personally propane is nice for instant pretty safe heat, but it gets used pretty quick. its some where around 20k btu per pound.
i like the idea of wood a lot because its free, and i love a real wood fire.
diesel i like because it is safe, easy to store has decent btu per pound.
if i had a boat that had storage space wood would be a no brainer for me, but it will probably be diesel if i ever need heat
edit wood has around 9k btu per pound, diesel is around 25k. so diesel will give the most heat per pound. a 20 lb propane bottle is around 4 gallons, and it will cost 13 to 20 per fill. the same heat from diesel will take about 3 gallons, and cost around 10. i can get would for 5 bucks per 20 lbs or so if i buy the bundles, or free from the woods. if i needed to heat my boat a lot and had the space i can put a 100 lbs of wood for free, vrs 80 bucks or so for propane and 60 for diesel. all about the same heat value
Last edited by scottyt; 02-18-2010 at 04:11 PM.