Sometimes I wonder if we forget just how powerful (and useful) the sun can be. Sure, we take it for granted most of the time, complain when we get a sunburn, and fear a coronal mass ejection event (CME), but we need to remember that the sun can do so much for us as preppers. Today, I’m reminded that it can heat water for free! Although I’d originally watched this video on a much-too-complicated solar water heating project, I later watched the following videos by a YouTuber that I’ve watched many times in the past. In fact, I’d seen the first video below before and have even tried it with some success. Enjoy!
And here’s two variations of his solar air heaters as a mostly passive option for small space heating, no cans needed!
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