Camco Olympian Heater what size worked for you?

Two wave 3s work great in my 31 ft MH. In 30-50 degree temps, I leave one on low all the time, keeps the chill off at nite. I'll turn it on med and hi during the day whenever we're there.
Depending on where we want the heat, the 2nd heater will come into play. One of the wave 3s is on an 8ft long hose so it can be directed wherever.
When conserving battery power, add another heater before adding fans.

pnichols really came up with a good idea IMHO. The 8,000 unit struggled in my bus not because it was too small but because the dispersion needed fans two of them. Of course heat rises and what good is a 90 ceiling and 45 degree bedtop knee height? The fans are 4 watts each and blow air down from the ceiling in the dining area then again near the bathroom door. This was on a 4F day when I said Adios forever and crossed the Rio Bravo.

For backup in case a heater should ever quit working and make miserable or ruin an otherwise great campout, I recommend going with two Wave3s (good) or two Wave6s (best).

Using two heaters you can place one heater at one end of the RV and the other one at the other end of the RV. Each heater can be set to a different temperature for uniform comfort throughout the coach area.

With two Wave6s and both operating, of course you could handle unexpected very low temperatues. In medium low temperatures if one should fail, the working one can get you by.

FWIW, we're in a motorhome instead of a towable and as such we have three independant ways of keeping the coach warm in case heating systems should ever fail during cold weather camping situations.

The trial for how low can you go.......seems to be somewhere in the fifty degrees outside range. When a rude 60 degree swing indoor/outdoor temps occurs it is enough to make the next size heater mandatory. One 1'650 electric heater -seems to be- equal to 3,000 BTU

The longer it is , the bigger the heater needed

And I like the 8000, and no if you need it, it won't be just a few hours just because it is bigger
If you need a 3000 all night then you will need the big one set on low all night

They will burn the same amount when set to the same btu settings

The big one won't go as low as the 3000, low in the big one is more heat than low on the little one