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 great for reducing plant and employee heat tension. Our exhaust fans provide excellent ventilation for high tunnels and frosty frames. Create a cooler more comfortable growing environment, that may directly contribute to efficiency, quality and profitability for your greenhouse business. Exhaust fans also works great in workshops and structures.
Move and refresh the stagnant air in your greenhouse to create a healthier and more productive environment. These exhaust & circulating fans are great for plant development. Create a cooler convenient growing environment, which can directly contribute to efficiency, quality and profitability for your greenhouse business.
The concept of cooling a greenhouse with thermal buoyancy and wind dates back to the beginning of managed environment. All Greenhouse Vent Fan Greenhouses built prior to the 1950’s experienced some type of vents or louvers that were opened to enable the excess heat to flee and cooler outside air to enter.
When polyethylene originated with large sheets covering the whole roof, placing vents on the roof proved difficult. Engineers after that came up with the concept of using followers that pull outside air flow through louvers in one endwall and exhaust it out the contrary end. With thermostatic control, this is, and still may be the accepted way for cooling many structures where positive atmosphere movement is needed.
Growers with hoophouses possess found that roll-up sides work well for warm time of year ventilation. Both manual and motorized systems can be found. A spot with good summer time breezes and plenty of space between houses is needed. It can help to have greenhouses designed with a vertical sidewall up 
to the height of the attachment rail to lessen the quantity of rain that can drip in.
Greenhouses with roof and sidewall vents operate on the principle that temperature 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 even more of the ventilation. Wind passing over the roof creates vacuum pressure and sucks the heated air out the vent. If sidewall vents are open, cool replacement atmosphere enters and drops to the floor level. If the sidewall vents are closed, great air enters the bottom of the roof vent and the heated are escapes out the very best of the vent.