Ladia, Mine is a self-contained unit (Waterfurnace) It has a circulator pump built-in for the super-deheater, which can be switched off it you don't use it. (Why would anyone not use it?) It could be used for radiant floor heat, but I really think I use most all of the hot water it can make. At least in the winter. In the summer, I have both the passive and active 80 gallon tanks full of free hot water. But no need to heat the floors in summer.
Interesting conversation and observations.
Hey Moe, I'm trying to think but nuthin's happening!
