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Old 05-15-12, 10:22 AM   #9
MN Renovator
Less usage=Cheaper bills
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Join Date: Nov 2010
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I found a picture of the blower door that my energy auditor used on my house. Looked nothing more than a tarp with a way to lock it into the door with two magnehelics and a high velocity fan with a variable speed knob near the magnehelics.

He then took the pressure of the building and used his cheat sheet for the pressure drop through the blower to come up with his figure. Mags are under $100 on ebay and a tarp and a few metal shower door bars would be a little over $20. Add a variable speed blower fan to get the pressure you need and it could be done for $300 probably. These things really don't look complicated at all.

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