How to Select the Correct Size of Exhaust Fan

Greenhouse Growing Tips

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keep your greenhouse running efficiently.

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What
Size Circulation Fan Do I Need?

1. Greenhouse
area x 10 = fan cfm.

  • Example:
    8′ x 12′ = 96 sq. ft. x 10 = 960 cfm

2. If your
greenhouse if half full of plants, deduct 50% (960 x .5 = 480 cfm). 

3. If your greenhouse is very full of plants, add 50% (960 x 1.5 = 1440
cfm).


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