station 3 ?? air meters combustion analyzer carbon monoxide carbon dioxide particles air flow vane...

Station 3 ?? Air MetersCombustion AnalyzerCarbon MonoxideCarbon Dioxide Particles Air Flow

Vane AnemometerExhaust Flow Box

PressuresCAZ Test

No carbon monoxide should be detected in residential properties.

Check outside air CO

(set to “zero” outside)

any CO found inside is being produced inside, or being re-entrained from flue, etc.

CO Poisoning from Combustion Appliance Back-drafting

Big Holein Building!

Exhaust appliance in confined space

dryer pullingflame out of the heater

Supply Air Leak tothe outside

= Building Depressurized

Supply Air Leak to the Outside

Supply Duct Leaks to the outsidecause building to be Depressurized

Supply Duct Leaks to the outside

• # sq inches for cfm into rooms• Icf performance• Pv costs kWh now• ICBO 50 cfm crawls

Forced Air Systems(with insufficient “return”)

Door closure causes Room A to be pressurized

Zone B with return grill and combustion appliances is now under negative pressure and spillage or backdrafting can occur

A

BCan cause back-drafting of combustion devices

As CO2 builds up,so does “everything else”…

As CO2 builds up,so does “everything else”…

IAQ Pro-Tip

“Everything else” is too difficult to measure

and interpret

Carbon Dioxide (CO2)

• Generally not a health hazard in buildings by itself.

•Outside CO2 levels usually in the 380 ppm range . . . and rising !

•Industrial Standard = 5,000 ppm

96

Carbon Dioxide (CO2)• Used to estimate air exchange rates

• Concentrations above 800 to 1,000 ppm indicate:

■ Crowded spaces ■ Low ventilation rates

• Based on:

– 380 ppm CO2 outside air

– sedentary adult population– steady state indoor air concentration 97

Cubic Feet Per Minute (CFM)

~ 15 cubic feet fresh air per minute for each person

for classrooms (cfm/p)

CO2 Estimate of Ventilation

• Over-• Ventilated• Ideal• Under-

Ventilated

400 600 800 1,000 1,500 2,000+

Carbon Dioxide parts-per million (ppm)

(energy issue)

(multiple issues !! )

Outside Air

----- 5 cfm/p

----- 10 cfm/p

----- 15 cfm/p

----- 20 cfm/p

----- 25 cfm/p

Unacceptable

Poor

ASHRAE Standard 62

Outdoor

Carbon Dioxide (ppm)2,400

1,400

1,000

800

600

380 (and above)

Carbon Dioxide vs. Ventilation Rate

99

CO2 Concentration (ppm)

OU

TS

IDE

AIR

(C

FM /

PER

SON

)

30 -

25 -

20 -

15 -

10 -

5 -

0 -0 1000 2000 3000 4000 5000 | | | | | |

100

Using the Vane Anemometer

Check exhaust fan flow

Exhaust Fan Flow Meter

3- Position Opening: “E1” “E2” “E3”

Manometer & Flow Meter

This set up measures pressure – must use the table

Pressure & CFM Table

Manometer & Flow Meter

Flow reading direct from meter – “EX device”

M. Lipsett, California Office of Environmental Health Hazard Assessment

10.0 micrometers

2.5 micrometers~ 70 micrometers

Average Human Hair 70 micrometers

• MERV PARTICLE TYPICAL CONTROLLED SIZE (m*) CONTAMINANT

• 1 – 4 >10.0 Pollen, sanding dust, textile and carpet fibers

• 5 – 8 3.0 – 10.0 Mold, spores, hair spray, cement dust

• 9 – 12 1.0 – 3.0 Legionella, lead dust, welding fumes

• 13 – 16 0.3 – 1.0 Bacteria, most tobacco smoke, insecticide dust, copier toner

• 17 - 20 0.3 Virus, combustion smoke, radon progeny

• *micron meter

107

HEPA Output

Laser Particle Counter6 sizes of airborne particles

30 BuildingsMinimum 8 classrooms

Highest and lowest values deleted

112,000

27,170

17,937

11,427

130

Highest Measurement in 30 schools

Average of each highest in 30 schools

Average of 30 averages

Average of each lowest in 30 schools

Lowest measurement in 30 schools

0.3 Micrometer



40,200

8,156

4,447

2,533

314






0.5 Micrometer



17,000

3,739

1,641

677

40






1.0 Micrometer



15,500

2,447

1,285

402

10






2.0 Micrometer



2,100

315

156

63

0






5.0 Micrometer



3,600

56

32

9

0






10.0 Micrometer

station 3 ?? air meters combustion analyzer carbon monoxide carbon dioxide particles air flow vane...

Documents

outside slide

heater slide

classrooms cfmp slide

vane anemometer slide

confined space slide

check exhaust fan flow

meter ex device slide

e1 e2 e3 slide