Hot Water Systems Perth: Supply-Only Buyer’s Guide for Replacing Your System

If you need a hot water system in Perth, the right choice depends on your current setup, household size, energy source, available space and whether you already have a licensed local installer arranged.

Perth homes commonly use electric storage, gas storage, continuous flow gas, solar and heat pump hot water systems. If your current unit has failed, is leaking, runs out too quickly or is no longer efficient enough for your household, replacing it with the right size and system type can make a big difference to comfort and long-term value.

Installed Today supplies a wide range of hot water systems online, including electric hot water systems, instant gas hot water systems, heat pump hot water systems and complete hot water systems for customers comparing replacement options. For Perth customers, supply-only ordering is best suited to homeowners, landlords or property managers who already have their own licensed Perth plumber, gas fitter or electrician arranged.

Quick answer: what hot water system is best for Perth homes?

For many Perth homes, the best hot water system is the one that matches the existing system type and is correctly sized for the household.

As a simple guide:

The easiest replacement is often like-for-like. If your Perth home already has electric storage hot water and it has worked well, compare electric storage first. If your home already has gas continuous flow, compare a correctly matched natural gas or LPG continuous flow unit. If you want a more efficient electric option and the location suits, compare heat pump hot water.

Supply-only hot water systems for Perth

For Perth customers, supply-only hot water ordering means you buy the product online and arrange your own licensed local installer.

This can suit:

• Homeowners who already have a plumber arranged

• Landlords working with a property manager

• Builders and renovators

• Customers replacing like-for-like systems

• Customers comparing brands and prices online

• Perth buyers who know the system type and size they need

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

Before ordering supply only, confirm the selected model with your licensed installer. This is especially important for gas type, electrical requirements, dimensions, access, valves and replacement location.

Does Installed Today install hot water systems in Perth?

Installed Today’s supplied-and-installed options are available only on selected products in eligible Brisbane and Gold Coast service areas where shown.

For Perth customers, the safer approach is to treat Installed Today as a supply-only hot water product source. You can order a suitable hot water system and have your own licensed Perth tradesperson install it.

Perth hot water installation, gas fitting and electrical work should be completed by appropriately licensed local professionals. Gas systems must be installed by a licensed gas fitter. Electrical work must be completed by a licensed electrician where required.

Best hot water system options for Perth

The main hot water options for Perth homes are:

• Electric storage hot water

• Gas storage hot water

• Continuous flow gas hot water

• Heat pump hot water

• Solar hot water

• Selected electric instantaneous systems in site-specific situations

Each option has advantages and limitations. The right system depends on the property, not just the brand or price.

Electric hot water systems in Perth

Electric storage hot water systems are a common and practical replacement option for many Perth homes, units and rental properties.

They store heated water in a cylinder, ready for use throughout the day. They are available in a wide range of sizes, making them suitable for small apartments through to larger family homes.

Common electric storage sizes include:

• 50L for very small or point-of-use applications

• 80L for low-use units or studios

• 125L for small homes and 1–2 people

• 160L for couples, small families and 1 bathroom homes

• 250L for family homes and 2 bathroom properties

• 315L for larger families and higher demand

• 400L for high-use homes

You can compare available options in the electric hot water systems collection.

When electric storage is the best choice

Electric storage may be the best choice when:

• Your current system is electric storage

• You want a straightforward like-for-like replacement

• The existing location already suits a storage tank

• Your home does not have gas

• You want a practical supply-only product

• You have a licensed installer who has confirmed the size and requirements

Electric storage is often the simplest option when the property already has the right power supply, water connections, base, drainage and access.

The main downside is that storage systems can run out of hot water if undersized. If your old system regularly ran out, do not automatically replace it with the same capacity.

Gas hot water systems in Perth

Gas hot water can be a good option for Perth homes with natural gas or LPG.

The two main types are:

• Gas storage hot water

• Continuous flow gas hot water

Gas storage systems store hot water in a tank. Continuous flow gas systems heat water as it passes through the unit, without storing a full cylinder of hot water.

For many modern replacements, instant gas hot water systems are commonly compared because they are compact, wall-mounted and heat water on demand.

Natural gas vs LPG in Perth

Before ordering any gas hot water system, confirm whether the property uses natural gas or LPG.

Natural gas and LPG models are not interchangeable. Ordering the wrong gas type can delay installation and create compliance problems.

Check:

• The label on the existing unit

• The fuel type shown on the current system

• Whether the home has a natural gas meter

• Whether the property uses LPG bottles

• Whether the selected replacement model matches the gas type

• Whether your licensed gas fitter has confirmed suitability

This is especially important for rental properties, semi-rural homes, granny flats and homes where services have been changed over time.

