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

Choosing the best heat pump hot water system in Australia depends on your household size, available space, location, budget, current hot water setup and daily hot water demand. A heat pump can be a strong option for homes wanting an energy-efficient electric hot water system, but the right model still needs to suit your property, tank size requirements, airflow, dimensions and replacement setup.

At Hot Water Outlet, you can compare heat pump hot water systems online from trusted brands, along with the wider range of hot water systems, electric hot water systems, gas hot water systems, instant gas hot water systems and common valves, pipework and fittings.

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

The best heat pump hot water system is the one that matches your household’s hot water demand, available outdoor space, airflow, tank size needs, noise considerations and replacement requirements.

As a general guide:

• Choose a smaller heat pump if the home has lower hot water demand and limited daily usage.

• Choose a larger heat pump if the home has more people, more bathrooms or heavier daily hot water use.

• Choose a recognised brand if you want easier product comparison, warranty information and specification checks.

• Choose a model that suits the available location, not just the tank capacity.

• Compare the heat pump against your current electric storage unit before ordering.

For most buyers, the best starting point is to compare heat pump hot water systems by tank size, brand, dimensions, warranty information, household suitability and product specifications.

Why Heat Pump Hot Water Systems Are Popular

Heat pump hot water systems are popular because they give Australian households another electric hot water option beyond standard electric storage. Instead of relying only on an electric element to heat stored water, a heat pump uses heat from the surrounding air to help heat the water inside the tank.

This makes heat pumps a common option for homeowners comparing efficient electric hot water systems, especially when replacing an older electric storage tank.

A heat pump may be worth considering if:

• Your current electric hot water system is old

• You want to compare energy-efficient electric hot water options

• You have suitable outdoor space

• The location has enough airflow

• You want stored hot water

• Your household demand suits the tank capacity

• You are planning a replacement, renovation or property upgrade

A heat pump is not automatically the right answer for every home. The system still needs to suit the property, household demand, access, noise expectations, available space and product requirements.

How Does a Heat Pump Hot Water System Work?

A heat pump hot water system uses electricity to move heat from the surrounding air into the stored water. It works differently from a standard electric hot water system, even though both use electricity and both store hot water in a tank.

A standard electric storage system heats water with an electric element. A heat pump uses a refrigeration-style process to capture heat from the air and transfer it into the water.

This is why location matters. A heat pump needs enough airflow around the unit and enough space for the system to operate as intended. When comparing heat pumps, do not only look at the tank size. Check the dimensions, airflow requirements, sound rating, location suitability and product specifications.

Heat Pump vs Electric Hot Water

Heat pump and electric storage hot water systems are often compared because many heat pump buyers are replacing an existing electric hot water tank.

Choose a heat pump hot water system if you want to compare efficient electric storage options and your home has a suitable location. Choose an electric hot water system if you want a more straightforward electric storage replacement and the current setup already works well.

Best Heat Pump Hot Water System by Household Type

Best Heat Pump Hot Water System for Small Homes

Small homes, units and townhouses may not need the same tank size as a larger family home. The right heat pump depends on the number of people, number of bathrooms, outdoor space and daily hot water use.

For smaller households, compare:

• Tank size

• Unit dimensions

• Outdoor location

• Airflow

• Noise rating

• Current hot water demand

• Delivery access

• Product specifications

A smaller household should not automatically choose the smallest system. Shower habits, bath use, laundry use and kitchen use still matter.

Best Heat Pump Hot Water System for Families

Family homes usually need stronger hot water capacity than smaller households. A family may need a larger heat pump tank, depending on the number of people, bathrooms and daily routines.

For family homes, compare:

• Number of occupants

• Number of bathrooms

• Morning and evening shower demand

• Bath use

• Laundry use

• Kitchen hot water use

• Tank capacity

• Recovery performance

• Outdoor space

• Airflow

• Product dimensions

A family of four with one bathroom may need a different heat pump setup from a family of five with two bathrooms and back-to-back showers. Always match the system to the way the household actually uses hot water.

Best Heat Pump Hot Water System for Replacing Electric Storage

Heat pumps are commonly considered when replacing old electric storage hot water systems. If your current electric tank is reaching the end of its life, a heat pump may be worth comparing before choosing another standard electric unit.

