I have a Rinnai and would not recommend unless you put in a circulating pump. I am the second owner of my place of residence, and although only 5 years old, a circulating pump was not installed with the hot water heater. My place is fully developed up and down so it is not possible to install a circulating system now.
My laundry is on the second floor and it takes a long time for hot water to get there without a circulating pump. The new front load washing machines take very little water so I could never wash with warm or hot water.
I had a small 4 gallon water heater installed below the sink in my laundry room just so I could have warm or hot water for laundry purposes. That put me back around $1500.00.
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