Move and refresh the stagnant air in your greenhouse or building to make a healthier and more productive developing environment. These greenhouse exhaust supporters are great for reducing plant and worker heat stress. Our exhaust followers provide excellent ventilation for high tunnels and cold frames. Create a cooler convenient growing environment, that may directly contribute to productivity, quality and profitability for your greenhouse business. Exhaust followers also functions great in workshops 
and structures.
Move and refresh the stagnant air in your greenhouse to create a healthier and more productive environment. These exhaust & circulating fans are excellent for plant growth. Create a cooler more comfortable growing environment, which can directly contribute to productivity, quality and profitability for your greenhouse business.
The idea of cooling a greenhouse with thermal buoyancy and wind dates back to the beginning of controlled environment. All greenhouses built prior to the 1950’s acquired some form of vents or louvers which were opened to Greenhouse Exhaust Fan enable the excess heat to escape and cooler outside air to enter.
When polyethylene was developed with large sheets within the whole roof, putting vents on the roof proved difficult. Engineers after that came up with the idea of using followers that draw outside surroundings through louvers in one endwall and exhaust it out the contrary end. With thermostatic control, this is, and still is 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 time of year ventilation. Both manual and motorized systems can be found. A spot with good summertime 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 amount 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 performs the major role. In a smartly designed greenhouse, a wind swiftness of 2-3 kilometers/hour provides 80% or more of the ventilation. Wind moving 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 ground level. If the sidewall vents are closed, awesome air enters underneath of the roof vent and the heated are escapes out the top of the vent.