Best Heat Pump Hot Water System Brands in Australia: Complete Buyer’s Guide

Jun 25, 2026

Choosing the best heat pump hot water system brand depends on your household size, tank capacity, outdoor location, airflow, condensate drainage, noise placement, electrical setup, budget and whether the selected model suits your property. The best heat pump brand is not simply the cheapest option or the brand with the strongest rebate claim. It is the brand with a model that suits your home’s hot water demand and site conditions.

At Hot Water Outlet, you can compare heat pump hot water systems, electric hot water systems, hot water systems and heat pump brands including iStore, Stiebel Eltron, Envirosun, Emerald Energy, Rheem and Dux.

Quick Answer: What Is the Best Heat Pump Hot Water Brand?

There is no single best heat pump hot water brand for every home. iStore, Stiebel Eltron, Envirosun, Emerald Energy, Rheem and Dux are all commonly compared by Australian buyers looking for efficient electric hot water. The right brand depends on the model’s tank capacity, outdoor location requirements, electrical requirements, noise placement, drainage needs, warranty details and suitability for the household.

As a general guide:

Choose iStore hot water systems if you are comparing popular heat pump options for replacing electric storage.
Choose Stiebel Eltron hot water systems if you are comparing electric, heat pump or premium electric hot water options.
Choose Envirosun hot water systems if you are comparing heat pump hot water for efficient electric replacement.
Choose Emerald Energy hot water systems if you are comparing heat pump value, tank capacity and suitability.
Choose Rheem hot water systems if you want to compare heat pump hot water alongside broader electric, gas and storage options.
Choose Dux hot water systems if you want to compare heat pump options against practical electric and storage-style replacements.

The best heat pump brand is the one with a model that suits your home, not the one with the biggest claimed saving or lowest advertised price.

Heat Pump Hot Water Brands Compared

Brand	Commonly Compared For	May Suit	Key Checks
iStore	Heat pump hot water	Homes replacing electric storage where site conditions suit	Tank capacity, airflow, drainage, electrical requirements
Stiebel Eltron	Heat pump and electric hot water	Buyers comparing electric technology options	Electrical setup, outdoor location, noise, tank size
Envirosun	Heat pump hot water	Homes wanting efficient electric replacement	Outdoor airflow, condensate drainage, tank capacity
Emerald Energy	Heat pump hot water	Buyers comparing value and heat pump suitability	Tank size, location, airflow, noise placement
Rheem	Heat pump plus broader hot water options	Buyers comparing heat pump against electric, gas or storage	System type, tank size, dimensions, power requirements
Dux	Heat pump and storage-style comparisons	Buyers comparing practical electric replacement options	Tank capacity, location, electrical requirements

Heat pump hot water systems are storage systems, so tank capacity still matters. They also need suitable outdoor conditions, which makes site suitability just as important as brand choice.

What Is a Heat Pump Hot Water System?

A heat pump hot water system uses electricity to move heat from the surrounding air into stored water. It is different from a standard electric storage system because it uses heat pump technology rather than relying only on a traditional electric element for normal operation.

A heat pump hot water system may suit:

Homes replacing older electric storage
Homes wanting efficient electric hot water
Properties without natural gas
Homes with suitable outdoor space
Households with suitable electrical setup
Solar homes where the setup, timer and usage pattern suit
Families where the selected tank capacity matches demand

A heat pump may not suit:

Enclosed spaces with poor airflow
Locations too close to bedrooms or neighbours
Sites where condensate drainage is difficult
Homes with limited outdoor access
Properties where electrical requirements cannot be met
Households where a standard electric or gas system is more practical

Heat Pump vs Electric Storage

Heat pump and electric storage systems are both electric, but they suit different homes.

A heat pump hot water system may suit if:

Outdoor space is available
Airflow around the unit is suitable
Condensate drainage can be managed
Noise placement is acceptable
Electrical requirements can be confirmed
Efficient electric hot water is preferred
Tank capacity suits household demand

A standard electric hot water system may suit if:

A simple like-for-like replacement is preferred
The current electric tank location works
Outdoor airflow is limited
Noise placement is difficult
Condensate drainage is not practical
Upfront product cost is a key factor
A straightforward tank-style replacement is preferred

Heat pump hot water can be a strong choice for the right property, but it is not automatically the best replacement for every electric tank.

iStore Heat Pump Hot Water Systems

iStore is commonly compared by homeowners replacing electric storage with heat pump hot water.

iStore hot water systems may suit buyers who want:

Heat pump hot water
Efficient electric hot water
A replacement for older electric storage
A heat pump brand commonly compared in Australia
A system for homes with suitable outdoor space and airflow

Before choosing iStore, check:

Tank capacity
Household size
Number of bathrooms
Outdoor location
Airflow around the unit
Condensate drainage
Noise placement
Electrical requirements
Product dimensions
Delivery access
Required valves and fittings

iStore may be a strong option where the property suits heat pump hot water, but it should not be chosen only by rebate assumptions or upfront product price.

