughthe fan near the fan hub. Suchreverse flow is not normally includ-ed in the computation of the airflowrate for the principal airflow jet.The resultant velocity vector (m/s or

fpm) is obtained from the Vx, Vy, andVz velocity vectors. This is done byresolving the Vx and Vy vectors in theplane parallel to the fan rotation [Rvxy= (Vx2 + Vy2)0.5]. Similarly, the Vz axialvelocity vector is resolved with theRvxy vector [Rvxyz = (Rvxy2 + Vz2)0.5]to determine the resultant velocity vec-tor for all three Vx, Vy, and Vz velocityvector components (see Figure 5).

These resultant velocity vectors areintegrated to obtain the airflow rate(m3/s or cfm), by summing the averageof adjacent Rvxyz velocity vectors andmultiplying by the area of the circularring between the measuring positions(see Figure 6). It is important to knowthe value of the radial, and particularlythe tangential (swirl) velocity vectors ifCFD modeling of the airflow from thefan is envisaged.

This procedure can be simplified foran approximate estimate of the jet air-flow rate by measuring only the axialVz velocity vectors off the fan. Thismethod ignores the tangential (swirl)and radial velocity components, which

tend to be 10% or less than the axialvelocity vectors.

ConclusionsBy using the velocity profile, how

accurate was the solution comparedto laboratory test data? The speed ofthe fans was adjusted on-site for winter destrat operation so that airvelocities at head height did notexceed 50 ft./min. in order to avoiddraft complaints. In the longitudinalCFD simulation section through thefan, speeds at head height 5.5 ft. fellwithin the 46.2 fpm and 61.6 fpm CFDcolored velocity scale. Closer point-by-point examination at approximately 5.5ft. above floor level gave speeds of 49fpm to 53 fpm.

While 3D CFD modeling of airflow inlarge industrial spaces from large circulating fans can be useful, compu-tation times can be several days. Insome cases, even after thousands ofiterations of the calculations, conver-gence cannot be reached or thecomputer crashes. The introduction ofa virtual disk incorporating measured3D velocity profile data can substan-tially reduce computation times fromdays to hours.

References1) Smith, V. April 1960. “Air Circulator Fans: A Design

Method and Experimental Studies.” Report ARL/A119. Dept. of Supply, Australian Defence ScientificService, Aeronautical Research Laboratories,Melbourne.

Richard Aynsley, Ph.D., is director of research and devel-opment at Big Ass Fans, Lexington, KY. He is chair of thereview committee for ANSI/AMCA Standard 230-99. Hecan be reached at 859/233-1271 [email protected].

CI R C U L AT I N G FA N VE L O C I T Y PR O F I L E AP P L I C AT I O N S

AMCA 0610 9/29/06 2:08 PM Page 26

October 2006 27

By Ian P. Andrews

Aflurry of activity in the European Region has

more manufacturers becoming involved with the

development of standards.

There are generally three types of standards: internation-al, regional (including European), and national. Manystandards are developed in Europe to support variousEuropean directives. These directives emanate from theEuropean Commission and have tremendous impact on themanufacturing community. Let’s take a look at how theyaffect the ventilation industry in particular.

Ever-Changing RequirementsThe first directive to impact the European arena—the

Low Voltage Directive (LVD)—was introduced over threedecades ago. Issued under the Treaty of Rome in the early1970s, its goal was to open the European market; what wasfit for one country, would fit for all—or at least that was theintent. The LVD sought to ensure that all electrical productsup to 1,000 volts were “safe” in use.

Since then, there have been many new directives; most,but not all, have intended to protect people and the environ-ment. Manufacturers have had to ensure that their productsand processes comply with all these directives, and at thesame time, keep up with the ever-changing requirementsand regulations. In addition to the LVD, other examplesinclude the:• Machinery Directive• Electromagnetic Compatibility Directive• ATEX (Explosive Atmospheres) Directive• Packaging Directive

Many more new directives that will impact our industryare fast approaching. These include the:• Waste Electrical and Electronic Equipment Directive• Restriction of Hazardous Substances Directive• Energy Performance of Buildings Directive

The Energy Performance of Buildings Directive (EPBD), inparticular, will have far-reaching repercussions for theEuropean ventilation industry. There is an entire library of

new standards being produced in support of this directive.Various national building regulations (codes) are already ref-erencing new requirements that will result from thisdirective and also are anticipating requirements of some ofthe new standards. Indeed, the recently revised BuildingRegulations for England and Wales now requires fans tocomply with certain performance requirements. Theserequirements include not only air movement, but alsopower consumption, as measured according to various newharmonized European Standards.

