I know there have been a number of threads and postings pertaining to this topic. Going back a couple of years worth of threads, there have been quite a few that have changed the heat source on their boat, for one reason or another. I will be putting an additional source of heat on our boat before this coming season begins. Espar seems to have the reliability part down pat, but is reportedly noisier than the Wallas. Wallas seems to be quieter but not as reliable? Haven't heard much about the Wabasco other than the military uses them extensively, must have some credibilty? Would appreciate visiting this subject once again and hearing how some of those changes have worked out, one brand to another.