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We use propane camp shower to heat water
We sail a Caliber 28 and have a propane-fired camp shower that we use for hot showers on cold sailing days, and hot water for dishwashing. We hang the unit from the boom, keeping all combustion outside. Using the small 1 lb. propane cylinders, it has a 4 "D" battery pack for the pump. One hose end goes in a bucket of water and the other end is a plastic shower nozzle. It raises the water temp 30-40 degrees, so any 60-70 degree water becomes a 100-110 degree hot shower. If you have very cold water (like Lake Michigan), you put the shower nozzle back into the bucket for awhile, raising the water temp, like RECIRC in a car. Sometimes hard to light on a windy day, I drilled the matchstick hole a little larger for a barbecue lighter.
While Dad likes to shower in the cockpit, for teenagers we put a little extension on the shower hose, leading it around to the porthole in the head. About $80-130 at Cabela's. The whole thing stows in a 3 gal. cat litter bucket. (We store the propane cylinders in a 4" PVC tube strapped to the stern rail, hence venting overboard.)
Look for my article on Spotlights for Sailboats in the March 2009 Good Old Boat
Last edited by hullcurves; 01-14-2009 at 01:26 PM.