I came across a question the other day regarding on how a sustainable heat source works.
By that I mean something that can heat up to a maximum of 200 degrees/392 Fahrenheit and is controllable with a regulator. How does it stay on the desired temperature? What components make it work? I am very curious, because I don´t want to open anything in order to look at it because I wouldn´t get it anyways, so I thought someone here could maybe explain my questions and how those things work.
Thanks in advance!
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