The Do It Yourself Passive Solar Window Heater

How to make a free passive solar window heater. Get free heat from the sun. With no moving parts to wear out, this homemade heater can last a lifetime. With no other source of heat, on a sunny winter day, the inside of my 32 foot trailer can be 20 degrees or more warmer than outside. On a 39 degree sunny day, it is usually in the 50s or 60s inside. In the 40s outside and it is in the 60s easily inside.

This little homemade heater can be put together in just a few minutes and you can immediately start to benefit from the free heat.

For instructions and full plans, see
http://www.thediyworld.com/DIY-Passive-Solar-Heating-Projects.html