Move and refresh the stagnant atmosphere in your greenhouse or building to make a healthier and more productive developing environment. These greenhouse exhaust enthusiasts are excellent for reducing plant and employee heat stress. Our exhaust enthusiasts 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 supporters also functions great in workshops and structures.
Move and refresh the stagnant air in your greenhouse to make a healthier and more productive environment. These exhaust & circulating fans are excellent for plant development. Create a cooler convenient 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 goes back to the beginning of controlled environment. All greenhouses built just before the 1950’s had some kind of vents or louvers which were opened to enable the excess heat to escape and cooler outside surroundings to enter.

When polyethylene originated with large sheets covering the whole roof, placing vents on the roof proved difficult. Engineers then came up with the concept of using fans that draw outside air through louvers in a single endwall and exhaust it out the opposite end. With thermostatic control, this is, and still is the accepted method for cooling many structures where positive air flow movement is needed.

Growers with hoophouses possess found that Greenhouse Exhaust Fan roll-up sides work very well for warm season ventilation. Both manual and motorized systems can be found. A location with good summer season breezes and lots of space between homes is needed. It can help 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 heat is removed by a pressure difference created by wind and temperature gradients. Wind performs the major function. In a smartly designed greenhouse, a wind rate of 2-3 kilometers/hour provides 80% or even 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 the bottom of the roof vent and the heated are escapes out the top of the vent.