Hi Don, regards heating
with a sigmar/dickinson.
We had a Dickinson in our last boat, and it was great. But it flamed up a couple of times over winter, and turned the sides red hot, so we wouldn't leave it on if we weren't there to babysit. (It does say in the manual, not to use the heater unattended.)
We also had an espar, which was always on (Annapolis over winter), and which we left on year round, and let it regulate itself. Just like the furnace in your house, you don't have to shut it off, as it will only come on if the temps are lower than the setting. We were full time cruising, from PEI, to Europe
, to Trinidad; the espar was always "on", and we were never cold.
Winters aboard required a little extra heat. That's when the Dickinson came into play. The Dickinson is also very "calming" as you watch the flame, it kinda felt like my Grandmother's place.
I think you'll find a problem getting the heat from the b-deck, down to the hulls, esp to near the floor to keep your legs and feet warm. Heat is very hard to get to move "down" into a hull
. You'd require some pretty strong fans to do this, even the dickinson with a water
coil is unlikely to get the heat down into the hulls as you want.
At least that's been my experience whilst building our cat, I can heat a hull
and be comfortable in the b-deck, but not the other way around.
PS. You can always install a "Y" fitting to an espar and send the heat to two hulls at once, but you'll want at least an airtronic 5 or a D8 to heat your entire boat.
Cheers, and good luck.