Originally Posted by
ms ann thrope
I've used the Big Buddy catalytic heater in my Class C motor home for four years. You need to leave a window cracked; I generally leave two cracked, as the shutoff on the heaters can be sensitive, and it can be hard to get them going again if the oxygen sensor shuts them down. And there's no condensation problem at all, despite the eager young scientists who insist there must be, with this approach. And no power is req'd to run the things, though there is a fan you can connect to 12v. RV built-in heaters suck a lot of juice, make a lot of noise, get too hot before they shut off & too cold before they kick on . . . Plus they have a feather switch that often prevents them from coming on.