This ain't your typical greenhouse design. With an insulated back wall and an insulated roof the Groundswell Community Network's passive solar community greenhouse stores heat far better than your typical glass box. They also have a bunch of other systems in play which make this building a model for what can be done with a greenhouse in a cold, sunny climate. Learn all about it at http://www.greenenergyfutures.ca/episode/73-passive-solar-greenhouses
