Well this is an interesting idea, transforming an ammo box, mason jar (not necessary), some copper coil, and a few odds and ends into a DIY heater using the principles of thermal siphoning. After some trial and error he got the portable heater to work great!
Use it to heat water passively or as a small space heater like he plans on doing. And please keep your safety in mind when working with items in ways they weren’t intended…
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