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Blower Door Test relative to ASHRE 62.2
Last Post 14 Jun 2009 08:00 AM by jonr. 2 Replies.
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fall50User is Offline
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12 Jun 2009 11:44 AM

We have recently done a blower door test.  Our house is old 1940's bunglow and has multiple obstacles for air sealing.  Post blower door we tested @ 1500 cfm @ 50 Pascal's  which compared  to new construction standars is fairly leaky.  However for older house it's a step in the right direction


According to ASHRE 62.2 a house 1with 900 sqft house with 3 bedrooms needs bewteen 60 -75cfm of fresh air ventilation.

My question is:  relative to what my house tested for on the blower door (its getting a fair amount of infiltration because of its "leakiness")  In my case would fresh air ventilation even be neccessary via a product like an Fancycler or something similar

http://www.fancycler.com/need/default.htm
Bruce FreyUser is Offline
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14 Jun 2009 02:19 AM
50 Pa is roughly 1lb/sf and is about the same as a 20 mph wind.  Depending on what experts you listen to (including ASHRAE), residential building should have between 0.5 and 1.0 air changes per hour or 20 cfm/occupant. 

Hopefully the blower door test identified areas of improvement.  As it stands today, I don't think you  have a ventilation problem so I would rather spend the money to tighten up the house. 

Fixing air leaks is usually a very cost effective way to save energy.

Bruce
jonrUser is Offline
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14 Jun 2009 08:00 AM
Agreed. Tighten up the house and add wind blocks (trees?).
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