Features of Greenhouse Circulation Fan
Small fans with a cubic foot per minute air moving capacity equal to one quarter of the air volume of the greenhouse are sufficient. For small greenhouses, place the fans in diagonally opposite corners. If you have a larger greenhouse, you may need to place circulation fans at the halfway mark of the length. Also, you may need to place 4 across on the width. For most hobby greenhouses, one in each corner will be sufficient. Turn the circulation fans off during the warmest summer months when the greenhouse will be needed to be ventilated. An often overlooked item, the greenhouse circulating fan is a small investment for healthy plants.
These are also often referred to as HAF fans, horizontal air flow fans.
Greenhouse Circulation Fan
Solar Powered Greenhouse Circulation Fan
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