Move and refresh the stagnant atmosphere 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 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 followers also functions great in workshops and structures.
Move and refresh the stagnant surroundings in your greenhouse to create a healthier and more productive environment. These exhaust & circulating fans are great for plant growth. Create a cooler more comfortable 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 start of controlled environment. All greenhouses built prior to the 1950’s experienced some form of vents or louvers that were opened to enable the excess heat to escape and cooler outside surroundings to enter.

When polyethylene was developed with large sheets within the whole roof, putting vents on the top proved difficult. Engineers after that came up with the idea of using supporters that draw outside atmosphere through louvers in one endwall and exhaust it out the Greenhouse Exhaust Fan opposite end. With thermostatic control, this was, and still is the accepted method for cooling many structures where positive atmosphere movement is needed.

Growers with hoophouses have discovered that roll-up sides work very well for warm period ventilation. Both manual and motorized systems are available. A location with good summer time breezes and plenty 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 reduce the amount of rain that may 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 swiftness of 2-3 kilometers/hour provides 80% or even more of the ventilation. Wind passing over the roof creates a vacuum 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, awesome air enters the bottom of the roof vent and the heated are escapes out the very best of the vent.