Move and refresh the stagnant atmosphere in your greenhouse or building to create a healthier and more productive developing environment. These greenhouse exhaust supporters are excellent for reducing plant and employee heat stress. Our exhaust followers provide exceptional ventilation for high tunnels and frosty frames. Create a cooler more comfortable growing environment, that may directly contribute to productivity, quality and profitability for your greenhouse business. Exhaust enthusiasts also works great in workshops and structures.
Move and refresh the stagnant surroundings in your greenhouse to make a healthier and more productive environment. These exhaust & circulating fans are great for plant growth. Create a cooler convenient growing environment, that may directly contribute to productivity, quality and profitability for your greenhouse business.
The idea of Greenhouse Vent Fan cooling a greenhouse with thermal buoyancy and wind dates back to the beginning of controlled environment. All greenhouses built just before the 1950’s got some form of vents or louvers that were opened to allow the excess heat to flee and cooler outside air flow to enter.

When polyethylene originated with large sheets covering the whole roof, putting vents on the top proved difficult. Engineers after that came up with the idea of using fans that attract outside air flow through louvers in one endwall and exhaust it out the opposite end. With thermostatic control, this is, and still is the accepted method for cooling many structures where positive surroundings movement is needed.

Growers with hoophouses have discovered that roll-up sides work very well for warm period ventilation. Both manual and motorized systems can be found. A location with good summer season breezes and plenty of space between homes is needed. It can help to have greenhouses made with a vertical sidewall up to the height of the attachment rail to lessen the quantity of rain that may drip in.

Greenhouses with roof and sidewall vents operate on the principle that warmth is removed by a pressure difference created by wind and temperature gradients. Wind performs the major function. In a well designed greenhouse, a wind acceleration of 2-3 kilometers/hour provides 80% or more of the ventilation. Wind moving over the roof creates a vacuum and sucks the heated surroundings out the vent. If sidewall vents are open, cool replacement atmosphere enters and drops to the floor level. If the sidewall vents are closed, awesome air enters the bottom of the roof vent and the heated are escapes out the very best of the vent.