ONSEN Natural Gas 26 Instant Gas Hot Water System | Supply+Install | LIFETIME WARRANTY -
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ONSEN NG 26 Instant Gas Hot Water System | Supply+Install | LIFETIME WARRANTY

Hot water, hassle-free. This Onsen is built for families who value reliability, efficiency, and peace of mind. With expert installation and unbeatable service, you’re in the best hands!
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  • Model: 26
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🏷️ Brand: Onsen
🔢 Model Number: 26
📦 Volume: L
📏 Width: mm
📐 Height: mm
🌍 Manufactured In:
🛠️ Heat Exchange Material:
🛡️ Cylinder/Heat-Exchange Warranty: Years
🔇 Noise Level: dBa
⚖️ Dry Weight: kg
📡 WiFi Controller:
⏲️ Built-In Timer:
💡 LED/LCD Status Indicator:
📊 Coefficient of Performance (COP):
⚡ Energy Source:
IMPORTANT - Default supply is Natural Gas — please leave a note at checkout if LPG is required where available.
ONSEN CONTINUOUS FLOW GAS HOT WATER

Onsen 26 Continuous Flow Gas Hot Water Installation Brisbane & Gold Coast

The Onsen 26 is a 26 litre-per-minute continuous-flow gas hot water system available in Natural Gas and LPG versions, with separate 50°C preset and 60°C adjustable configurations.

Onsen rates the system at 26L/min with a 25°C temperature rise, 198MJ/h gas consumption and a 6-star energy rating. The manufacturer describes the 26L range as suitable for a typical 1–2 bathroom home, with up to three bathrooms possible in warmer climates, subject to actual simultaneous demand and installation conditions.

The unit is designed for outdoor installation and combines a compact 570 × 394 × 166mm wall-mounted format with UV-protected external casing and anti-frost protection.

Quick answer: the Onsen 26 is a 6-star, 26L/min continuous-flow system available as ONHW26NG50, ONHW26LP50, ONHW26NG60 or ONHW26LP60. The 60°C models include an adjustable 37–60°C controller with a 10m cable, while the 50°C models are factory preset to a 50°C maximum.

Onsen 26 at a Glance

26L/min

Rated Flow

Manufacturer-rated flow at a 25°C water-temperature rise.

6 Star

Energy Rating

Continuous-flow operation heats water as it is required rather than maintaining a stored cylinder.

198MJ/h

Maximum Gas Input

The gas supply and pipework need to be capable of supporting the installed model under operating conditions.

19.3kg

Compact Wall Mount

570mm high × 394mm wide × 166mm deep.

Who Is the Onsen 26 Best For?

1–2 Bathroom Homes

Onsen describes the 26L model as suitable for one-to-two-bathroom homes, with up to three bathrooms possible in warmer climates where actual demand permits.

Existing Instant-Gas Replacements

The Onsen 26 can suit replacements where the existing wall position, gas supply, water connections, power provision and clearances can support the new appliance.

Natural Gas or LPG Properties

Separate factory models are available for Natural Gas and LPG. The correct gas-specific appliance must be selected for the property.

PRODUCT SUITABILITY

Is the Onsen 26 Right for My Home?

A Good Choice If...

You already use gas, want continuous hot water without a storage cylinder and need a 26L-class outdoor wall-mounted system.

Consider Another Option If...

Your household has very high simultaneous demand, you require more than the 26L category can comfortably deliver, or your property would require extensive gas infrastructure solely to install continuous-flow gas.

JR Should Check First If...

You are upgrading from a smaller gas appliance, converting from electric storage, relocating the unit, changing fuel type or are unsure whether the existing gas line can support 198MJ/h.

How Does the Onsen 26 Work?

Unlike a storage water heater, the Onsen 26 does not maintain a cylinder of heated water. When sufficient water flow is detected, the appliance fires its gas burner and transfers heat into the water passing through the unit.

Onsen lists a 2L/min minimum start-up flow and a 1.5L/min minimum maintained flow. Once demand stops, the burner stops rather than continuing to heat a stored volume of water.

This operating style avoids standing heat loss from a storage tank and allows hot water to continue while sufficient gas, water and appliance capacity remain available.

