Is it safe to run a camp stove or fuel lantern inside a closed tent?

No. It can fill the tent with carbon monoxide.

  1. No, it can cause carbon monoxide poisoning ✔
  2. Yes, if the door is zipped shut
  3. Yes, propane makes no fumes

Why: Fuel-burning stoves, heaters and lanterns make carbon monoxide, a gas you can't see or smell. The CPSC warns never to use fuel-burning heaters or lanterns while sleeping in tents, campers or vehicles.

Huh, didn't know that: The CPSC says the carbon monoxide risk is even higher at high altitudes.

The dad joke
Why did the camp stove stay outside? It didn't want to be a fuel in the tent.
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Sources

  1. CPSC: Portable Heaters and Camping Equipment (Carbon Monoxide) https://www.cpsc.gov/Safety-Education/Safety-Education-Centers/Carbon-Monoxide-Information-Center/Portable-Heaters--Camping-Equipment

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