FREE Heat – How To Build A Solar Heater Window Unit



FREE Heat – How To Build A Solar Heater Window Unit
Build this window heater that uses the suns energy to heat your home or garage in the winter. No more drilling holes through the wall or rigging power hungry fans to blow air through your solar heater. This heater uses a thermosiphon effect to pull in room temperature (cold) air as it expels hot air into the room.

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