What would you recommend for a small cabin heater. I have a 22 ft Bayliner, small cabin cruiser. We go out during the day and home at night. We do not sleep on the boat, usually. We go out in Prince William Sound, Alaska. Usually it is not to cold but in the spring and fall is can be cool.
We spend most of the time in the upper cabin, level with the rear fishing deck. It is open to the stern but we have canvas drapes to cover rear if needed. We fish and photography. Head and sink are in lower cabin. Almost of time is spend in upper deck to fish and take pictures.