Description
Instant Hot Water, Compact And Efficient
The Dux Always Hot 21 Litre continuous flow hot water heater eliminates waiting for hot water. This non-condensing gas system heats water instantly as it flows, delivering 21 litres per minute of consistent hot water. Choose your preferred temperature preset—50°C or 60°C—and enjoy reliable performance in a compact outdoor design.
Penrith Hot Water supplies and installs the Dux Always Hot 21 Litre throughout Penrith, Emu Plains, Kingswood, and the Greater Nepean. Our team ensures professional outdoor installation and proper system configuration for your home.
Why Choose This Product?
• Instant hot water – Hot water on demand without storage tanks
• Compact flow rate – 21 L/min suits most household needs
• Temperature flexibility – 50°C or 60°C preset options available
• Fuel choice – Available in natural gas or LPG
• Energy efficient – 6.1-star rating demonstrates outstanding performance
• Outdoor design – Ideal for properties with suitable external space
• Premium construction – Quality heat exchanger built to last
• Extended heat exchanger warranty – 12-year protection on the core component
• Comprehensive parts warranty – 3-year coverage on parts and labour
• Proven reliability – Dependable continuous flow performance
• Local support – Penrith Hot Water manages supply and professional installation
Product Details
Type: Continuous flow hot water heater (non-condensing)
Capacity: 21 litres per minute
Fuel type: Natural gas or LPG (specify when ordering)
Temperature presets: 50°C or 60°C
Energy rating: 6.1-star
Installation: Outdoor only
Model numbers:
Natural gas 50°C: 21ENB5N
Natural gas 60°C: 21ENB5L
LPG 50°C: 21ENB6N
LPG 60°C: 21ENB6L
Note: Standard model is natural gas 50°C. Other models available by special order.
Technical Specifications
Heating method: Gas combustion (instantaneous flow)
Flow rate: 21 litres per minute
Temperature control: Preset 50°C or 60°C
Energy efficiency rating: 6.1-star
Heat exchanger: Premium non-condensing design
Installation: Outdoor wall-mounted location required
Performance: Unlimited hot water supply without storage limitations
Dimensions
Height (not including brackets): 520 mm
Width: 350 mm
Depth: 170 mm
The compact outdoor design fits neatly on exterior walls.
Warranty Information
Penrith Hot Water backs the Dux Always Hot 21 Litre with comprehensive protection:
• Heat exchanger: 12-year warranty
• Parts and labour: 3-year warranty
Warranty conditions apply. Contact Penrith Hot Water for full terms and conditions.
Delivery Information
We offer free delivery to the following regions:
• Penrith and Greater Nepean
• Sydney metro areas
• Wollongong
• Central Coast
• Newcastle
• Perth
• South East Queensland
Important: All deliveries must be within 50 km of a town with a population over 30,000.
If you’re located outside these areas, please phone us to check availability and discuss delivery options. Purchases outside our standard delivery zones will be refunded if free delivery cannot be provided.
Downloads
Dux range brochure
Dux Always Hot Continuous Flow owner’s manual
Ready to Upgrade?
Experience instant hot water with the Dux Always Hot 21 Litre continuous flow water heater. Perfect for homes in Penrith, Emu Plains, Kingswood, and the Greater Nepean seeking compact, energy-efficient performance.
Contact Penrith Hot Water today for a free quote and expert installation advice. Our team will discuss fuel options, temperature presets, and arrange professional outdoor installation at a convenient time.
Phone us now or request a quote online to get started.



