Dux Hot Water Systems from $569
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Dux Hot Water Systems
Compare Dux Proflo electric storage, Ecosmart heat pumps, Prodigy gas storage, Always Hot continuous flow and solar hot water by size, technology and current supply-only price.
Dux is an Australian hot-water brand dating back to 1915 and is now owned by Noritz. Its residential range spans Proflo electric storage, Prodigy gas storage, Always Hot continuous flow, Ecosmart heat pumps and Ecosmart solar. Many of Dux’s larger electric, gas-storage, solar and heat-pump water heaters are manufactured at its Southern Highlands facility.
Use this page as the main Dux hot water hub. Compare Proflo tank sizes, understand single- and twin-element electric storage, compare Ecosmart heat pumps, learn the difference between Prodigy gas storage and Always Hot continuous flow, check sizing and replacement considerations, and compare current Dux prices before ordering.
Dux Hot Water Range Explained
Dux covers several distinct hot-water technologies. Proflo is the electric storage family, Prodigy is gas storage, Always Hot is gas continuous flow, and Ecosmart covers heat-pump and solar products. Each family is sized differently, so litres, flow rate, recovery performance and site requirements need to be compared in the correct context.
25L to 400L electric storage, including a 125L narrow-diameter model and selected twin-element options.
200L and 285L integrated heat pumps plus the 270L Ecosmart Pro-Series.
135L and 170L gas storage in 4-star and 5-star versions.
Non-condensing 17–32L/min and condensing 21–26L/min on-demand gas systems.
Electric- and gas-boosted solar systems using roof collectors and insulated storage.
Dux Proflo Electric Hot Water Systems
Dux Proflo electric storage covers 25L, 50L, 80L, 125L, 125L narrow-diameter, 160L, 250L, 315L and 400L capacities. The range is designed around mains-pressure storage, with element options varying by model. Larger Proflo tanks use commercial-grade enamel and sacrificial-anode protection, while selected capacities are available with hard-water options.
50L, 125L & 160L
These sizes cover compact to medium-demand applications. The 50L is useful where space and demand are limited, while 125L and 160L step up storage for households requiring more reserve.
250L, 315L & 400L
These larger Proflo models are common family-replacement sizes. Dux lists the 250L as single element, while 315L and 400L are available in single- and twin-element versions in the broader range.
125L Narrow Diameter
The 125X model uses a slimmer 490mm diameter and V-Fit dual-handed connections. It is designed for locations where a standard 125L footprint is difficult to accommodate.
Single vs Twin Element
Twin-element storage uses a second upper boost element to recover a smaller volume of usable hot water faster after heavy demand. The electrical supply and tariff need to suit the selected model.
Do not assume two tanks with the same litre rating share the same height, diameter or connection positions. Compare the exact model and available space before ordering.
Dux Ecosmart Heat Pumps
Dux Ecosmart heat pumps use a refrigeration cycle to transfer heat from ambient air into stored water. The current family includes 200L and 285L Ecosmart models and the 270L Ecosmart Pro-Series. The 200L and 285L models use low-GWP R290 refrigerant and are designed and manufactured in Australia.
Ecosmart 200L
A compact integrated heat-pump option for lower to medium household demand. Dux lists a 2.5kW heating output, R290 refrigerant and a backup element for low-ambient and boost operation.
Ecosmart Pro 270L
The Pro-Series is the 270L high-recovery branch of the range. It is aimed at buyers wanting efficient heat-pump operation with strong recovery across changing weather conditions.
Ecosmart 285L
The 285L model increases stored capacity for households with greater daily demand while retaining an integrated heat-pump format.
What to Check Before Ordering
- Tank capacity and household demand
- Electrical connection
- Airflow and clearances
- Condensate drainage
- Noise-sensitive locations
- Recovery in local climate conditions
Dux Prodigy Gas Hot Water Systems
Dux Prodigy gas storage is available in 135L and 170L capacities with 4-star and 5-star models. The 4-star range focuses on strong recovery, while the 5-star range uses a flue-damper design to reduce heat loss. Both capacities are available in Natural Gas and propane/LPG versions.
Prodigy 135L
Dux positions the 135L Prodigy for roughly 2–4 people, depending on model and demand. It is useful for replacing older gas-storage systems where the existing gas supply and location remain suitable.
