1.0 out of 5 stars
Worst on the market, Oct. 9 2014
We had one of these and nothing but problems from day 1. It would stop heating and shut off for no apparent reason. There were an array of erroneous error codes that would would indicate various problems, and then it would work for a while and quit again. The final straw was when it shut down on the Saturday of a long weekend, with no one around who had any idea how to fix it. We threw it out after 10 months and installed a Rinnai. It has worked flawlessly for 3 years now without any problems. Stay away, far away from Navien.