Yes you are correct. They were misinformed or maybe misunderstood I shoudnt draw conclusions .but I've heard enough sales pitches to make a educated guess. Its the salesmans job to insure that doesn't happen .. hopefully but... If i were the salesman I'd have reassured the customer of a quality heat source for those cold nights! a selling Point!
Hydronic floor heat is possible sure, I said "most" ( a few coaches are ) but not likely as I understood in my reading (read too much into it) they were told it was electric :) and yes, hydronic can be also be used on its electric element so maybe thats what they meant.) Do you really think that? :-).. maybe.