Move and refresh the stagnant surroundings in your greenhouse or building to make a healthier and more productive growing environment. These greenhouse exhaust fans are excellent for reducing plant and employee heat tension. Our exhaust enthusiasts provide superb 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 followers 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 excellent for plant growth. Create a cooler convenient growing environment, which can 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 managed environment. All greenhouses constructed 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 within the whole roof, placing vents on the top proved difficult. Engineers after that came up with the idea of using fans that draw 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 method for cooling 
many structures where Greenhouse Exhaust Fan positive air movement is needed.
Growers with hoophouses have discovered that roll-up sides work well for warm period ventilation. Both manual and motorized systems can be found. A spot with good summer season breezes and lots 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 lessen the quantity of rain that may drip in.
Greenhouses with roof and sidewall vents are powered by the principle that 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 swiftness of 2-3 miles/hour provides 80% or even more of the ventilation. Wind passing over the roof creates a vacuum and sucks the heated air out the vent. If sidewall vents are open up, cool replacement air 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 top of the vent.