The GAHT® (ground to air heat transfer) System is a patented solution that stores passive solar heat in a greenhouses’ soil in the winter and cold swing months (Oct/Nov/March/April), acting like an earth battery.

It works by taking the free heat generated by the sun inside the greenhouse on even the coldest days and bringing that heated air into the soil of the greenhouse during the day using a thermostat-controlled small 3W fan and irrigation piping that is buried in the soil to efficiently distribute the heat. This stored heat then rises up through the soil at night to keep the plant roots warm, and slowly the whole greenhouse gets back this heat to minimize the need for a secondary backup heater and the energy costs associated with using that heater.

For the Sunglo greenhouses’ GAHT® Lite that comes with the Winter Package, the piping is installed in a U-shaped raised bed (see graphic) so no significant digging is required.  GAHT Lite will help the greenhouse stay warm in the winter at a lower cost than a greenhouse without a GAHT system. Actual results will vary by location, amount of winter sun, temperature’s your winter plants require, etc…

As mentioned, even a GAHT heated greenhouse requires a backup heater for those extremely cold days with minimal sun. The backup heater we include with the winter package for a Sunglo Greenhouse is a thermostat controlled Infrared Heater. This unique heater heats the plants, not the air, so it is much more efficient than a standard electric heater that needs to heat the air of the whole greenhouse and much safer than a heater that burns propane, kerosene, etc…

As you see, no other backyard greenhouse compares to a Sunglo.

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