said by hm :Well, I was talking about VENTLESS heaters. Properly vented propane heaters/furnaces are no problem at all. I wish I'd had such installed myself for whole-house heating, instead of relying on (noisy) heat pumps.
And once again, just wish to point out. Heaters in trailers and mobile homes are propane all over Vermont and NY. Mine had one. But I closed up the summer place in November, didn't have this all winter long. But I have seen many with this over there all winter long. Just saying. No one died.