Move and refresh the stagnant surroundings in your greenhouse or building to make a healthier and more productive developing environment. These greenhouse exhaust fans are great for reducing plant and employee heat tension. Our exhaust supporters provide excellent ventilation for high tunnels and chilly frames. Create a cooler more comfortable growing environment, that may directly contribute to efficiency, quality and profitability for your greenhouse business. Exhaust enthusiasts also functions great in workshops and buildings.
Move and refresh the stagnant air in your greenhouse to create a healthier and more productive environment. These exhaust & circulating fans are excellent for plant development. Create a cooler convenient 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 goes back to the start of managed environment. All greenhouses built prior to the 1950’s got some type of vents or louvers which were opened to allow the excess heat to flee and cooler outside air flow to enter.
When polyethylene was developed with large sheets covering the whole roof, placing vents on the roof proved difficult. Engineers then came up with the concept of using followers that attract outside surroundings through louvers in one endwall and exhaust it out the opposite end. With thermostatic control, this is, and still is the accepted way for cooling many structures where positive atmosphere movement is needed.
Growers with hoophouses have discovered that roll-up sides work well for warm time of year ventilation. Both manual and motorized systems can be found. A spot with good summer season breezes and plenty of space between homes is needed. It can help to have greenhouses designed with a vertical sidewall up to the elevation of the attachment rail to reduce the amount of rain that can drip in.
Greenhouses with roof and sidewall vents operate on the principle that warmth is removed by a pressure difference created by wind and Greenhouse Vent Fan temperature gradients. Wind performs the major part. In a smartly designed greenhouse, a wind speed of 2-3 miles/hour provides 80% or even more of the ventilation. Wind moving over the roof creates a vacuum and sucks the heated atmosphere out the vent. If sidewall vents are open up, cool replacement surroundings enters and drops to the ground level. If the sidewall 
vents are closed, awesome air enters underneath of the roof vent and the heated are escapes out the very best of the vent.