Move and refresh the stagnant air flow in your greenhouse or building to make a healthier and more productive developing environment. These greenhouse exhaust followers are great for reducing plant and employee heat stress. Our exhaust followers provide superb ventilation for high tunnels and cool frames. Create a cooler more comfortable growing environment, which can 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 goes back to the beginning of managed environment. All greenhouses constructed just before the 1950’s got some kind of vents or louvers which were opened to enable the excess heat to escape and cooler Greenhouse Vent Fan outside air flow to enter.
When polyethylene originated with large sheets covering the whole roof, placing vents on the top proved difficult. Engineers after that came up with the concept of using followers 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 well for warm time of year ventilation. Both manual and motorized systems are available. A spot with good summer time 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 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 role. In a well designed greenhouse, a wind rate of 2-3 miles/hour provides 80% or more of the ventilation. Wind moving over the roof 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 very best of the vent.