Move and refresh the stagnant air flow in your greenhouse or building to create a healthier and more productive growing environment. These greenhouse exhaust supporters are great for reducing plant and employee heat stress. Our exhaust followers provide excellent ventilation for high tunnels and chilly frames. Create a cooler more comfortable growing environment, which can directly contribute to efficiency, quality and profitability for your greenhouse business. Exhaust followers also works great in workshops and buildings.
Move and refresh the stagnant atmosphere 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, that may 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 beginning of managed environment. All Greenhouse Vent Fan Greenhouses constructed prior to the 1950’s experienced some form of vents or louvers which were opened to allow the excess heat to escape 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 idea 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 possess found that roll-up sides work well for warm season ventilation. Both manual and motorized systems can be found. A spot with good summer season breezes and lots of space between houses is needed. It can help to have greenhouses made with a vertical sidewall up to the height of the attachment rail to reduce the quantity of rain that can drip in.

Greenhouses with roof and sidewall vents operate on the principle that temperature is removed by a pressure difference created by wind and temperature gradients. Wind performs the major role. In a smartly designed greenhouse, a wind velocity of 2-3 kilometers/hour provides 80% or 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 flow 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 very best of the vent.