How it works: open a hot-water outlet → sufficient flow activates the appliance → the gas burner heats water passing through the unit → the burner stops when hot-water demand ends.

Onsen 26 50°C vs 60°C Models

Version Natural Gas LPG Temperature Controller
50°C Preset ONHW26NG50 ONHW26LP50 Maximum 50°C preset Not included as the standard 50°C configuration
60°C Adjustable ONHW26NG60 ONHW26LP60 Adjustable 37–60°C Included with 10m controller cable
50°C or 60°C? The correct option depends on the plumbing layout and intended outlets. A 60°C-capable installation can require compliant temperature limitation to personal-hygiene fixtures. The finished installation must suit the applicable plumbing requirements rather than simply selecting the hottest version.

Key Features of the Onsen 26

26L/min Flow Class

Rated at 26 litres per minute when raising incoming water temperature by 25°C.

6-Star Gas Energy Rating

Onsen rates both current 26L temperature configurations at six stars.

Natural Gas & LPG Models

Separate factory versions allow the product family to suit either compatible Natural Gas or LPG installations.

Anti-Frost Protection

Onsen specifies built-in anti-frost protection as part of the outdoor appliance design.

UV-Protected Outer Casing

The manufacturer describes the external casing as UV coated for outdoor use.

Optional Installation Accessories

Onsen offers accessories including a 26L recess box, flue diverter and anti-theft security bracket for suitable installations.

Onsen 26 Technical Specifications

Brand Onsen
System Type Outdoor continuous-flow gas hot water system
50°C Natural Gas Model ONHW26NG50
50°C LPG Model ONHW26LP50
60°C Natural Gas Model ONHW26NG60
60°C LPG Model ONHW26LP60
Rated Flow 26L/min at a 25°C temperature rise
Manufacturer Application Guide 1–2 bathroom home; up to 3 bathrooms in warmer climates, subject to demand
Energy Rating 6 stars
Gas Consumption 198MJ/h
NG Supply Pressure 1.13kPa minimum / 5.0kPa maximum
LPG Supply Pressure 2.75kPa minimum / 7.0kPa maximum
Minimum Start-Up Water Flow 2L/min
Minimum Maintained Water Flow 1.5L/min
Minimum Water Supply Pressure 200kPa
Maximum Water Supply Pressure 1000kPa
Gas Connection 20mm
Hot Water Connection 20mm
Cold Water Connection 20mm
Dimensions 570mm H × 394mm W × 166mm D
Weight 19.3kg
50°C Version Factory preset maximum 50°C
60°C Version Preset 60°C with adjustable 37–60°C controller
60°C Controller Cable 10m included
Installation Position Outdoor wall-mounted installation
Flow-rate context: 26L/min is specified at a 25°C temperature rise. The amount of hot water available under real operating conditions depends on incoming-water temperature, selected outlet temperature, supply pressure and simultaneous household demand.
INSTALLATION REQUIREMENTS

What Is Required to Install the Onsen 26?

Correct Natural Gas or LPG model selected for the property's actual fuel supply.

Gas supply capable of supporting 198MJ/h at the required appliance inlet pressure while other connected gas appliances are considered.

Water pressure within the manufacturer's 200–1000kPa range under the relevant installation conditions.

Outdoor mounting position suitable for the appliance and current gas-installation requirements.

Suitable wall support for secure mounting and future servicing access.

Correct hot, cold and gas pipework sized and arranged for the appliance and property.

Suitable electrical provision where required for appliance operation and protection functions.

Flue discharge clearances assessed against openings, boundaries and surrounding structures.

Compliant delivery-temperature arrangement selected for the 50°C or 60°C configuration.

Manufacturer and AS/NZS gas-installation requirements followed during installation and commissioning.

Gas sizing matters: replacing a smaller instantaneous system with a 26L / 198MJ/h appliance can require gas-pipe upgrades even when the existing unit is mounted in the same position.

Onsen 26 Installation Accessories

26L Recess Box

Onsen offers a purpose-designed recess box that can be incorporated into suitable wall construction to conceal the appliance connections and create a neater installation.

Flue Diverter

Onsen's stainless-steel flue diverter can redirect exhaust sideways where the approved installation requires assistance keeping flue discharge away from nearby structures or openings.

