Passive Solar heater part 1

This is part one of a two part video on the making, installing and performance of a passive solar heater. I installed this one in my garage for testing and I'm currently building 2 more for the house. I will be testing it through out the winter and try to get you the facts on the performance. I hope you're able to learn enough to build you one. Free heat for your house is always a good thing.
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