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Passive solar greenhouses

A solar powered greenhouse that makes sense in Canada’s climate Passive solar greenhouses are an idea whose time has come. What is a passive solar greenhouse, you ask? And don’t they already use the sun’s energy? Well yes, but with the traditional Dutch glass box greenhouse design all that heat leaves once the sun goes down. Because they are uninsulated, they don’t store any of that heat. As a result they need a lot of energy to heat the building … Read More