Quote:
Originally Posted by picklesandjesse
OK, I get it !!! It's going to be cold and wet, but we will not die!!( we will of course, maybe soon ) But you have to understand that 40 degrees C here in Australia is not that great either. Can anyone recommend a heating system that will suffice for the late spring and summer into Oct? I think it might make life a bit more bearable for us. I checked the weather the other day where the boat is and it was -3 degrees but should be about 7 degrees to maybe 12 degrees when we arrive April 20th. Thanks for the help John
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Heating is a whole science up here. Get it right and you're cosy year round. Get it wrong and you're miserable almost year round. Basically three more or less decent variants, all
diesel fuel powered:
Type 1. Pot
heater (Dickinsen, Sigmar, etc.) mounted on a bulkead, with a chimney through the
deck. Plus sides: user serviceable, simple, zero
electrical consumption. Downsides: have to cut a hole in the
deck, takes up space, hard to modulate heat, soot on the
sails.
Type 2. Air-based forced burner truck type
heater (Webasto, Eberspacher, etc.). Mounted usually
engine compartment or lazarette,
exhaust through transom or topsides, takes up no
interior space (and the unit itself is very compact). Heats via air ducts. Plus sides: can distribute heat over a larger area, very effective, relatively simple
installation, relatively inexpensive. Downsides:
noise,
electrical consumption, requires professional
service and
maintenance, does not heat domestic hot
water.
Type 3. Water-based ("hydronic") forced burner truck type heater (Webasto, Eberspacher, etc.). Like Type 2 except distributes heat using
water, like a home central
heating system. Plus sides: Can distribute heat to unlimited number of different spaces, most efficient, individual modulation of heat per space, heats domestic water (a VERY big plus), quiet (if you use radiators instead of fan coils). Downsides: electrical consumption, requires professional
service and
maintenance, expensive (about like air conditioning).
Around here, 90% of
boats under 40 feet use Type 2 and 99% of those are happy with the system. Over 50 feet, 90% of
boats use Type 3. Around here, Type 1 is more for traditionalists, historic vessels, adventurous voyagers who sail far from professional help.
So there you have it in a nutshell.
One other aspect of heating is the use of
engine waste heat.
Domestic hot water is really important here because your tank water will be too cold to bathe in. You should have a proper
calorifier with engine
coolant loop in it and electrical immersion heater, but 99% of all cruising boats will be fitted with that from new. But not all of them have decent circulation of the
coolant through the
calorifier (don't ask me how I know), so worth checking and correcting if necessary, because this function is important.
You can also get extremely useful heat, at not great expense, and zero running costs, by running that same engine
cooling loop through a bus heater in your main
cabin. Then whenever you are motoring, you can get the
cabin nice and toasty -- and DRY -- without expending any
diesel fuel. To get the coolant through both calorifier and bus heater you might need a booster
pump.
Good luck! With good heating, you will sail with pleasure year round. To lie at
anchor on a cold evening but snug and warm inside is indescribably pleasant and cosy -- one of the joys of this sport.