Solar Thermal Hot Air has been around a long time; think of sunshine streaming through a window on a clear winter day. Today's technology has improved this method of almost-free heat to new levels, extracting more heat than ever before and delivering it to your home, business, shop, air-drying operation or extended-season greenhouse quietly and efficiently.
We conducted extensive research on solar thermal (hot air) panels, and the SPF (Solar Powered Furnace) manufactured by Rreal in northern Minnesota are the best we've found. An innovative mounting system, well designed connectors, top quality materials and the best performance we've seen have us convinced you won't find a better panel or a better value. Installation available, call or click for more information.
We were right! After 2+ years of testing, the SPF is SRCC (Solar Rating and Certification Corporation) certified and was deemed the most efficient solar air heat panel on the market! View the report here.
Solar air heat is among the most efficient and cost competitive solar technologies in northern latitudes. The following table illustrates the fact that per unit energy, solar air heat is more cost competitive to the two solar technologies that receive the bulk of the public’s attention.
| Technology |
Conversion efficiency of sunlight to energy |
Cost per kWh produced in 1st year including all installation cost |
| Solar air heat |
35-58% |
$1.78 |
| Solar water heat |
30-60% |
$3.20 |
| Solar electricity |
6-21%
|
$8.75 |