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Free Greenhouse Supplies
Evaporative Coolers | Exhaust Fans and Shutters | Circulation Fans | Auto Vent Openers

View our Selection of Exhaust Fan Systems

Greenhouse Fan CFM Calculator
ft.
Length of Greenhouse
Greenhouse Exhaust Fan
ft.
Width of Greenhouse
ft.
Height of Greenhouse
W x L x (H x 1.2)
Fan CFM Needed - This is the optimal exhaust fan CFM (Cubic Feet per Minute) rating for your greenhouse. A fan this size will exchange the air in your greenhouse in less than a minute which is recommended for venting small greenhouses.
Note: You need to have Javascript enabled on your browser for the calculator to work.

Greenhouse Shutter Size Calculator
in.
Exhaust Fan Size
Choosing Shutters
This calculator provides you with the minimum recommended intake shutter size for the fan size specified. Two shutters are recommended for greenhouses over 10 ft. wide to provide better distribution of fresh air.

NOTE: Using smaller intakes than recommended will reduce the CFM of the fan and may cause the motor to overheat and/or wear out prematurely.
  Minimum Intake Size
in.
Size if using One Shutter
in.
Size if using Two Shutters
in.
Size if using Four Shutters
Note: You need to have Javascript enabled on your browser for the calculator to work.
View our Selection of Exhaust Fan Systems


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Ordering and Shipping Information    

ACF Greenhouses
380 Greenhouse Drive
Buffalo Junction, VA 24529
888-888-9050 - Toll Free
434-374-2055 - Fax


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