Purchased May 2021.
Specifically called the Rinnai support team prior to purchase to check what happens after a power outage and was assured it there will be "no problem". (I called because I noticed other reviews about the system staying off after a power outage).
So based on the install today and testing : if there is a power outage to the unit it default to OFF.
This makes sense in Japan (Country of manufacture) where the philosophy is "unless I turn something on, it is off" (and that includes hot water - I have lived there).
In Austra...

15 Year later an now the system changes temp get 12 error code Turn of Power then all Good.But will be exchanging for another Infinity 26.or maybe the B26.sO OFF TO THE RINNIA SUPPLYER FOR ME

Hi we have turned off our mains water for repair and now have no hot water apart from luke warm in the bathroom all 3 control panels are on 50 and the in use indicator light is only coming on in the bathroom which is offering warmish water .. any suggestions?

Recently replaced my Chromagen storage/Infinity 20 gas boost solar system with a Rinnai Eternity 26 touch.

There is a similar lag time from faucet opening to when you get hot water, and depends on distance of the unit and length of insulated copper pipe to outlet, not surprisingly.
Unlike the Chromagen the delivery by the Rinnai system is indeed continuous and not interrupted. The temp. for the shower is hotter than the previous even set at 50 degC.
The external system set up is neater, tidier and space friendly. Removal of the roof panel ...

We have Cabin park with LPG gas and approx. half of them are rinnai ones. Never had a problem with any yet...
They may not be the cheapest but do you really want reliability or problems with the cheaper ones?

This is the second one we have purchased
It seems they only last for 10 years and they die so I guess if you purchase one be prepared to replace every 10 years
I didn’t think I would have to replace a hot water system so often
They say they last for 25 years but I would not believe it
I am going to try another brand

Plumber installed all new valves, pipes and new hot water system; no hot water came out, tested gas pressure and was all ok. Again, no hot water came out.

Called Rinnai and no support was given. Staff were rude and not helpful at all. We were left with no hot water.

Never buy Rinnai hot water systems, absolute garbage.

we always have Hot water and have 8 people living in the house. low cost water heater and I can control the temperature so the kids don't get burnt. I couldn't live without it.

Purchased to replace storage gas system. Last experience with instantaneous gas was with pilot light and burner in a small 2 bed unit which worked well.

First thing one has to do, is replace the mains gas line into the property to a larger size, otherwise it wont function properly. The problems a lot of reviewers experience in fluctuation of water temperature is a result of this. Rinnai should have this clearly stated on their website or retailers.

Copy of charges from Dec to Feb.
Total Summer 196 $4.17
Service to Property Charge 63 days 64.800
c/day $40.82
GST $4.50
Total Gas Charges $49.49...

Infinity 20 installed in 1996 replacing an inefficient solar system. Heavy use family home with two bathrooms and it has performed wonderfully during all this time. Had it serviced after about 5 years and was told not to bother again unless there was a problem and there have been none until today. Cost of the unit and installation was approx 30% of a replacement solar system and running costs have been cheaper than the electric boosted old solar unit. Flow rate to two showers at one time is a little reduced but still satisfactory although one shower is perfect achieving water temperatures in excess of my tolerance levels if required !! Cannot rate the unit to highly.

Wow having read all these issues one thing really stands out..... customer service is non-existent just an automated response which does nothing to solve the issues or help the customer.
I'm not even going to bother adding my complaint.
I will just never buy a Rinnai product again.

Had it now for 5 days and it is great.I had a 20 liter before but chose a 16 liter this time and no difference.After shopping around I found this Rinnai to be best value and it looks like a sport's car compared to other brands.The guy at the shop said they never have a problem with customers who buy these.This unit was just a bit more expensive than other's but I found it to be a bargain for what it is.I have it set on 40 degrees on the controller so I never have to turn on the cold water tap as it is hot enough and no risk of Scolding which is...

When your power goes off we have to reset the new controller and turn it back on otherwise the heater will not turn on. This is a pain as sometimes you don't know when the power goes off in the middle of the night and then comes back on so when you go and have a shower in the morning there is no hot water. As we have 2 bathrooms we have the controller in a central part of the house so we have to get out the shower and go turn the unit back on total pain... So spoke to service and the only fix is to disconnect the controller on the main unit... What's the point!!! Very disappointed and there is not fix to the problem. Our older unit would turn itself on when the power came back on not this new one you have to manually turn it on.

We had our Infinity only installed a couple of months ago after our previous hot water service stopped working. I have not had a continuous hot water service before however we decided to go for this type as with 4 of us in the house even when keeping showers short, there have been times we have run out of hot water. I am pleasantly surprised how effective it is and whilst it was explained to us that the hot water will take a few seconds longer to come through than what we had before, this has not been something significant and we don't notice ...

Hi I have Rinnai infinity 26 (REU-V2626W(50)-AK), This system default temp 50 degree Celsius, I tried to decrease the temperature to 25 / 30 degree Celsius via dip switch. but I couldn't. The manual show only decrease 40 degree, can I decrease or not

Dear reader,

I installed a Rinnai Infinity 26 17 years ago.
Trouble free until today, Water leakage from corroded part.

Due to the age of unit it is cheaper to totally replacement of the unit at which I have gone with a Rinnai builder's series 26 60 degree unit with extended warranty for 15 years on heat exchanger and installation of 2 controllers to extend warranty to 5 years.

Later on down the track I will install a Rinnai Hi-Line solar system and install the outlet to the gas B26.

Rinnai are the Leading manufacturers in Hot Water Units gas or electric....

Does not cope always waiting ages for hot water.
Ribbed hosing rusted after only 5 years of use and started leaking like a sieve.
Plumber told me they have had many issues with this hose.
Annode had to be replaced after 2 years use.
They would not reimburse me to change the ribbed hosing to copper which is what it should have been in the first place.
We are pensioners and we cannot afford this additional cost.

so my previous Rinnai Infinitity 26 was installed in 2004 - we moved into this house in 2007 and the water heater failed a couple of days ago - so that's 16 years of trouble free use - my particular unit is the exterior model mounted outside on a southerly facing wall - with a single wired remote unit.

As Adelaide water is pretty "rough" this was a good innings from the unit. I decided to replace the old unit with a new one exactly the same - and a gas fitter exchanged the unit in under an hour using new fittings.

I am very ...

Model Rinnai B26 A2626WB-50-AK
This unit is COLD, 20 degree day & I just had an only hot water shower & did not get warm at all from my COLD supply of water. I will have to purchase a thermometer & see the actual temp from faucet but you can stand under all hot from this unit without even feeling mild discomfort. Installed sheltered area. Looking forward to developing a hatred of Rinnai over the warranty period...
2 questions posed - Copes well with high demand & extended usage
- Does have issues with fluctuation but may not be due to hot water system

Replaced an old mains gas storage heater with an Rinnai Infinity 26 with controllers to set temp. Great news is my gas consumption fell 90% (not a typo).
Some lessons though.
Had to replace the mains gas line into the property to a larger size, ie less gas consumed but at a much higher rate.
Low flow taps/shower heads appear to confuse the heater (hence some poor reviews i guess), solution is to turn on hot tap much more seems to solve problem.
Have had the unit for almost two years, faultless and highly recommended.
However, given the cost of gas main replacement and gas retailers quarterly connection fee, it would have been more cheaper to go LPG option. QLD fee is almost $100 per quarter plus my $10 gas usage.