The European Standards body CEN Technical CommitteeTC156—Ventilation in Buildings is producing numerousadditional new standards. Those that are likely to have thegreatest impact under this directive include:• prEN13779, Performance requirements for ventilation

and room conditioning systems

U P D AT E O N

European Directives and Standards

AMCA 0610 9/29/06 2:08 PM Page 27

28 AMCA International InMotion

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UP D AT E O N EU R O P E A N DI R E C T I V E S A N D STA N D A R D S

• prEN15239, Energy performance ofbuildings—Guidelines for inspectionof ventilation systems

• prEN15240, Energy performance ofbuildings—Guidelines for inspectionof air-conditioning systems

• prEN15241, Calculation methods forenergy losses due to ventilation andinfiltration in commercial buildings

• prEN15242, Calculation methods forthe determination of airflow rates inbuildings including infiltration

• prEN15243, Calculation of roomtemperatures and of load and energy for buildings with roomconditioning systems

• prEN15251, Indoor environmentalparameters for assessment ofenergy performance of buildingsaddressing indoor air quality, thermal environment, lighting,and acoustics.These standards are all being devel-

oped on the “fast track” and are likelyto be issued for final vote before theend of the year. At that stage, allEuropean countries will have theopportunity to vote either to adoptthem or not. If accepted, all Europeannations will be required to withdrawany conflicting standards.

The EPBD places certain require-ments on the various national memberstates, one of which requires buildingsto be regularly inspected and issued acertificate. In public buildings, this cer-tificate will need to be displayed in aprominent place. The inspection willreport on the efficiency of the manysystems that serve the building.Residential buildings are included, aswell as commercial.

Influencing the ProcessMany manufacturers believe that

since the directives and standardsimpact them so heavily, they need to

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October 2006 29

be in a position to influence the development and content of the docu-ments. The best way to do this isthrough relevant trade associations.These associations have a better abili-ty to influence the government groupsthat help develop the directives.

Manufacturers can be directlyinvolved in the process; however, it is not a straightforward task.Representatives from the many coun-tries within Europe—each with theirown agenda—all compete to havetheir positions known. The manufac-turing delegates, therefore, need to betechnically competent and politically

astute in order to ensure that theirinterests are taken into sufficient con-sideration.

These protocols are not unique tothe European arena—the processesinvolved are very similar during theproduction of International Standards.Regional differences can provide evengreater obstacles to reaching a con-sensus when producing InternationalStandards.

Due to all the activity taking placewith directives and standards in Europe,there has been an upsurge of activitycoming from many of the trade associa-tions. The April 2006 meeting of the

AMCA European Region, held inKarlsruhe, Germany, drew more atten-dees than it has in the last several years.

Additionally, membership in theAMCA European Region is growing.More manufacturers are realizing theyneed to be involved in developingstandards to ensure that those stan-dards will benefit both the industryand society at large.

Ian P. Andrews, chairman of the AMCA EuropeanRegion, is an independent consultant working with theventilation industry. He can be reached at +44 1903744067 or [email protected].

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30 AMCA International InMotion

List of AdvertisersAcme Engineering & Manufacturing Corporation . . . . . . . . . . . . . . . . . .23American Fan Company . . . . . . . . . . . . . . . . . . 29, 30

Atmosphere . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

Berner International Corporation . . . . . . . . . . . . . . . .11

Carnes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

Delhi Industries, Inc. . . . . . . . . . . . . . . . . . . . . . . . . .18

EBM Papst . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Greenheck Fan Corporation . . . . . . . . . . . . . . . . . . .BC

Hartzell Fan, Inc. . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

Industrial Louvers, Inc. . . . . . . . . . . . . . . . . . . . . . . .23

Kinetics Noise Control . . . . . . . . . . . . . . . . . . . . . . .14

Loren Cook Company . . . . . . . . . . . . . . . . . . . . . . . . .7

New York Blower Company . . . . . . . . . . . . . . . . . .IBC

Ruskin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13, 17, 21

T. A. Morrison and Company, Inc. . . . . . . . . . . . . . . . .4

Twin City Fan and Blower . . . . . . . . . . . . . . . . . . . .IFC

Advertising Sales Offices: 1300 E. 9th Streeet, Cleveland, OH, 44114 Joe Dahlheimer Ph: (216) 931-9279 [email protected] Tom W. Corcoran Ph: (610) 696-1820 [email protected] Wayne Bayliss Ph: (949) 857-1334 [email protected]

ACmaxx: The new generation of AC fan technologyebm-papst’s new ACmaxx technology is extremely versatile and can be used from 85 – 265 v, 50 & 60 Hz for theworldwide voltages. With up to75% lower power consumption, theACmaxx allows for a cost savings of at least 50% over standard ACfans! The ACmaxx will revolutionizethe way you think about AC.www.ebmpapst.us

Hartzell Fan’s full-line product catalog is now available on CD. This CD catalog also includes the IndustrialFan Guide and Fan Engineering Data. Torequest your copy, go toHartzell Fan’s homepage atwww.hartzellfan.com andclick on the CD catalog linkin the Latest News andAnnouncements section.

