Move and refresh the stagnant air in your greenhouse or building to create a healthier and more productive growing environment. These greenhouse exhaust enthusiasts are excellent for reducing plant and employee heat tension. Our exhaust fans provide excellent ventilation for high tunnels and cold frames. Create a cooler convenient 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 
surroundings in your greenhouse to create a healthier and more productive environment. These exhaust & circulating fans are great for plant development. Create a cooler more comfortable 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 goes back to the start of controlled environment. All greenhouses constructed prior to the 1950’s experienced some kind of vents or louvers that were opened to enable the excess heat to flee and cooler outside surroundings to enter.
When polyethylene originated with large sheets within the whole roof, placing vents on the roof proved difficult. Engineers then came up with the concept of using fans that pull outside surroundings through louvers in one endwall and exhaust it out the opposite end. With thermostatic control, this is, and still may be the accepted method for cooling many structures where positive air movement is needed.
Growers with hoophouses have found that roll-up sides work well for warm time of year ventilation. Both manual and motorized systems are available. A location with good summer season breezes and plenty of space between houses is needed. It helps to have greenhouses made with a vertical Greenhouse Exhaust Fan sidewall up to the elevation of the attachment rail to reduce the amount of rain that may 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 plays the major part. In a smartly designed greenhouse, a wind swiftness of 2-3 miles/hour provides 80% or even more of the ventilation. Wind moving over the roof creates vacuum pressure and sucks the heated surroundings out the vent. If sidewall vents are open, cool replacement surroundings 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.