Move and refresh the stagnant surroundings in your greenhouse or building to create a healthier and more productive developing environment. These greenhouse exhaust fans are excellent for reducing plant and employee heat tension. Our exhaust fans provide exceptional ventilation for high tunnels and chilly frames. Create a cooler convenient growing environment, which can directly contribute to productivity, quality and profitability for your greenhouse business. Exhaust fans also works great in workshops and structures.
Move and refresh the stagnant air in your greenhouse to create 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 had some kind of vents or louvers which were opened to enable the excess heat to escape and cooler outside atmosphere to enter.

When polyethylene was developed with large sheets within the whole roof, placing vents on the roof proved difficult. Engineers then came up with the idea of using enthusiasts that attract outside surroundings through louvers in one endwall and exhaust it out the opposite end. With Greenhouse Vent Fan thermostatic control, this is, and still is 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 season ventilation. Both manual and motorized systems can be found. A spot with good summertime breezes and plenty of space between houses is needed. It can help to have greenhouses designed with a vertical sidewall up to the elevation of the attachment rail to reduce the quantity of rain that can 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 plays the major function. In a smartly designed greenhouse, a wind velocity of 2-3 kilometers/hour provides 80% or more of the ventilation. Wind moving over the roof creates vacuum pressure and sucks the heated air out the vent. If sidewall vents are open, cool replacement atmosphere enters and drops to the floor 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.