If you're home during the day and own a home or rent an apartment with south facing exposure you should consider a solar window space heater.
Not only can you harness the radiant energy of the sun to heat entire rooms, but once it's in place you'll be getting free heat for as long as the sun shines.
If you’ve never seen a solar window heater it can be described as a 3’ x 2’ box, 4 or 5 inches
Solar Window Space Heaters
10.23
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