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.

The Model 1500 "High Heat" Series Solar Air Heater is a Module Array Assembly for Commercial and Residential application. High Heat output with Patented "Step-Wise Heating Technology".

The Model 6047 Wood Frame is 60 inches wide by 47 inches tall. The 4 inch entry and exit hole in the back side of the left hand and right module assemblies.

Custom designed controller for a solar air heater. This is not a product that is purchased from your favorite home improvement center and resold on ebay.

The Model 3036 is 30 inches wide by 36 inches tall. These two Model have the 4 inch entry and exit hole in the back side of the assemblies.

This kit is complete with (2 ea.) custom 8" x 8" wall vents with washable filters, metal wall duct mounting assembly. 4 inches O.D.

Digital thermometer fan switch. Fan not included.

Left side and right side thru the wall Model 1536. Sold in pairs. Order in between modules in pairs 2,4,6,8...etc.