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Air Sealing 101
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Ventilation Calc
Attic Leakage
Dew Point Calc

Start CFM50 ( Normal blower door test )
Start Attic Pascals ( Pressure between attic and zone )
End CFM50 ( CFM after adding hole to get more than 6 pascal change )
End Attic Pascals ( Ending pressure between attic and zone)
Ne
Ne is the flow exponent between the zone and the outside.
From the guy who developed the math...
"The 0.60 might be a better estimate if the
zone is an attic, but it can be argued either way.
...Michael Blasnik"














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