Move and refresh the stagnant atmosphere in your greenhouse or building to create 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 more comfortable 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 create a healthier and more productive environment. These exhaust & circulating fans are excellent 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 allow the excess heat to flee and cooler outside air to enter.
When polyethylene originated with large sheets within the whole roof, putting vents on the top proved difficult. Engineers then came up with the idea of using supporters that pull outside surroundings through louvers in one endwall and exhaust it out the opposite end. With thermostatic control, this is, and still may be the accepted way for cooling many structures where positive surroundings movement is Greenhouse Exhaust Fan needed.
Growers with hoophouses possess found that roll-up sides work well for warm period ventilation. Both manual and motorized systems can be found. A location with good summertime breezes and lots of space between houses is needed. It helps to have greenhouses made with a vertical sidewall up to the elevation of the attachment rail to lessen the quantity of rain that can drip in.
Greenhouses with roof 
and sidewall vents are powered by the principle that warmth is removed by a pressure difference created by wind and temperature gradients. Wind performs the major function. In a smartly designed greenhouse, a wind speed of 2-3 kilometers/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, cool air enters the bottom of the roof vent and the heated are escapes out the top of the vent.
