Bests & Worsts Reviews from Amazon

I have had this Rinnai V65IN tankless water heater installed for 2 years now. I absolutely love it. We have it installed in a 1400sq ft. home with a single shower. In addition to the shower there are four other faucet locations that can utilize hot water. If we have the shower, and the washing machine running hot water, then this heater is pretty much running at capacity for 125 degree F water. If I had another full bath in the house I would consider going up a step. This unit could probably handle another bath, but if you were running 2 baths and a washing machine I think the unit would not be able to keep up, or you would have to set the temperature of the water higher than 125 F to compensate. If you are going to install this yourself, then do your research. You need to size your gas pipe appropriately for the length of the run you have for the gas flow this expects. You will also need to plan your exhaust exit. The roof is ideal, but don't use the same flue for a tank heater. If your exhaust exits out of the house via a wall make sure the exhaust is far enough away from your soffit vents, windows, and doors. You also will need to deal with the condensate. We ran 35ft of gas line, a few feet of copper water line, a GFCI electrical outlet, condensate trap, and the flue exit over a weekend. Make sure you install a valve kit with this. Every year you need to circulate 4 gallons of distilled white vinegar through the unit for an hour, purge it, and clean the screen filter. There is also a window inside the unit that lets you view the flame during usage. It is a good idea to view this flame yearly to make sure you have an even blue flame. I had only used tank heaters in the past, so I was a bit nervous with regards to performance of this unit in my house, but there are 7 of us and on Sunday mornings it was a pain to constantly run out of hot water when everyone was getting ready for church. I haven't really noticed a lot of savings with regards to gas usage. Water usage has increased a bit as a result of this heater, but it is a trade I was willing to make in order to never run out of hot water. I have to wait for a few minutes for the water to get hot at the point of usage, but again it is a trade off I was comfortable with. It also freed up floor space in my utility room. As I shop for new homes, I always look to see what it would take to install a tankless water heater. I would buy this unit again. I may not have realized a return on investment by way of utility bills, but convenience outweighed the ROI in my case. EDIT 3/11/2018: It has been installed for 4 years now with no troubles. I run 4 gallons of vinegar through it for 1 hour every year per the maintenance recommendations. I also clean the small screen filter, and check to make sure the flame is burning blue and even. We have very hard water, and I should probably clean and inspect it every 9 months. I am still extremely happy with the purchase 4 years later. EDIT 3/19/2020: I have finally encountered an issue. I was getting an intermittent Error Code 11 (no ignition/no gas supply error). After a bit of YouTube searches I found some things to try to fix the issue. The gas manifold should be removed and the burner should be vacuumed of debris. There were several dead moths and a very large very dead spider blocking some of the gas tubes. Other than that the burners looked fairly clean. I also had a loose igniter, and the igniter should NOT be loose. I purchased part RIWH104000240 also recognized as part 104000240. This part is a kit that replaces the igniter, flame rods, and includes necessary gaskets. I paid around $40 for the kit and had it all fixed in a little under 1 hour. I am still very happy with this purchase and the repair was pretty easy. Just take pictures before and during disassembly so you can reference things later when you get confused.