Before replacing electric storage with a heat pump, check:

• Current tank size

• Current system location

• Available outdoor space

• Airflow around the proposed location

• Electrical requirements

• Unit dimensions

• Household demand

• Required valves and fittings

• Delivery access

• Product specifications

If your current electric storage system has always supplied enough hot water, its tank size can be a useful starting point. If your household regularly runs out of hot water, compare larger tanks or different system types before ordering.

Best Heat Pump Hot Water System for Renovations

Renovations are a good time to reassess the hot water system. A bathroom renovation, kitchen renovation, laundry upgrade or second bathroom may increase hot water demand.

A heat pump may be worth comparing during a renovation if:

• You are already replacing an old hot water system

• You want an efficient electric storage option

• The new layout changes hot water usage

• You are adding fixtures or bathrooms

• There is suitable space outside

• The system location can be planned properly

For renovation projects, also check whether you need valves, pipework and fittings to support the new setup.

Best Heat Pump Hot Water System for Rental Properties

For rental properties, the best heat pump is usually one that balances practical sizing, recognised brand support, product availability and suitability for the property. It needs to meet tenant demand without being unnecessarily oversized.

For rentals, compare:

• Number of bedrooms

• Number of bathrooms

• Likely tenant demand

• Existing hot water system type

• Current tank size

• Location suitability

• Warranty information

• Brand recognition

• Delivery access

• Product specifications

A like-for-like electric storage replacement may be simpler in some rentals, but a heat pump may be worth comparing where the property has the right location and the owner wants an efficient electric hot water option.

What Size Heat Pump Hot Water System Do I Need?

Heat pump hot water systems are sized by tank capacity, usually measured in litres. The right size depends on household demand, not just the number of people in the home.

When choosing a heat pump size, consider:

• Number of people

• Number of bathrooms

• Number of showers per day

• Bath use

• Laundry use

• Kitchen use

• Whether hot water is used at the same time

• Current tank size

• Whether the current system runs out

• Available space

• Recovery performance

• Product specifications

A smaller household may suit a smaller heat pump, while a larger family may need a larger tank. The best size is the one that matches daily hot water use without being unnecessarily oversized.

Common Heat Pump Tank Sizes

Heat pump hot water systems are available in different sizes to suit different households and applications. The right capacity depends on the home, but buyers commonly compare medium and larger tanks for regular household use.

Common sizing considerations include:

• Lower-capacity systems for smaller households

• Medium-capacity systems for everyday family use

• Larger-capacity systems for higher-demand homes

• Replacement sizing based on the old electric storage tank

• Product dimensions and location suitability

If you are unsure what size to choose, compare heat pump options with your current hot water system. If the old tank worked well, a similar capacity may be a practical starting point. If the old system often ran out, it may be worth comparing a larger capacity.

Heat Pump Hot Water Brands to Compare

Hot Water Outlet lists a range of recognised heat pump and hot water brands. Brand can help narrow your search, but it should not be the only deciding factor. The selected system still needs to suit your household demand, location and product requirements.

iStore Heat Pump Hot Water Systems

iStore hot water systems are commonly compared by buyers looking at heat pump hot water options. iStore may be worth considering if you are focused on heat pump technology and efficient electric hot water.

Rheem Heat Pump Hot Water Systems

Rheem hot water systems are widely recognised in the Australian hot water market, with options across multiple hot water categories. Rheem may be worth comparing if you want a familiar brand with a broad hot water range.

Rinnai Heat Pump Hot Water Systems

Rinnai hot water systems are commonly considered across electric, gas, instant gas and heat pump categories. Rinnai may be worth comparing if you are reviewing multiple hot water system types.

Stiebel Eltron Heat Pump Hot Water Systems

Stiebel Eltron hot water systems are often compared by customers looking at heat pump and electric hot water options.

Envirosun Heat Pump Hot Water Systems

Envirosun hot water systems may be worth comparing if you are reviewing heat pump and efficient hot water options.

Emerald Energy Heat Pump Hot Water Systems

Emerald Energy hot water systems may suit buyers comparing heat pump hot water systems and energy-efficient electric hot water options.

What to Check Before Buying a Heat Pump Hot Water System

1. Tank Capacity

Tank capacity needs to match household demand. A tank that is too small may run out too quickly, while a tank that is too large may cost more than needed.

