Rheem Ultra 28L Internal Gas Continuous Flow Water Heater

SunCity Hot Water supplies, installs and services the Rheem Ultra 28L Internal 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 hot water system today with the Rheem Ultra 28L Internal Gas Continuous Flow Water Heater. Contact SunCity Hot Water for expert advice and assistance in choosing the right solution for your home’s needs. Enjoy continuous comfort and reliable hot water supply.

Call 1300 728 122

The Details

Key Features

Remote Temperature Controller Options

Optional remote temperature controllers allow convenient adjustment of water temperature for the kitchen, bathroom, and other areas, ensuring safety and comfort, particularly for households with children.

Indoor Installation

Designed specifically for indoor installation, the Ultra 28L integrates seamlessly with your home’s infrastructure. It requires appropriate flue components to meet Australian standards and maintain optimal performance while maximising space efficiency.

Natural Gas Compatible

Operating on natural gas, this unit provides a cost-effective and widely available energy source, delivering consistent hot water while supporting an environmentally conscious home.

Call 1300 728 122

Repairs · Servicing · Replacements

Is your Rheem Ultra 28L Internal 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

Advanced Safety Features

Flamesafe® Overheat Protection: Automatically shuts down the unit in case of overheating, providing peace of mind and enhanced household safety. Temperature Limiting: A preset 60°C limit reduces the risk of scalding while maintaining safe and comfortable water temperature.

Consistent Temperature Control

Rheem Q Factor™ technology ensures rapid and steady hot water delivery with minimal temperature fluctuations, supporting busy households with high hot water demands.

Consistent and Reliable Hot Water

Rheem Q Factor™ technology ensures rapid and steady hot water delivery with minimal temperature fluctuations, supporting busy households with high hot water demands.

Peace of Mind

Installation, Maintenance & Warranty

Installation

This indoor unit requires professional installation with suitable flue components. Correct installation ensures compliance with Australian standards, safe operation, and easy connection to your existing plumbing and gas systems.

Maintenance

Routine servicing by a qualified technician is recommended to maintain efficiency and longevity. This should include inspection of flue components, gas connections, burners, and temperature controls to ensure safe and reliable operation.

Warranty

For domestic installations, the system includes 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 unit requires a minimum flow rate of 1.5 litres per minute, ensuring efficient activation and reliable hot water delivery.

How much gas does the Rheem Ultra consume?

The nominal gas consumption is 205 megajoules per hour (MJ/hr), balancing efficient energy use with consistent hot water supply.

What is the maximum water supply pressure?

The Rheem Ultra can accommodate a maximum water supply pressure of 1000 kilopascals (kPa), ensuring reliable operation under high-pressure conditions.

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.

Trusted Brands