his varies greatly by location, and what you are trying to grow. In areas with mild winters, passive solar greenhouses can grow year-round without any back-up heating. However, to grow a wider variety of crops, in most cold climates an energy-efficient greenhouse will require some back-up heating. This is usually turned on during a few very cold nights a year — the extreme cold snaps — when a GAHTTM system.
Our innovative geothermal Ecoloop System can provide all of the heating, cooling, and dehumidification for your greenhouse. Please contact us for more information on the Ecoloop.