safe unattended heat
I think I have a pretty good grasp of many of the merits (and drawbacks) of various heating options. But which heaters are best for times when the boat will be left unattended? These times would include being at work, away for a weekend, and possibly a week long vacation.
I am considering:
- bulkhead mounted diesel (sealed combustion chamber)... but I don't think these are supposed to be left burning unattended (though it seems like a lot of people do it). How safe/unsafe is this? What exactly happens if there is a blowback? Are there other dangers?
- forced air... These seem like good candidates for leaving unattended. Any opinions on this? Is it acceptible to the manufacturers?
- bulkhead mounted propane (sealed combustion chamber)... I would rather avoid propane, but I do currently have a propane stove, and a safe vented locker, so I might consider it.
My main concerns are safety, reliability, and liability (I would prefer not to violate the manufacturer's instructions as I would think this would have insurance implications if anything went wrong).
I am in the New York area, and will be heating a 33 foot boat with 3 cabins. I will be on the boat most nights... but I don't want to have to winterize the plumbing when I am away (I will probably winterize the engine as a precaution). The marina I am considering does not allow electric heat, although they might be ok with some low wattage heaters just to prevent freezing... if so, this might be an option.
Any opinions/experiences with this?
Western Long Island Sound