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re: solar attic gable fans
23 jun 2004
honka honka burnin' love  wrote:

>a small solar fan won't produce the air flow you need.  neither will sofit
>vents.   sofit vents are mainly for moisture control, not cooling.

how much airflow does she need? soffit and ridge and gable vents with
vent area a and height and temperature differences h and dt will produce
cfm = 16.6asqrt(hdt). for instance, a = 4 ft^2 with h = 8' and dt = 10 f
makes 594 cfm.

nick




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