Similar problem to Sarah
12 years ago I installed a Rinnai 32, we were putting in a new extension on the second floor and the plumber advised me to put in a 20mm pipe instead of a 15mm (standard pipe for hot water), for better flow. (Sarah said she had a 25mm pipe in one of the other reviews). We found that we had the same problem, it took ages for the hot water to come through, I consulted another plumber and he pointed out that the bigger the pipe, the more water sits in the pipe and goes cold when your not using the tap. We reduced the pipe back down to 15mm and it made a massive difference. Since then I have fallen love my with my Rinnai, it never runs out, its efficient, it hardly takes up any room unlike my last tank and best of all it has never broken down. Sarah's problem is pipe size, try 15mm if possible. regards Tony.
Too long to get hot water
We have a reasonable sized house with 6 bedrooms and installed 2 x Rinnai 32 units at the end of last year on either side of the 1 1/2 storey house. All new 1 inch pipe work was put in as part of our renovation so we could run 2 showers at the same time. It is taking a minute 20 seconds to get water to some of the showers and 40 seconds in the kitchen. The plumber says I need to turn the hot water tap on fully and not the cold and once its boiling then adjust the hot tap to the desired temperature and then also turn on the cold tap. This is not practical with children. The plumber doesn't know what to do.
Terrible unit and service
Have had unit for 6 months and it cuts in and out with producing hot water. Is faulty and when ring people that put it in (Gas appliances sevice) if not warranted fault then is very costly. DO NOT BUY RINNAI units as they are far too expensive ($3,000) for what you get and they are totally unreliable. Go with what you know not infinity unit - warranty useless as up to electrician to say if warranted problem or not. Call out fees totally over the top and a rip off.
First one lasted 14 years, just bought another.
I bought my first Infinity 32 in 2002, and it has just died due to a water leak. It never had a spanned on it. So impressed was I that I have just bought another Infinity 32 which also works with my original controllers. Very happy to recommend this unit.
Fails in all respects
We are two people in a two storey house. We went with this so that two appliances can run at the same time, wrong. Second, whilst former unit could get hot water to the second storey this one can't without a major upgrade to the pipes going up. Third, don't bother with a bath, we have tepid water followed by cold water. Forget it, after 2 months I give up, not only misrepresentations all over the place in likely breach of the consumer protection provisions of the competition and consume act, but the installer says that rinnai says that fluctuating temperatures are normal, so just have to put up with that. Sorry not for a device that cost over $3,000. Making arrangements to get rid of the thing so that we can live in the modern world.
Poor quality. The unit completely died within 18 months of use and then we had to call for a service call where the first question Rinnai asks you if you accept an expensive call-out fee of $179 and then $132 per hour for labour! if its not warranty related. It puts you in a difficult situation of refusing them would mean no hot water for your family for a few days. They are polite and offer a attendance to your house within 24 hours which is good but expensive.
Instead I got an independent plumber for $49 call out fee and the unit was dead with internal faults. Not reliable, look elsewhere.
Expensive and unreliable
Good unit - go for the larger capacity one
I've had an Infinity 26 at another property - found it wanting to supply taps at once without affecting the supply of at least one.
So went for the 32 this time and it does the job spot on. The brochures don't really describe what these units can really do - well not the way I like my showers - go for the capacity bigger than you think you need.
Can comment on the efficiency - only had it for 3 months and running other appliances - have no reference against the prior system.
Installed 2 controllers - 1 a deluxe so I can fill the bath to a set level but have not used yet. Have had standard controllers before - a bit of a waste as you tend to set it at 50c and leave it there. Rinnai apparently double your warranty if you use them - their quality is excellent so is it needed. The Infinity 26 in the other house is 8 years old now has run without fault.
Uninterupted, continuous hot water.
Some delay to supply but this would be the case with any hot water heater as the hot water needs to get to you. The tap nees to be open at least 20% for the system to kick in and heat - no big deal just means you can't run the tap at a trickle and expect it to be hot.