Dux Hot Water Systems Review: Pros, Cons and What to Check Before Ordering

Apr 15, 2023

Dux hot water systems are a familiar name in the Australian hot water market, especially for homeowners comparing electric storage tanks, heat pump options and practical replacement systems. But like any hot water brand, Dux should not be chosen on brand name or upfront price alone.

The right hot water system depends on your household size, number of bathrooms, energy source, installation location, daily hot water demand, warranty expectations, access, valves, electrical requirements, gas requirements and whether you are ordering supply only or choosing a supplied-and-installed option where available.

This Dux hot water systems review looks at where Dux can make sense, where you need to be careful, and when it may be worth comparing other brands such as Rheem, Rinnai, Vulcan and Aquamax.

You can compare Dux hot water systems and other hot water systems online with Installed Today.

Quick answer: are Dux hot water systems worth considering?

Dux hot water systems can be worth considering if you want a familiar brand, a practical electric storage replacement, a common tank size, or a system that suits an existing installation location.

However, Dux may not be the best choice for every home. Before ordering, compare:

Tank size
Energy source
Household demand
Installation location
Warranty terms
Installer requirements
Access
Valves and fittings
Old unit removal
Disposal
Electrical or gas work
Heat pump location requirements
Available alternatives
Supply-only vs supplied-and-installed options

A Dux hot water system should be chosen because it suits the property, not just because it is available or competitively priced.

What is a Dux hot water system?

A Dux hot water system is a hot water unit made for residential and light commercial hot water use. Depending on the range available, Dux systems may include electric storage tanks, heat pump systems, gas storage options and selected gas hot water products.

For many Australian homes, Dux is most commonly compared as an electric storage hot water replacement.

Dux systems may suit:

Homes replacing an existing electric storage tank
Units and townhouses
Rental properties
Family homes
Renovations
Supply-only customers with their own licensed installer
Customers wanting a familiar hot water brand
Homes needing a common storage tank size

The key is choosing the right model, size and installation pathway.

Dux hot water system pros

Dux can be a practical option for some homes. Common advantages include:

Familiar Australian hot water brand
Common residential storage tank sizes
Electric storage options for like-for-like replacement
Heat pump options for efficiency-focused upgrades
Practical sizing for homes, units and rentals
Suitable for supply-only ordering where you have your own licensed installer
Competitive product options in some categories
Straightforward replacement pathway where the existing system type and location suit

For simple electric storage replacements, Dux can be a reasonable product category to compare against other brands.

Dux hot water system cons

Dux may not suit every customer or every property.

Potential drawbacks to consider include:

Not always the cheapest total replacement once installation extras are included
Warranty experience can depend heavily on correct installation and documentation
Some homes may be better suited to another brand, size or system type
Heat pump models need suitable outdoor location, airflow, drainage and noise placement
Changing from storage to instant gas can add installation complexity
Supply-only ordering still requires your own licensed installer
Incorrect sizing can lead to running out of hot water
Incorrect gas type or electrical setup can delay installation
DIY-style hot water replacement is not suitable for plumbing, gas or electrical work

The biggest risk is not the brand itself. It is choosing the wrong system, wrong size, wrong energy source or wrong installation pathway.

Dux electric hot water systems

Dux electric hot water systems are commonly compared for like-for-like storage tank replacement.

An electric storage system heats water in a tank and stores it ready for use. This can suit homes that already have electric storage hot water and want a practical replacement without changing energy source.

Dux electric hot water may suit:

Existing electric storage replacements
Units
Townhouses
Rental properties
Family homes
Homes without gas
Customers wanting stored hot water
Supply-only orders with a licensed installer arranged

Compare Dux models with other electric hot water systems before ordering.

What size Dux electric hot water system do you need?

The right size depends on household demand, not just the old tank size.

Common sizing considerations include:

Number of people
Number of bathrooms
Shower habits
Bath use
Laundry use
Dishwasher use
Peak morning or evening demand
Whether the home is owner-occupied, rented or short-stay accommodation
Whether the old system regularly ran out of hot water
Whether off-peak heating applies

If your old system ran out often, replacing it with the same size may repeat the problem.

Dux 125L electric hot water systems

A 125L Dux electric hot water system may suit smaller homes, units or low-use households where daily demand is modest.