Continuous flow gas hot water in Perth

Continuous flow gas hot water systems are a popular option for homes that already have suitable gas supply.

Common sizes include:

• 16 L/min for small homes and 1 bathroom properties

• 20 L/min for moderate demand

• 26 L/min for larger homes and 2 bathroom properties

A 16 L/min unit may suit a smaller home where one shower is usually used at a time. A 26 L/min unit is commonly compared for family homes, but the property still needs suitable gas supply, pipe sizing, water pressure and installation location.

Continuous flow gas may suit Perth homes where:

• The existing system is already instant gas

• The home has natural gas or LPG

• Space for a storage tank is limited

• The unit can be installed externally

• The household wants hot water on demand

• A licensed gas fitter has confirmed suitability

Heat pump hot water systems in Perth

A heat pump hot water system can be a strong option for Perth homeowners wanting a more efficient electric hot water upgrade.

Heat pumps use electricity to draw heat from the surrounding air and transfer it into the water. They still store hot water in a tank, but they can use less electricity than standard electric storage systems in suitable conditions.

A heat pump hot water system may suit Perth homes with:

• Suitable outdoor space

• Good airflow around the unit

• Condensate drainage

• Electrical suitability

• Enough access for delivery and service

• Acceptable noise placement

• Long-term ownership plans

• Solar power that may support daytime operation, where set up correctly

Heat pumps are not always the cheapest upfront replacement. They are best compared as a longer-term efficiency upgrade, not just a quick like-for-like swap.

When heat pump may not suit a Perth property

A heat pump may not suit every site.

It may be unsuitable if:

• The system location is enclosed

• There is poor airflow

• The unit would sit too close to bedrooms

• Condensate drainage is difficult

• Access is too tight

• The household needs the lowest upfront product cost

• The property is an apartment with body corporate restrictions

• The selected model is not sized for the household

Before ordering supply only, ask your licensed installer to confirm the location, clearances, drainage and electrical requirements.

Solar hot water in Perth

Perth’s climate can make solar hot water attractive for some homes, but it is not the best fit for every replacement.

Solar hot water systems can involve roof-mounted collectors, storage tanks, boosters, roof access and site-specific requirements. Replacing or upgrading a solar system is usually more complex than a standard electric or gas replacement.

Before choosing solar hot water, consider:

• Roof orientation

• Roof condition

• Shading

• Tank location

• Booster type

• Household demand

• Access

• Existing solar setup

• Maintenance requirements

• Replacement cost compared with heat pump or electric storage

If your old solar system has failed, compare whether another solar system, heat pump, electric storage or gas option is more practical for the property.

Choosing the right size hot water system

Sizing matters more than brand alone. A quality system that is too small will still frustrate the household.

As a general guide:

For continuous flow gas, sizing is based on litres per minute instead of tank capacity. A small home may compare 16 L/min, while a family home may compare 20 L/min or 26 L/min.

The correct size depends on:

• Number of people

• Number of bathrooms

• Number of showers

• Whether two showers run at once

• Bath use

• Laundry use

• Existing system performance

• Shower habits

• Rental or Airbnb use

• Available energy source

Hot water systems for Perth apartments and units

Perth apartments and units often have tighter space and access requirements.

Common options include:

• 50L to 80L electric storage for very small spaces

• 125L electric storage for 1 bedroom units

• 160L electric storage for 2 bedroom units or higher use

• Like-for-like gas replacement where the building already supports gas

• Heat pump only where outdoor space, airflow and body corporate approval suit

Before ordering, check cupboard dimensions, drainage, access, body corporate rules, lift access and whether the replacement will fit through doorways and service spaces.

For many apartments, like-for-like electric storage is the simplest supply-only replacement.

Hot water systems for Perth family homes

Family homes usually need more capacity than small units.

Common options include:

• 250L electric storage for smaller families

• 315L electric storage for larger families

• 400L electric storage for high-use households

• 26 L/min continuous flow gas where gas supply suits

• Heat pump hot water where outdoor space and electrical setup suit

If your current system regularly runs out, do not replace it with the same size without reviewing household demand.

Children becoming teenagers, more people living in the home, longer showers, extra bathrooms and rental use can all increase hot water demand.

Hot water systems for Perth rental properties

Rental properties should be sized for likely tenant demand, not only the current tenants.

A one-bedroom unit may suit 125L electric storage, while a two-bathroom family rental may need 250L or 315L. Larger homes may need 315L to 400L or a suitable gas continuous flow system.

