Sun-Lite solar airheater kit: you assemble the components and cut either circular or rectangular duct holes. The airheater can be used in passive thermosyphon mode or you can circulate the air with a small fan and thermostat.
DIY plans to build an inexpensive solar heating panel.
Sun-Lite solar airheater kit: you assemble the components and cut either circular or rectangular duct holes. The airheater can be used in passive thermosyphon mode or you can circulate the air with a small fan and thermostat.
DIY plans to build an inexpensive solar heating panel.