2. Available Space

Heat pumps can require more planning than standard electric storage tanks. Check the product dimensions and make sure there is enough room for the unit.

3. Airflow

Heat pumps need suitable airflow around the system. A cramped or poorly ventilated location may not be appropriate.

4. Noise Rating

Heat pumps make operating noise, so location matters. Check the product sound rating and consider nearby bedrooms, windows, fences and neighbouring properties.

5. Existing System Type

If replacing electric storage, compare the current tank size, power supply, location and connection positions against the new heat pump.

6. Household Demand

A home with long showers, multiple bathrooms or back-to-back use may need a larger tank than a lower-demand household.

7. Product Dimensions

Do not assume the new heat pump will fit where the old tank was. Always check height, width, depth and access.

8. Connection Positions

Connection positions can vary between models. Check hot and cold water connections, electrical requirements and any required valves or fittings.

9. Warranty Information

Compare the warranty information listed on the product page. Warranty terms can vary between brands and models.

10. Required Accessories

Some heat pump replacements may require valves, fittings or pipework. Check the full order and browse valves, pipework and fittings where needed.

Heat Pump Hot Water Pros and Cons

Potential Advantages of Heat Pump Hot Water

Heat pump systems may offer several benefits when matched to the right home.

Potential advantages include:

• Efficient electric hot water option

• Good alternative to standard electric storage in suitable homes

• Stored hot water for regular household use

• Suitable for many electric hot water replacement projects

• Available in family-friendly tank sizes

• Range of brands and models to compare

Potential Disadvantages of Heat Pump Hot Water

Heat pumps are not suitable for every property.

Potential disadvantages include:

• Need suitable outdoor space

• Need adequate airflow

• Make operating noise

• Can be larger or more complex than standard electric storage

• May not suit every location

• Product choice needs careful specification checking

• Licensed tradespeople are required for connection work

The best way to compare heat pumps is to look at the whole setup, not just the unit price.

Heat Pump vs Instant Gas Hot Water

Heat pump and instant gas hot water systems are very different. A heat pump stores hot water in a tank and uses electricity. An instant gas system heats water as it flows through the unit and uses natural gas or LPG.

Choose heat pump if you want an electric storage option and the home has a suitable location. Choose instant gas if the home has natural gas or LPG and you want continuous flow gas hot water.

Heat Pump vs Gas Storage Hot Water

Heat pump and gas hot water systems can both store hot water, but they use different energy sources.

A heat pump uses electricity and surrounding air to help heat water. A gas storage system uses natural gas or LPG to heat water inside a tank.

The best option depends on your current energy source, replacement setup and household demand.

Replacing Electric Hot Water With a Heat Pump

Replacing an old electric storage system with a heat pump is one of the most common reasons buyers compare heat pump hot water systems.

Before making the switch, check:

• Current tank capacity

• Current system age

• Whether the old system ran out of hot water

• Current power supply

• Existing system location

• Outdoor space

• Airflow

• Noise considerations

• Product dimensions

• Required valves and fittings

• Delivery access

• Product specifications

If the existing electric storage system is inside a cupboard or tight internal space, the replacement location may need to be reviewed carefully because many heat pumps are designed for suitable outdoor locations.

Can I Replace Any Electric Hot Water System With a Heat Pump?

Not always. A heat pump may be a strong option for many electric hot water replacements, but suitability depends on the property.

A heat pump may not suit if:

• There is no suitable outdoor location

• Airflow is restricted

• Noise could be an issue

• Access is difficult

• The space is too small

• The electrical setup is not suitable

• The household demand does not match the available models

• The product dimensions do not fit

If you are unsure, confirm the requirements with a licensed plumber or electrician before ordering.

Common Mistakes When Buying a Heat Pump Hot Water System

Choosing by Price Alone

The cheapest heat pump may not be the best option if it does not suit your household size, available space, airflow or replacement setup.

Ignoring Tank Size

A heat pump still stores hot water. Tank capacity matters, especially for families and higher-demand homes.

Forgetting About Airflow

Heat pumps need suitable airflow. A tight space with poor ventilation may not be suitable.

Not Checking Noise Rating

Heat pumps make operational noise. Check the product information and consider where the unit will be located.

Assuming It Will Fit Where the Old Tank Was

A heat pump may have different dimensions and location requirements compared with an old electric storage tank.

