Move and refresh the stagnant air in your greenhouse or building to make a healthier and more productive developing environment. These greenhouse exhaust fans are excellent for reducing plant and employee heat stress. Our exhaust fans provide exceptional ventilation for high tunnels and frosty frames. Create a cooler convenient growing environment, which can directly contribute to efficiency, quality and profitability for your greenhouse business. Exhaust followers also functions great in workshops and structures.
Move and refresh the stagnant air flow in your greenhouse to make a healthier and more productive environment. These exhaust & circulating fans are excellent for plant development. Create a cooler more comfortable 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 goes back to the beginning of controlled environment. All greenhouses constructed prior to the 1950’s experienced some type of vents or louvers which were opened to enable the excess heat to flee and cooler outside air flow to enter.
When polyethylene originated with large sheets covering the whole roof, placing vents on the roof proved difficult. Engineers then came up with the concept of using followers that pull outside air through louvers in a single endwall and exhaust it out the contrary end. With thermostatic control, this was, and still is the accepted way for cooling many structures where positive air flow movement is needed.
Growers with hoophouses possess discovered that roll-up sides work well for warm period ventilation. Both manual and motorized systems are available. A location with good summer breezes and plenty of space between homes is needed. It can help to have greenhouses designed with a vertical sidewall up to the height of the attachment rail to reduce the quantity of rain that can drip in.
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