Free Heat From An Old Window And Some Soda Cans.

From the page: "quite a lot of work, but totally worth it in the end to know that I built a source of free heat that actually works!"

Reviewed by speeva Jul 14, 12:01am ( 55 reviews ) • ecotechdaily.com

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Rated by CajunChefRyan on Oct 30, 5:33am

Great way to heat from solar tech design!
Rated by alice44 on Sep 26, 11:56am

This is the kind of invention that is going to be part of the solution.
Rated by fredzena on Sep 26, 3:20am

Living in a cold sunny climate I'm sure I could find some practical application for this too.
Rated by mountainman3266 on Sep 20, 7:27pm

going to try this on the greenhouse
Rated by dayrider on Sep 17, 3:36am

A useful project for the family to make for themselves....
Rated by MaddSeaCow on Jul 14, 8:45pm

This solar heater would be the only heater I would need to survive a Texas winter. If only there was something equally cheap and effective to cool a single room during the summer months.
Rated by speeva on Jul 14, 12:01am

From the page: "quite a lot of work, but totally worth it in the end to know that I built a source of free heat that actually works!"

Installing is Easy!