I like the warm squeeze idea too, but....
if she feels warm to me, then I feel cold to her.....back to the starting line. Speaking of ventlilation, I have one solar vent in the forward hatch, two cowl vents in the salon, and a 10"x4" SS vent in the companionway, and a mushroom vent in the head. With this much ventilation, I can't imagine a problem with a small 3-5K heater.....what do you think? Also, Patrick....I have read the idea you mentioned, but what about a cast iron pot rather than a clay pot? I have the "keepers" for my Origo stove so as to keep the pot from falling off. And how would this compare to a 3-5K heater?