psneeld
Guru
What's the answer? Heat?
Really depends on the boats compartmenting.
Simplest is the marine Dickinson or Reflex heater with gravity feed fuel.
Like most boat stuff aviliable used OUT OF SEASON , on Craigs list or???
Works sans electric for months on end.
A bit pricier is the Dickinson Pacific oil range .
In non survival areas (doesn't go below freezing for long) a modern split air cond can have a COP of 5 or 6 , so paying for electric , even at marina rates isn't bad. Till the power goes down for a week.
The really small home OIL furnaces with base board heat (Difficult to plumb in an existing boat , but far better than toe kicks) is a choice for a bigger boat.
The marine Hurricane is close to these and might be battery powered if the juice is not out for a week.
Read the AC rotary transfer switch stuff as an example of non marine choices.
A switch that requires maint or replacement (no rebuild parts are available) for a few hundred bucks , or the old RV style of 3 sockets ($10.00ea) and a $10.00 plug .
Sure it takes 20 seconds every time you switch from power pole to noisemaker. The lack of maint (hours) or need to repla$e makes my choice , pull the plug , not the yacht store choice.
This type trade off can create a simple boat that doesn't eat boat bucks just sitting in a marina dieing.
FF
I agree that there are MUCH better products and methods than our current marine business is offering in many cases.
I also agree that neanderthal can be better...especially if it only takes a second or two to manually preform something that will last over something complicated and prone to problems...like your switching method of "just plugs".
I have looked for a suitable hydronic heating system as I also like the concept of unlimited hot water and a way to practically use up diesel that is just sitting for my summer season when I'm working not cruising. The smallest, inexpensive boiler I've found is the Kumo ...but it's still 2-3x larger BTU wise than I need and I'm a little leary of the install and future surveys/insurance issues. Hate to lay out the money and install only to have the surveyor/insurance people say it's gotta go.
I may just go with the Hurricane if I can get enough positive feedback on them.
I just don't like the wick burning heater/stoves as they have a tendency to need "attention" that non-techie, non-boaters staying might turn the boat into a soot factory ...