Rinnai Infinity B20 LPG Continuous Flow Hot Water System

The Rinnai Infinity B20 LPG Continuous Flow Hot Water System is available online from Hot Water Outlet as a supply-only LPG gas hot water unit with metro delivery available in selected areas Australia wide.

Customers can purchase the Rinnai Infinity B20 LPG as a supply-only hot water system and request assistance arranging installation quotes after purchase through licensed local installers in selected metro regions.

The Rinnai Infinity B20 LPG is a compact external gas continuous flow hot water system designed for homes that want efficient on-demand hot water without a storage tank. With a 20 L/min flow rate at a 25°C rise, a 6.0 Star Equivalent Energy Rating and Puretemp™ temperature stability technology, it is a strong option for LPG properties needing a reliable replacement hot water unit.

About the Rinnai Infinity B20 LPG

The Rinnai Infinity B20 LPG heats water as it passes through the unit instead of storing hot water in a tank. This makes it suitable for homes wanting a compact outdoor system that only heats water when a hot tap is used.

This model is designed for LPG only. It is not interchangeable with natural gas unless the correct natural gas model is selected. The LPG version is commonly suited to properties using bottled LPG or existing LPG gas infrastructure, subject to gas supply sizing, regulator suitability and licensed gas fitting checks.

The B20 is generally suited to one-bathroom homes and may suit up to two bathrooms in warmer climates depending on water temperature, fixture flow rates, usage patterns and site conditions.

Buy Rinnai Infinity B20 LPG Supply Only

Buy the Rinnai Infinity B20 LPG supply only online from Hot Water Outlet if you already have a licensed plumber and gas fitter arranged for installation.

The product price is for the unit only. Installation, valve kits, old system removal, disposal, gas fitting changes, electrical work, pipework changes, pressure control, recess boxes, pipe covers and compliance upgrades are not included unless separately quoted.

Common search terms this product suits include:

• Rinnai Infinity B20 LPG price

• Rinnai B20 LPG hot water system

• Rinnai REU-BM2024W LPG

• 20 L/min LPG continuous flow hot water

• LPG instant gas hot water system

• Outdoor LPG hot water system

• Rinnai Infinity B20 supply only

Installation Quotes Available After Purchase

Hot Water Outlet does not directly provide installation services.

After purchasing the Rinnai Infinity B20 LPG Continuous Flow Hot Water System, customers in selected metro areas may request assistance arranging installation quotes through licensed local plumbers and gas fitters.

Installation quote availability depends on:

• service location

• installer availability

• LPG suitability

• gas supply requirements

• valve kit requirements

• access

• water pressure

• electrical connection

• outdoor location suitability

• compliance requirements

Additional installation costs may apply for:

• valve kit replacement

• old system removal

• disposal

• LPG regulator or gas supply changes

• gas pipe sizing upgrades

• electrical connection or power point requirements

• pipework changes

• recess box installation

• pipe cover installation

• restricted access

• water pressure control

• non-compliant existing installation

• relocation from the existing hot water position

Rinnai Infinity B20 LPG Delivery Brisbane

Hot Water Outlet offers metro delivery for the Rinnai Infinity B20 LPG Continuous Flow Hot Water System in selected Brisbane areas.

This model may suit Brisbane homes replacing an existing LPG continuous flow hot water system, especially where the current unit is externally mounted and the property already has suitable LPG supply available.

Rinnai Infinity B20 LPG Delivery Gold Coast

Hot Water Outlet offers metro delivery for the Rinnai Infinity B20 LPG Continuous Flow Hot Water System in selected Gold Coast service areas.

This system may suit coastal homes, townhouses, investment properties and LPG-connected homes needing a compact external hot water replacement.

Rinnai Infinity B20 LPG Delivery Sydney

Hot Water Outlet offers metro delivery for the Rinnai Infinity B20 LPG Continuous Flow Hot Water System in selected Sydney metro areas.

Customers can purchase the unit online and arrange installation separately or request assistance arranging installation quotes after purchase.

