2013, 09-25 Permit: BLD-2013-1256 Duct Leakage Affidavit Code WASHINGTON STATE UNIVERSITY
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Duct Leakage Affidavit
Permit#:
House address or lot number 16619 E 10th Ave
City: Spokane Valley,WA Zip:
Cond. Floor Area (ft2): 3700 Source (circle one): Plans Estimated Measured
Duct tightness testing is not required for this residence per exceptions listed at the end of this form. Yes No
Air Handler in conditioned space? 411110 No
Air Handler present during test? Yes No
Circle Test Method: Leakage to Outside Total Leakage
Maximum duct leakage:
Post Construction,total duct leakage: (floor area x.08) = CFM@25 Pa
Post Construction, leakage to outdoors: (floor area x.06) = CFM@25 Pa
Rough-In,total duct leakage with air handler installed: (floor area x .06) _ CFM@25 Pa
Rough-In, total duct leakage with air handler not installed: (floor area x.04) = CFM@25 Pa
Test Result: I Li 0 CFM@25Pa
Ring (circle one if applicable): Open Mid Low
Duct Tester Location: (.4,( . itigaTr Pressure Tap Location: e,lA.5e,t '`-L Supply
I certify that these duct leakage rates are accurate and determined using standard duct testing protocol.
Company Name: Home Energy Audit Tech Technician: Lyle Brown
Technician Signature: Ala'harm Date:_ 09/25/2013 Phone Number: 509 280 0381
Washington State Energy Code reference:
503.10.3 Sealing.AU ducts,air handlers,filter boxes,and building cavities used as ducts shall be sealed.Joints and seams shall comply with Section
M1601.3 of the International Residential Code or 603.9 of the International Mechanical Code.Duct tightness testing shall be conducted to verify that the
ducts are sealed.A signed affidavit documenting the test results shall be provided to the jurisdiction having authority by the testing agent.When required
by the building official,the test shall be conducted in the presence of department staff.
Exceptions: 1.Duct tightness test is not required if the air handler and all ducts are located within conditioned space.
2.Duct testing is not required if the furnace is a nondirect vent type combustion appliance installed in an unconditioned space.A maximum of six feet of
connected ductwork in the unconditioned space is allowed.All additional supply and return ducts shall be within the conditioned space.Ducts outside the
conditioned space shall be sealed with a mastic type duct sealant and insulated on the exterior with R-8 insulation for above grade ducts and R-5 water
resistant insulation when within a slab or earth.