Move and refresh the stagnant air 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 tension. Our exhaust followers provide excellent ventilation for high tunnels and chilly frames. Create a cooler convenient growing environment, that may directly contribute to productivity, 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 more comfortable growing environment, which can directly contribute to productivity, quality and profitability for your greenhouse business.
The concept of cooling a greenhouse with thermal buoyancy and wind dates back to the start of managed environment. All greenhouses built 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 air flow to enter.

When polyethylene was developed with large sheets within the whole roof, Greenhouse Vent Fan putting vents on the top proved difficult. Engineers after that 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 is the accepted way for cooling many structures where positive surroundings movement is needed.

Growers with hoophouses have discovered that roll-up sides work well for warm period ventilation. Both manual and motorized systems can be found. A location with good summer breezes and plenty of space between homes is needed. It helps to have greenhouses designed with a vertical sidewall up to the elevation 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 temperature is removed by a pressure difference created by wind and temperature gradients. Wind performs the major function. In a smartly designed greenhouse, a wind speed 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 atmosphere out the vent. If sidewall vents are open up, cool replacement air enters and drops to the floor level. If the sidewall vents are closed, cool air enters underneath of the roof vent and the heated are escapes out the very best of the vent.