1 connecticut’s new energy code connecticut ashrae tech session october 13, 2011 frederick f....
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Connecticut’s New Energy Code
Connecticut ASHRAE Tech SessionOctober 13, 2011
Frederick F. Wajcs, Jr.Senior Energy Engineer
Connecticut Light and Power
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New Energy Code
2009 International Energy Conservation Code (IECC)
Effective October 7, 2011
2009 International Residential Code (IRC) Anticipated in Second Half 2012
201x New State Building Code
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Reasons for New Code
Improve the energy efficiency of buildings
Reduce carbon emissions
Requirement for receipt of stimulus funds (including achieving 90% compliance by December 2017)www.energycodes.gov/arra/compliance_checklist.stm
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Key Areas
Applicability
Construction document information
Technical requirements
Completion requirements
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Applicability
New construction Additions, alterations, renovations or repairs
to an existing building, building system or portions thereof
Change in space occupancy or use that increases energy demand
Change from one lighting use to another Change in space conditioning
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Construction Document InformationSpecifically stated in Section 103.2 (Administration)
Insulation materials and their R-values Fenestration U-factors & Solar Heat Gain Coefficients (SHGC) Area-weighted U-factors and SHGC calculations Mechanical system design criteria Mechanical and service water heating system and equipment
types, sizes and efficiencies Economizer description Equipment system and controls Fan motor horsepower and controls Duct sealing, duct and pipe insulation and location Lighting fixture schedule with wattage and control narrative Air Sealing details
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Other Compliance Informationfor Commercial Buildings Name of code for compliance Heating and cooling load calculations
(max. 72ºF heating, min. 75ºF cooling) Interior lighting power allowance and
connected power Exterior lighting power allowance and
connected power Details necessary for verifying compliance
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Technical Requirements
Mandatory
Prescriptive
Performance
Commercial project must comply with either 2009 IECC in entirety or ASHRAE/IESNA Standard 90.1-2007 in entirety
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Commercial Technical RequirementsChapter 5 - Envelope
Vertical fenestration 40% maximum of above grade wall
Skylight 3% maximum of roof area Insulation and fenestration criteria Opaque wall insulation R-value or U-factor IC rated luminaires in thermal envelope and
sealed between housing and wall/ceiling covering.
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Commercial Technical RequirementsChapter 5 – Envelope Continued
Air Leakage Window and door assemblies Curtain wall, storefront glazing and entrance
doors Sealing building envelope Dampers on air intake and exhaust openings Loading dock weatherseals Vestibules Plenum insulation and sealing
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Additional / Different Requirements Under Standard 90.1-2007 Replacement fenestration needs to comply if
>25% of total existing fenestration area Skylight 5% maximum of roof area
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Commercial Technical RequirementsChapter 5 - Mechanical
Calculated heating and cooling loads for equipment sizing
Equipment performance Air cooled package equipment more efficient Chiller application & ratings changed
Thermostatic control for each zone Heat pump control of supplementary electric-
resistance heat Automatic setback, shutdown and shutoff controls Fan horsepower limitation, hp/cfm
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Commercial Technical RequirementsChapter 5 – Mechanical Continued
Duct and plenum insulation and sealing High pressure duct and plenum leak testing Pipe insulation Radiant heating systems for outside building
controlled by occupancy sensor or time switch
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Commercial Technical RequirementsChapter 5 – Mechanical Continued
Automatic or readily accessible manual switch on service hot water circulating pumps
Snow melt system controls Readily accessible on-off switch on pool
heaters without adjusting set point Time switched on pool heaters and pumps
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Commercial Technical RequirementsChapter 5 – Mechanical Continued
Economizers Speed control on VAV fans ≥10 hp Demand control ventilation for spaces >500
sq. ft. and 40 people per 1,000 sq. ft. Energy recovery on fan systems ≥5,000 cfm
and minimum outside air ≥70% of supply air Automatic supply air temperature reset
controls on multi-zone systems
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Commercial Technical RequirementsChapter 5 – Mechanical Continued
Isolation of cooling tower on water loop heat pump systems
Two position valves on water loop heat pumps
Pump, boiler and chiller isolation Automatic speed control on cooling tower
fans ≥7.5 hp
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Commercial Technical RequirementsChapter 5 – Mechanical Continued
HVAC system completion System balancing Operation manuals, complete with written
narrative of how each system is intended to operate
Maintenance manuals
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Additional / Different Requirements Under Standard 90.1-2007 Automatic shutdown control for ventilation fans >0.75
hp Single zone VAV for AHU ≥5 hp HVAC system commissioning for conditioned area
>50,000 sq. ft. Optimum start controls for systems >10,000 cfm Speed control on pump motors >50 hp Efficiency requirements for SPVAC & SPVHP Duct & pipe insulation requirements
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Additional / Different Requirements Under Standard 90.1-2007 Voltage drop design criteria for conductor
sizing Record power drawing submittal to owner Complete narrative of how each power
system is intended to operate Power operations manuals and maintenance
manuals for each piece requiring maintenance
Calculated service water load
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Commercial Technical RequirementsChapter 5 – Service Water heating
Equipment performance Temperature controls Heat traps Pool covers
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Commercial Technical RequirementsChapter 5 – Electrical
Each enclosed area to have at least one manual lighting control
Manual control to allow ≥50% reduction in lighting load
Automatic lighting shutoff for buildings ≥5,000 sq. ft.
Daylight zones to have independent controls
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Commercial Technical RequirementsChapter 5 – Electrical Continued
Master lighting switch for hotel / motel / boarding housing sleeping units
Automatic exterior lighting control IC-rated and labeled recessed luminaires in
building thermal envelope All recessed luminaires sealed between
housing and wall / ceiling covering Tandem wiring Exit signs <5 watts per side
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Commercial Technical RequirementsChapter 5 – Electrical Continued
Total connected interior lighting power must be less than the calculated interior lighting power
Total connected exterior lighting power must be less than the calculated exterior lighting power (Separate for tradable and non-tradable surface)
Exterior building grounds luminaires >100 watts must have lamp efficacy >60 l/w
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Additional / Different Requirements Under Standard 90.1-2007 Lighting system replacement in space shall comply
with lighting power density Direct replacement of existing control device shall
comply with new control requirement Automatic lighting control required in defined spaces Separate control required for defined lighting Lighting power densities for building types and space
types Base site allowance replaced 5% exterior lighting
additional unrestricted allowance (in 2008 supplement).
Record drawing submittals to owner
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Completion
Confirm installation is per approved drawings Provide documentation that required controls
are installed Provide documentation that connected
lighting power is less than calculated lighting allowance
Confirm submittals have been provided Received all required inspections
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Additional Information on web
www.ctashreae.org under Technology Transfer Table of 2006 IECC, 2009 IECC and 90.1-
2007 with 2008 supplement requirements Table of 90.1-2001, 90.1-2004 and 90.1-2007
requirements www.aiact.org under Building Performance &
Regulations Committee Compliance Documentation Spreadsheets
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Connecticut Energy Efficiency Fund
Energy Opportunities program for commercial retrofit
Energy Conscious Blueprint program for commercial new construction and equipment replacement
www.ctenergyinfo.com 1-877-WISE-USE (1-877-947-3873)
