I purchased a Propex heater for the coming build. I really wanted to know how warm the housing got and how noisy it was.
It was 35º outside and was putting out heat at 180ºF. I can't imagine that it will take more than about five minutes to preheat the teardrop.
The housing stayed cool to the touch. (Propex says it needs 1" of clearance.) I tried it with and without a cheap $12 muffler I got off eBay. Without the muffler, it kinda sounds like a dog's low growl. The growl goes away with the muffler. Maybe I'll leave the muffler off where grizzlies make things go bump in the night
The fan makes noise but the unit will be installed behind the bulkhead in the galley and I'll be purchasing noise reducing ducting from Westy-Ventures.
Heat, it's a good thing. And I think these are damn good heaters.
Tony