tomman58 wrote:
I wouldn't worry about the O2 as the amount is minimal and you aren't in the same room if you do have a pilot. The only pilot in most trailers is on the water heater and most of the time ours is on electric.
Most water heaters these days are DSI, not pilot ignition; the same is of course also true of most fridges and RV furnaces. The gas oven (if one is there) usually does have a traditional pilot light.
Note that DSI ignition is still a potential ignition source, of course. The fact that all of these burners (except for the oven and stovetop) are outside the RV's interior space is probably more important than the ignition system.