Rinnai Infinity B20 LPG Delivery Melbourne

Hot Water Outlet offers metro delivery for the Rinnai Infinity B20 LPG Continuous Flow Hot Water System in selected Melbourne metro areas.

Customers can order online and request assistance arranging installation quotes after delivery where available.

Is the Rinnai Infinity B20 LPG Right for Your Home?

This system may suit you if:

• you need an LPG continuous flow hot water system

• you are replacing an existing external LPG hot water unit

• you want a compact wall-mounted hot water system

• your home has one bathroom or possibly up to two bathrooms in warmer conditions

• you want a 20 L/min continuous flow unit

• you want a system with a 6.0 Star Equivalent Energy Rating

• you want temperature stability technology for more consistent hot water delivery

• your property has suitable LPG supply, water pressure, access and outdoor wall space

• you prefer supply-only purchase flexibility

Extra work may be required if:

• the existing unit is being moved to a new location

• gas pipe sizing does not suit the new appliance

• the LPG regulator or bottle setup needs changes

• existing valves are old, missing or non-compliant

• water pressure is outside the required range

• electrical work is needed for the unit

• pipework changes are required

• access is restricted

• the old system needs removal or disposal

• the existing position does not meet clearance or compliance requirements

• the home needs a larger model due to bathrooms, fixtures or usage patterns

Key Features of the Rinnai Infinity B20 LPG

• LPG continuous flow gas hot water system

• Product code REU-BM2024W

• 20 L/min flow rate at 25°C rise

• 24 L/min flow rate at 20°C rise

• Suitable for one bathroom and up to two bathrooms in warmer climates depending on conditions

• 6.0 Star Equivalent Energy Rating

• Puretemp™ temperature stability technology

• Compact outdoor wall-mounted design

• Status operation monitor

• Compatible with optional Rinnai hot water controllers

• Compatible with selected pipe covers, recess boxes and security brackets

• Minimum operating water flow of 1.5 L/min

• Minimum water pressure of 160 kPa

• Maximum water pressure of 1000 kPa

• LPG gas rate of 20–156 MJ/h

• Hot, cold and gas connection sizes of 20 mm

• Approximate unit weight of 14 kg

• 68 W electrical consumption

• Rinnai-listed 25-year extended heat exchanger warranty subject to scheduled servicing and warranty terms

Quick Specs

Brand: Rinnai
Range: Infinity B
Product: Infinity B20 LPG Continuous Flow Hot Water System
Product Code: REU-BM2024W
System Type: Gas continuous flow hot water
Gas Type: LPG
Installation Type: External outdoor installation
Recommended Household Size: Generally one bathroom, up to two bathrooms in warmer climates depending on conditions
Energy Rating: 6.0 Star Equivalent
Flow Rate at 25°C Rise: 20 L/min
Flow Rate at 20°C Rise: 24 L/min
Minimum Operating Water Flow: 1.5 L/min
Minimum Water Pressure: 160 kPa
Maximum Water Pressure: 1000 kPa
Gas Rate: 20–156 MJ/h LPG
Electrical Consumption: 68 W
Factory Default Temperature: 50°C / 60°C depending on model setup
Status Monitor: Yes
Connection Sizes: 20 mm hot, 20 mm cold, 20 mm gas
Dimensions: 531 mm high x 351 mm wide x 202 mm deep including brackets
Height Including Brackets: 571 mm
Weight: 14 kg
Warranty: 25-year extended heat exchanger warranty listed by Rinnai subject to scheduled servicing and warranty terms

LPG Continuous Flow Hot Water

The Rinnai Infinity B20 LPG is designed for properties using LPG gas. LPG systems are common in homes without natural gas connection, rural properties, acreage homes, granny flats, secondary dwellings and locations using bottled gas supply.

Because this is the LPG model, it must be matched to a suitable LPG supply. Gas type must be checked before ordering and installation. A natural gas model should not be substituted for LPG unless the correct appliance type is selected.

Continuous Flow Performance

The B20 heats water on demand when a hot tap is opened. This means there is no storage tank and no stored hot water capacity to recover after use.

