Rinnai Infinity B16 Natural Gas Continuous Flow Hot Water System

The Rinnai Infinity B16 Natural Gas Continuous Flow Hot Water System is available from Installed Today as a supply-only natural gas instantaneous water heater or as a complete supply and install package in selected Brisbane and Gold Coast service areas, where available.

Choose the unit only if you already have a licensed gas fitter arranged, or check your supply and install package to confirm natural gas suitability, gas supply capacity, valve kit requirements, outdoor installation location, water pressure, pipework, access and available installation timeframes before checkout.

The Rinnai Infinity B16 Natural Gas is a compact continuous flow hot water system designed for small to medium homes with one bathroom and moderate hot water demand. With 16 L/min flow rate at a 25°C rise, 20 L/min flow rate at a 20°C rise, 6.1 Star equivalent energy rating, Puretemp™ temperature stability technology, natural gas compatibility, compact outdoor design, and a 25-year extended heat exchanger warranty pathway, it is a practical replacement option for homes connected to mains natural gas.

About the Rinnai Infinity B16 Natural Gas Continuous Flow Hot Water System

The Rinnai Infinity B16 Natural Gas is a gas continuous flow water heater designed to heat water only when a hot water tap is turned on.

Unlike a storage tank, it does not keep a full cylinder of water hot throughout the day. Instead, water passes through the unit and is heated on demand using natural gas. This makes it a compact and efficient option for smaller households, one-bathroom homes, granny flats, townhouses, rental properties and replacement jobs where mains natural gas continuous flow hot water is preferred.

The B16 model is ideal for one bathroom and moderate hot water demand. It is best suited to households that want a compact outdoor gas hot water unit with reliable temperature control and no stored hot water tank.

Buy Rinnai Infinity B16 Natural Gas Supply Only

Order the Rinnai Infinity B16 Natural Gas Continuous Flow Hot Water System online as a supply-only hot water system where available. This option is ideal if you already have a licensed gas fitter or plumber arranged and only need the unit supplied.

The supply-only product price is for the hot water system itself. Installation, old system removal, disposal, valve kits, gas fitting work, plumbing alterations, gas pipe upgrades, compliance upgrades and additional site requirements are not included unless selected separately as add-ons.

Supply-only is best for customers searching for:

• Rinnai Infinity B16 natural gas price

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• Rinnai REU-BM1620W natural gas hot water system

• Rinnai 16L natural gas instantaneous hot water

• Rinnai Infinity B16 supply only

• Natural gas continuous flow hot water system

• 16 litre natural gas hot water system

• One bathroom natural gas hot water system

Rinnai Infinity B16 Natural Gas Supplied and Installed in Brisbane & Gold Coast

Installed Today can supply and install the Rinnai Infinity B16 Natural Gas Continuous Flow Hot Water System in selected Brisbane and Gold Coast service areas, where available.

This option is designed for customers who want the gas hot water unit supplied and professionally installed through one streamlined online order. The supply and install pathway helps confirm whether the property uses natural gas, whether the gas supply is suitable, whether the current location is compliant, whether a valve kit is required, and whether any additional gas or plumbing add-ons may be needed before checkout.

The installed-from price is based on the product plus the matching standard installation option. Final pricing may vary depending on gas pipe sizing, gas supply capacity, valve requirements, access, existing system condition, water pressure, pipework changes, gas fitting requirements, compliance requirements, old system removal or disposal selections and selected add-ons.

Rinnai Infinity B16 Natural Gas Installation in Brisbane

For Brisbane customers, the Rinnai Infinity B16 Natural Gas can be ordered with supply and install options through Installed Today where available. This is suitable for homes replacing an existing external natural gas continuous flow hot water system where the current location, gas supply, plumbing and clearances are suitable for the selected installation option.

The compact B16 size can be a practical fit for Brisbane townhouses, small homes, granny flats, rental properties and one-bathroom homes connected to natural gas.