It may suit:

One to two people
Small units
Granny flats
Compact homes
Lower shower demand
Simple like-for-like replacement

It may not suit larger families, homes with long showers, or properties with multiple bathrooms.

Dux 160L electric hot water systems

A 160L Dux electric storage system may suit small to medium households wanting more capacity than a compact tank.

It may suit:

Two to three people
Small family homes
Townhouses
Units with higher usage
Homes where 125L may be too small

Check household demand carefully before choosing 160L, especially if the home has more than one bathroom.

Dux 250L electric hot water systems

A 250L Dux electric hot water system is often compared for family homes and rental properties.

It may suit:

Moderate family demand
Homes with regular showers
Properties with one to two bathrooms
Rental homes needing practical capacity
Like-for-like electric storage replacement

If the home has high hot water demand, a larger tank or different system type may be worth comparing.

Dux 315L electric hot water systems

A 315L Dux electric hot water system may suit larger households or homes where the existing 250L system was not enough.

It may suit:

Larger families
Multiple occupants
Higher shower demand
Some two-bathroom homes
Rental properties with higher likely usage

Before ordering, check dimensions, access and whether the installation location suits the larger unit.

Dux 400L electric hot water systems

A 400L Dux electric storage system may suit high-demand households.

It may suit:

Large families
High shower use
Multiple bathrooms
Homes with baths
Short-stay properties
Larger rental homes

A 400L system is physically larger and heavier, so access, base condition, pipework and electrical suitability should be checked before ordering.

Dux heat pump hot water systems

Dux heat pump hot water systems may suit customers wanting a more efficient electric hot water option than standard electric storage.

A heat pump uses electricity to draw heat from the surrounding air and transfer it into the stored water. This can reduce energy use in suitable conditions, but heat pumps need more planning than a simple electric storage replacement.

A Dux heat pump may suit:

Homes replacing an old electric storage tank
Properties with suitable outdoor space
Homes with good airflow around the unit
Customers wanting an electric upgrade
Homes with suitable drainage
Properties where noise placement is acceptable
Customers comparing long-term running cost

Compare Dux heat pump options with other heat pump hot water systems before ordering.

What to check before choosing a Dux heat pump

Before choosing a Dux heat pump, check:

Outdoor location
Airflow clearance
Condensate drainage
Electrical requirements
Noise position
Access for delivery
Base or slab condition
Tank size
Recovery rate
Household usage
Warranty terms
Installation availability
Current rebate or incentive rules if relevant

Heat pumps are not automatically the best choice for every home. The site needs to suit the product.

Dux gas hot water systems

Depending on the available range and property setup, Dux gas hot water may be compared by customers replacing gas storage or considering gas hot water options.

Gas hot water can suit homes already set up for natural gas or LPG, but gas type must be checked carefully.

Before ordering any gas hot water system, confirm:

Natural gas or LPG
Existing gas supply
Gas pipe sizing
Water pressure
Outdoor clearances
Electrical requirements
Existing unit type
Valve requirements
Licensed gas fitter availability

Natural gas and LPG are not interchangeable. Choosing the wrong gas model can delay installation and create extra cost.

Compare options in gas hot water systems and instant gas hot water systems.

Dux vs Rheem

Dux and Rheem are both recognised names in Australian hot water, but the better choice depends on the product type, size, warranty, installation requirements and household demand.

Dux may appeal to customers wanting a familiar storage-style replacement, while Rheem is often compared by customers looking across broad electric, gas and heat pump categories.

When comparing Dux vs Rheem hot water systems, check:

Tank size
Product range
Warranty terms
Installation location
Element rating
Energy source
Dimensions
Availability
Price
Replacement suitability

Do not choose by brand alone. Choose by property fit.

Dux vs Rinnai

Dux and Rinnai are often compared by customers looking at hot water replacement options.

Rinnai is commonly considered across electric storage, gas continuous flow and heat pump hot water systems, while Dux is often compared for practical electric storage and selected heat pump options.

When comparing Dux vs Rinnai hot water systems, check:

Storage vs continuous flow preference
Household demand
Gas availability
Natural gas or LPG
Flow rate for gas systems
Tank size for storage systems
Installation requirements
Warranty terms
Product price and total replacement cost

For gas homes, Rinnai instant gas options may be worth comparing closely against storage-style alternatives.

