Rinnai i060CN Condensing Gas Boiler, Whole Home Heating and Water Natural Gas Heater with Space-Saving Design and Smart Features, (60K BTU)

This thing is great. It heats my home and provides unlimited hot water. It was a little bit of work to install and very complicated but once I learned it it was great. I'm very happy with it

I installed it myself replacing a 20+ year old 80% efficient boiler.

Connected this Rinnai 150,000 btu solo boiler into an existing concrete pad with hydronic piping. Approx 3500sq.ft. of pad. The boiler heats the piping in the concrete pad indirectly through a plate heat exchanger with glycol on both sides of the system. A 400,000 btu plate exchanger was selected here. The boiler is extremely efficient with the turn down ratio and the ability to run with the eco mode button selected during warmer days. I have this boiler setup to run in central heating mode which detects the return water temperature to the boiler (no thermostats used in this mode). Works flawlessly.It is amazing how efficiently the heat transfer takes place inside of this boiler to increase the boiler supply temperature.I have always been a fan of Japanese engineering and design with regards to automotive etc.. so it is no suprise that this Rinnai boiler runs perfectly and I am expecting it to continue to do so for years to come

This specific Boiler is extremely efficient and cost-effective. I figure it to repay itself in 2.5 years. I have a second Rinnai Hot Water System mounted next to it. While a COmbi Unit can both heat my house and provide hot water, I chose to install two separate units. In that way, on a very cold day in the winter, I will not tax one unit at the expense of the other function. My water heater for home hot water reduced my home gas bill to below $10 in the sprint, summer and fall. With the increases in natural gas prices over the last 2-4 years, lI expect my investment in the boiler will be paid back in 2.5 years.