Customers in selected Brisbane suburbs can complete the installation check before checkout to confirm whether standard natural gas continuous flow installation, valve kit selection, gas fitting work, extra pipework, old system removal or disposal options may be required.

This makes the page suitable for customers searching for Rinnai Infinity B16 natural gas installation Brisbane, Rinnai natural gas hot water supplied and installed Brisbane, and 16L natural gas continuous flow replacement Brisbane.

Rinnai Infinity B16 Natural Gas Installation in Gold Coast

Gold Coast customers can also order the Rinnai Infinity B16 Natural Gas Continuous Flow Hot Water System with supply and install options in selected service areas, where available.

This pathway is useful for homeowners, landlords, property managers, renovators and small household properties connected to natural gas that want the product and licensed gas installation organised together.

Complete the supply and install check to confirm whether the existing setup is suitable and whether additional items such as valve kits, gas fitting work, pipework changes, access requirements, compliance work or old system disposal may be required.

This helps customers searching for Rinnai Infinity B16 natural gas installed Gold Coast, Rinnai natural gas continuous flow installation Gold Coast, and natural gas hot water supply and install Gold Coast.

Is the Rinnai Infinity B16 Natural Gas Right for Your Home?

The Rinnai Infinity B16 Natural Gas Continuous Flow Hot Water System may be suitable if you are replacing an existing natural gas instantaneous water heater and your household has moderate hot water demand.

It is commonly suited to one-bathroom homes, granny flats, smaller households, townhouses and rental properties where mains natural gas is already available and a compact outdoor gas hot water unit is preferred.

Because this is the natural gas version, the gas type must match the property. Natural gas and LPG models are not interchangeable, so the correct model must be selected before ordering or installation.

This system may suit you if:

• You are replacing an existing natural gas continuous flow hot water system

• Your property is connected to mains natural gas

• You want a compact 16L instantaneous gas hot water system

• Your home has one bathroom and moderate hot water demand

• You want hot water heated on demand

• You want a 6.1 Star equivalent energy rating

• You want Puretemp™ temperature stability technology

• You want optional controller compatibility

• You want a compact outdoor installation

• Your natural gas supply, water pressure and access are suitable

• You want the choice of supply only or supply and install

Extra work may be required if:

