Move and refresh the stagnant air flow in your greenhouse or building to create a healthier and more productive developing environment. These greenhouse exhaust followers are excellent for reducing plant and employee heat stress. Our exhaust enthusiasts provide exceptional ventilation for high tunnels and frosty frames. Create a cooler more comfortable growing environment, that may directly contribute to productivity, quality and profitability for your greenhouse business. Exhaust fans 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 great for plant development. Create a cooler more comfortable growing environment, which can 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 managed environment. All greenhouses constructed prior to the 1950’s got some kind of vents or louvers that were opened to enable the excess heat to escape and cooler outside air flow to enter.
When polyethylene originated 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 draw outside air flow through louvers in a single endwall and exhaust it out the contrary 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 roll-up sides work very well for warm period ventilation. Both manual and motorized systems are available. A spot 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 amount 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 role. In a smartly designed greenhouse, a wind swiftness of 2-3 miles/hour provides 80% or more of the ventilation. Wind passing over the roof Greenhouse Vent Fan creates vacuum pressure and sucks the heated air flow out the vent. If sidewall vents are open up, cool replacement surroundings 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 top of the vent.