Move and refresh the stagnant atmosphere in your greenhouse or building to make a healthier and more productive growing environment. These greenhouse exhaust followers are great for reducing plant and employee heat tension. Our exhaust supporters provide exceptional Greenhouse Exhaust Fan ventilation for high tunnels and cold frames. Create a cooler convenient growing environment, which can directly contribute to productivity, quality and profitability for your greenhouse business. Exhaust enthusiasts also functions 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 great for plant growth. Create a cooler convenient growing environment, that may 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 beginning of controlled environment. All greenhouses constructed prior to the 1950’s acquired some form of vents or louvers which were opened to allow 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 then came up with the concept of using fans that draw outside air flow 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 surroundings 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 time 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 can 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 performs the major function. In a smartly designed greenhouse, a wind swiftness of 2-3 kilometers/hour provides 80% or even more of the ventilation. Wind passing over the roof creates vacuum pressure and sucks the heated surroundings out the vent. If sidewall vents are open, cool replacement surroundings enters and drops to the ground level. If the sidewall vents are closed, great air enters the bottom of the roof vent and the heated are escapes out the very best of the vent.