Forgetting Valves and Fittings

Some replacement projects may require valves, pipework or fittings. Check the full hot water order, not just the main heat pump.

Not Checking Product Specifications

Always compare the product details before ordering. Tank capacity, dimensions, warranty information, electrical requirements and location suitability all matter.

Heat Pump Hot Water Buyer Checklist

Before ordering a heat pump hot water system online, check:

• Household size

• Number of bathrooms

• Daily hot water use

• Current hot water system type

• Current tank capacity

• Whether the current system runs out

• Desired tank size

• Unit dimensions

• Outdoor location

• Airflow

• Noise rating

• Electrical requirements

• Water connection positions

• Pressure rating

• Required valves and fittings

• Delivery access

• Brand and model

• Warranty information

• Product specifications

Are Heat Pump Hot Water Systems Worth It?

Heat pump hot water systems can be worth comparing if you want an efficient electric hot water option and your property has a suitable location. They are especially relevant for homes replacing older electric storage systems.

However, a heat pump is not the right choice for every property. The decision should be based on household demand, space, airflow, noise rating, product dimensions and replacement requirements.

If you want a straightforward electric storage replacement, compare electric hot water systems. If you want to compare efficient electric storage options, browse heat pump hot water systems.

Compare Heat Pump Hot Water Systems Online

Hot Water Outlet makes it easier to compare heat pump hot water systems online by brand, size, household suitability and product specifications. You can also compare heat pumps against other hot water systems, including electric, gas and instant gas options.

Start with:

• Heat Pump Hot Water Systems

• Electric Hot Water Systems

• Hot Water Systems

• Valves, Pipework and Fittings

FAQs About Heat Pump Hot Water Systems

What is the best heat pump hot water system in Australia?

The best heat pump hot water system is the one that suits your household size, daily hot water demand, available space, airflow, noise requirements and replacement setup. Compare tank capacity, dimensions, warranty information, brand and product specifications before ordering.

What size heat pump hot water system do I need?

The right heat pump size depends on how many people live in the home, how many bathrooms there are, how often hot water is used and whether the current system runs out. Larger households usually need larger tank capacity, while smaller households may suit smaller systems.

Is a heat pump better than electric hot water?

A heat pump can be a more efficient electric hot water option in suitable homes, but standard electric storage may still be practical for some like-for-like replacements. The better choice depends on your location, space, budget, household demand and replacement requirements.

Can I replace my electric hot water system with a heat pump?

Many homeowners compare heat pumps when replacing old electric storage systems. Suitability depends on outdoor space, airflow, dimensions, electrical requirements, household demand and product specifications.

Do heat pump hot water systems need outdoor space?

Most heat pump hot water systems need a suitable location with enough airflow. Always check the product specifications, clearance requirements and location suitability before ordering.

Are heat pump hot water systems noisy?

Heat pumps make operating noise, so location is important. Check the product noise rating and consider nearby windows, bedrooms, fences and neighbouring properties before choosing a location.

What brands of heat pump hot water systems should I compare?

Common brands to compare include iStore, Rheem, Rinnai, Stiebel Eltron, Envirosun and Emerald Energy. Choose by suitability, not brand alone.

Do I need valves and fittings with a heat pump hot water system?

Some heat pump replacements may require valves, fittings or pipework depending on the existing setup and product requirements. Browse valves, pipework and fittings and confirm compatibility before ordering.

Is a heat pump good for a family home?

A heat pump can suit a family home if the tank capacity, location, airflow and recovery performance match the household’s hot water demand. Larger families should pay close attention to tank size and daily usage patterns.

Should I buy a heat pump or instant gas hot water system?

Choose a heat pump if you want an electric storage option and the property has suitable outdoor space and airflow. Choose instant gas if the home has natural gas or LPG and you want continuous flow hot water. The better option depends on the property’s energy source and hot water demand.

Find the Best Heat Pump Hot Water System for Your Home

The best heat pump hot water system is the one that suits your household demand, outdoor space, airflow, tank size needs and replacement setup. Before ordering, compare the brand, model, capacity, dimensions, noise rating, warranty information and product specifications.

Browse heat pump hot water systems online with Hot Water Outlet to compare options from recognised brands, or explore the full hot water systems range if you are still deciding between electric, gas, instant gas and heat pump hot water.