Move and refresh the stagnant atmosphere in your greenhouse or building to make a healthier and more productive developing environment. These greenhouse exhaust supporters are great for reducing plant and employee heat stress. Our exhaust enthusiasts provide superb ventilation for high tunnels and cold frames. Create a cooler convenient growing environment, that may directly contribute to productivity, quality and Greenhouse Vent Fan profitability for your greenhouse business. Exhaust supporters also functions great in workshops and buildings.
Move and refresh the stagnant air flow in your greenhouse to make a healthier and more productive environment. These exhaust & circulating fans are great for plant development. Create a cooler convenient 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 just before the 1950’s experienced some kind of vents or louvers that were opened to enable the excess heat to escape and cooler outside air to enter.
When polyethylene originated with large sheets within the whole roof, placing vents on the top proved difficult. Engineers then came up with the idea of using enthusiasts that pull outside surroundings through louvers in one endwall and exhaust it out the contrary end. With thermostatic control, this was, and still may be the accepted method for cooling many structures where positive atmosphere movement is needed.
Growers with hoophouses possess discovered that roll-up sides work very well for warm season ventilation. Both manual and motorized systems are available. A location with good summer time breezes and plenty of space between homes is needed. It can help to have greenhouses designed with a vertical sidewall up to the elevation of the attachment rail to lessen the quantity of rain that can 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 plays the major part. In a well designed greenhouse, a wind quickness of 2-3 kilometers/hour provides 80% or even more of the ventilation. Wind moving over the roof creates vacuum pressure and sucks the heated atmosphere out the vent. If sidewall vents are open up, cool replacement air enters and drops to the ground level. If the sidewall vents are closed, great air enters underneath of the roof vent and the heated are escapes out the top of the vent.