Make A Passive Solar Window Heater For Under Two Bucks

You can make a passive solar window heater with materials you may have laying around the house. Read the full details: http://www.theoffgridproject.com/How-To-Make-A-Passive-Solar-Window-Heater.php

This project is so simple a child can make it. It has no moving parts and works on its own.

Harness the energy of the sun to heat your home for free.

This is a simple cardboard and aluminum passive solar window heater that actually works.

The Off Grid Project
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