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DIY Passive Solar Window Heater That Actually Works

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This is a very simple and inexpensive project. There are many passive solar heating projects out there, but we must admit, we were very skeptical at first. In the cold November mornings, what help can a simple bit of styrofoam and aluminum foil really provide? So we decided to make one and see how well it works.

This is a very simple project using a couple pieces of Styrofoam and some normal kitchen aluminum foil. And a can of black spray paint. The idea was also not to block out the window fully, so the heater was made a bit smaller than the window. This allows a little bit of a view and allows some sunlight to enter the room. If you want, you can fill the window completely with the foam and have even better performance. See the full tutorial below:

DIY Passive Solar Window Heater That Actually Works

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