• The system is being moved to a new location

• The existing system is LPG, not natural gas

• Gas pipe sizing does not suit the unit

• The existing gas supply capacity is not suitable

• Existing valves are old, missing or non-compliant

• Extra pipework or plumbing changes are needed

• Water pressure is outside the required range

• Access is restricted

• Electrical connection or weatherproof power supply requirements need work

• The old system needs additional removal or disposal work

• The installation location does not meet outdoor clearance requirements

Key Features of the Rinnai Infinity B16 Natural Gas

• Natural gas continuous flow hot water system

• Rinnai Infinity B Series 16L model

• Product code REU-BM1620W

• Ideal for one bathroom

• Suitable for small to medium homes with moderate demand

• 16 L/min flow rate at a 25°C rise

• 20 L/min flow rate at a 20°C rise

• 6.1 Star equivalent energy rating

• Heats water only when a hot tap is in use

• Compact outdoor wall-mounted design

• Quality Japanese design and manufacturing

• Puretemp™ temperature stability technology

• Precise temperature control for safety and convenience

• Status operation monitor

• Compatible with low-flow rated shower fixtures

• Suitable for higher ambient water temperatures

• Natural gas model for mains gas properties

• Optional hot water controller compatibility

• Pipe covers, recess boxes and security brackets available as related add-ons

• 25-year extended heat exchanger warranty pathway under Rinnai conditions

• Compact 13kg unit weight

• 120 kPa minimum water pressure

• 1000 kPa maximum water pressure

• 1.5 L/min minimum operating water flow

Quick Specs

Brand: Rinnai
Range: Infinity B Series
Product: Rinnai Infinity B16 Natural Gas Continuous Flow Hot Water System
Product Code: REU-BM1620W
System Type: Gas Continuous Flow Hot Water System
Gas Type: Natural Gas
Installation Type: External continuous flow installation
Recommended Use: One bathroom and moderate hot water demand
Warm Climate Shower Outlet Guide: 1 shower outlet
Cool Climate Shower Outlet Guide: 1 shower outlet
Energy Rating: 6.1 Star equivalent
Flow Rate at 25°C Rise: 16 L/min
Flow Rate at 20°C Rise: 20 L/min
Minimum Operating Water Flow: 1.5 L/min
Minimum Water Pressure: 120 kPa
Maximum Water Pressure: 1000 kPa
Natural Gas Rate Minimum: 16 MJ/hr
Natural Gas Rate Maximum: 124 MJ/hr
Factory Default Temperature: 50°C / 60°C, depending on model setup
Electrical Consumption: 68W
Status Monitor: Yes
Hot Water Connection: 15mm
Cold Water Connection: 15mm
Gas Connection: 20mm
Height: 531mm
Height Including Brackets: 571mm
Width: 351mm
Depth Including Brackets: 202mm
Weight: 13kg
Warranty: 25-year extended heat exchanger warranty pathway, subject to Rinnai conditions

Natural Gas Continuous Flow Hot Water

This product is the natural gas version of the Rinnai Infinity B16.

It is designed for properties connected to mains natural gas. The gas type must be correct before ordering or installation because natural gas and LPG units are different product pathways.

If your home uses bottled LPG, choose the LPG version instead. If your home is connected to mains natural gas, this natural gas version is the correct pathway.

16L Continuous Flow Performance

The Rinnai Infinity B16 Natural Gas is rated at 16 litres per minute at a 25°C temperature rise and 20 litres per minute at a 20°C temperature rise.

This makes it suitable for one-bathroom homes and moderate hot water demand. Flow performance can vary depending on incoming water temperature, selected outlet temperature, shower flow rate, natural gas supply, water pressure and how many hot water outlets are used at the same time.

For homes with two bathrooms, higher shower flow rates or stronger simultaneous hot water use, a larger model such as a 20L or 26L continuous flow unit may be more suitable.

6.1 Star Equivalent Energy Rating

The Rinnai Infinity B16 Natural Gas has a 6.1 Star equivalent energy rating.

Because it heats water on demand, it avoids the standby heat loss associated with stored hot water tanks. This can help reduce running costs compared with some older gas storage systems, depending on household use, natural gas pricing, outlet demand and installation conditions.

Puretemp™ Temperature Stability Technology

The Rinnai Infinity B16 includes Puretemp™ temperature stability technology.

This is designed to help maintain steady hot water temperature, even when flow changes occur. Temperature stability is important in everyday use, especially when showering or using multiple fixtures in a small home.

Compact Outdoor Design

The Rinnai Infinity B16 Natural Gas has a compact wall-mounted design.

With a height including brackets of 571mm, width of 351mm, depth including brackets of 202mm, and weight of 13kg, it is much smaller than a storage tank and can suit homes where space is limited.

Installation location still needs to meet outdoor clearance, access, gas fitting, water connection, electrical and compliance requirements.

No Stored Tank

The Rinnai Infinity B16 Natural Gas does not use a hot water storage tank.

Hot water is produced as it is needed, which saves space and removes the need to store a full cylinder of heated water. This can be useful for homes replacing an older instantaneous gas unit or moving away from a small storage system where the site suits natural gas continuous flow installation.

Status Operation Monitor

The Rinnai Infinity B16 Natural Gas includes a status operation monitor.

This helps provide simple operating information and supports service diagnostics where required.

Optional Hot Water Controllers

The Rinnai Infinity B16 Natural Gas can be enhanced with optional hot water controllers where compatible and installed correctly.

Controllers can add convenience and help manage selected water temperature from suitable locations. Controller compatibility, wiring and placement should be confirmed before installation.

Outdoor Installation Only

The Rinnai Infinity B16 Natural Gas Continuous Flow Hot Water System is designed for external installation.

