Mr. Heater Buddy is supposedly safe now?

The only problem that I foresee is if the seal around where the cylinder screws onto the adapter.
I have a Big Buddy Heater that I use in a shanty when I am camping out on the ice. I have the adapter for the hose and set the bottle outside of the shanty.
There is enough air moving through the cracks between the plywood floor and the canvas that carbon dioxide wouldn`t be a problem.
They do have a lot of safety features with a tip switch in case the heater tips over, it then shuts down the burner. Also they have CO2 sensors that shuts them down if the levels gets to be too much.
That Big Buddy heater keeps the shanty cozy warm when the wind is howling and the temps are in the teens below zero, at the medium setting.
I have seen catalytic heaters in shantys that were nearly air tight and they didnt have a problem with CO2 levels.

The one reason I am interested in this, is that it doesn't have to be mounted. I wish I could figure out a way to have the wave as portable, but as you mentioned quick connect settings should not be used.SaveSave

I used a whole can of propane one day while working in the winter and wasn't super warm. It was a regular Buddy, not the Big Buddy, but very greedy on propane.

Waves don't take up much room and use 3 sturdy screws to mount. Clearances required: 4" from the floor, 4" from either side and 18" above. You can always disconnect the heater when it isn't needed; just turn the heater gas valve off and plug/cap the line.

I don't recommend the yellow metal flex lines in a trailer, as they can't take a lot of stress. I don't think they are code in a trailer, either. If a person wants to move the heater, a rubber hose with 3/8 flare fittings on the ends will work.