I wasn't going to resurect this, but seeing as it's already been done for me .....
I placed an order at Norfolk Marine this weekend for a new Propex HS2800 triple outlet marine kit.A bit of negotiating and price matching brought the cost in at about half what the equivalent Webo would have been. They may be a bit more expensive to run, but the difference in initial outlay is going to buy a hell of a lot of gas!!!
The one thing I am going to do, though, is purchase a Webo exhast skin fitting. The Propex ones have an inlet and an outlet, as they take the combustion air from outside unlike the Webo's. On quizzing Propex on this, it is because in theory, if the solenoid valve failed in the open position, then theoretically gas could end up coming out of the air intake and therefore needs to be vented outside. The problem is the Propex skin fitting is a bit of a naff flimsy affair that Ido not think is going to stand up to any sea use very well. I'm therefore going with the more robist Webo exhaust fitting and a metal skin fitting for the air intake.
Apart from the massive difference in price, the ease of installation was another big factor as I simply cannot see and easy way of getting to the fuel tanks. However, the gas pipe runs through the locker where I intend to mount the Propex unit so thats handy! The only tricky bit is going to be trying to route the hot air ducts .
Hopefully in a couple of weeks we should have heating