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.

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.

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.

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.
Size, compact
Expensive and unreliable