Prodigy 170L
The 170L increases stored reserve and is positioned for higher household demand. Dux lists the 170L 4- and 5-star versions for approximately 3–5 people.
4 Star vs 5 Star
The 5-star model uses improved insulation and a patented flue damper to reduce heat loss. The 4-star range remains focused on high recovery and practical replacement.
No Power Point Required
Current Prodigy gas-storage models use standing gas heating and Dux notes that they do not require a power point, so the system can continue to provide hot water during a power outage if gas and water remain available.
Dux Always Hot Continuous Flow
Dux Always Hot continuous-flow water heaters use Noritz gas technology and heat water as it is needed instead of storing a full tank. The non-condensing range includes 17, 21, 26 and 32L/min models, while condensing models are available in 21 and 26L/min.
| Model type | Flow rates | What it means | Key checks |
|---|---|---|---|
| Non-condensing | 17, 21, 26, 32L/min | Single heat exchanger; broad range from compact to high-flow demand. | Natural Gas/LPG, flow rate, 50°C or unlocked model, gas supply and outlets. |
| Condensing | 21, 26L/min | Dual heat exchanger captures additional exhaust heat for higher thermal efficiency. | Gas type, condensate disposal, installation location and flow requirement. |
Dux offers Natural Gas and LPG versions and temperature-locked 50°C or higher-temperature unlocked models across parts of the range. Choose flow rate based on simultaneous outlet demand and incoming water temperature rather than household size alone.
Dux Ecosmart Solar Hot Water
Dux Ecosmart solar systems use roof-mounted collectors to capture solar energy and transfer it into an insulated storage tank. Electric-boosted systems use an electric element for backup during cloudy periods or high demand, while gas-boosted systems use a continuous-flow gas booster that only fires when additional heat is required.
Solar hot water needs to be selected as a complete system. Collector area, roof orientation, shading, tank capacity, booster type and household demand all matter, so it is not simply a like-for-like cylinder swap.
What Size Dux Hot Water System Do I Need?
For storage systems, use actual hot-water demand rather than household size alone. A practical guide is around 40L per person per day for light use, 50L average, 65L high use and 80L very heavy use. Tariff and recovery then determine how much reserve is needed between heating periods. Gas continuous flow is sized differently and should be compared by L/min and simultaneous outlets.
A 250L can suit many average family households, while 315L provides additional stored reserve. The better option depends on daily usage, tariff, recovery, available space and whether the existing unit is already meeting demand.
How the Main Dux Hot Water Options Compare
| Dux type | Heating method | How to size | Main site checks | Common reason to choose it |
|---|---|---|---|---|
| Proflo Electric | Electric element heats stored water. | Tank litres + recovery. | Space, circuit, tariff, valves and drainage. | Simple electric storage replacement. |
| Ecosmart Heat Pump | Heat pump transfers heat from ambient air. | Tank litres + recovery + climate. | Airflow, noise, condensate, power and clearances. | Lower electricity use than standard resistive storage. |
| Prodigy Gas Storage | Gas burner heats stored water. | Tank litres + recovery. | Natural Gas/LPG, flue/location and existing gas supply. | Like-for-like gas storage replacement. |
| Always Hot | Gas heats water on demand. | Flow rate + simultaneous outlets. | Gas type, supply capacity, temperature and location. | Continuous hot water without a storage tank. |
| Ecosmart Solar | Solar collectors with electric or gas boost. | Tank + collectors + household demand. | Roof, sun, tank site and booster type. | Use solar energy for water heating. |
Replacing an Existing Dux Hot Water System
The simplest replacement usually keeps the same technology and energy source, then matches capacity, dimensions and connections as closely as practical. Moving to a different technology can still make sense, but it adds more installation checks.
Record model number, capacity, energy source, element/gas type and dimensions.
Consider showers, baths, simultaneous use and whether the current system regularly runs out.
Check water, power or gas, valves, drainage, base, clearances and access.
Stay like-for-like or compare heat pump, gas continuous flow or solar if priorities have changed.
Dux 250L to Dux 250L
Start with the current Proflo 250L, then compare height, diameter, element rating and tariff rather than assuming every 250L is a direct swap.
Dux 250L vs Dux 315L
Moving to 315L increases stored reserve but also changes physical size and standing heat loss. Upsize only when household demand justifies it.
