Dux Condensing Continuous Flow 21L

SunCity Hot Water supplies, installs and services the Dux Condensing Continuous Flow 21L across the Sunshine Coast, Brisbane, Bribie Island and Gympie — backed by our quality workmanship guarantee. Call 1300 728 122.

Upgrade your home with the Dux Condensing Continuous Flow 21L to enjoy efficient, reliable hot water. Contact SunCity Hot Water today to learn more and arrange your installation.

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The Details

Key Features

6.7 Star Equivalent Energy Efficiency Rating

The Dux Condensing Continuous Flow 21L delivers a 6.7-star equivalent energy efficiency rating, helping reduce energy consumption while providing a reliable supply of hot water. This high efficiency allows you to save on energy bills without compromising performance.

Continuous Hot Water Supply

Designed for Australian homes with 2 to 3 taps, this compact unit provides a continuous supply of hot water. It ensures comfort and convenience for your household at any time of day, even during peak usage.

Condensing Technology for Savings

Using innovative condensing technology, the Dux system captures extra heat through its stainless steel secondary heat exchanger, achieving over 90% thermal efficiency. Over the 12-year warranty period, this can result in potential savings exceeding $1,000.

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Repairs · Servicing · Replacements

Is your Dux Condensing Continuous Flow 21L not working?

No hot water, leaking or playing up? Don't rush to replace it — our licensed local technicians repair, service and replace Dux 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

Range Brochure Owners Manual Installers Guide Accessories Spec Sheet

Superior Condensing Technology

The Dux Condensing Continuous Flow 21L employs advanced condensing technology, capturing heat through a secondary heat exchanger to achieve outstanding thermal efficiency. This reduces energy consumption and helps lower running costs.

Two men in suits shake hands on a deck, a heater between them, with company banners in the background

Trusted Quality from Noritz

Manufactured by Noritz, a respected Japanese company renowned for household water heating solutions, this model combines expert craftsmanship with proven technology to deliver reliable, long-lasting performance.

Compact and Space-Saving Design

With its compact dimensions, the Dux Condensing 21L is ideal for homes with limited space. It can be installed in tight locations without compromising the delivery of hot water to your household.

Peace of Mind

Installation, Maintenance & Warranty

Installation

The Dux Condensing Continuous Flow 21L’s compact, space-saving design allows for straightforward installation in a variety of locations throughout your home. Its size makes it ideal for properties with limited space, providing convenience without compromising hot water performance.

Maintenance

The system includes a built-in condensate neutraliser to safely manage acidic condensate, protecting your plumbing and extending the lifespan of your water heater. Regular servicing in accordance with the manufacturer’s guidelines will help maintain optimal efficiency and reliable performance.

Warranty

The Dux Condensing 21L comes with a 12-year warranty on the heat exchanger and a 3-year comprehensive warranty covering all parts and labour, giving you peace of mind about durability and ongoing support.

FAQs

Frequently Asked Questions

What is the purpose of the inbuilt condensate neutraliser in the Dux Condensing Continuous Flow 21L?

The inbuilt condensate neutraliser manages the acidic condensate produced during heating by neutralising it before discharge, protecting your plumbing system and the environment while enhancing the hot water system's longevity.

How does the stainless steel secondary heat exchanger improve the performance of the hot water system?

The stainless steel secondary heat exchanger captures additional heat from the exhaust gases, allowing the system to achieve over 90% thermal efficiency. This process enhances hot water output while reducing energy consumption and operating costs.

Is the Dux Condensing Continuous Flow 21L suitable for my household size?

Yes, this model is designed for households requiring hot water delivery to 2 to 3 outlets, making it suitable for small to medium-sized homes. It efficiently supplies hot water for daily needs such as showers, dishwashing, and laundry.

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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