Rinnai Commerical HD28e Instant Gas Hot Water System | Supply+Install | LIFETIME WARRANTY - Water Heater - Gas Continuous Flow
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Rinnai Commerical HD28e Instant Gas Hot Water System | Supply+Install | LIFETIME WARRANTY

Hot water, hassle-free. This 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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βœ“ Installed hot water packages available in eligible JR Gas & Water service areas
βœ“ Free delivery included with eligible installed packages
βœ“ Licensed installation available across Brisbane, Logan, Redlands, Ipswich, Moreton Bay and Gold Coast service areas
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For instant gas continuous flow hot water installations with non-standard pipework, gas supply upgrades, LPG or natural gas requirements, tight access, relocation work, electrical power point requirements, or uncertainty around the correct unit size, our team can confirm the best option before you book.

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βœ” Service by Licensed Professionals  β€’  βœ” Fixed Price Services

🏷️ Brand:
πŸ”’ Model Number
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πŸ“¦ Volume
: L
πŸ“ Width: mm
πŸ“ Height: mm
🌍 Manufactured In:
πŸ› οΈ Heat Exchange Material
:
πŸ›‘οΈ Cylinder/Heat-Exchange Warranty
: Years
πŸ”‡ Noise Level: dBa
βš–οΈ Dry Weight: kg
πŸ“‘ WiFi Controller:
⏲️ Built-In Timer
:
πŸ’‘ LED/LCD Status Indicator
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πŸ“Š Coefficient of Performance (COP)
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⚑ Energy Source:
IMPORTANT
- Default supply is Natural Gas β€” please leave a note at checkout if LPG is required where available.

Rinnai HD28 External Installation in Brisbane & Gold Coast

The Rinnai HD28 External is a heavy duty gas continuous flow hot water system designed for commercial sites that need reliable, on-demand hot water without relying on a large standalone storage tank. It is an external commercial-grade unit built for higher-demand applications, making it a practical option for buyers comparing Rinnai HD28 External installed pricing, Rinnai HD28 External supply and install, or commercial hot water replacement in Brisbane. Like any heavy duty commercial continuous flow hot water system, the right result depends not just on the unit itself, but on whether the installation suits the site, gas supply, plumbing layout, and actual hot water demand.

What Is the Rinnai HD28 External?

The Rinnai HD28 External is a heavy duty gas continuous flow hot water system, which means it heats water on demand as it passes through the unit rather than storing heated water in a tank. It is a commercial external model designed for stronger heating output and heavier-duty use than a standard domestic continuous flow unit.

This model is typically used either as a standalone commercial hot water unit for lower to moderate commercial demand or as part of a larger commercial hot water arrangement where multiple units are manifolded together. That makes it a flexible option for projects that need either a single commercial water heater or a scalable setup for more demanding sites.

Why Choose the Rinnai HD28 External?

One of the main reasons people choose the Rinnai HD28 External is because it offers commercial-grade continuous flow hot water with strong output for demanding sites. That matters on commercial jobs where reliability, performance, and operating efficiency all count.

This model also suits sites that need a practical gas hot water system for regular commercial use rather than a domestic unit pushed beyond its intended purpose. It is well suited to commercial settings such as cafΓ©s, hair salons, laundries, childcare centres, amenity blocks, factories, and similar sites where dependable hot water supply is critical. Its external-only design also makes it practical where indoor plant room space is limited or where an external mounting location is the better fit.

Is the Rinnai HD28 External Right for Your Home?

The Rinnai HD28 External is generally not a standard residential hot water choice. It is better suited to commercial properties and larger-scale applications where heavier or more consistent hot water demand needs to be met with a robust gas continuous flow system.

It can be a strong fit for sites such as accommodation, commercial kitchens, laundries, amenities blocks, factories, childcare centres, and similar projects where hot water demand is higher than in a typical house. Whether it is the right fit depends on the site’s gas capacity, plumbing design, expected simultaneous demand, recirculation requirements, and whether a single unit or multi-unit setup is the better solution.

Final installation scope depends on what is already at the property. Some jobs are straightforward replacements, while others may require extra works. Depending on the site, that may include gas line upgrades, control integration, water pressure management, system design changes, manifolding, or relocation of the unit to a more suitable external position.

Why Choose a Quality Hot Water System Instead of a Cheaper Alternative?

A cheaper hot water system is not always the better result once installation suitability, reliability, efficiency, and actual demand are properly considered. In commercial hot water especially, choosing the wrong unit can create ongoing performance issues, poor supply during peak use, and expensive changes later.