Its 20 L/min flow rate at a 25°C rise makes it a practical choice for many smaller to medium homes. Actual performance depends on incoming water temperature, selected outlet temperature, pipework, fixture flow rates, gas supply and whether multiple outlets are used at the same time.

6.0 Star Equivalent Energy Rating

The Rinnai Infinity B20 LPG has a 6.0 Star Equivalent Energy Rating. Continuous flow systems can be efficient because they heat water only when needed, avoiding the standby heat loss that occurs with many storage tank systems.

Running costs still depend on household usage, gas pricing, outlet temperature, water temperature, fixture flow rates and installation setup.

Puretemp™ Temperature Stability Technology

Puretemp™ temperature stability technology helps maintain steadier hot water temperature during normal operation. This is useful for households wanting more consistent hot water delivery from a compact LPG continuous flow system.

Site conditions, fixture flow rates and correct installation still play an important role in overall hot water performance.

Compact Outdoor Design

The Rinnai Infinity B20 LPG has a slim wall-mounted design making it suitable for external installation where space is limited. It can be a strong replacement option when upgrading from an older external LPG continuous flow unit.

The final position must comply with clearance, access, flueing, drainage, gas and plumbing requirements.

No Stored Tank

Because the B20 is a continuous flow system, it does not store hot water in a cylinder. This can free up space compared with a traditional storage tank and may suit homes wanting a more compact replacement.

There is no tank capacity to size, but the flow rate must suit the home’s hot water demand.

Optional Hot Water Controllers

The Rinnai Infinity B20 LPG is compatible with optional Rinnai hot water controllers. Controllers can provide added convenience and temperature control where suitable.

Controllers are not included unless selected separately. Installation suitability and controller compatibility should be checked before purchase.

Outdoor Installation Only

This Rinnai Infinity B20 LPG model is for external outdoor installation. Do not install this unit internally unless a manufacturer-approved internal or flued model is specifically selected for that purpose.

Outdoor installation must still meet clearance, ventilation, flue terminal, gas, plumbing and electrical requirements.

Water Pressure Requirements

The Rinnai Infinity B20 LPG requires a minimum water pressure of 160 kPa and has a maximum listed water pressure of 1000 kPa.

If the property has high water pressure, pressure control may be required. If water pressure is too low, the unit may not operate correctly. Pressure should be checked as part of the installation assessment.

Gas Supply Requirements

The LPG gas supply must be suitable for the appliance demand. The B20 has an LPG gas rate range of 20–156 MJ/h.

A licensed gas fitter should confirm LPG bottle setup, regulator suitability, gas pipe sizing, appliance location and compliance requirements before installation.

Electrical Requirement

The Rinnai Infinity B20 LPG requires power for operation and has a listed electrical consumption of 68 W.

Electrical access must be suitable for the installation location. Electrical work is not included unless separately quoted.

Rinnai Infinity B16 vs B20 LPG

The Rinnai Infinity B20 LPG is a larger step up from the B16 LPG and may suit homes needing more hot water flow capacity.

The B16 is generally better suited to smaller homes or lower hot water demand. The B20 provides a higher 20 L/min flow rate at a 25°C rise, making it a stronger option where the household wants more flow capacity while still using a compact external LPG continuous flow system.

The right size depends on bathrooms, shower flow rates, incoming water temperature, number of users, LPG supply and whether multiple outlets are used at once.

Rinnai Infinity B20 vs B26 LPG

The Rinnai Infinity B20 LPG suits many one-bathroom homes and some warmer-climate homes with higher demand. The Rinnai Infinity B26 LPG is the larger option for households needing more flow capacity, more simultaneous outlet use or stronger performance for larger homes.

If the home has multiple bathrooms, high-flow fixtures or frequent simultaneous hot water use, a larger model may be more suitable than the B20.

Common Uses

The Rinnai Infinity B20 LPG Continuous Flow Hot Water System can be suitable for:

• LPG continuous flow hot water replacement

• external gas hot water system replacement

• one-bathroom homes

• smaller to medium family homes

• townhouses

• granny flats

• rental properties

• investment properties

• renovation projects

• homes using bottled LPG

• homes wanting compact wall-mounted hot water

• homes replacing older LPG instantaneous units

• homes wanting hot water heated on demand

Frequently Asked Questions

Can I buy the Rinnai Infinity B20 LPG supply only?

