Just joined and saw this post, so I will tell my experience - winterized my 2016 23TR by draining everything and running all the faucets until dry. I did not put in antifreeze, and we had a few days with temperature in the high teens, but 30s and 40s most of the Winter. In the spring, when I added water, the tank-less H/W heater leaked like a sieve. One of the copper tubes inside had burst open. I go a replacement heater on Amazon for $200 less than the repair shop wanted to charged, but I still had to pay them to install it.
__________________
|