Move and refresh the stagnant atmosphere in your greenhouse or building to make a healthier and more productive growing environment. These greenhouse exhaust followers are excellent for reducing plant and employee heat tension. Our exhaust followers provide exceptional ventilation for high tunnels and chilly frames. Create a cooler more comfortable growing environment, which can directly contribute to efficiency, quality and profitability for your greenhouse business. Exhaust followers 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 excellent for plant development. Create a cooler convenient growing environment, which can directly contribute to productivity, quality and profitability for your greenhouse business.
The idea of cooling a greenhouse with thermal buoyancy and wind goes back to the beginning of managed environment. All greenhouses built just before the 1950’s experienced some type of vents or louvers which were opened to enable the excess heat to flee and cooler outside air flow to enter.

When polyethylene was developed with large sheets within the whole roof, placing 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 opposite end. With thermostatic control, this is, and still is the accepted method for cooling many structures where positive atmosphere movement is needed.

Growers with hoophouses possess found that roll-up sides work well for warm time of year ventilation. Both manual and motorized Greenhouse Vent Fan systems are available. A spot with good summertime breezes and lots of space between homes is needed. It can help to have greenhouses made with a vertical sidewall up to the elevation 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 warmth is removed by a pressure difference created by wind and 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 passing over the roof creates a vacuum and sucks the heated surroundings out the vent. If sidewall vents are open, cool replacement air flow enters and drops to the ground 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.