Dux vs Vulcan

Dux and Vulcan may both be compared by customers wanting practical hot water replacement options.

Vulcan hot water systems may appeal to customers looking for straightforward value-focused hot water systems, while Dux may suit customers who prefer the Dux range or are replacing an existing Dux unit.

Compare:

Tank size
Product price
Warranty terms
Dimensions
Installation location
Household suitability
Running cost considerations
Availability

For rental properties, value, reliability, sizing and simple operation often matter more than brand name alone.

Dux vs Aquamax

Dux and Aquamax are often compared by customers considering storage hot water systems.

Aquamax hot water systems may suit customers comparing electric or gas storage options, while Dux may suit customers wanting a common electric storage replacement or Dux-specific product.

Compare:

Cylinder material
Tank size
Gas or electric options
Warranty terms
Installation location
Household usage
Product dimensions
Replacement suitability

The best choice depends on the home and the installation setup.

Should you choose Dux for a rental property?

Dux can be suitable for rental properties where the system is correctly sized and installed by a licensed professional.

For rentals, consider:

Likely tenant demand
Number of bedrooms
Number of bathrooms
Future occupancy
Simple operation
Warranty terms
Product availability
Replacement cost
Installer access
Long-term maintenance
Whether the property needs supply only or supplied-and-installed where available

A small tank may be cheaper upfront but could create tenant complaints if demand is higher than expected.

Should you choose Dux for a family home?

Dux may suit a family home if the selected model has the right capacity and the installation location suits.

For family homes, check:

People in the home
Shower frequency
Teenagers
Bath use
Morning and evening peak demand
Number of bathrooms
Whether the old system ran out
Tank recovery
Available space
Energy source

A family home should not be sized purely from the old tank label. If the old system was not keeping up, compare a larger size or different system type.

Should you choose Dux for an Airbnb or short-stay property?

Dux may suit short-stay accommodation if the system is correctly sized for maximum guest occupancy.

For Airbnb and short-stay homes, consider:

Guest count
Number of bathrooms
Back-to-back showers
Laundry use between stays
Bath use
Reliability
Simple operation
Fast recovery
Guest comfort
Maintenance access

Hot water complaints can affect guest experience, so do not undersize the system to save upfront.

Supply only Dux hot water systems

Supply-only ordering can suit customers who already have their own licensed plumber, electrician or gas fitter arranged.

Supply only may suit:

Builders
Renovators
Property managers
Landlords
Trade customers
Customers outside supplied-and-installed service areas
Customers replacing like-for-like systems
Customers arranging their own installation

Supply-only product pricing generally does not include installation, valves, old unit removal, disposal, electrical work, gas work, pipework changes, drainage work, access upgrades or compliance upgrades unless those items are clearly selected or included.

Before ordering supply only, your licensed installer should confirm the Dux product suits the property.

Supplied-and-installed Dux hot water systems

Supplied-and-installed options may be available on selected products in eligible Brisbane and Gold Coast service areas where shown.

This may suit customers who want the product and installation pathway arranged together instead of buying the unit separately.

Before ordering supplied and installed, check:

Service area eligibility
Existing system type
Product suitability
Installation inclusions
Valve requirements
Old unit removal
Disposal
Electrical work
Gas work
Drainage
Access
Pipework changes
Compliance upgrades

Do not assume every extra is included. Check the product page and selected options carefully.

Professional installation matters

Hot water systems should be installed by the right licensed professional.

Depending on the system, this may involve:

Licensed plumber
Licensed electrician
Licensed gas fitter
Compliance checks
Tempering valve requirements
Pressure control
Drainage
Safe discharge
Gas compliance
Electrical compliance
Manufacturer installation requirements

DIY hot water installation can create safety, warranty, insurance and compliance problems. This is especially important for gas, electrical and pressure vessel work.

What to check before ordering a Dux hot water system

Before ordering, check:

Current brand and model
Current tank size
Energy source
Natural gas or LPG if gas
Indoor or outdoor location
Dimensions
Connection positions
Number of people in the home
Number of bathrooms
Whether the old system ran out
Access for delivery
Base or stand condition
Valve condition
Electrical requirements
Gas requirements
Drainage requirements
Old unit removal needs
Supply-only or installation option

This helps avoid choosing the wrong model.

Common mistake: choosing Dux only because it is available

Availability matters, but it should not be the only reason to choose a hot water system.

