Originally Posted by MedSailor
3. Propane. Propane heat sucks unless you're a weekend sailor. We have a wall mounted propane stove currently and it will NOT really heat up the boat in modest cold. It also cooks through a heap of propane in doing so and finding a place to fill those heavy bottles is much more hassle than dealing with the other fuels....
Which propane heater are you using?
I would think you'd need at minimum a couple of them for a 41 footer. Our single unit is just right for our 31 footer -- your boat is probably 2.5 times (or more) the internal volume. Ours is the smaller of the two Dickinson Newports (P9000).
But, that said, if I couldn't heat our boat with a single bulkhead mount heater (diesel, wood, or propane), I'd be looking at other options. I just can't see installing multiple units and using up that much "wall space" or drilling that many holes in deck.