Greenhouse Cooling Basics: Keeping a greenhouse, or sunroom, cool is a balance between ventilation, misting and shade cloth, in the hotter months. Ventilation via operable vents may “sometimes” provide proper ventilation in a “pre-engineered and manufactured greenhouse”, but seldom will one achieve success in a site built structure. Add an exhaust fan and inlet shutters/dampers to effectively move air. Select a 2 speed fan so it starts slow, eliminating strong blasts of cold air. Place fan high and shutters low. For sunrooms a 110 Volt Fan-Tastic Vent Fan can be installed on the wall or on a roof. Simply cut a 14″x14″ hole in the polycarbonate, place a 2×2 wood frame on the inside and install the fan.
Also add a misting system. The mist is good for your plants and will dramatically assist in the cooling process. Jaybird Mfg Misting Equipment makes simple to install and high quality units. Do this and you should only need to add shade cloth when it starts to get hot. Keep it simple and effective.
Search Google for Greenhouse Exhaust Fans Many sites offer education, tech support and equipment.
• What about sliding roof vents for pool enclosures? No, we recommend sliding glass doors on the walls and a large exhaust fan.
Heating Questions & Options:
• Do you sell heaters? No, visit Southern Burner Company for small greenhouse heaters. Search the web for other size heaters.