Using a Propane Heater in a Car [Worth the Risk?]

Is using a propane heater in a car possible? Is it safe? Here are the answers you seek, plus alternative heating methods for nomads & campers!
If you sleep in a vehicle on a regular basis - or just go camping a few times per year - you’ve probably thought about using a propane heater in a car before. There are only a limited amount of ways to stay warm in a vehicle during the colder months, and all of them have pros & cons. This includes propane heaters. I’m going to lay out all of the options including the good, bad & ugly, so that you’re well-informed and can be best prepared once the weather starts getting frigid. Let’s dive in!

Flame King FK-AD010CGA Multi-Use Portable Propane Heater/Cooker 15,000 BTU for Camping, Ice Fishing, and Backpacking Trips, Silver

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Stupid question. Does anyone run their propane heater on natural gas? If so, how should I go about doing it? : r/Dewalt

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Just a friendly reminder to never leave propane heaters unattended. Even worse, leaving them unattended directly hooked up to a propane tank. I tried to rescue his two dogs but they were