Blower Door results
Matthew Ball
17 Michaels Drive
Queensbury, NY 12804
518.361.3415
sammball23@gmail.com
We, ClearVU Inspections, performed a one-point air tightness, blower door test in
accordance with ASTM E 779-10 on the single family dwelling at 17 Michaels Drive,
Queensbury, NY, to determine the air changes per hour on March 27, 2021. The
dwelling was depressurized and the testing procedure performed as per IECC –
R402.4.1.2.
Test conditions were as follows:
Fan location - garage door
361’ above sea level
839 CFM50
64°F outside air temperature
66°F inside air temperature
Pre-Test Baseline Building Pressure 0.3 PA
-50.0 Pa testing pressure
TEC DG-1000 & Model 3 Fan
Building Volume Calculated via architectural plans
Altitude Correction Factor = (1+(.000006 x altitude)) x CFM50 = n/a
Results: ( 839 CFM50 x 1.000 x 60 Minutes) / ( 17,880 cubic feet) =
2.82 ACH50
IECC – R402.4.1.2 - The building or dwelling unit shall be tested and verified as having an air leakage rate of not
exceeding 5 air changes per hour in Climate Zones 1 and 2, and 3 air changes per hour in Climate Zones 3 through
8. Testing shall be conducted in accordance with ASTM E 779 or ASTM E 1827 and reported at a pressure of 0.2
inches w.g. (50 Pascals). Where required by the code official, testing shall be conducted by an approved third party. A
written report of the results of the test shall be signed by the party conducting the test and provided to the code
official. Testing shall be performed at any time after creation of all penetrations of the building thermal envelope.
During testing:
1. Exterior windows and doors, fireplace and stove doors shall be closed, but not sealed, beyond the intended
weatherstrippingor other infiltration control measures;
2. Dampers including exhaust, intake, makeup air, backdraft and flue dampers shall be closed, but not sealed beyond
intended infiltration control measures;
3. Interior doors, if installed at the time of the test, shall be open;
4. Exterior doors for continuous ventilation systems and heat recovery ventilators shall be closed and sealed;
5. Heating and cooling systems, if installed at the time of the test, shall be turned off; and
6. Supply and return registers, if installed at the time of the test, shall be fully open.
Ryan Wild
HERS Rater/BPI - 5063518
ClearVU Inspections
www.clearvuinspections.com
Ryan Wild
518.832.9213
ryan@clearvuinspections.com