Cold Frame Greenhouse - Maximize The Natural Warmth Of The Sun
A cold greenhouse is not warmed by a heating device. The environment is warmer than the outside - this is due to the heat of the sun’s rays being trapped inside the covering material - be it glass or plastic - during the warm season, and heat accumulated in the soil being released back into the greenhouse during the fall.
In summer, cool air enters the greenhouse through side ventilators near the base of the wall, keeping a steady stream of fresh air flowing around the plants.













