Move and refresh the Greenhouse Exhaust Fan stagnant air in your greenhouse or building to make a healthier and more productive growing environment. These greenhouse exhaust fans are great for reducing plant and employee 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 efficiency, quality and profitability for your greenhouse business. Exhaust enthusiasts also functions great in workshops and buildings.
Move and refresh the stagnant surroundings 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 concept of cooling a greenhouse with thermal buoyancy and wind dates back to the start of managed environment. All greenhouses constructed just before the 1950’s had some type of vents or louvers that were opened to enable the excess heat to flee and cooler outside surroundings to enter.

When polyethylene was developed with large sheets within the whole roof, putting vents on the top proved difficult. Engineers after that came up with the concept of using enthusiasts that attract outside air 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 air movement is needed.

Growers with hoophouses possess found that roll-up sides work well for warm time of year ventilation. Both manual and motorized systems are available. A spot with good summer breezes and plenty of space between houses is needed. It helps to have greenhouses made with a vertical sidewall up to the height 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 high temperature is removed by a pressure difference created by wind and temperature gradients. Wind plays the major role. In a smartly designed greenhouse, a wind acceleration of 2-3 miles/hour provides 80% or even more of the ventilation. Wind moving over the roof creates a vacuum and sucks the heated atmosphere out the vent. If sidewall vents are open up, cool replacement atmosphere enters and drops to the ground 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.