After living with Hydro Hot for 6 months, I have to say I prefer it to the blast furnace we had in our 2000 Alpine. Even when on diesel it is quieter then my propane unit ever was, the sound is just different. In my coach the unit is virtually under my head while sleeping and I find it much quieter than propane units. We now have learned to leave the diesel side off at night. We also now just turn on the diesel side when washing dishes and showering. I just use the electric in zone 2 at night and we stay warm in the bedroom.
The diesel smell is the biggest issue and I'm looking at a Gen-Turi type device when parked in tight quarters. In those situations electric is almost always available. When boon docking I just need to park with my neighbors in mind.
The bottom line is those of us with Hydro Hot type systems need to add a few more lines to our camping etiquette.
I am sure I have offend some fellow campers during my learning process. To any I have offended I apologize.
Wayne & Kathy
05 Alpine 40FDQS #75330 Towing 24' car hauler, 2012 Spyder, 2003 Harley FatBoy