Reply #31: I used a passive solar air heater to provide home heat [View All]

[GumboYaYa]

last winter. It cost us about sixty dolars in materials; we used lots of recycled materials to hold down cost and to recycle. We are now designing an expanded system to provide more of our heat. Together with a high efficiency home fireplace insert that we are installing, we hope to use virtually no gas to heat the house this winter.

Solar thermal is very inexpensinve, can use many existing materials to produce, and has an almost immediate economic payback.