Ruskin’s Air Measuring SolutionsRuskin’s complete line of air measuring and IAQ products aredesigned with the latest code requirements in mind. AmongRuskin’s new products is a patented controller that combinesindoor air quality with economizer functionality. The controller,when combined with one of our air measuring and control prod-ucts, is one of the innovative ideas thatcontribute to meeting code requirements.From code-driven total monitoring and con-trol of outside air to simple measurementof the airflow at various points within thesystem, Ruskin has products that fit yourspecific applications. Visit our website atwww.ruskin.com, or call 816-761-7476.

AMCA 0610 9/29/06 2:09 PM Page 30

DUST/MATERIALHANDLING

Wide range of duty available with unique fan lines capable of handling light dust to heavymaterial. Typical applicationsinclude dust-collection and high-pressure process along with material-conveying.

AIR-HANDLING[CENTRIFUGAL]

Designed for clean to moderatelydirty gas streams. Commercial and industrial HVAC, process cooling, light material-conveying,heat removal, and dryer exhaustare just a few of the numeroussample applications

AIR-HANDLING[AXIAL]

For the ideal handling of cleanto moderately dirty airstreams.Commercial and industrial HVAC,drying and cooling systems, fumeextraction, and process-heatremoval are typical applications.

FIBERGLASSREINFORCED

PLASTIC [FRP]Choice of performance and duty forcorrosive gas streams. Applicationsinclude chemical process, wastewatertreatment, laboratory hood exhaust,and tank aeration.

CUSTOM PRODUCTSDesigned for unique applications. Variety of configurations, temperatures, flows, and pressures. Wide range of modifications and accessories are available to meet the most demanding specifications.

COMPLETE SELECTION OFAIR-MOVING EQUIPMENTThe New York Blower Company offers thousands of different types, models, andsizes of air-moving equipment. Contact your nyb representative for assistance inidentifying the best fan for your application.

THE BEST FANS STILL KEEP COMING FROM NEW YORK BLOWER!

THE NEW YORK BLOWER COMPANY®

7660 QUINCY STREET—WILLOWBROOK, ILLINOIS 60527-5530PHONE: [630] 794-5700 • FAX: [630] 794-5776 • E-MAIL: [email protected]

Visit us on the Web: http://www.nyb.com

ROOF VENTILATORSIncluding both hooded and upblast ventilators, propeller fans, and centrifugal roof exhausters. These units are ideal for industrial, commercial,and institutional applications.

PROCESS/FANCOMPONENTSPlug fans, plenum fans, wheels, inlet cones, and housings for a wide variety of OEM applications. Process/fan components are used in air-handling units, ovens, dryers, freezer tunnels, and filtration systems.

HEATINGPRODUCTSIndustrial-duty steam unit heaters with steam heating coils are availablefor facility heating andprocess-heat transfer.

ELECTRONICCATALOGOrder our windows-based fan-selection disk including complete product literature.

AMCA 0610 9/29/06 2:09 PM Page 31

A N Y B U I L D I N G P R O J E C T — A N Y V E N T I L AT I O N R E Q U I R E M E N T — A N Y W H E R E — A N Y T I M E

O u r n i c h e i s . . .

715.359.6171 • greenheck.com

FANS & VENTILATORS:The world’s widestselection meansyou can give yourclients exactly what they need tomeet their preciserequirements.Greenheck’s repu-tation for reliableperformance dataand unmatchedquality allows you to specify with accuracy, confidence andpeace of mind.

CENTRIFUGAL& VANE AXIALFANS:Greenheck offers a wide range ofAMCA-licensedproducts for com-mercial, industrial,and lab ventilationapplications. Ourreliable productswill add valuethrough innovativedesigns that maxi-mize efficiencieswhile reducingsound.

ENERGYRECOVERY VENTILATORS:Improve indoorhumidity, meetASHRAE 62 ventila-tion requirementsand maximize energy savings witha solution that iseasy on your firstcost budget. Checkout our comprehen-sive line of energyrecovery products.

MAKE-UP AIRUNITS:Choose from theindustry's broadestselection of highquality and eco-nomical make-upair products forcommercial, indus-trial, food serviceand warehouseapplications. A variety of heatingand cooling optionsare available foryour 100% make-upair or recirculationneeds.

KITCHEN VENTILATION:Specify the industryleader in greaseextraction technol-ogy. Your singlesource for com-plete ventilation,fire suppressionand utility distribution systems that easilyaccommodatechanges in cookingequipment layout.

DAMPERS &LOUVERS:Provide proven performance whenyou specify thewidest selection of AMCA-licenseddampers and louvers in theindustry. Greenheckoffers the most UL-certifieddampers. Custom-engineered louversin any size, anyshape, any color.

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