Stiebel Eltron Heat Pump Hot Water Systems

Stiebel Eltron is commonly compared by buyers looking at electric and heat pump hot water options.

Stiebel Eltron hot water systems may suit buyers who want:

Heat pump hot water
Electric hot water options
A comparison against iStore, Envirosun and Emerald Energy
A system where electrical requirements can be confirmed
A product suited to the available location and household demand

Before choosing Stiebel Eltron, check:

System type
Tank capacity
Electrical requirements
Outdoor airflow
Noise placement
Condensate drainage
Product dimensions
Delivery access
Required valves and fittings

Stiebel Eltron may be worth comparing if you are focused on electric hot water technology, but electrical and location requirements should be checked carefully.

Envirosun Heat Pump Hot Water Systems

Envirosun is commonly compared for heat pump hot water and efficient electric replacements.

Envirosun hot water systems may suit buyers who want:

Heat pump hot water
Efficient electric replacement
A comparison against iStore, Stiebel Eltron and Emerald Energy
A system for homes with suitable outdoor conditions
A storage-style heat pump system sized by litres

Before choosing Envirosun, check:

Tank capacity
Outdoor space
Airflow
Drainage
Noise placement
Electrical requirements
Product dimensions
Delivery access
Required valves and fittings

Envirosun may suit homes where the selected model matches the household and the proposed location suits heat pump operation.

Emerald Energy Heat Pump Hot Water Systems

Emerald Energy is commonly compared by buyers looking at heat pump hot water value and efficient electric hot water options.

Emerald Energy hot water systems may suit buyers who want:

Heat pump hot water
Efficient electric hot water
A replacement for older electric storage
A heat pump comparison option
A system where tank capacity and site suitability line up

Before choosing Emerald Energy, check:

Tank capacity
Outdoor location
Airflow
Condensate drainage
Noise placement
Electrical setup
Product dimensions
Delivery access
Required valves and fittings

Emerald Energy should be compared by model suitability, not only by advertised price or incentive assumptions.

Rheem Heat Pump Hot Water Systems

Rheem is commonly compared across multiple hot water categories, including heat pump, electric, gas and storage-style systems.

Rheem hot water systems may suit buyers who want:

A broad hot water brand
Heat pump hot water options
Electric storage alternatives
Gas and instant gas comparisons
A familiar brand across several system types

Before choosing Rheem heat pump hot water, check:

Whether heat pump is the right system type
Tank capacity
Outdoor location
Airflow
Noise placement
Condensate drainage
Electrical requirements
Product dimensions
Required valves and fittings

Rheem may be a useful comparison brand if you are still deciding between heat pump, electric storage, gas or instant gas.

Dux Heat Pump Hot Water Systems

Dux is commonly compared for electric storage, gas storage and heat pump hot water options.

Dux hot water systems may suit buyers who want:

Heat pump hot water
Electric replacement options
A comparison against Rheem and other storage-style brands
A practical hot water brand for Australian homes
A system where tank capacity and location suitability are confirmed

Before choosing Dux heat pump hot water, check:

Tank capacity
Current system size
Whether the current system keeps up
Outdoor location
Airflow
Drainage
Noise placement
Electrical requirements
Product dimensions
Required valves and fittings

Dux may be worth comparing if you are reviewing heat pump hot water alongside standard electric storage options.

Best Heat Pump Brand for Replacing Electric Storage

Heat pump hot water is often considered when replacing an older electric storage tank.

Brands to compare may include:

Before replacing electric storage with a heat pump, check:

Current tank capacity
Whether the current system runs out
Number of people in the home
Number of bathrooms
Existing system location
Proposed new location
Outdoor airflow
Condensate drainage
Noise placement
Electrical requirements
Product dimensions
Delivery access

Do not assume the same tank size will suit if the current system regularly runs out. The replacement should match current and future household demand.

Best Heat Pump Brand for One Bathroom

A one-bathroom home may suit several heat pump brands depending on household demand and available location.