It should not be installed internally. Gas continuous flow water heaters must be installed in accordance with manufacturer instructions, gas fitting rules, ventilation requirements, flue clearance requirements and local compliance standards.

Water Pressure Requirements

The Rinnai Infinity B16 Natural Gas lists a 120 kPa minimum water pressure and 1000 kPa maximum water pressure.

Water pressure should be checked before installation. If site pressure is too high, a pressure limiting valve or other pressure control work may be required to protect the unit and comply with installation requirements.

Natural Gas Supply Requirements

The Rinnai Infinity B16 Natural Gas has a listed natural gas rate range from 16 MJ/hr to 124 MJ/hr.

The gas meter, gas pipe sizing and isolation valve arrangement must be suitable for the appliance. Some homes may require licensed gas fitting work before the system can be installed or operated correctly.

Electrical Requirement

The Rinnai Infinity B16 Natural Gas has listed electrical consumption of 68W.

Continuous flow gas hot water systems still require electrical power for ignition, controls and fan operation. A suitable weatherproof power supply may be required depending on the site and selected installation setup.

Common Uses

The Rinnai Infinity B16 Natural Gas Continuous Flow Hot Water System can be suitable for:

• Natural gas continuous flow hot water replacement

• External gas hot water installations

• One-bathroom homes

• Small to medium homes

• Granny flats

• Townhouses

• Rental properties

• Investment homes

• Properties connected to mains natural gas

• Homes wanting compact wall-mounted hot water

• Homes replacing older natural gas instantaneous units

• Homes wanting hot water heated on demand

• Supply-only orders where a licensed gas fitter is already arranged

• Supply and install orders in selected Brisbane and Gold Coast areas

Suitability depends on gas type, natural gas supply, water pressure, installation location, access, pipework condition, electrical supply, outlet demand and compliance requirements.

Why Order From Installed Today?

Installed Today gives customers a simple way to order the Rinnai Infinity B16 Natural Gas Continuous Flow Hot Water System as either a product-only purchase or a supply and install package in selected Brisbane and Gold Coast service areas, where available.

You can compare the unit-only price, check the installed-from price, complete the installation compatibility check and select matching gas hot water installation add-ons before checkout.

Why customers choose Installed Today:

• Supply only or supply and install options

• Installed-from pricing shown separately

• Compatibility check before checkout

• Valve kits and installation add-ons available online

• Brisbane and Gold Coast service area support

• Suitable for natural gas continuous flow replacement orders

• Clear product and installation pathway before checkout

• Product-only ordering for customers with their own licensed gas fitter

• Supply and install pathway for selected natural gas hot water upgrades

• Compact 16L continuous flow replacement option

• Rinnai gas hot water system from a recognised hot water brand

• 6.1 Star equivalent energy rating

• Puretemp™ temperature stability technology

• Ideal for one-bathroom homes

Frequently Asked Questions

Can I buy the Rinnai Infinity B16 Natural Gas supply only?

Yes. You can buy the Rinnai Infinity B16 Natural Gas as a supply-only product where available if you already have a licensed gas fitter or plumber arranged. The unit-only price does not include installation, old system removal, disposal, valve kits, gas fitting work, plumbing alterations, gas pipe upgrades or compliance upgrades unless selected separately.

Can I get the Rinnai Infinity B16 Natural Gas installed in Brisbane?

Yes. Supply and install options may be available in selected Brisbane service areas. Complete the installation check to confirm whether the standard natural gas continuous flow installation option suits your property and whether additional add-ons may be required.

Can I get the Rinnai Infinity B16 Natural Gas installed in Gold Coast?

Yes. Selected Gold Coast service areas may be available. Installation suitability depends on access, natural gas supply, gas pipe sizing, water pressure, existing plumbing, valve requirements, clearances, electrical connection, compliance and selected add-ons.

Is installation included in the product price?

No. The main product price is the unit-only price. The installed-from price is shown separately so you can compare supply only against supply and install.

What does the installed-from price include?