Anti-Theft Bracket

A manufacturer accessory is available to help secure compatible Onsen continuous-flow units in exposed installation positions.

What's Included With Onsen 26 Installation?

Selected Installation Package

The JR package selected above defines the standard labour and materials included for that installation pathway.

Testing & Commissioning

The installed system is connected and commissioned with gas, water and appliance operation checked for the completed scope.

Possible Additional Work

Gas-main upgrades, new electrical provision, relocation, extensive pipe alterations, unusual access or non-standard installation conditions can change the final scope.

How Much Does Onsen 26 Installation Cost?

Use JR's live product and installation selector above for current supplied-and-installed pricing. Package pricing varies according to the existing hot-water system, whether the replacement is like-for-like, required gas upgrades, plumbing changes, electrical provision and whether the system is being relocated.

JR's live Onsen 26 product currently uses Natural Gas as the default selection and advises customers to identify LPG where an LPG version is required and available.

Keeping pricing in the live selector avoids duplicating promotional prices, booking timeframes or package inclusions into the product description.

BRISBANE INSTALLATION

Onsen 26 Gas Hot Water Installation Brisbane

JR Gas & Water supplies and installs the Onsen 26 across eligible Brisbane service areas for suitable Natural Gas and LPG properties.

For Brisbane replacements, one of the most important checks is whether the existing gas service was sized for an appliance with a maximum input of 198MJ/h. An older 10L, 16L or lower-output gas heater can have significantly lower gas demand.

The final position must also satisfy outdoor appliance, flue-discharge, water-pressure and servicing-access requirements. A wall position that worked for an older appliance should therefore be assessed rather than automatically reused.

GOLD COAST INSTALLATION

Onsen 26 Gas Hot Water Installation Gold Coast

JR Gas & Water also installs the Onsen 26 across eligible Gold Coast service areas, including suitable continuous-flow replacements and gas hot-water upgrades.

Gold Coast properties can have strong seasonal differences in incoming-water temperature. Because the 26L rating is measured at a 25°C rise, actual simultaneous hot-water capacity should be matched to the home's bathrooms and normal usage rather than relying on litres-per-minute alone.

Outdoor position, coastal exposure, gas supply, flue clearance and future servicing access should all be considered as part of the finished installation.

Can the Onsen 26 Replace My Existing Hot Water System?

Replacing Continuous-Flow Gas

This is often the most direct pathway, but connection locations, gas input, power, water pressure and current compliance still need to suit the Onsen.

Replacing Gas Storage

A storage-to-continuous-flow conversion can require changed pipework, suitable wall mounting, electrical provision and gas-supply assessment.

Replacing Electric Storage

An electric-to-gas conversion normally requires a suitable gas supply or new gas main in addition to the continuous-flow water and electrical connections.

Replacing Solar Hot Water

Solar replacement can involve roof collectors, existing tank pipework, booster arrangements and additional decommissioning work outside a straightforward gas replacement.

Onsen 26 vs Onsen 30

The Onsen 26 is the Natural Gas/LPG 26L platform, while the larger Onsen 30 is positioned for greater simultaneous demand and is currently offered by Onsen as a Natural Gas model.

Specification Onsen 26 Onsen 30
Rated Flow at 25°C Rise 26L/min 30L/min
Manufacturer Bathroom Guide 1–2 bathrooms; up to 3 in warmer climates 2–3 bathrooms; up to 4 in warmer climates
Fuel Options Natural Gas or LPG Natural Gas
Gas Consumption 198MJ/h 235MJ/h
Energy Rating 6 stars 6 stars
Main Reason to Choose Lower gas input and LPG availability with strong 26L-class flow. Higher flow where the property and gas supply need greater simultaneous capacity.

Onsen 26 Efficiency, Flow & Everyday Performance

The Onsen 26 is rated at six stars and heats water only when sufficient flow activates the unit. This avoids the standing tank losses associated with keeping stored hot water at temperature.

The published 26L/min capacity should always be read together with the stated 25°C temperature rise. If incoming water is much colder or a higher outlet temperature is selected, the appliance must apply more heat to each litre of water.

