Rheem Ultra 28L Gas Continuous Flow Water Heater

SunCity Hot Water supplies, installs and services the Rheem Ultra 28L Gas Continuous Flow Water Heater across the Sunshine Coast, Brisbane, Bribie Island and Gympie — backed by our quality workmanship guarantee. Call 1300 728 122.

Upgrade your home hot water system with the Rheem Ultra 28L Gas Continuous Flow Water Heater from SunCity Hot Water. Contact us today to find out how this reliable and efficient heater can meet your household's needs.

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The Details

Key Features

Natural Gas and Propane Models Available

The Rheem Ultra 28L is offered in both natural gas and propane variants, providing flexibility to suit a range of household configurations while maintaining the same high-performance continuous flow technology.

Remote Temperature Controller Options

Remote temperature controllers allow you to set and adjust hot water temperatures conveniently for different areas, such as bathrooms and kitchens. This enhances safety, helps prevent scalding, and provides easy management of your household’s hot water needs.

Rheem Q Factor™

Equipped with Rheem Q Factor™, this unit delivers stable and consistent hot water temperatures during use. It ensures instant, reliable hot water for uninterrupted showers and household tasks.

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Repairs · Servicing · Replacements

Is your Rheem Ultra 28L Gas Continuous Flow Water Heater not working?

No hot water, leaking or playing up? Don't rush to replace it — our licensed local technicians repair, service and replace Rheem systems across the Sunshine Coast, Brisbane, Bribie Island and Gympie. We carry common parts, so many repairs are done the same day.

System Not Working? Call 1300 728 122 Get a Free Quote

Repair

Leaks, no hot water, element, thermostat and valve faults — diagnosed and fixed fast.

Service

Anode, valves and safety checks to keep your system running longer.

Replace

Past its best? We supply and install a new system, often the same day.

Product Documents

Install Instruction Rheem Plumbers HB RHM Ultra 28L Brochure

60°C Temperature Limit for Safety and Comfort

The preset 60°C temperature limit provides a safe and comfortable water temperature, reducing the risk of scalding while ensuring sufficient warmth for daily use.

Compact Design for Easy Installation

With dimensions of 560mm (H) × 343mm (W) × 260mm (D), the Rheem Ultra 28L is compact enough for a variety of outdoor locations. Its space-efficient design allows straightforward installation without compromising performance.

Full Mains Pressure for Multiple Outlets

Flamesafe® Overheat Protection for Peace of Mind

Rheem’s Flamesafe® technology automatically shuts down the water heater in the event of overheating, enhancing safety and reliability for your household.

Peace of Mind

Installation, Maintenance & Warranty

Installation

The compact design facilitates installation in a range of outdoor settings. Professional installation is recommended to ensure safety, optimal performance, and compliance with Australian standards.

Maintenance

Regular maintenance by a licensed professional is recommended to maintain efficiency and prolong the water heater’s lifespan. This includes inspection of gas connections, burner assembly, venting, and periodic flushing as advised by Rheem guidelines.

Warranty

For domestic installations, the system provides 15 years parts and 3 years labour coverage on the heat exchanger, along with 3 years parts and labour on all other components. For non-domestic installations, the heat exchanger and all other components are covered by a 1-year parts and labour warranty, ensuring reliable protection for both residential and commercial applications.

FAQs

Frequently Asked Questions

What is the minimum operating flow rate?

The minimum flow rate is 1.5 litres per minute, allowing the unit to activate and provide hot water even at low flow levels.

How much gas does the Rheem Ultra 28L consume?

Nominal gas consumption is 205 megajoules per hour (MJ/hr), sufficient for the hot water needs of larger households.

What is the maximum water supply pressure?

The unit can handle a maximum water supply pressure of 1000 kPa, compatible with most residential plumbing systems.

Is gas hot water cheaper than electric?

Gas hot water is often cheaper to run than peak-rate electricity, particularly for larger households. Continuous-flow gas only heats water on demand, avoiding the standby heat loss of a storage tank. Actual running costs depend on your gas rates and usage.

How does gas hot water work?

A gas hot water system burns natural gas or LPG to heat your water — either instantly as it flows through a continuous-flow (tankless) unit, or stored in a heated tank ready for use.

How long do gas hot water systems last?

Gas hot water systems typically last around 10–12 years with regular servicing. Continuous-flow units often last longer than storage models.

What size gas hot water system do I need?

Continuous-flow gas systems are sized by flow rate (litres per minute) based on how many hot water outlets run at once; gas storage systems are sized by tank capacity. SunCity will match the right unit to your household's peak demand.

How much does it cost to install a hot water system?

SunCity Hot Water quotes all-inclusive pricing — supply, installation by licensed plumbers and electricians, tempering and pressure-relief valves, removal of the old unit, QBCC fees and GST — with no hidden extras. Call 1300 728 122 for a fast quote.

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