The Rinnai HD28 External is designed as a genuine heavy duty continuous flow hot water system for commercial conditions, not just a standard domestic unit being used in a harder environment. The bigger issue is not simply the purchase price. It is whether the system is properly matched to the site and installed in a way that suits the building’s demand pattern.

Even a quality commercial unit can disappoint if it is undersized, installed without proper gas capacity, or used in a layout that really needs a different system design. That is why JR Gas & Water focuses on the right product and the right installation together.

Professional Rinnai HD28 External Installation in Brisbane & Gold Coast

JR Gas & Water provides professional Rinnai HD28 External installation in Brisbane & Gold Coast, with the installation assessed around the site’s existing hot water setup, gas supply, plumbing layout, external mounting location, and actual hot water demand. Whether it is a commercial hot water replacement in Brisbane or a hot water installation on the Gold Coast, the goal is to make sure the system fits the property properly rather than simply swapping one unit for another.

We also service surrounding areas including Logan, Ipswich, Moreton Bay and Redlands. Our approach is practical and installation-led. That means checking whether the gas supply is suitable, whether the building’s usage matches a heavy duty continuous flow unit, whether a single system or staged multiple-unit setup is needed, and what may need to change to complete the installation safely and compliantly.

What’s Involved in Installing the Rinnai HD28 External?

Installing the Rinnai HD28 External involves more than mounting a commercial unit on an outside wall. Because it is a heavy duty gas continuous flow hot water system, the installation needs to account for gas supply capacity, hot and cold water pipe connections, safe clearances, commissioning, and whether the system will operate as a standalone unit or as part of a broader commercial hot water arrangement.

In a standard installation scenario, the work may include removal of the old hot water system where applicable, mounting the new unit, connecting hot and cold water pipework, completing the gas connection, commissioning the unit, and testing operation. Depending on the site, that may also include gas upgrades, valve changes, control setup, manifolding, recirculation integration, pressure control items, or changes to suit the selected mounting position.

JR Gas & Water keeps the process practical and clear so customers understand what is standard, what may vary, and what may be needed for a safe and compliant installation. The final installation scope depends on what is already at the property, because some jobs are relatively straightforward while others need extra work to get the right result.

Why Choose JR Gas & Water?

JR Gas & Water is installation-led, which matters when you are choosing a commercial gas continuous flow hot water system. The real result depends on whether the system suits the property, the gas supply, the plumbing layout, the mounting location, and the way hot water is actually used across the site.

We work with real homes and commercial properties across Brisbane and the Gold Coast, helping customers choose the right setup for their site rather than relying on generic brochure claims. With a model like the Rinnai HD28 External, that means practical advice, realistic installation assessment, and a stronger focus on whether the unit is the right fit for the expected demand and available services.

Rinnai HD28 External Installation FAQs

How much does Rinnai HD28 External installation cost in Brisbane or the Gold Coast?

Installation cost depends on what is already at the property. A straightforward replacement in a suitable external location with an adequate gas supply is usually simpler than a job needing gas upgrades, plumbing changes, controls integration, or a more complex commercial redesign. Final pricing depends on the site, access, and what is required for a safe and compliant installation.

Is the Rinnai HD28 External right for my home?

The Rinnai HD28 External is generally better suited to commercial applications than to a standard home. It can be the right fit where the site has heavier or more consistent hot water demand and needs a heavy duty continuous flow system rather than a domestic hot water unit.

What is included in a standard Rinnai HD28 External installation?

A standard installation typically includes the core labour and materials needed to install the new unit in a suitable external location and connect it to existing services where conditions allow. That may include mounting the unit, plumbing connections, gas connection, commissioning, and operational checks. Extra works may still be required depending on the site.

Can the Rinnai HD28 External replace my current system?

In many cases, yes. It can replace an older commercial hot water unit where the property suits a heavy duty gas continuous flow system. Whether it is the right replacement depends on the gas supply, demand profile, plumbing layout, available location, and what is required to complete the installation properly.

Can JR Gas & Water install the Rinnai HD28 External in my area?

JR Gas & Water installs the Rinnai HD28 External across Brisbane and the Gold Coast, and also services Logan, Ipswich, Moreton Bay and Redlands. Availability depends on the job type, timing, and site conditions, but we regularly handle commercial hot water installation across these areas.

πŸ”₯ Instant Gas Hot Water System Package Selection Guide

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Choosing the right instant gas hot water system package depends on your current setup, whether plumbing or gas upgrades are needed, and if any relocation or compliance work is required. Use this guide to compare package levels and find the best match for your home.