The installed-from price is based on the Rinnai Infinity B16 Natural Gas unit plus the matching standard installation option. Final pricing may vary depending on valve kits, gas fitting work, pipework, access, compliance, old system removal or disposal selections and other selected add-ons.

Do I need a valve kit?

Many hot water replacements require compatible valves to meet installation and compliance requirements. The installation check helps identify whether a valve kit is recommended for your order.

Is this model natural gas or LPG?

This page is for the natural gas version of the Rinnai Infinity B16. The selected gas type must match the property before ordering or installation.

Can this Rinnai natural gas unit be installed indoors?

No. The Rinnai Infinity B16 Natural Gas is designed for external installation. It should not be installed internally.

What is the product code?

The Rinnai Infinity B16 product code is REU-BM1620W.

What flow rate does the Rinnai Infinity B16 provide?

The Rinnai Infinity B16 is listed at 16 L/min at a 25°C rise and 20 L/min at a 20°C rise.

How many bathrooms is the Rinnai Infinity B16 suitable for?

The Rinnai Infinity B16 is ideal for one bathroom and moderate hot water demand. Homes with higher demand may need a larger continuous flow model.

What is the energy rating?

The Rinnai Infinity B16 has a 6.1 Star equivalent energy rating.

What is Puretemp™?

Puretemp™ is Rinnai’s temperature stability technology, designed to help maintain steady hot water temperature even when flow conditions change.

Does the Rinnai Infinity B16 run out of hot water?

As a continuous flow system, the Rinnai Infinity B16 heats water on demand rather than storing it in a tank. It can keep producing hot water while gas, water and power supply are available and the demand stays within the unit’s capacity.

What is the minimum water pressure?

The Rinnai Infinity B16 lists a 120 kPa minimum water pressure.

What is the maximum water pressure?

The Rinnai Infinity B16 lists a 1000 kPa maximum water pressure.

What is the minimum operating water flow?

The minimum operating water flow is listed as 1.5 L/min.

What is the natural gas rate?

The natural gas rate is listed from 16 MJ/hr minimum to 124 MJ/hr maximum.

What are the connection sizes?

The Rinnai Infinity B16 lists 15mm hot water connection, 15mm cold water connection, and 20mm gas connection.

What are the dimensions?

The Rinnai Infinity B16 is listed at 531mm high, 351mm wide, and 202mm deep including brackets. Height including brackets is listed at 571mm.

How much does the Rinnai Infinity B16 weigh?

The listed unit weight is 13kg.

Does the Rinnai Infinity B16 need power?

Yes. The unit requires electrical power for operation. Electrical consumption is listed at 68W.

What factory default temperature is available?

The factory default temperature is listed as 50°C / 60°C, depending on model setup and application requirements.

Can I add controllers?

Yes. Optional compatible hot water controllers may be available for added convenience and temperature control, subject to correct installation.

What is the warranty on the Rinnai Infinity B16?

The Rinnai Infinity B16 has a 25-year extended heat exchanger warranty pathway, subject to participating in Rinnai’s scheduled service program and warranty terms. Other warranty terms should be checked against the current warranty documentation before purchase.

Is the Rinnai Infinity B16 Natural Gas good for replacing an old natural gas hot water system?

Yes. The Rinnai Infinity B16 Natural Gas can be a practical replacement option for selected external natural gas continuous flow hot water systems, provided the gas supply, water pressure, electrical connection, pipework, clearances and household hot water demand are suitable.

What is the difference between the Rinnai Infinity B16 Natural Gas and B20 Natural Gas?

The Rinnai Infinity B20 Natural Gas provides a higher flow rate than the B16 and may suit homes with greater hot water demand. The B16 is generally better suited to one-bathroom homes with moderate use, while the B20 can provide more capacity for larger demand where the gas supply and installation conditions are suitable.

What is the difference between natural gas and LPG versions?

The natural gas version is designed for homes connected to mains natural gas. The LPG version is designed for properties using bottled gas. The correct gas type must be selected before ordering or installation.

