Best Gas Continuous Hot Water Systems

Best customer service EVER. Problem solved immediately at no cost or effort to me. Awesome. Show details

Wow, just had the 21L always hot continuous Flo LPG hot water heater installed to replace a lesser known brand unit that I struggled with for 18… Read more

months that would make up its own mind to ignite. Hot water arrives at the shower, vanity and bath very quickly and as I am on tank water with little pre flow to waste. Very quiet operation. A blessing. Extremely happy. Great price from Bunnings with excellent service from them as well.

5years old and the bottom of water heater has rusted out rinnai believes the heat exchanger is leaking which supposedly has a 25 year warranty .Have… Read more

been told that I have to pay for labour to replace a part under warranty .Still trying to figure that one out. Supposedly this heater will last 15years but from what I have seen and heard that this not uncommon I am very doubtful of rinnai quality . Now awaiting a technician to confirm the outcome but it is obvious that the high priced water heater is nothing more than a 5year scrap metal piece

I hate this product, it works correctly 20% of the time, the rest of the time it cuts out as soon as it gets warm and water goes cold. You have to… Read more

turn it off then back on to warm it, then it cuts out again. Customer support was no help either, after performing a test the said it was working correctly, which it is not.

This unit works brilliantly, never misses a beat. I had a question that I thought was related to the system, I sent email for help. Within 24hrs man… Read more

called & solved it which wasn’t Thermann system problem & he never charged me a single cent. Happy to recommend Thermann & Stephen to anyone & everyone AAA+++

First class product and service – Best camping purchase I have ever made friendly service and everything was delivered in a timely manner would highly recommend this Brand to everyone wanting a hassle free purchase and product! Show details

Trash unit, i had a plumber trying to fix it when it was still under warranty. He came at least 5 times. As soon as the warranty expired it played up again. This unit should not be allowed to be sold. Show details

We have had our B26 for 5 weeks! inconsistent hot water,no hot water,boiling to cold water. Great plumber came and confirmed that somethings not… Read more

right .Rang Rinnai twice to get in touch .Once they rang my husband and left a message he rang them back to be told there was no record of the plumber ringing BUT THEY WERE THE ONES THAT RANG US????? So cold showers no one has come out . Had an Infinity system for 20 years AMAZING didnt even have it serviced in that time. Very disappointing I actually cried because coldest morning in Perth 5;30am cold shower.

My retired father (on a disability pension) had a Rinnai B16 outdoor hot water system installed professionally as part of a “premium” granny flat… Read more

from Same Day Granny Flats in mid-2024. Less than a year later, the unit failed completely due to ant infestation. Rinnai refused to cover it under warranty and charged $380 for a technician callout—that’s a full week’s pension gone.

This was an outdoor unit, installed by a licensed plumber, in a completely normal Queensland environment where ants are common. A brand like Rinnai should build appliances that can handle local conditions, especially when marketed as reliable and long-lasting.

Terrible customer service, no compassion, no accountability. We’ll never use Rinnai again—and others should think twice.

I have a Rheem gas continuous flow water heater installed on 18/09/2025. It has worked without any problem until the 24/09/2025. I called the… Read more

plumber, on the 25/09/2025, who installed it and he said to me to unplug it, for few minutes, if I had no hot water. I had to do this operation 4 times between the 25/09/205 and the 30/09/2025 to get hot water again. Unfortunately, to day the 30/09/2025, the Rheem did not start again, and I have not hot water, in a middle of a shower. I am VERY DISAPPOINTED with this product ! I am waiting for the visit of the plumber today (30/09/2025) to fix it to be able FINALLY to have a full shower.

10P HWS pilot light issues – Young widow and novice to home maintenance now my HWS burnt out and I replaced it with the same 10P. House was vacant for 3 months and gas was turned… Read more

off. Tried to light the HWS on my 10P and no luck after hours of trying. Due to financial difficulties I have to a boil a kettle for a bath each day. Very disappointed especially when Bosch products are very highly rated.

