Eli5 How do gas ventless fireplaces work without electricity?

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I have a propane powered vent free fireplace in my garage. It doesn’t get plugged in anywhere and it doesn’t take batteries. I get how the peizo works to start it but how the hell does it turn the gas valve on and off by itself? When I go from pilot light to on there is a delay to when you actually hear the gas start flowing. Then it will also click and just shut itself off sometimes.

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Anonymous 0 Comments

actually a good question. this guy goes into some detail about it https://www.youtube.com/watch?v=xvFZjo5PgG0

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