Used to rely on propane heaters in my tent, but moisture and smell were always an issue. When I switched to a portable diesel heater, nights got way more comfortable. The trick is venting always keep the exhaust completely outside and never block air inlets. These units burn cleanly when maintained well, so no fumes build up. I also keep a CO detector nearby for peace of mind. Once it’s set right, the warmth is steady, quiet, and way more fuel-efficient than I expected.