Worked for a week stopped i fixed works great standard sort of water heater i think they're good

Unreliable and Costly – Constant Issues with the C7 Thermal – We have had constant issues with this unit. After spending approximately $7,000 replacing taps, aerators, pipes, and a regulator to rule out other… Read more

causes, the problem remains unresolved. The common denominator is the C7 Thermal, which was installed less than three months ago. Which, within the first month required the hot water unit to be replaced. On a brand new unit. Despite this, I have yet to experience a consistent hot shower. The water temperature fluctuates so much that I cannot even rinse my hair before it turns cold.

This has been incredibly frustrating, and I am beyond disappointed. A hot water system should provide reliable hot water, this one does not. I would not recommend this product to anyone.

***Additional Information*** We are on our fourth unit within 6 months. Each dead. Guess what. I contacted the service company and they said there was hard water. The newest one, that lasted longer than the rest is dead. I had a different plumber out. He said it made no sense. He said the filter has no sediment or evidence of hard water. There is no evidence of hard water in the system at all. He then said he couldn't get the pilot light to start. I AM DONE. He is ripping it out next week. We are putting in an all together new system that is in no way related to this company. He also told me that the inconsistent water temp is pretty normal for this unit.

I also forgot to mention, we would turn the tap all the way to hot to let it heat up, then slowly add cold. It didn't help the issue of inconsistent temp. We also had to run the vanity tap at the same time to keep the most consistence of temp. Have I mentioned how aggravated I am about this?

Don't install a Rheem! – My wife was conned into getting one of these by a plumber and I agreed by SMS because I was working remotely and couldn't talk turkey with the people… Read more

myself.

The unit takes way too long to wake up. Hence the money you save on gas storage costs will be spent on water wastage bills.

Ridiculous cost for what it is, obviously marked up according to the "savings" that you are supposed to be banking on gas. Well, let's see how long the thing lasts - it will need to see out the warranty and then some to get the dollars back.

Needs a powerpoint installed - extra $$$...

The biggest gripe is that the unit is simply not fit for purpose. Their claim is that the unit complies with the Australian standard, not exceeding 50 degrees so they set it to 48! I understand this is possibly to allow for ambient variation, but you have got to be kidding me. 48 degrees gives me 47 at the first outlet, about 43 at the last outlet. Our last storage heater gave very nice (50 degree tempered) water at the first outlet and believe me that 3 degrees makes a big difference...

Excellent replacement for my 30 year old natural gas unit – We had a (I'm guessing coz I bought it secondhand) 30 year old pilot light version which finally died. The heater core had corroded through in an… Read more

awkward spot making it irreparable. Looking for a way out that wouldn't mean having to rebuild the laundry we had this one installed. Quite apprehensive from all the negative feedback on product review. Many of those reviews describe complaints that show they haven't read the manual. We really like the new unit it performs well produces stable temperature hot water. As the unit uses Hydropower to light the burner, ignition time is slightly longer. Plumbing to kitchen and shower is short so loss of water is minimal. We like our unit. With it's digital technology will give you an error code should there be a problem.

As a whining boomer – Who thinks my sh^t doesn't stink. I found this unit to be much worse than the ones we used to hand make out of string and rocks glued together with… Read more

our impudent rage from being talentless imbeciles. No, wait, it works well as described, when installed correctly and AFTER READING THE MANUAL. It's a direct flow hot water system not a 1000litre nuclear powered fission reactor.

Poor units – Coming from a hot water tech. Very poor Chinese made unit. Have 6 systems in block of unit only one is working. They have had multiple services,… Read more

repairs and components replaced but 5/6 have failed.

Don’t buy, install, repair or fix go straight to Rinnai - Japanese made, bullet proof, excellent reliability excellent warranty.

Very unreliable heater – Purchased this privately in “as new” condition as indeed it was, installed it and it ran seemingly great, it wasn’t until a few weeks later that a… Read more

guest in our house said they we’re having a shower and the water went cold 10-15 seconds after they got in the shower. I later tested it and on the first occasion it worked perfectly. I retested and same again, couldn’t make it fault! So I thought there must have been something else wrong. A few weeks later I was running hot water into a sink then noticed it had gone cold! Turned the water off then back on and it worked fine. I decided to research the model and was not surprised to find that this was a common problem with this heater. It now fails on a regular basis, real sorry that I purchased it, I would not recommend this model to anyone