Yes. You can buy the Rinnai Infinity B20 LPG as a supply-only unit if you already have a licensed plumber and gas fitter arranged.

Does Hot Water Outlet install LPG hot water systems?

No. Hot Water Outlet does not directly provide installation services. Customers may request assistance arranging installation quotes after purchase in selected metro areas.

Can I get the Rinnai Infinity B20 LPG installed in Brisbane?

Customers in selected Brisbane areas may request assistance arranging installation quotes after purchase depending on location, access, site conditions and installer availability.

Can I get the Rinnai Infinity B20 LPG installed on the Gold Coast?

Customers in selected Gold Coast service areas may request assistance arranging installation quotes after purchase subject to service coverage and site suitability.

Is installation included in the product price?

No. The product price is for the unit only unless separately quoted. Installation, valve kits, disposal, old system removal, electrical work, gas fitting changes and other extras are not included unless arranged separately.

What gas type is this model?

This page is for the LPG version of the Rinnai Infinity B20. LPG and natural gas models are not interchangeable. Always select the correct gas type for your property.

Can the Rinnai Infinity B20 LPG be installed indoors?

No. This model is for external outdoor installation. Internal installation should only be considered with a manufacturer-approved internal or flued model designed for that purpose.

What flow rate does the Rinnai Infinity B20 LPG provide?

The Rinnai Infinity B20 LPG provides 20 L/min at a 25°C rise and 24 L/min at a 20°C rise.

How many bathrooms does the Rinnai Infinity B20 LPG suit?

It is generally suited to one bathroom and may suit up to two bathrooms in warmer climates depending on fixture flow rates, incoming water temperature, usage and site conditions.

What is the product code?

The listed product code is REU-BM2024W.

What are the water pressure requirements?

The listed minimum water pressure is 160 kPa and the maximum water pressure is 1000 kPa.

What is the minimum operating water flow?

The minimum operating water flow is 1.5 L/min.

What is the LPG gas rate?

The listed LPG gas rate is 20–156 MJ/h.

Does the Rinnai Infinity B20 LPG need power?

Yes. The unit requires electrical power for operation and has a listed electrical consumption of 68 W.

What are the dimensions?

The listed dimensions are 531 mm high x 351 mm wide x 202 mm deep including brackets. The height including brackets is listed as 571 mm.

What does it weigh?

The listed unit weight is 14 kg.

What is the energy rating?

The Rinnai Infinity B20 LPG has a 6.0 Star Equivalent Energy Rating.

Does it run out of hot water?

As a continuous flow system, it heats water on demand rather than relying on stored hot water. Ongoing hot water delivery depends on suitable gas supply, water flow, power, installation conditions and the unit being sized correctly for the home.

Can hot water controllers be added?

Optional Rinnai hot water controllers may be compatible. Controllers are not included unless selected separately.

Do I need a valve kit?

A valve kit may be required depending on the existing installation, local requirements and site condition. This should be checked before installation.

Is this a good replacement for an old LPG hot water system?

Yes. It may be a suitable replacement for an old external LPG continuous flow hot water system provided the gas supply, water pressure, location, clearances and compliance requirements are suitable.

What is the warranty?

Rinnai lists a 25-year extended heat exchanger warranty for the Infinity B20 subject to scheduled servicing and warranty terms. Always check the current warranty conditions before purchase.

* 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.

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Important Note

Product suitability can vary by property, existing services, energy source, gas type, available space, connection points, pressure requirements and local compliance requirements. Always check product specifications carefully and confirm the selected hot water system, valves, fittings and accessories are suitable for your property before ordering.

Standard Delivery: 2–8 business days

Express Delivery: 1–4 business days

90% of products are delivered the next business day where stock, postcode eligibility and freight availability allow.

Delivery timeframes are estimates and may vary by product, stock location, delivery postcode, carrier availability and order timing. Wet weather, storms, flooding or unsafe site access may delay delivery and are additional to any advertised or guaranteed freight timeframes.