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Heat pump hot water systems are becoming an increasingly popular choice for Australian households looking to reduce energy consumption and lower running costs.
Once you've decided a heat pump is right for your home, another important question remains: should you choose an integrated heat pump or a split heat pump system?
Both options offer excellent energy efficiency and reliable hot water, but they differ in how they're designed and installed. Understanding these differences can help you choose the right solution for your home's layout and hot water needs.
Quick Answer
For most Australian homes, an integrated heat pump offers the simplest installation and a compact all-in-one design.
A split heat pump may be the better option if you need greater flexibility in where the tank or outdoor unit is located.
Both system types can significantly reduce energy use compared with conventional electric storage water heaters and may be eligible for government incentives depending on your location.
What Is the Difference Between an Integrated and Split Heat Pump?
The key difference is how the components are arranged.
Integrated Heat Pumps
An integrated heat pump combines the compressor, fan and storage tank into a single outdoor unit. Everything is housed together, making installation straightforward and reducing the number of components that need to be installed.
Split Heat Pumps
A split heat pump separates the outdoor heat pump unit from the storage tank. The tank can be installed in a sheltered location, while the outdoor unit is positioned separately. Rinnai's split heat pumps use water line connections between the tank and the compressor rather than a refrigerant. This means that the requirement for a refrigeration technician isn't needed. This design allows installation to be carried out by licensed plumbers, with a qualified electrician completing the electrical work.
The system's design provides greater flexibility when site access, tank location or outdoor space is a consideration.
Integrated vs Split Heat Pumps: Comparison at a Glance
Feature | Integrated | Split |
Installation | Simpler | More complex |
Components | All-in-one unit | Separate tank and outdoor unit |
Placement Flexibility | Moderate | High |
Tank Location | Fixed with unit | Can be installed separately |
Best For | Standard home installations | Complex layouts and flexible placement |
Why Choose an Integrated Heat Pump?
An integrated heat pump is often the preferred choice for homeowners looking for a straightforward replacement for an existing electric storage water heater.
Benefits include:
Simpler installation
Compact all-in-one design
Suitable for most residential applications
Excellent energy efficiency
The Rinnai Enviroflo AR and GR Series are integrated heat pump systems designed to deliver efficient hot water while helping reduce household energy consumption. With multiple capacity options available, they can accommodate a wide range of household sizes and hot water demands.
Why Choose a Split Heat Pump?
A split heat pump can be an excellent solution where installation flexibility is important.
Benefits include:
Greater flexibility in tank placement
More options for positioning the outdoor unit
Suitable for homes with unique layouts
Easy access to individual system components
The Rinnai Enviroflo S Series offers a split-system solution designed for Australian conditions and can operate in temperatures as low as -10°C, making it suitable for a wide range of climates.
Which Heat Pump Hot Water System Is Best for Your Home?
The best choice depends on your home's layout, available space and hot water requirements.
An integrated heat pump may suit homeowners who:
Want a straightforward installation
Have suitable outdoor space available
Prefer a single all-in-one unit
A split heat pump may suit homeowners who:
Want the tank installed indoors
Need greater flexibility in system placement
Have a more complex property layout
For many households, an integrated heat pump offers the simplest path to energy-efficient hot water, making it the preferred choice when simplicity and easy installation are the priority. Split systems, on the other hand, offer valuable flexibility in tank and outdoor unit placement, making them the better fit when installation requirements are more specialised.
Explore the Rinnai Enviroflo range to compare features, capacities and performance and find the heat pump hot water system that's right for your home.