* Requested element size may come delivered separately to system for electric systems - All units supplied with factory with 3.6kW

**Where a unit supplied is capable of supplying more than 50°C, a tempering valve must be installed on the property or purchased as part of a valve kit with your order.

Hassle-Free Installation – Done Right by Trusted Experts

Need professional installation? We’ve got you covered! Our optional installation service connects you with our network of certified, trusted contractors, ensuring a smooth and stress-free setup.

How It Works:

🔹 Step 1: Select Installation Service
Choose to include professional installation when purchasing your new system.

🔹 Step 2: Pay for Installation Upfront
Simply add the installation service prior to adding your product to cart —no hidden fees, no surprises.

🔹 Step 3: We Assign a Certified Contractor
We’ll match you with a licensed, experienced contractor from our network to handle the installation.

🔹 Step 4: Schedule Your Installation
The assigned contractor will contact you directly to arrange a convenient time for installation.

🔹 Step 5: Direct Support When You Need It
For any installation-related questions, your contractor is your first point of contact. If any issues arise, our team is here to help.

🚨 Please Note: Installed Today supplies the product and connects you with a certified contractor for installation.

We’re committed to delivering top-quality products and facilitating a seamless installation experience. Have product questions? Reach out to us anytime! 🔥

Buying a new hot water system, water filter, pump or plumbing product should be simple. Installed Today helps you compare the product, the supply-only price and the available installation options in one place, so you can choose what suits your home, budget and timing without the back and forth.

Whether you already know exactly what you need or you are still comparing options, we make it easier to order with confidence.

Why Customers Choose Installed Today

Supply Only or Installed Options

Choose the product on its own, or add installation where available. This gives you the flexibility to buy the way that suits you best.

Clear Pricing Before Checkout

See your product price upfront, then add the installation options or common extras you need before placing your order. No confusing quote forms just to understand your starting price.

Product Details That Actually Help

Key specs, sizing details, warranty information, product features and suitability notes are shown clearly, so you can compare products properly before you buy.

Installation Add-Ons Available

Where relevant, you can add common installation extras such as valve kits, bases, electrical options, removal, access-related items or other site-specific upgrades before checkout.

Built Around Brisbane and Gold Coast Homes

Our product and installation options are selected with common local homes, water quality, plumbing layouts, access issues and replacement requirements in mind.

One Simple Order

Add the product and selected extras to cart in one order, instead of trying to organise separate suppliers, installers and parts.

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Designed To Make Your Decision Easier

Installed Today is built for customers who want a faster, clearer and more convenient way to buy.

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Choose supply only if you just need the product.

Choose supplied and installed if you want the product installed where available.

Add common extras before checkout if your job needs additional parts or site-specific options.

It is a simpler way to organise the product and the parts of the job that matter most.

Important Note

Installation availability, inclusions and add-ons vary by product type, site access, existing services, selected options and your property requirements. Some installations may require additional work, upgrades or checks before the job can proceed.

Fast & Reliable Delivery – What to Expect

Same Day Delivery: Available in Brisbane and Gold Coast on select units ordered before 8:00am
Express Delivery: 1–4 business days
Standard Delivery: 2–8 business days

Same Day Delivery

Same day delivery is available for selected hot water systems in Brisbane and Gold Coast metro areas when ordered before 8:00am, subject to stock availability, delivery capacity and suitable transport conditions.

Fast Metro Delivery

Most hot water orders in metro areas are delivered quickly, with around 90% arriving within 1 business day.

Weather Delays

Hot water systems cannot always be transported safely by courier during rain. Delivery timeframes may be affected when wet weather impacts safe handling, loading, unloading or transport conditions.

Express Delivery Guarantee

If your express delivery order takes longer than 1–4 business days, we will adjust the delivery timeframe to our standard 2–8 business days and refund your express shipping charge automatically.

Order Tracking

We will send your delivery details as soon as your order has been dispatched.

Need help with your delivery? Contact our team and we’ll be happy to assist.