Move and refresh the stagnant air in your greenhouse or building to create a healthier and more productive developing environment. These greenhouse exhaust enthusiasts are great for reducing plant and worker heat tension. Our exhaust supporters provide excellent ventilation for high tunnels and chilly frames. Create a cooler more comfortable growing environment, that may directly contribute to efficiency, quality and profitability for your greenhouse business. Exhaust supporters also functions great in workshops and structures.
Move and refresh the stagnant atmosphere in your greenhouse to make a healthier and more productive environment. These exhaust & circulating fans are excellent for plant growth. Create a cooler convenient growing environment, that may directly contribute to efficiency, quality and profitability for your greenhouse business.
The idea of cooling a greenhouse with thermal buoyancy and wind dates back to the start of controlled environment. All greenhouses constructed prior to the 1950’s experienced some kind of vents or louvers which were opened to allow the excess heat to flee and cooler outside atmosphere 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 supporters that pull outside air flow through louvers in one endwall and exhaust it out the opposite end. With thermostatic control, this was, and still is the accepted way for cooling many structures where positive air movement is needed.

Growers with hoophouses possess found that roll-up sides work very well for warm time of year ventilation. Both manual and motorized systems are available. A location with good summer time 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 reduce the Greenhouse Vent Fan quantity of rain that can drip in.

Greenhouses with roof and sidewall vents are powered by the principle that high temperature is removed by a pressure difference created by wind and temperature gradients. Wind performs the major function. In a smartly designed greenhouse, a wind speed of 2-3 kilometers/hour provides 80% or even more of the ventilation. Wind moving over the roof creates vacuum pressure and sucks the heated atmosphere out the vent. If sidewall vents are open up, cool replacement air flow 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 top of the vent.