Possible brands include:

iStore
Stiebel Eltron
Envirosun
Emerald Energy
Rheem
Dux

For one bathroom, check:

Number of occupants
Shower habits
Bath use
Kitchen hot water use
Laundry use
Current tank capacity
Whether the current system keeps up
Outdoor airflow
Noise placement
Drainage
Electrical setup

A one-bathroom home with one or two people may have lower demand. A one-bathroom family home may still need more tank capacity than expected.

Best Heat Pump Brand for Two Bathrooms

Two-bathroom homes need more careful heat pump sizing because hot water demand can overlap.

A heat pump may suit a two-bathroom home if:

The selected tank capacity matches demand
Outdoor airflow is suitable
Condensate drainage can be managed
Noise placement is acceptable
Electrical requirements can be met
Product dimensions fit the available location
Delivery access is practical

For two bathrooms, compare tank capacity carefully. Do not choose only by brand or product price.

Best Heat Pump Brand for Families

Families usually have higher hot water demand, especially during school mornings, evening showers and back-to-back use.

Heat pump brands to compare may include:

iStore
Stiebel Eltron
Envirosun
Emerald Energy
Rheem
Dux

For families, check:

Number of people in the home
Number of bathrooms
Shower duration
Back-to-back showers
Bath use
Kitchen and laundry use
Current tank capacity
Whether the old system runs out
Desired tank capacity
Outdoor location
Electrical requirements

A heat pump that is too small can still run out of hot water, even if the brand and technology are suitable.

Best Heat Pump Brand for Small Homes

Small homes may suit heat pump hot water if outdoor conditions are suitable.

A heat pump may suit a small home if:

Hot water demand is low to moderate
The selected tank capacity suits the home
Outdoor location is practical
Airflow is not restricted
Noise placement works
Condensate drainage can be managed
Delivery access is suitable
Electrical requirements can be met

Small homes still need proper checks. Compact properties may not always have the best location for a heat pump.

Best Heat Pump Brand for Units

Units can be more complicated because of space, airflow, noise, drainage and building rules.

A heat pump may suit a unit if:

A suitable outdoor location is available
Body corporate rules allow the system
Airflow is not restricted
Noise will not affect neighbours
Condensate drainage can be managed
Product dimensions suit the space
Electrical requirements can be met
Delivery access is practical

A heat pump may not suit some units if the only available location is enclosed, too close to bedrooms or too close to neighbouring properties.

For units, check building and body corporate requirements before ordering supply-only.

Best Heat Pump Brand for Townhouses

Townhouses can suit heat pump hot water, but location is important.

Before choosing a heat pump brand for a townhouse, check:

Side access
Courtyard space
Distance from bedrooms
Distance from neighbouring bedrooms
Boundary fence position
Outdoor airflow
Condensate drainage options
Product dimensions
Body corporate or complex rules
Electrical requirements

A townhouse with good side access and airflow may suit heat pump hot water. A narrow enclosed side passage may not.

Best Heat Pump Brand for Rental Properties

Rental properties need hot water systems that suit likely tenant demand and reduce the risk of hot water complaints.

A heat pump may suit a rental if:

The property has suitable outdoor space
Noise is unlikely to create issues
Tank capacity suits the number of bedrooms and bathrooms
Electrical requirements can be met
Drainage is practical
Access for maintenance is reasonable
Licensed tradespeople confirm suitability

Landlords should avoid choosing the smallest tank purely to reduce product price. Tenant demand may be higher than expected.

Best Heat Pump Brand for Renovations

Renovations are a good time to plan heat pump hot water properly because the final layout may be different from the current home.

Consider heat pump hot water during a renovation if:

You are replacing old electric storage
Outdoor space can be planned early
Drainage can be allowed for
Noise placement can be considered before landscaping
A second bathroom is being added
Electrical requirements can be checked
Solar or tariff setup is being reviewed
The finished home will have higher hot water demand

Plan the heat pump around the finished household, not the old hot water system.

Best Heat Pump Brand for Solar Homes

Some buyers compare heat pump hot water because they have rooftop solar or want to use more electricity during the day.

A heat pump may suit a solar home if:

The product and setup suit household demand
Electrical requirements can be confirmed
Timer or tariff considerations are checked
The unit can be located outdoors with suitable airflow
Tank capacity suits the household
Licensed tradespeople confirm the setup

Do not assume solar automatically makes any heat pump the best choice. The system still needs to suit usage pattern, location, electrical setup and product specifications.

Tank Capacity: How to Compare Heat Pump Brands

Heat pump systems are storage systems, so tank capacity matters.

