2014, 11-18 Duct Testing CalculatorDuct Testing Calculator (New Construction)
House address or lot #:
Conditioned Floor Area:
Duct tester location:
• Pressure tap location:
Ring (if applicable):
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At Rough -In or Post Construction
Test Method
Standards
Calculated
Target
Testi
CFM2s
Alr Handler Present (Leakage
to Exterior or TotarLeakage)
< 4 CFM25 per 100 sf of CFA
cg (O
w
Air Handler not Present
5 3 CFM25 per 100 sf of CFA
Leakage to Exterior or Total Leakage)
1.- Test CFM25 must be equal to or less than the calculated target.
Air Leakage testing Calculator (Blower Door Test)
_ Conditioned Floor Area:
Ceiling Hieght (ft)
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Calculated Volume (cubic feet)
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0
Standard
Tested CFM50
Calculated Test
Result (ACHso)
ACHso (CFMSoX
<_�-127
60 - conditioned Volume)
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Glossary
Rough -In: After installation of the complete air distribution system but before installation of insulation and
sheet rock. Allows for access to all duct seams and connections for re-evaluation of seal integrity if standard
is not rnet in intitial test.
Post Construction: At or near final inspection. The home must be complete enough to pressurize the home
to 25 pa.
Total Leakage: Aggregation of the entire systems duct leakage in a duct test.
Leakage to Exterior: Aggregation of all duct system leaks to the exterior of the CFA in a duct test.
Pascal (pa): Unit of pressure
CFA: Conditioned floor area in square feet
CFM25: Cubic feet per minute of air leakage at 25 pascals of pressure
CFMso: Cubic feet per minute of air leakage at 50 pascals of prt
Conditioned Volume: Volume of conditioned space (CFA X ceil
ACHso: Air changes per hour at 50 pascals of pressure
410
its ;cnfviotr'Hf,Aira WtS€ INSULA<<QN
16019 E. Lacrosse Lane, Spokane Valley, WA 99216
Cell (509) 294-1112
E-mail - chriss@iwinsulaion.com
#IWIINI'111 MU -WA. • #RCE -19317 -IDAHO • 62240 -OREGON
Office (509) 926-3136 • Fax (509) 474-0320
Chris Schuh, Production Manager
-:r:r
'The Energy 8 Sound Professionals'