Move and refresh the stagnant air flow in your greenhouse or building to create a healthier and more productive developing environment. These greenhouse exhaust supporters are excellent for reducing plant and employee heat stress. Our exhaust supporters provide superb ventilation for high tunnels and frosty frames. Create a cooler more comfortable growing environment, that may directly contribute to efficiency, quality and profitability for your greenhouse business. Exhaust supporters 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, that may directly contribute to efficiency, quality and profitability for your greenhouse business.
The concept of cooling a greenhouse with thermal buoyancy and wind dates back to the start of controlled environment. All greenhouses built just before the 1950’s had some kind of vents or louvers which were opened to allow the excess heat to escape and cooler outside air flow to enter.

When polyethylene was developed with large sheets within the whole roof, placing vents on the roof proved difficult. Engineers after that came up with the concept of using followers that draw outside atmosphere through louvers in a single endwall and exhaust it out the contrary end. With thermostatic control, this is, 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 very well for warm season ventilation. Both manual and motorized systems are available. A spot with good summertime breezes and plenty of space between houses is needed. It helps 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 performs the major part. In a well designed greenhouse, a wind rate of 2-3 miles/hour provides 80% or even more of the ventilation. Wind passing over the roof creates vacuum pressure and sucks the heated atmosphere out the vent. If sidewall vents are open up, cool replacement atmosphere Greenhouse Vent Fan enters and drops to the floor 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.