Greenhouse: Best greenhouse for the money, 1 by JimKennard

JimKennard wrote:
Dr. Jacob Mittleider, who taught me, has built these all over - in 27 countries - and he discovered that many folks don't have or can't afford electricity. He also knew from his 20 years as a nurseryman that good air movement was essential and heat rises, so he designed the greenhouse with 1/2 of the roof taller than the other, and an 18" gap between.

By putting the greenhouse plastic - or polycarbonate - depending on what you're covering it with there,attached at the top and on hinges (polycarb), it can be raised varying amounts to adjust the amount of air, and will very quickly cool a greenhouse that is getting too warm.

In very warm weather the same concept is applied to one or both side walls, to give almost total ventilation, and no heat build-up in the summer.

Jim