U.S Patent 7,434,577 Canadian Patent 2,643,573
A solar window heater works by circulating air from inside a
room through the system mounted on the interior window sill.
Solar Window Heater Outside Mount
An evolution in design, Solar Window Air Heater breakthrough patented passive solar air heating shutter system looks just like a vertical house window shutter – but does something no other window shutter can do - generates heat!