I fish in Valdez and have an older 26' boat that doesn't have a heating system. The cabin is large and has a nice sliding door in the back. I can close the cabin up on those cold mornings. I don't like using a little propane heater like the coleman buddy but it works. The only problem is everything fogs up using the propane I have to leave things cracked open for fresh air etc. I've been looking at West Marines catalog and see the hydronic heater, hose, duct kit that uses engine heat just like a car or the little Origo alcohol heater. What other options are there that are simple, work well without moisture problems? I'd like to stay under $500 or my wife will make me start donating body parts in exchange for a parts budget.