Our climate is changing so it is ever more important to manage heating and cooling in your home. This passive heater will save you money, too!

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.