HomeMy WebLinkAboutBlower Door TestClient:
Luis Vargas
Home tested:
543 Ponderosa Circle
Battlement mesa 81635
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 2-15-24.The air leakage rate was:
Main house all areas and garage -1379 CFM 3.4 ACH @50PA
Both pass the code requirements up to 2009.
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 (FYI -a/c unit is in thermal boundary)
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 just under 2000 square feet coming in at 1983 square feet.The Garage is not heated and was therefore left closed off during the pressure test.
The crawler was heated and as such I had cracked the crawl space hatch before starting the test.All doors and windows were shut and latched and the furnace
was verified to be turned off(disconnected).The manometer was set for a 10 second time average to provide us with the most accurate number possible.The
permit was pulled at the end of 2023 so it therefore should be allowed to be tested up to the 2009 IECC code requirements.PASS.There is a hole in the dry wall
about to range hood that blew out insulation when i turned on the blower door.This opening goes strait into the unconditioned attic spaceand i believe that itt would
drop the score down to something in the 3.0 or below range allowing it to pass up to the 2021 IECC code.
Richard Backe
PO Box 261
Carbondale,Co 81623
970-379-4198
End of report