Picture of Solar Space Heater
The purpose of this solar heater is to concentrate heat from the sun on a black surface and radiate it into the room. It fits around/onto a window and can serve as an indirect fix for poorly-insulated windows. Ideally, the window will be south-facing in order to catch the most amount of winter sun. This project is designed for a 6x2 foot window, but measurements can be adjusted accordingly.

Materials needed:
Two six-foot 2x4’s
One sheet of ¼ inch plywood (in our case it was 44x72 inches)
2 yards of black felt, 2 feet across (or fit to window)
Japanese saw
Tape measure
Wooden molding (½ in.)

Step 1: Making the frame

Picture of Making the frame
In our case, the window was 6x2ft. 

Cut a 2ft. portion from one of the 2x4’s for the base of the heater

Cut 4 inches from the other 2x4 then cut in half (keeping in mind that 2 inches on each side of the frame will be comprised of the 2x4 laying across the bottom of the frame)

xsquid4 years ago
That's very clever, and perfect for the sub-tropic region I live in..we do get the occasional cold spell in winter. Thanks!
lemonie4 years ago
Image 1 gets cropped to a black square for the thumbnail, have you a different picture?