Rinnai Infinity 20 Litre

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About Rinnai Infinity 20 Litre

Delivering 20 litres of water per minute the Rinnai Infinity 20 gas continuous flow hot water heater is ideal for a home with one bathroom. This externally installed system is highly energy efficient with an energy star rating of 6.1, providing you with low ongoing running costs.

Rinnai Infinity Continuous Flow Gas hot water system

When it comes to hot water heating the Rinnai name is quickly becoming an Australian household favourite.

Rinnai Infinity 20 Continuous Flow Hot Water System

With continually advancing technology, models to suit any sized home and high warranties of 12 years on the heat exchanger you know that you can trust Rinnai to suit your lifestyle and hot water heating needs.

The Rinnai Infinity 20 offers a compact and sleek design and is for external installation only, but it can be installed in a recess box to save space and fully conceal your hot water heater. A pipe cover can also be installed to hide any plumbing pipework, as well as there being an optional security bracket available to secure your unit from theft.

When it comes to hot water heating Rinnai has thought of it all and they also provide optional water temperature controllers with the Infinity 20 for added convenience and safety.

No Interest Ever!* Payment Plan Options Available

No Interest Ever!* payment plan options available on hot water heater replacements to help ease any financial stress this burden may cause. If your rinnai hot water heater is leaking, or you have no hot water, we can often have a plumber to you within the hour*.

Interest free payment plans* on the Rinnai Infinity 20 Hot Water Heater

If you’re looking at newly installing or upgrading your hot water heater and you’d like a Rinnai Infinity 20 why not take advantage of the no interest EVER payment plans* available from Jim’s Plumbing?

For only a 10% deposit we can have your new Infinity 20 supplied and installed, usually on the same day as our plumber first arriving to your home.

The plumbing experts from Jim’s Plumbing can provide you with an on the spot and competitive, no obligation, quote for your new hot water heater installation and you can trust that our service and quality workmanship is second to none. You can rest assured that your attending plumber from Jim’s is also a fully qualified gas fitter and will supply you with a certificate of compliance upon installation of your new Infinity 20. This certificate is required for any new gas installation and ensures that your gas appliance has been installed correctly, has been tested and is in perfect working order.

When it comes to such an important appliance for your home or office you want to make sure that the right hot water system has been chosen. One that is guaranteed to meet your hot water heating demands and you need to ensure that the system has been installed by a fully qualified and experienced technician.  Look no further than Jim’s Plumbing – your Rinnai hot water experts.

Rinnai Infinity 20 servicing and repairs

Your Infinity 20 should be serviced according to manufacturer’s instructions to ensure optimum performance. If you wish, at the time of installation, we can set you up with scheduled servicing to assist with preventative maintenance and provide a much longer lasting and reliable hot water heater.

Should you experience any issues with your current Rinnai Infinity 20, such as no hot water or your gas pilot light won’t stay lit, then give Jim’s Plumbing a call for a prompt and reliable repair. No matter the time of the day or night we have a local plumber on-call ready and waiting to assist.  In a hot water emergency we strive to have a plumber to your home within an hour* of your call across metropolitan areas of Adelaide, Melbourne, Perth, Brisbane, Sydney and Canberra 24/7.

If you’d like to know more about the Rinnai Infinity 20 we have included specifications below, or please contact us anytime for expert advice.

Infinity 20 Specifications

Energy Rating

6.1 Stars


Natural Gas

Temperature Controller

Optional extra

Height of Unit


Width of Unit


Depth of Unit


Weight of Unit


Colours Available



50°C or 60°C (Factory Default)

Min. Water Pressure

160 kPa

Max. Water Pressure

1000 kPa

Mj/H (Natural Gas)

13.8 min / 160 max

Flow Rate

25°C rise at 20 litres per minute

Connection Sizes

20mm Gas / 20mm Hot Water / 20mm Cold Water

Status Monitor



3 years Parts & Labour

12 years – Heat Exchanger (part only)

Rinnai INFINITY Gas Continuous Flow System – 20 litre Prices

Jim’s Plumbing proudly offer interest free terms* on every new and installed Rinnai INFINITY Gas continuous flow hot water heater.

Choosing the Correct Hot Water System

Choosing the correct hot water system can be difficult, as there are so many options to choose from; Click on the links to find out more about these systems.




Heat Pump


Gas boosted solar

Please be advised that we may have additional Rinnai Hot Water System models available.

*NO INTEREST EVER!* PAYMENT PLAN, “Fees, terms and conditions apply”.

No Interest Ever!* Payment Plan offered through Certegy Ezi-Pay Express. No Interest Ever on your hot water heater replacement or new supply and installation, gas service, water service or drain replacement. Conditions apply.

Information on this page is subject to change. Commercial hot water systems also available on enquiry.

*Conditions apply.