Installation of a replacement Infinity Hot Water system

Forums › Home Workshop DIY › Installation of a replacement Infinity Hot Water system

networkn

Networkn
32862 posts

Uber Geek
+1 received by user: 15453

ID Verified

Trusted

Lifetime subscriber

#302936 5-Jan-2023 10:04

Our current system is a Rinaii Infinity system which is very old, nearly 20 years Rinaii estimate.

I found that I can buy a replacement more efficient model for around $1500, but any idea what it would cost to install if it's replacement of an existing model from the same brand? is it a minor or Major job? Just after some form of ballpark I guess.

I tried contacting a couple of places over the break but of course, quite reasonably they are all on holiday!

Dingbatt

6804 posts

Uber Geek
+1 received by user: 3694

Lifetime subscriber

#3017219 5-Jan-2023 10:22

As far as “minor vs major” goes, it will need someone with electrical, gas and plumbing qualifications to install it and sign it off, won’t it?

Someone like “Laser”.

“We’ve arranged a society based on science and technology, in which nobody understands anything about science technology. Carl Sagan 1996

Wheelbarrow01

1784 posts

Uber Geek
+1 received by user: 2638

Trusted

Chorus

#3017539 5-Jan-2023 18:19

I had this done 4 years ago - a result of someone turning the power off at the bach in winter, causing our original Rinnai califont to freeze and blow out.

Below is my invoice. Bear in mind it was a holiday weekend callout and we paid for same day freight to our remote location, but you get the idea.

Basically 4 hours labour and some sundries:

fe31nz

1294 posts

Uber Geek
+1 received by user: 423

#3017606 6-Jan-2023 01:07

And remember that due to climate change, gas is going away. You are unlikely to get another 20 years out of a replacement unit.

SomeoneSomewhere

1882 posts

Uber Geek
+1 received by user: 1086

Lifetime subscriber

#3017607 6-Jan-2023 01:40

Efficiency gains in gas gear is usually fairly limited. You might be going from at best case 80 > 95% - sure, that's 75% less losses, but it's only about a 20% reduction in usage. It's not going to pay you back the $1500 or even half that.

Wait five years and go to heat pump storage when it blows.

Handle9

11924 posts

Uber Geek
+1 received by user: 9675

Trusted

Lifetime subscriber

#3017614 6-Jan-2023 07:28

It's not a huge job. We did one in our last house, it was a half day job as above. A plumber gas fitter can do the whole job if the unit is on a power point. If not it's also a job for a sparky, although many gas fitters will do that bit as well. We did a whole lot of other jobs at the same time to give the gas fitter enough to do to make it worthwhile.

We only replaced ours as it was having performance problems. If your unit is producing enough hot water at the right temperature don't bother replacing it. You won't get enough efficiency savings to make it worthwhile and they are readily available when the unit dies.

insane

3324 posts

Uber Geek
+1 received by user: 1006

ID Verified

Trusted

2degrees

Subscriber

#3017683 6-Jan-2023 09:49

Friend of my mine paid a plumber $500 for a direct swap as all the piping etc was in the same place.

He bought the new unit himself online, so was just a few hours job Inc leak checks etc