Before comparing brands, check:

Number of people in the home
Number of bathrooms
Shower duration
Back-to-back showers
Bath use
Kitchen hot water use
Laundry use
Current tank capacity
Whether the current system keeps up
Future household changes

A larger household usually needs more careful sizing. Choosing the smallest heat pump to reduce upfront product price can lead to poor performance during peak use.

Outdoor Location and Airflow

Heat pump hot water systems need suitable outdoor airflow.

Before ordering, check:

Whether the unit will be outdoors
Clearance around the system
Air movement around the location
Whether the area is enclosed
Distance from walls and fences
Distance from bedrooms
Distance from neighbours
Access for licensed tradespeople
Product dimensions
Manufacturer location requirements

Do not assume the existing electric storage location will automatically suit a heat pump.

Noise Placement

Heat pump hot water systems make operating noise, so placement should be checked carefully.

Consider whether the proposed location is near:

Bedroom windows
Neighbouring bedrooms
Courtyards
Outdoor living areas
Narrow side passages
Boundary fences
Unit balconies
Shared walls

The best heat pump location balances airflow, drainage, access and noise.

Condensate Drainage

Heat pump hot water systems can produce condensate during operation.

Before choosing a heat pump brand or model, check:

Where condensate will drain
Whether water may pool around the unit
Whether drainage work may be required
Whether the site has suitable fall
Whether drainage could create a slip risk
Whether the installer has confirmed requirements

Condensate drainage should be considered before ordering supply-only.

Electrical Requirements

Heat pump hot water systems use electricity and must be connected safely by appropriately licensed tradespeople.

Before ordering, check:

Existing electrical supply
Circuit requirements
Switchboard suitability
Timer or tariff setup where relevant
Product electrical specifications
Whether electrical upgrades may be needed
Access for electricians
Compliance requirements

Hot Water Outlet sells supply-only products online. Electrical work is not included unless clearly stated and must be completed by appropriately licensed tradespeople.

Rebates and Incentives

Heat pump hot water rebates, STCs or incentives may be available in some areas, but they can change and may depend on product eligibility, installer eligibility, property details, purchase type and program rules.

Before choosing a heat pump based on rebates, check:

Current rebate rules
Product eligibility
Installer requirements
Property eligibility
Customer eligibility
Whether the offer is still active
Whether the advertised price includes or excludes rebates
Whether the rebate applies to supply-only purchases

Do not choose a heat pump based only on rebate assumptions. A rebate does not make an unsuitable location suitable.

Heat Pump vs Gas Hot Water

Heat pump and gas hot water suit different properties.

A heat pump may suit if:

You want electric hot water
Outdoor airflow is suitable
Tank capacity suits household demand
Electrical requirements can be met
Natural gas or LPG is not available or not preferred

A gas hot water system or instant gas hot water system may suit if:

Natural gas or LPG is available
Gas hot water is already installed
Continuous flow hot water is preferred
Gas supply and water pressure are suitable
A licensed gas fitter confirms the setup

Natural gas and LPG are not interchangeable, so gas buyers must confirm the correct gas type before ordering.

Heat Pump vs Instant Electric

Heat pump and instant electric systems are both electric, but they are very different.

Heat pump hot water:

Stores hot water in a tank
Is sized by tank capacity in litres
Needs outdoor airflow and drainage
Needs noise placement checks
May suit whole-home use where correctly sized

Instant electric hot water:

Heats water as it passes through the unit
Needs careful electrical capacity checks
May suit selected applications
May not suit every whole-home replacement
Depends heavily on flow demand and electrical supply

Electrical requirements should be checked before ordering either option.

Supply-Only Pricing vs Installed Cost

When comparing heat pump hot water brands online, make sure you understand what the price includes.

Hot Water Outlet sells supply-only hot water systems and accessories online. Supply-only pricing usually does not include:

Installation
Plumbing labour
Electrical work
Old unit removal
Disposal
Valves
Fittings
Pipework changes
Drainage work
Switchboard upgrades
Compliance upgrades
Concrete bases or platforms
Delivery beyond what is shown at checkout

Before ordering, confirm the full job requirements with appropriately licensed tradespeople.

Valves, Fittings and Accessories

A heat pump hot water order may need more than the main unit.

Common accessories include:

Tempering valves
Pressure relief valves
Duo valves
Non-return valves
Isolation valves
Copper pipework
Fittings
Drainage parts
Connection parts

Hot Water Outlet has a dedicated range of valves, pipework and fittings to help customers compare common hot water accessories.

