SunMate Hot Air Solar Panel

The SunMate mounts vertically on the side of a home or building; it circulates cool room air through a solar absorber plate, and then sends it back inside, warmed. A thermostat turns on a small, 7-watt circulating fan in the system when the absorber plate heats up to 110 degrees Fahrenheit, and turns it back off again when that temperature gets down to 90 degrees Fahrenheit. One panel will heat up to 300 square feet, and multiple panels can be installed in parallel. The insulated, single-piece units, made with stainless steel and aluminum components and sealed solar glass, are long-lived and require almost no maintenance.

Environmental Solar Systems; Methuen, MA. www.environmentalsolarsystems.com; phone 978-975-1190.