This is the second try. The last post did not go through (message indicated "serious error uploading" and kicked (and ticked) me off!)
Since I haven't got as many responses back as I would have expected, I'll give the question a go again on this site.
I'm moving along with the idea of locating a propane fired burner (a flameless hot water heater) to be located OUTside of the boat.
One concern is the so-called "station wagon effect" which is wafting of burned gasses (CO) up and over and possibly inside cabin.
See pics:
http://s1216.photobucket...mp;current=f557792d.jpg
http://s1216.photobucket...mp;current=99d98a56.jpg
http://s1216.photobucket...mp;current=d0ec816c.jpg
http://s1216.photobucket...mp;current=ce6b8700.jpg
What I'm questioning is that if the hot water heater only runs for a few minutes at a time is there really an issue with possible gas build up? Note: I will of course have co and propane sniffer alarms as well. The "Gases" I'm talking about is whatever gases are left after the burning process or coming off the burner (CO?) What if I install a flue or small chimney to divert any fumes away? (the picture is sort of exaggerated
Another question that came up by someone else is that since the tankless hot water heater/burner unit requires a minimum flow of water to turn on the solenoid to start the burning process will my on-board water pump keep up or will it have to be "re-worked" ?
Please pass these questions on to someone who may know about these things.
This second attempt at posting is much shorter than the first, hope it goes through...