This product worked great for a few days after I had it installed. I can heat the water to well above the temperature that I want. So I have it turned down to about half power I get 106 F water which is where I like it. But it can go higher easily with one shower one sink going. The only problem with it is the exhaust fan seems to get jammed up. When this thing senses water flowing it has to start an exhaust fan but sometimes the fan won't start and you get an error. I found that if I just give the upper right corner a little bump with my fist the fan will start. This happens roughly every other day. I cant pin down what causes it, temp? humidity? I would return it but it costs money to have it installed again... so I will probably just live with it until I get sick of it and buy a different one. If it wasn't for that I would rate this as 5 star. Great deal for the money.
Seems to be a well built unit. I installed it less than a month ago and so far so good. Be aware that the required flow rate is .9 gal per min, if you have a low flow nozzle on your sink it will not trigger the unit to fire up. Still making adjustments, but satisfied with the unit. The price was right.
I had a Bosch tank-less water heater prior to purchasing this Rinnai water heater. The Bosch lasted only 8 years and actually had problems from day one of the installation - overheating, turning off in the middle of a shower, leak from the copper burner tank, etc... This Rinnai water heater has been rock solid from day one, extremely efficient and has worked flawlessly for the past year supporting the demands of 5 users in my household. This unit supports at least two showers simultaneously and more. I would definitely without hesitation recommend this product to anyone with a large family that wants an efficient unit without sacrificing the hot water throughput.
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