Rheem Commercial Continuous Flow - 27L External
SunCity Hot Water supplies, installs and services the Rheem Commercial Continuous Flow - 27L External across the Sunshine Coast, Brisbane, Bribie Island and Gympie — backed by our quality workmanship guarantee. Call 1300 728 122.
Contact SunCity Hot Water today to explore how the Rheem Commercial Continuous Flow - 27L External can meet your business's hot water needs with efficiency and reliability. Our experts are ready to assist you in selecting the perfect solution.

Key Features
6 Star Energy Efficiency
Rated 6 stars, this system helps businesses reduce energy costs while minimising environmental impact, making it an economical and sustainable choice for commercial operations.
Continuous Hot Water Delivery
With a steady output of 27 litres per minute, the Rheem 27L External meets the demands of busy commercial environments such as kitchens, cafés, and hospitality applications.
84% Energy Efficiency
Boasting 84% thermal efficiency, the unit optimises energy use, ensuring reliable hot water supply while maintaining cost-effective operation.

Reduced Water Wastage at Start-Up
The on-demand heating technology minimises water wastage by heating water only as it is needed. This improves resource efficiency and reduces operational costs.
High Temperature Delivery

Fuel Flexibility
Available in natural gas and propane variants, the Rheem 27L External can be configured to suit your business’s existing energy infrastructure.
Installation, Maintenance & Warranty
Installation

Professional installation is recommended to ensure compliance with local regulations and to achieve optimal performance. The external design allows for flexible integration with commercial buildings and existing gas systems.
Maintenance

Regular servicing is essential to maintain efficiency and prolong the unit’s lifespan. Periodic inspections by a qualified technician should include checks of the heat exchanger, burners, and safety controls.
Warranty
Heat Exchanger: 5 years commercial warranty. Parts and Labour: 12 months
Frequently Asked Questions
Does the Rheem 27L External include frost protection?
Yes, frost protection ensures reliable operation in colder conditions, preventing damage and maintaining consistent hot water delivery.
Can the Rheem 27L be used for sanitising applications?
Yes, the unit can deliver water up to 82°C, suitable for sanitising tasks and meeting hygiene standards in commercial environments.
What does the digital temperature display provide?
On Tankpak, Commpak, and Commpak Plus models, the digital display allows easy monitoring and precise control of water temperature, enhancing operational safety and efficiency.
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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