Move and refresh the stagnant air in your greenhouse or building to create a healthier and more productive growing environment. These greenhouse exhaust fans are great for reducing plant and worker heat stress. Our exhaust supporters provide excellent ventilation for high tunnels and cool frames. Create a cooler convenient growing environment, which can 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 air 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, which can directly contribute to productivity, quality and profitability for your greenhouse business.
The concept of cooling a greenhouse with thermal buoyancy and wind goes back to the start of controlled environment. All greenhouses built just before the 1950’s experienced some kind of vents or louvers that were opened to allow the excess heat to escape and cooler outside air flow to enter.
When polyethylene 
was developed with large sheets covering the whole roof, placing vents on the top proved difficult. Engineers after that came up with the concept of using supporters that attract outside air through louvers in a single endwall and exhaust it out the contrary end. With thermostatic control, this was, and still may be the accepted way for cooling many structures where positive air flow movement is needed.
Growers with hoophouses have discovered 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 lots of space between houses is needed. It helps 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.
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