blower door test
NORTH EAST BUILDING PERFORMANCE ADVISORS
Serving the Capital District, Saratoga and Adirondack Regions
August 18, 2020 7 Rocky Ridge, Warrensburg, NY 12885
Foothill Builders LLC
9 Mountainside Drive
Queensbury, NY 12804
RE: Blower Door Test for NYS Building Code,
Mr. Joseph Leuci:
After inspection of the New 2 Story Home at 36 John Clendon Road, Queensbury,
New York and completion of a Blower Door Test consistent with the practice of
depressurization to 50 Pascal in a winter condition with the exterior windows and
doors shut and the interior doors to all the rooms open, my observations are as
follows:
This home tested passed the current New York State Building Code for Air Changes
per Hour @ 50 Pascal of less than or equal to 3 ACH/50 (for Homes permitted after
st
November 1, 2016). The tested number is 2.836 ACH/50 Pascal.
The total volume of conditioned space at 36 John Clendon Road is 25070 cubic feet
taking into consideration all conditioned space in the home. The cubic feet per
minute @ 50 Pascal was 1185 CFM/50. The height correction factor for New York
State is 14 for a two story building, as such the tested home @ 36 John Clendon
Road, has the natural rate of air exchange of 0.2025756 air changes per hour/natural
or 84.6 cfm natural air infiltration credit based on the blower door test.
In the latest (2013) version of ASHRAE 62.2, high-performance homes need to be
ventilated at 7.5 cfm per bedroom + 1, plus 3 cfm per 100 square feet of living space.
That means for 3+1 bedrooms it would need 1824 sq ft/100 times 3 cfm= 54.7 cfm +
30 cfm or 84.7 cfm total for a deficit of 0.1 cfm. It would also be advantageous to use
the bathroom and kitchen fans to help control humidity and set or run the HRV in the
heating season to improve indoor air quality and make up for the deficit.
My credentials are as follows:
BPI Certified Building Analyst
BPI Certified Envelope Specialist
BPI Certified Heating Professional
If you have any questions regarding my findings please feel free to contact me.
Sincerely,
Jack Towne
1.888.472.2774
7 Rocky Ridge Road 4A Vatrano Drive
Warrensburg, NY 12885 Albany, NY 12205
Phone (518)623.7016 Phone (518)350.2941
Fax (518)623.7015 Fax (518)694.0102