Move and refresh the stagnant atmosphere in your greenhouse or building to create a healthier and more productive growing environment. These greenhouse exhaust followers are excellent for reducing plant and employee heat stress. Our exhaust enthusiasts provide exceptional ventilation for high tunnels and chilly frames. Create a cooler convenient growing environment, which can directly contribute to efficiency, quality and profitability for your greenhouse business. Exhaust fans also functions great in workshops and buildings.
Move and refresh the stagnant air flow 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 controlled environment. All greenhouses constructed just before the 1950’s got some kind of vents or louvers 
that were opened to allow the excess heat to flee and cooler outside surroundings to enter.
When polyethylene originated with large sheets covering the whole roof, putting vents on the roof proved difficult. Engineers after that came up with the idea of using enthusiasts that draw outside surroundings 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 atmosphere movement is needed.
Growers with hoophouses have discovered that roll-up sides work very well for warm season ventilation. Both manual and motorized systems can be found. A location with good summer season breezes and plenty 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 lessen the quantity of rain that may drip in.
Greenhouses with roof and sidewall vents are Greenhouse Exhaust Fan powered by the principle that temperature is removed by a pressure difference created by wind and temperature gradients. Wind plays the major function. In a smartly designed greenhouse, a wind rate of 2-3 kilometers/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, cool replacement surroundings enters and drops to the ground level. If the sidewall vents are closed, cool air enters underneath of the roof vent and the heated are escapes out the top of the vent.