Move and refresh the stagnant air flow in your greenhouse or building to create a healthier and more productive developing environment. These greenhouse exhaust enthusiasts are excellent for reducing plant and employee heat tension. Our exhaust followers provide superb ventilation for high tunnels and cool frames. Create a cooler convenient growing environment, which can 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 flow in your greenhouse to make a healthier and more productive environment. These exhaust & circulating fans are great for plant growth. Create a cooler more comfortable growing environment, that may directly contribute to productivity, quality and profitability for your greenhouse business.
The idea of cooling a greenhouse with thermal buoyancy and wind dates back to the start of managed environment. All greenhouses constructed just before the 1950’s got some type 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 covering the whole roof, putting vents on the roof proved difficult. Engineers after that came up with the concept of using fans that draw outside air flow through louvers in one endwall and exhaust it out the contrary end. With thermostatic control, this was, and still may be the accepted way for cooling many structures where positive atmosphere movement is needed.

Growers with hoophouses possess discovered that roll-up sides work well for warm season ventilation. Both manual and motorized systems are available. A spot with good summer time breezes and plenty of space between houses is needed. It can help to have greenhouses designed with a vertical sidewall up to the height of the attachment rail to lessen the amount of rain that may drip in.

Greenhouses with roof and sidewall vents are powered by the principle that temperature is removed by a pressure difference created by wind and temperature gradients. Wind performs the major role. In a well designed greenhouse, a wind Greenhouse Vent Fan velocity of 2-3 kilometers/hour provides 80% or more of the ventilation. Wind passing over the roof creates a vacuum and sucks the heated atmosphere 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, cool air enters the bottom of the roof vent and the heated are escapes out the very best of the vent.