Move and refresh the stagnant air flow in your Greenhouse Exhaust Fan greenhouse or building to make a healthier and more productive developing environment. These greenhouse exhaust supporters are excellent for reducing plant and worker heat tension. Our exhaust supporters provide excellent ventilation for high tunnels and frosty frames. Create a cooler more comfortable growing environment, that may directly contribute to efficiency, quality and profitability for your greenhouse business. Exhaust supporters also functions great in workshops and buildings.
Move and refresh the stagnant atmosphere in your greenhouse to make a healthier and more productive environment. These exhaust & circulating fans are great for plant growth. Create a cooler convenient growing environment, that may 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 managed environment. All greenhouses constructed just before the 1950’s acquired some type of vents or louvers which were opened to enable the excess heat to escape and cooler outside atmosphere to enter.
When polyethylene originated with large sheets covering the whole roof, putting vents on the top proved difficult. Engineers then came up with the idea of using fans that pull outside surroundings through louvers in one endwall and exhaust it out the opposite end. With thermostatic control, this was, and still may be the accepted method for cooling many structures where positive air flow movement is needed.
Growers with hoophouses possess discovered that roll-up sides work very well for warm period ventilation. Both manual and motorized systems can be found. A spot with good summer breezes and plenty of space between houses is needed. It helps to have greenhouses designed with a vertical sidewall up to the height of the attachment rail to lessen the quantity 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 kilometers/hour provides 80% or even more of the ventilation. Wind moving over the roof creates vacuum pressure and sucks the heated surroundings out the vent. If sidewall vents are open, cool replacement air 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.