HomeMy WebLinkAboutBlower Door Test Report
Client:
Peter Stewart
Home tested:
392 River Bank Lane, Glenwoodsprings
To whom it may concern;
Blower Door testing Results:
RE: air leakage Testing
A completion depressurization air leakage test was performed by Elan B of NZB/Building Performance
Contractors on 4-15-25. The air leakage rate was:
Main house all areas and garage - 836 CFM 1.3 ACH @50PA
Both pass the code requirements up to 2021.
2009 Code requires less than 7 ACH.
2015 Code requires less than 3 ACH.
2021 Code requires less than 3 ACH.
Duct Leakage testing
N/A -Not requested
Mechanical ventilation should be used. This is especially important at times of high occupancy
and high interior humidity level (showers, cooking, etc)
Explanation of ACH:
CFM50: This is the airflow (in Cubic Feet per Minute) needed to create a change
in building pressure of 50 Pascals. CFM50 is the most commonly used measure
of building airtightness.
ACH at 50 Pa: The Air Changes per Hour (ACH at 50 Pa) is another commonly
used measure of building airtightness. ACH at 50 Pa is the number of complete
air changes that will occur in one hour with a 50 Pascal pressure being applied
uniformly across the building envelope. ACH at 50 Pa is a useful method of
adjusting (or normalizing) the leakage rate by the size (volume) of the building.
ACH at 50 Pa = (CFM50 x 60) / building volume in cubic feet.
Notes; House is 39,778 CuFt. not including the un heated garage. The crawler is sealed off from the rest of the house while the attic is still within the thermal
boundary so the upper hatch was cracked while the crawler door was closed during the test. The fireplace was still brand new and clean with a damper in place
keeping it closed. All doors and windows were closed and locked shut. The furnace was turned off during the test. Everything went well and the test came back
positive with a passing score of 1.30 ACH!
Richard Backe
PO Box 261
Carbondale, Co 81623
970-379-4198
End of report