For landlords and property managers, the key considerations are:

• Reliability

• Correct sizing

• Simple operation for tenants

• Existing services

• Installation access

• Replacement cost

• Future tenant flexibility

• Compliance

• Clear supply-only ordering details

Choosing the smallest possible system may save upfront cost but can lead to tenant complaints if hot water runs out too often.

Hot water systems for Perth Airbnb and short-stay properties

Short-stay properties should be sized for maximum guest occupancy, not average use.

An Airbnb that sleeps six people may need a larger system than an owner-occupied home with two people, even if both properties have the same number of bathrooms.

Short-stay properties often need to handle:

• Back-to-back showers

• Guests using two bathrooms

• Bath use

• Laundry between bookings

• Cleaning routines

• Higher comfort expectations

• Guests who are unfamiliar with the system

Common options include:

• 160L electric storage for compact stays

• 250L electric storage for family stays

• 315L to 400L electric storage for larger homes

• 20 L/min to 26 L/min instant gas where suitable

• Heat pump hot water where the location and recovery time suit

Replacing like-for-like

Like-for-like replacement is often the simplest path for Perth homes.

This may mean replacing:

• Electric storage with electric storage

• Gas storage with gas storage

• Instant gas with instant gas

• Natural gas with natural gas

• LPG with LPG

• Heat pump with heat pump

• Similar capacity with similar capacity

• Same location where practical

Like-for-like replacement can reduce the chance of unexpected changes to pipework, gas supply, electrical supply, drainage or location requirements.

However, like-for-like does not always mean same size. If the old system was too small, compare a larger size before ordering.

When to upgrade instead of replacing the same system

You may want to upgrade or change system type if:

• The current system runs out of hot water

• The tank is leaking

• The system is very old

• Repair costs are no longer worthwhile

• More people now live in the home

• A second bathroom has been added

• The home has become a rental

• You want better energy efficiency

• You have suitable space for a heat pump

• You want to move from gas storage to continuous flow gas

• Your current system no longer suits the property

Changing system type can be worthwhile, but it can involve extra work. Always confirm requirements with your licensed installer before ordering.

Signs your Perth hot water system may need replacing

A hot water system may be due for replacement if:

• The tank is leaking

• Hot water runs out much faster than it used to

• Water is rusty or discoloured from the hot side

• The system is making unusual noises

• The unit is badly corroded

• The circuit breaker keeps tripping

• Gas ignition problems keep returning

• Repairs are becoming frequent

• The system is undersized

• The unit is past its practical service life

• Parts are difficult to source

Some issues may be repairable, but leaking tanks and recurring failures often make replacement the more practical option.

What to check before ordering a hot water system online

Before ordering supply only, collect these details:

• Current system brand

• Current model number

• Current capacity or L/min rating

• Electric, gas, solar or heat pump

• Natural gas or LPG if gas

• Indoor or outdoor location

• Number of bathrooms

• Number of people in the home

• Whether the old system ran out often

• Available space and dimensions

• Access path for delivery

• Pipe and valve locations

• Electrical requirements

• Gas requirements

• Drainage requirements

• Installer confirmation

This information helps you avoid ordering a system that does not fit, does not match the property or is not suitable for the existing services.

Important installation considerations in Perth

A licensed Perth installer should check the site before installation.

Depending on the system, they may need to consider:

• Water pressure

• Pressure limiting valve requirements

• Tempering valve requirements

• Isolation valves

• PTR valve discharge

• Drainage

• Electrical connection

• Gas pipe sizing

• Gas regulator or meter capacity

• LPG bottle setup

• Outdoor clearances

• Indoor overflow tray requirements

• Base or slab condition

• Heat pump airflow

• Condensate drainage

• Access for service and replacement

These items can affect total installed cost, even if the supply-only product price looks simple.

Common mistake: ordering the wrong gas type

Natural gas and LPG systems are different.

Before ordering a gas hot water system, confirm the fuel type. Do not guess based on the brand, shape or age of the old unit.

If you order the wrong gas type, the system may not be suitable for the property and installation may be delayed.

Common mistake: replacing an undersized system with the same size

If your old system always ran out of hot water, replacing it with the same size may continue the same problem.

This is common when:

• A couple becomes a family

• Children become teenagers

• A rental has more occupants

• A property becomes an Airbnb

• A second bathroom is added

• Shower habits change

Use replacement time to review whether the old system was actually the right size.

Common mistake: choosing heat pump without checking location

Heat pumps need outdoor airflow and drainage.

