So... you can rip out a serviceable propane
stove, and for a couple of thousand dollars, have a more efficient diesel
stove that may be so hot during the summer that you end up having to go out to a restaurant because using the
stove makes the boat too hot to sleep aboard.
How much more efficient is diesel
fuel compared to compressed gas? Are the savings big enough to warrant thousands of dollars in up-front installation costs, or will it take eight to ten years to break even on a new diesel
stove/heater, compared to just using gas in the unit that's already there?
If you find a diesel stove in a boat that suits you, great, but don't be looking to save money by making large capital outlays when you don't have to.