Short Wave Sportfishing wrote:


I need enough heat that I don't get cold - say like a town car sized
space for instance - it's about the same total amount of space that
will be enclosed. As to weather, it's only a 20' boat, so sea
conditions light certainly, but it could be cold, snow, rain, etc.




Later,

Tom

"Beware the one legged man in a butt
kicking contest - he is there for a
reason."

Wun Hung Lo - date unknown

Recognizing that I don't know what I am talking about, a couple of thoughts:

1. Insulation only retards the transfer of heat from the cabin to the
outside. You need heating BTU capacity capable of overcoming the loss,
given the desired cabin temp. The higher the desired cabin temp, the
greater heat transfer for a given amount of insulation. That's where the
thermal underwear comes in handy.

2. Is the engine fresh water or raw water cooled? Seems to me that a
heat exchanger working at 180-200 degrees will work better than one
using 140 degree water.

Eisboch