Before choosing heat pump hot water, check:

• Outdoor space

• Clearances

• Condensate drainage

• Electrical requirements

• Noise placement

• Distance from bedrooms

• Access

• Base or slab

• Household size

• Recovery time

A heat pump can be a great fit for some Perth homes, but it should be chosen based on site suitability, not just efficiency claims.

Common mistake: assuming supply-only includes installation

Supply-only means product supply. Installation is separate unless clearly shown as included.

For Perth buyers, this means arranging your own licensed local installer and confirming all site requirements before ordering.

Do not assume supply-only pricing includes:

• Plumbing labour

• Gas fitting

• Electrical work

• Valves

• Pipework changes

• Drainage

• Old unit removal

• Disposal

• Compliance upgrades

• Difficult access

• Stands, bases or brackets

Always check inclusions before purchase.

Best brands for Perth hot water replacements

Installed Today stocks well-known hot water brands across different categories. Depending on availability and system type, customers commonly compare brands such as:

• Rheem

• Rinnai

• Dux

• Vulcan

• Thermann

• Stiebel Eltron

• iStore

• Aquamax

The best brand depends on the system type, size, warranty terms, product availability, installation requirements and household needs.

You can compare brand collections such as Rheem hot water systems, Rinnai hot water systems and Dux hot water systems.

Electric vs gas vs heat pump for Perth

Here is the simple comparison:

For many Perth homes, the best starting point is the existing system type. From there, decide whether the size or technology should be upgraded.

Should Perth customers buy hot water online?

Buying a hot water system online can work well when you know what you need or already have a licensed installer helping you.

It can be useful for:

• Comparing product options

• Checking sizes and brands

• Ordering supply-only systems

• Planning a replacement

• Matching an existing unit

• Choosing between electric, gas and heat pump

• Organising product supply before installation

The key is to avoid guessing. Hot water systems are not one-size-fits-all products. Always confirm the model, size, gas type and site requirements before ordering.

Final recommendation

If you are replacing a hot water system in Perth, start with the existing system type, then check whether the size still suits the household.

For simple electric replacements, compare electric hot water systems. For gas-connected homes, compare instant gas hot water systems, making sure you choose the correct natural gas or LPG model. For efficiency-focused electric upgrades, compare heat pump hot water systems if your property has suitable outdoor space, airflow and drainage.

For Perth customers, Installed Today is best used as a supply-only hot water system source. Arrange your own licensed local installer, confirm the replacement details before ordering, and make sure the system suits your property, household size and energy source.

To compare all options, browse the Installed Today hot water systems range.

Long-tail FAQs

Does Installed Today install hot water systems in Perth?

Installed Today’s supplied-and-installed options are available on selected products in eligible Brisbane and Gold Coast service areas where shown. Perth customers should treat Installed Today as a supply-only hot water product source and arrange their own licensed local installer.

Can I buy a hot water system online for Perth?

Yes. Perth customers can compare and order supply-only hot water systems online, then arrange installation through their own licensed local plumber, gas fitter or electrician.

What is the best hot water system for Perth homes?

The best hot water system depends on your current setup, household size, energy source and available space. Electric storage, continuous flow gas and heat pump hot water are common options to compare.

What size hot water system do I need in Perth?

A small unit may suit 80L to 125L, a 1 bathroom home may suit 125L to 160L, a family home may suit 250L to 315L, and a larger household may need 315L to 400L or a suitably sized gas or heat pump system.

Is gas hot water good in Perth?

Gas hot water can be a good option for Perth homes with natural gas or LPG. The system must match the property’s gas type and be installed by a licensed gas fitter.

Is heat pump hot water good for Perth?

Heat pump hot water can suit Perth homes with suitable outdoor space, airflow, drainage and electrical setup. It may be a good efficiency-focused upgrade, but it is not ideal for every property.

Can I replace electric hot water with gas hot water?

You may be able to, but changing from electric to gas can involve gas pipework, electrical connection, water pipework, valves, drainage and compliance checks. Confirm suitability with a licensed installer before ordering.

Can I replace gas storage with instant gas hot water?

Gas storage can sometimes be replaced with continuous flow gas, but the gas supply, pipe sizing, water pressure, external location and installation requirements must be checked first.

What should I check before ordering supply-only hot water?

Check the current system type, size, gas type if applicable, location, dimensions, access, household demand, valves, electrical requirements, drainage and installer approval before ordering.

Does supply-only include installation?

No. Supply-only generally means the product is supplied only. Installation, valves, plumbing, gas work, electrical work, drainage, old unit removal, disposal and compliance upgrades are separate unless clearly shown as included.