We know things don’t always go to plan β€” and most customers aren’t plumbers β€” so we’re flexible and happy to adjust your installation package if needed.


πŸ’‘ Which Package Is Right for You?

IMPORTANT: All online packages are for EXTERNAL installations only. For internal installations, please request a quote.


βœ… Base – For compliant replacements of existing identical EXTERNAL instant systems
Best for like-for-like swaps where the existing system is fully compliant and the same make/model/series. No gas line changes, electrical work, or plumbing alterations.

🧰 Example: Replacing a Rinnai B26 with a Rinnai B26 on the same wall with compliant gas supply.


βœ… Silver – For minor upgrades
Includes small plumbing adjustments and a new valve kit. No gas line modifications or system disposal. Designed for customers on a budget upgrading to a slightly different model.

🧰 Example: Replacing a Rheem 26 with a Rinnai B26 where the gas line is compliant but pipework needs modifying to suit and valves need replacing for warranty.


πŸ† Gold – Best Seller – For standard installations
Covers everything needed for a standard upgrade: removal of old unit, plumbing changes, valves, and a tempering valve.

🧰 Example: Upgrading from an old Bosch 16P Instant to a new Bosch 16H that requires a tempering valve, with full plumbing refresh and removal of old unit.


πŸ’° Sapphire – Best Value – For installations requiring gas upgrades
Everything in the Gold package plus gas line upgrades or a new gas main from meter to unit to ensure safe and compliant installation.

🧰 Example: Switching from a smaller capacity like a 13L to a larger 26L instant system that needs a larger gas main and full plumbing setup.


βœ… Diamond – For major gas plumbing overhauls
Adds extended gas runs, upgraded regulators or meter connections and a new power point. Ideal for homes switching to gas or where old systems were severely non-compliant.

🧰 Example: Changing from electric to gas in a home with no current gas line in the right location, requiring a full line upgrade.


βœ… Platinum – The ultimate package
Includes everything: relocation, extensive plumbing, and full gas installation or rerouting. Ideal for complex installs or new system placements.

🧰 Example: Moving the hot water system to the opposite side of the home and running a new gas line with full setup and all compliance.


πŸ† Package Comparison Guide

Here’s your revised Package Comparison Guide with the new line added as the third row, directly under β€œExisting System Must Be Same Type & Location”:

Feature Base Silver Gold πŸ† Sapphire πŸ’° Diamond Platinum
βœ… Existing System Must Be Identical Make/Model as Purchase with Compliant Installation βœ… ❌ ❌ ❌ ❌ ❌
⚠️ Includes gas supply upgrade to suit larger capacity unit (e.g. 16L replaced with 16L or larger) ❌ ❌ ❌ βœ… ❌ βœ…
βœ… Existing System Removal & Form 4 (Compliance Certificate) βœ… βœ… βœ… βœ… βœ… βœ…
πŸ”§ Pipework Alterations ❌ βœ… βœ… βœ… βœ… βœ…
πŸ”§ Valve Kit ❌ βœ… βœ… βœ… βœ… βœ…
πŸ“ Pipework Included (m) ❌ 2m 4m 14m 4m 24m
🧱 Support Base (if ground is soft/uneven) ❌ ❌ βœ… βœ… βœ… βœ…
πŸ—‘οΈ FREE Old System Disposal (EXCLUDES ANY AND ALL ROOF MOUNTED COMPONENTS) ❌ ❌ βœ… βœ… βœ… βœ…
πŸ”§ Powerpoint ❌ ❌ ❌ βœ… βœ… βœ…
πŸ”₯ Gas Line Upgrade / New Gas Main ❌ ❌ ❌ βœ… ❌ βœ…
πŸ“¦ System Relocation ❌ ❌ ❌ ❌ ❌ βœ…
βœ… Requires Compliant Existing Install βœ… βœ… ❌ ❌ ❌ ❌

Β 

πŸ”§ Trusted Materials, Backed by Quality

We only use high-grade parts from reputable manufacturers:

  • Valves – AVG, RMC, Rye Metal

  • Copper Pipe – Kembla Type B, Crane

  • PEX Plumbing – Ezipex

  • Insulation – eFlex, K-Flex

  • Brassware – Brasshards

  • Gas Components – Bromic, EziPress, Viega

  • Sealants – Loxeal

Let us know if you have any specific brands or components you’d like us to use.


πŸ›  Need Help Choosing?

Still unsure which package is right for your home?
The JR Gas & Water team is here to help.

πŸ‘‰ Click here to contact us

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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