Proflo to Ecosmart Heat Pump
This can reduce electricity use, but introduces airflow, condensate, acoustic, electrical and clearance requirements that a basic cylinder does not have.
Gas Storage to Always Hot
This removes the storage tank but changes sizing to L/min and can require changes to gas supply, power, pipework and appliance location.
Will the New Dux Suit the Existing Location?
Check the exact model rather than relying on capacity alone. Dux Proflo dimensions vary substantially across 80L, 125L, 160L, 250L, 315L and 400L tanks, and the 125L narrow model deliberately uses a different shape. Also check connection height, valve arrangement, drainage, electrical supply or gas type, service access and the path required to remove the old tank.
Dux publishes different anode options for average-to-hard and extremely hard water areas across parts of its electric and gas storage range. Water quality therefore matters when maintaining or replacing a Dux storage system.
Dux Hot Water System Prices
Compare the current unit price, then open the product to check stock, specifications, delivery and optional parts.
| Dux system | Current price | Purchase type | |
|---|---|---|---|
| Dux 50L Electric Hot Water System | $569 | Supply only | View |
| Dux 125L Electric Hot Water System | $909 | Supply only | View |
| Dux 160L Electric Hot Water System | $1,049 | Supply only | View |
| Dux 250L Electric Hot Water System | $1,169 | Supply only | View |
| Dux 315L Electric Hot Water System | $1,309 | Supply only | View |
| Dux 400L Electric Hot Water System | $1,659 | Supply only | View |
| Dux Ecosmart 200L Heat Pump Hot Water System | $3,839 | Supply only | View |
| Dux Ecosmart Pro 270L Heat Pump Hot Water System | $4,009 | Supply only | View |
| Dux Ecosmart 285L Heat Pump Hot Water System | $4,059 | Supply only | View |
Product price only. Delivery, valves, fittings, pipework, installation and other extras are separate unless expressly included with the selected product.
Dux Warranty & Maintenance
Dux warranty periods vary by product family and component. Current larger Proflo electric tanks list 10-year tank coverage with separate parts-and-labour periods, while smaller 25L/50L models list different tank coverage. Prodigy gas storage, Always Hot continuous flow and Ecosmart heat pumps also have their own warranty structures.
Proflo Anodes
Dux enamelled storage cylinders use sacrificial anodes as part of their corrosion-protection system. Dux publishes different replacement anodes for average-to-hard and extremely hard water conditions.
Always Hot Heat Exchanger
Dux continuous-flow warranty treats the heat exchanger separately from general parts and labour. Keep the exact model and serial number for service and warranty identification.
Heat Pump Components
Ecosmart heat pumps combine a storage cylinder, refrigeration components, controls and a backup element. Coverage can differ across these components.
Valves & Safety Components
Pressure and temperature relief valves are safety components. Continuous leakage, unusual discharge or failed pressure control should be assessed by a licensed plumber.
Common Dux Hot Water Problems & Replacement Signs
A Dux system with no hot water does not automatically need replacement. Electric storage can have element, thermostat, tariff or power-supply faults; gas systems can have ignition or supply issues; heat pumps add refrigeration, sensor and control faults. A leaking cylinder, severe corrosion, repeated breakdowns or a system that no longer meets demand are stronger replacement indicators.
No Hot Water
Confirm whether the system has the expected electricity or gas supply. Licensed electrical, gas and refrigeration diagnostics should be handled by the appropriate trade.
Hot Water Runs Out
Storage capacity, recovery, tariff windows, failed elements or increased household demand can all reduce available hot water.
Water Around the Tank
Identify whether the source is a relief valve, connection or cylinder. A leaking tank body is a more serious replacement indicator than normal intermittent relief-valve discharge.
System Is Very Old
Age alone does not prove failure, but corrosion, repeated faults, poor recovery and cylinder leakage become more important as the system gets older.
Buying a Dux Hot Water System Supply Only
Choose the Dux system first, then check delivery and add only the valves, pipework, fittings or accessories required for the job. For a replacement, the old model number, system type, capacity, energy source and a clear photo of the existing installation make product matching much easier.
Dux Hot Water System Questions
Answers to common Dux price, Proflo, Ecosmart, gas, sizing, replacement, delivery and warranty questions.