Camco Olympian Heater what size worked for you?

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