I took a long look at Wave and that other vented low power catalytic heater --forgot the name, and decided against adding one.
I don't like the idea of all that water vapor, fussing with being too hot or two cold, leaving
windows open so wide, and the fact that it does not heat my basement.
I like my
furnace. It is very quiet. I might wake me up at times, but it does an excellent job providing a stable temperature. It heats up my basement well. I can leave my dogs inside and not worry about them being too hot or too cold. So far I have used it down to 9° temperatures. I have not tried it at higher elevations yet.
My camper has R12 insulation and thermal double pane
windows. It heats very quickly--9-65 degrees in about 50 minutes, stays warm, and has no condensation issues. My emergency exit has a screen and
fiberglass cover--no glass. It lets in a bit of fresh air. I also have thermal covers that provide extra insulation on the vents and door glass.