pkovo
Well-Known Member
No one suggesting indirect fired water heaters?
https://www.amtrol.com/product/boilermate-indirect-fired-water-heaters/
example: https://www.homedepot.com/p/Amtrol-BoilerMate-41-Gal-Indirect-Fired-Water-Heater-CH41Z/205193077
Honestly, I would echo what Michael.su said. It is cheaper and easier to swap out what is already in place, unless you are wanting to update the system.
I have one of these 41 gallon Boilermates set as priority connected to my oil fired boiler. I've been very happy with it. We only have two baths, but there are 5 of us, and I'm the only guy. We don't pay any attention to running multiple hot water items simultaneously, and we never run out of hot water. It seems to heat it back up as fast as we can use it.