How do you get your heating system to work efficiently?
You mention that you have a WEBASTO hot air heating in your boat and four outlets. My boat is a little smaller than yours (40 ft). I installed 3 years ago a heating (Eberspächer) very similar to your Webasto I imagine and 5 outlets (one in the forecabin, one in each of the aft cabins and two in the center. This heating provides hot water as well in a very efficient way. But I'm not satisfied by the heating which is not efficient at all. The heating exchanger (XEROS 4200) is at the aft part of the boat and the air is not hot enough when arriving in the fore part and even in the middle (too long hose?). When it is 10°C outside, I cannot get more than 14°C inside..... That is why I would like to ask you how is the installation of "Aventura III". Do you use some exchanger similar to the XEROS ? How do you get hot air at more than 4/5 meters from it?
Your problem could be the insulation of your boat. My boat is very well insulated, both overhead, and the sides down to waterlevel (should have gone right down to the bilge!). We had no problem keeping the boat warm in Antarctica, even if, as in your case, the hot air outlets farthest away from the heater were not very efficient. So you may have to get the boat better insulated... or learn to live at 14°C... in Antarctica we had the temperature go down to 6° at night - and we survived!
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