Well, if I had consulted with him earlier, I would have known there was an issue with my layout, and I could have saved myself a considerable amount of wasted effort. The problem lies with the gas califont, probably the main component of the vast majority of marine (and recreational vehicle) hot water systems in the country. All gas appliances are regulated in New Zealand and there is a legal standard covering how they are to be installed: AS/NZS5601.2:2013 Gas Installations – LP Gas Installations In Caravans And Boats For Non-Propulsive Purposes. Like all good government documents, it is incredibly hard to get hold of a copy to consult.
If you do manage to get hold of a copy and can make sense of the techno-legal jargon, the important detail is the fact that a califont cannot be installed inside an enclosed area on a