Actual shower performance therefore depends on the water temperature entering the unit, the selected outlet temperature, shower-head flow, water pressure and how many outlets operate at the same time.

Performance takeaway: treat 26L/min as a rated operating point, not a guarantee that every combination of bathrooms and outlets can simultaneously receive 26L/min under all seasonal conditions.

Onsen 26 Warranty & Ownership

3 Years Parts & Labour

For domestic or household use, Onsen's warranty provides three years parts and labour on the hot-water unit from completion of installation, subject to the full warranty conditions.

10 Years Heat Exchanger

The domestic warranty adds seven further years parts-only coverage on the heat exchanger, providing a total 10-year heat-exchanger warranty.

1 Year Controller

Onsen's domestic warranty statement provides one year parts and labour on controllers.

Onsen's warranty requires installation, commissioning and servicing to follow the manufacturer's instructions and applicable standards. Proof of purchase and/or compliance documentation can be required for warranty validation.

Onsen's published warranty for non-domestic or non-household use is different from the domestic warranty and should be checked before specifying the product for a commercial application.

COMMON QUESTIONS

Onsen 26 Installation FAQs

How much does Onsen 26 installation cost?

Use JR's live product and installation selector above for current package pricing. Cost depends on whether the job is a like-for-like replacement, gas-line upgrade, conversion, relocation or another installation type.

What are the exact Onsen 26 model numbers?

The current models are ONHW26NG50 and ONHW26LP50 for 50°C preset operation, plus ONHW26NG60 and ONHW26LP60 for 60°C adjustable operation.

How much hot water does the Onsen 26 provide?

Onsen rates the system at 26L/min with a 25°C temperature rise. Actual available flow depends on incoming-water temperature, selected outlet temperature, water pressure and simultaneous demand.

How many bathrooms does the Onsen 26 suit?

Onsen describes the model as suitable for one-to-two-bathroom homes and up to three bathrooms in warmer climates. Actual sizing should be based on simultaneous outlet demand rather than bathroom count alone.

Is the Onsen 26 available in LPG?

Yes. Separate LPG models are available as ONHW26LP50 and ONHW26LP60. A Natural Gas appliance and LPG appliance are separate gas-specific models.

What is the difference between the 50°C and 60°C Onsen 26?

The 50°C model is preset to a maximum of 50°C. The 60°C version is preset to 60°C and includes a controller with a 10m cable, allowing adjustment between 37°C and 60°C at the appliance outlet.

Does the Onsen 26 include a temperature controller?

The current 60°C Onsen 26 models include the temperature controller with a 10m cable. The manufacturer lists the 50°C versions as fixed 50°C models.

Does the Onsen 26 have frost protection?

Yes. Onsen describes the outdoor 26L range as incorporating anti-frost protection. Correct power, installation and manufacturer operating requirements still need to be maintained for the protection system to function as designed.

What gas supply does the Onsen 26 require?

The appliance has a published gas consumption of 198MJ/h. Natural Gas inlet pressure is specified at 1.13–5.0kPa and LPG at 2.75–7.0kPa. The complete gas installation must be sized and commissioned correctly.

Can the Onsen 26 replace a smaller instant gas system?

Potentially, but upgrading from a smaller appliance can require gas-pipe changes because the new 26L unit may have significantly greater gas input. Water connections, power and clearances also need to be assessed.

What warranty does the Onsen 26 have?

For domestic use, Onsen provides three years parts and labour on the hot-water unit, plus a further seven years parts-only on the heat exchanger for 10 years total heat-exchanger coverage. Controllers have one year parts and labour, subject to the full manufacturer terms.

Can JR install the Onsen 26 in Brisbane or the Gold Coast?

JR Gas & Water supplies and installs continuous-flow gas hot-water systems across eligible Brisbane, Gold Coast and surrounding South East Queensland service areas. Final suitability depends on the property, fuel supply and installation scope.

Why Choose JR Gas & Water for Onsen 26 Installation?

JR Gas & Water provides hot-water supply, replacement and installation across eligible Brisbane, Gold Coast and surrounding South East Queensland areas.

For the Onsen 26, correct sizing, gas supply, fuel type, system position, flue clearances, water pressure, electrical provision, temperature control and commissioning all matter to the finished installation.

