Move and refresh the stagnant surroundings in your greenhouse or building to make a healthier and more productive growing environment. These greenhouse exhaust supporters are excellent for reducing plant and worker heat tension. Our exhaust supporters provide superb ventilation for high tunnels and cool frames. Create a cooler more comfortable growing environment, which can directly contribute to efficiency, quality and profitability for your greenhouse business. Exhaust fans 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 great for plant growth. Create a cooler convenient growing environment, that may directly contribute to efficiency, quality and profitability for your greenhouse business.
The concept of cooling a greenhouse with thermal buoyancy and wind dates back to the start of controlled environment. All greenhouses Greenhouse Vent Fan constructed prior to the 1950’s had some form of vents or louvers that were opened to allow the excess heat to flee and cooler outside air to enter.

When polyethylene originated with large sheets covering the whole roof, placing vents on the top proved difficult. Engineers after that came up with the concept of using followers that pull outside surroundings through louvers in a single endwall and exhaust it out the opposite end. With thermostatic control, this was, and still is the accepted method for cooling many structures where positive air flow movement is needed.

Growers with hoophouses possess discovered that roll-up sides work well for warm time of year ventilation. Both manual and motorized systems are available. A spot with good summertime breezes and lots of space between homes is needed. It helps to have greenhouses made with a vertical sidewall up to the height of the attachment rail to reduce the quantity of rain that may drip in.

Greenhouses with roof and sidewall vents operate on the principle that heat is removed by a pressure difference created by wind and temperature gradients. Wind plays the major part. In a well designed greenhouse, a wind velocity of 2-3 miles/hour provides 80% or 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 up, cool replacement surroundings enters and drops to the ground level. If the sidewall vents are closed, great air enters the bottom of the roof vent and the heated are escapes out the very best of the vent.