Check whether the Dux model actually suits:

Household demand
Installation location
Energy source
Space
Access
Warranty expectations
Total replacement cost

If another brand or system type is a better fit, compare before ordering.

Common mistake: replacing the same size when the old system was too small

If the old Dux system regularly ran out of hot water, replacing it with the same size may repeat the issue.

Consider a larger tank, different tariff setup, heat pump option, gas system or another product type if demand has changed.

Common mistake: ignoring total installed cost

The product price is only one part of the total cost.

Extra costs may include:

Valves
Disposal
Old unit removal
Electrical work
Gas work
Pipework changes
Drainage work
Access issues
Base work
Compliance upgrades

Always compare the product and the installation pathway together.

Common mistake: choosing heat pump without checking the location

A Dux heat pump needs a suitable location.

Check:

Airflow
Outdoor space
Condensate drainage
Noise placement
Access
Electrical suitability
Base condition
Household demand

A heat pump may not suit tight, enclosed, poorly drained or noise-sensitive spaces.

Common mistake: choosing gas without checking gas type

Natural gas and LPG are different.

Before ordering a gas system, confirm:

Existing gas type
Product model
Gas pipe sizing
Outdoor clearances
Installer approval

The wrong gas type can delay installation and create extra cost.

Common mistake: assuming warranty covers every issue

Warranty coverage depends on the product, installation, maintenance, water quality, correct use and manufacturer terms.

Before ordering, check:

Cylinder warranty
Parts warranty
Labour coverage
Installation requirements
Exclusions
Proof of purchase
Licensed installation documentation
Maintenance requirements

A warranty is only useful if the system is correctly selected, installed and documented.

Final verdict: should you buy a Dux hot water system?

A Dux hot water system can be a practical option when the model, size and installation requirements suit the home. Dux is worth comparing for electric storage replacement, selected heat pump upgrades and customers wanting a familiar hot water brand.

However, Dux should not be chosen only because it is available or appears cheaper upfront. Compare it against Rheem hot water systems, Rinnai hot water systems, Vulcan hot water systems and Aquamax hot water systems before deciding.

The best hot water system is the one that fits your household demand, energy source, space, installation requirements and long-term expectations.

To compare Dux and other options, start with Dux hot water systems or browse all hot water systems.

Long-tail FAQs

Are Dux hot water systems good?

Dux hot water systems can be suitable for many homes when correctly sized and professionally installed. They are commonly compared for electric storage replacement and selected heat pump applications.

What should I check before buying a Dux hot water system?

Check tank size, energy source, installation location, access, dimensions, connection positions, household demand, warranty terms, installer requirements and whether you need supply only or supplied-and-installed where available.

Is Dux better than Rheem?

Dux and Rheem both offer hot water options. The better choice depends on the system type, size, installation requirements, warranty, price and household demand. Compare the specific models rather than choosing by brand alone.

Is Dux better than Rinnai?

Dux and Rinnai suit different hot water needs. Dux is often compared for electric storage, while Rinnai is also commonly compared for gas continuous flow and heat pump options. The right choice depends on the home.

What size Dux hot water system do I need?

The right size depends on the number of people, bathrooms, shower habits, bath use, laundry use and whether the old system was keeping up. A larger household may need a larger tank or a different system type.

Can I install a Dux hot water system myself?

Hot water system installation should be completed by the right licensed professional. Plumbing, electrical and gas work can create safety, compliance, warranty and insurance issues if done incorrectly.

Are Dux heat pump systems worth considering?

Dux heat pump systems may be worth considering where the property has suitable outdoor space, airflow, drainage, electrical setup and noise placement. They are not automatically suitable for every home.

Does Dux make gas hot water systems?

Depending on the available range, Dux may be compared across gas storage or selected gas options. Always check natural gas vs LPG, gas pipe sizing, water pressure and installer suitability before ordering.

Is Dux suitable for rental properties?

Dux can suit rental properties when the system is correctly sized, simple to operate and professionally installed. Landlords should consider likely tenant demand and long-term reliability, not just upfront product price.

Should I compare Dux with other brands?

Yes. It is worth comparing Dux with Rheem, Rinnai, Vulcan and Aquamax before ordering. Compare size, warranty, system type, energy source, dimensions, installation requirements and total replacement cost.

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