JR can assess the existing hot-water setup and match the live installation package to the actual property rather than assuming every 26L continuous-flow replacement has the same scope.

COMPARE YOUR OPTIONS

Compare Gas Hot Water & Replacement Options

These are current JR Gas & Water Hot Water main-menu destinations.

All Hot Water Systems → Instant Gas Hot Water Systems → Gas Storage Hot Water Systems → Hot Water Repairs & Servicing → Electric to Gas Hot Water → Hot Water Accessories →
READY TO INSTALL

Install the Onsen 26 With JR Gas & Water

The Onsen 26 is designed for suitable homes wanting 26L-class continuous-flow performance, Natural Gas or LPG compatibility, six-star efficiency and a compact outdoor wall-mounted system.

The main decision points are whether 26L suits the household's simultaneous demand, whether a 50°C or 60°C model is appropriate, whether the gas supply can support 198MJ/h and whether the existing installation position meets current requirements.

Use JR's live product area above for current product availability, gas configuration, installation-package pricing and booking options.

ZipPay – 6-Month Interest-Free on All Products

ZipPay allows you to buy now and pay later, offering flexible, interest-free payments for up to 6 months on all JR products. It’s easy to set up, and you can customize your repayment schedule to suit your budget. Payments can be made weekly, fortnightly, or monthly, with a $6 fee if the balance isn’t paid off by the due date​.

Humm – Up to 12 Months Interest-Free

Humm provides interest-free payment plans on purchases up to $30,000, perfect for both small and large buys. For items over $2,000, you can spread payments over 12 months. Humm also offers flexibility in scheduling payments based on when you get paid​

Afterpay – 8 Weeks, No Interest

With Afterpay, spread the cost of purchases across four equal installments, due every two weeks, over an 8-week period. There’s no interest, and as long as payments are made on time, there are no fees. Perfect for purchases between $100 and $1,500​

Plenti Finance – For Reclaim Systems Only

Plenti Finance is available exclusively for Reclaim Energy systems. This option offers tailored repayment terms with competitive interest rates, helping make eco-friendly choices more affordable. For more detailed information on Plenti’s terms and eligibility for Reclaim systems, visit the Reclaim Energy finance page​

If you're in Queensland and considering a new electric hot water system, JR Gas & Water is the company to choose. Here's why:

Experience and Expertise: JR Gas & Water has over 10 years of experience in the gas and plumbing industry. Their team of licensed and insured professionals is highly skilled and knowledgeable about all aspects of electric hot water system installation, maintenance, and repair. They can provide expert advice on the best system for your needs and ensure a smooth installation process.

Quality Products: JR Gas & Water uses only high-quality products from trusted brands to ensure your electric hot water system is reliable and efficient. They also offer a range of options to suit different budgets and requirements.

Competitive Pricing: JR Gas & Water offers competitive pricing for their electric hot water systems, ensuring that you get a great value for your investment. They also provide a detailed quote upfront, so there are no surprises or hidden costs.

Customer Service: JR Gas & Water is committed to providing excellent customer service. They are always available to answer any questions or concerns you may have and are committed to ensuring your satisfaction.

Local Business: JR Gas & Water is a locally owned and operated business in Queensland. By choosing them for your electric hot water installation, you are supporting a local business and contributing to the local economy.

Warranty and Guarantee: JR Gas & Water provides a warranty and guarantee on all their products and services, giving you peace of mind knowing that your system is covered in case of any issues.

Energy Efficiency: Electric hot water systems can be energy efficient, and JR Gas & Water can help you choose the right system for your needs. They can provide advice on energy-saving features and options, such as timers and thermostats, to help you save on your energy bills.

Safety: JR Gas & Water is committed to safety and ensuring that all installations are done to the highest safety standards. They are also familiar with local safety regulations and requirements, ensuring that your electric hot water system is installed safely and in compliance with all relevant codes.

JR Gas & Water is a reliable and experienced choice for your electric hot water system installation in Queensland. With a commitment to quality products, competitive pricing, excellent customer service, and safety, they can help you make the switch to a more efficient and cost-effective solution for your hot water needs. Contact them today to learn more about their services and how they can help you.

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