Always confirm compatibility before ordering.

Common Mistakes When Choosing a Heat Pump Brand

Choosing by Rebate First

Rebates and incentives can change and may not apply to every product, property, installer or purchase type. Suitability should come first.

Choosing the Smallest Tank

A smaller tank may cost less upfront but may not suit families or homes with higher peak use.

Ignoring Airflow

Heat pumps need suitable air movement. Poor airflow can make the location unsuitable.

Forgetting Noise Placement

Noise should be checked before ordering, especially for townhouses, units and homes with close neighbours.

Forgetting Condensate Drainage

Condensate needs somewhere practical to go.

Assuming Any Electric Tank Can Be Replaced With a Heat Pump

Heat pump suitability depends on location, airflow, electrical requirements, noise placement and drainage.

Comparing Supply-Only Price to Installed Cost

Supply-only pricing is not the same as full installed cost.

Forgetting Valves and Fittings

The hot water unit may not be the complete order. Accessories may also be required.

Heat Pump Brand Buyer Checklist

Before choosing a heat pump hot water brand, check:

Current hot water system brand and model
Current system type
Current tank capacity
Whether the current system keeps up
Number of people in the home
Number of bathrooms
Shower habits
Bath use
Kitchen and laundry use
Desired tank capacity
Outdoor location
Airflow
Noise placement
Condensate drainage
Electrical requirements
Product dimensions
Delivery access
Required valves and fittings
Warranty information
Rebate or incentive eligibility where relevant
Licensed trade requirements

Compare Heat Pump Hot Water Brands Online

Hot Water Outlet makes it easier to compare heat pump hot water brands by tank capacity, product dimensions, specifications and supply-only pricing.

Start with:

Then compare brands:

FAQs About Heat Pump Hot Water Brands

What is the best heat pump hot water brand?

The best heat pump hot water brand depends on the home. iStore, Stiebel Eltron, Envirosun, Emerald Energy, Rheem and Dux are commonly compared, but the right choice depends on tank capacity, outdoor location, airflow, drainage, noise placement and electrical requirements.

Is iStore better than Envirosun?

iStore and Envirosun are both commonly compared for heat pump hot water. The better choice depends on the exact model, tank capacity, dimensions, price, warranty details and whether the product suits your property.

Is Stiebel Eltron good for heat pump hot water?

Stiebel Eltron is commonly compared for electric and heat pump hot water options. It may suit homes where the selected model matches household demand, electrical requirements and outdoor conditions.

Is Emerald Energy a good heat pump brand?

Emerald Energy is commonly compared by buyers looking at heat pump hot water value and efficient electric hot water options. The right choice depends on model suitability, tank capacity, location and electrical requirements.

Is Rheem good for heat pump hot water?

Rheem is commonly compared across several hot water categories, including heat pump, electric, gas and storage-style options. It may suit buyers wanting to compare heat pump hot water against broader alternatives.

Is Dux good for heat pump hot water?

Dux may be worth comparing if you are reviewing heat pump hot water alongside electric storage and practical replacement options. Suitability depends on the selected model and property conditions.

What size heat pump hot water system do I need?

The right size depends on the number of people in the home, number of bathrooms, shower habits, bath use, kitchen and laundry use, and whether the current system keeps up. Heat pump systems are sized by tank capacity in litres.

Can I replace electric storage with a heat pump?

Yes, if the property has suitable outdoor space, airflow, condensate drainage and electrical requirements. Licensed tradespeople should confirm the setup before installation.

Are heat pump rebates available?

Rebates, STCs or incentives may be available in some areas, but rules can change and may depend on product eligibility, installer eligibility, property details and purchase type. Check current requirements before relying on a rebate.

Can I install a heat pump hot water system myself?

No. Heat pump hot water systems involve plumbing and electrical work that should be completed by appropriately licensed tradespeople. Hot Water Outlet sells supply-only hot water systems and accessories online, and may help organise quotes from reputable installers where appropriate.

Find the Best Heat Pump Hot Water Brand for Your Home

The best heat pump hot water brand depends on your household demand, tank capacity, outdoor location, airflow, noise placement, drainage, electrical requirements and budget. iStore, Stiebel Eltron, Envirosun, Emerald Energy, Rheem and Dux can all be worth comparing, but the right choice is the model that suits your home.

Browse heat pump hot water systems online with Hot Water Outlet to compare brands, tank sizes, specifications and supply-only pricing.

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