I've wondered the same thing, from time to time. I'll be following along here to learn more. Is there no (or low) maintenance on a tankless unit? I like to do as much work on the rv myself (as much as possible). I haven't been to YouTube University on this subject, yet, but what is the difficulty level for installation?
Tom & Teri
(The Sportsman's Paradise, Louisiana)
da' Bus: 2016 Tiffin 36UA / da' Toad: 2014 Jeep Cherokee Latitude Active Drive II 4X4