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November 26th, 2017

11/26/2017

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Calculating the volume of a home is pretty simple math.  You measure the length  x width x height of all the interior spaces.  I'm going to use a Test House which measures 20ft x 30 ft and has 2 floors which are 8 ft tall.
Picture
The volume of the home is 9,600 cubic feet. My Blower Door reading was 5,400.  I can now print a report translating what that all means to the owner of the home.
The test shows an air exchange rate of 33.75 per hour @  -50pa.  That rate of air leakage represents a hole in your home of about 3.75 sfT. The Blower Door reading for a house of this size (if it was built today ) should be about 480.  I would recommend this house be "tightened up" approximately 90%.
That "tightening up" process is called Air Sealing and I'll  start that conversation tomorrow.
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    rob maloney

    Trying to put on paper what's in my head.

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