Heat Pump Installation
Heat Pump Installation near you
In Australia the phrase heat pump usually means a hot water heat pump: a tank with a small refrigeration unit on top or beside it that pulls warmth out of the outside air to heat the water, instead of using an electric element or a gas burner. The same technology heats and cools living spaces too, but for space conditioning Australians almost always say reverse cycle air conditioning. Both are heat pumps; asking an installer which one they are quoting for avoids a genuinely confusing conversation.
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Hot water is one of the largest single energy uses in a typical home, which is why heat pump water heaters attract federal certificates and state programs, and why so many households replacing a failed electric or gas storage unit now look at one. The Clean Energy Regulator's small-scale renewable energy scheme explicitly covers air source heat pumps alongside rooftop solar and solar water heaters.
An installation is a plumbing job, an electrical job and, for two-part systems, refrigerant work as well. Where the unit goes matters more than for the appliance it replaces: the compressor makes noise, it needs air moving freely around it, and the condensate it produces has to drain somewhere sensible. Getting that placement right at quoting time is what keeps the neighbours and the household happy for the next decade.
Hot water heat pumps and reverse cycle: two different jobs, one technology
Before comparing quotes, be clear about which machine you are buying. Both move heat rather than making it, and both are called heat pumps in technical documents, but they solve different problems and are installed by different combinations of trades.
- Integrated hot water heat pump: the compressor and fan sit directly on top of the storage tank as one appliance, which makes for a simpler install and a single unit to site.
- Split or two-part hot water heat pump: the compressor sits separately from the tank and is connected by refrigerant lines, which gives more freedom in where the noisy part goes and brings refrigerant licensing into the job.
- Reverse cycle air conditioning: the same principle applied to the air in your rooms, sold and serviced as air conditioning rather than as a heat pump.
- Pool heat pumps: a third application that heats pool water and, like the two-part hot water units, involves a refrigerant circuit.
- Boosted and hybrid arrangements: some hot water units include an electric element for cold snaps or high demand, which is worth knowing about because it changes running costs and the controls you are handed.
Which licences a heat pump installation needs
Three sets of rules can apply, and which ones depend on the type of unit. Plumbing work on the hot and cold water connections, the relief valve drain and the tempering arrangements is licensed by your state or territory. The electrical connection is licensed separately: in New South Wales an electrical licence is required before undertaking any electrical wiring work regardless of the cost or type of work, and in Victoria Energy Safe Victoria licenses and registers all electrical tradespeople and the consumer is entitled to a certificate of electrical safety for the work.
Refrigerant is the third. An integrated unit arrives factory charged and sealed, so no refrigerant handling is involved in a straightforward swap. A two-part system is different: the Australian Refrigeration Council issues a restricted class of licence that covers installing and decommissioning a two-part hot water heat pump of less than eighteen kilowatts, alongside single-head split system air conditioners and two-part pool heat pumps of the same size. Larger or more complex equipment needs the full licence class, and any work involving fluorocarbon refrigerant without the right licence is a strict liability offence.
The Clean Energy Regulator ties the incentives to the licences. To create certificates, a system must meet the installer licensing requirements of the relevant state or territory government, and the regulator advises households to confirm the installer is the right person for the installation and to ask to see their licence details. That is good advice even if you never claim a certificate.
Siting, noise and drainage: the decisions made on quoting day
A heat pump water heater is not a silent appliance. It has a fan and a compressor that run for hours at a time, usually in a cycle you can schedule, so the wall it is bolted against and the window it sits under decide whether anyone notices. Under a bedroom window, in a narrow side passage between two houses, or hard against a neighbour's boundary are the placements households regret. An installer who walks the site and asks where people sleep is doing you a favour.
The unit also needs air. Because it extracts heat from the air it draws in, it wants free airflow and clearance on the intake and discharge sides rather than a sealed cupboard, and it will blow cooler air out than it took in. As it cools that air it produces condensate, which needs a drain to a legal discharge point, not a puddle against the slab. Cold and shaded sites work the machine harder in winter, so a position that catches some sun and stays out of the prevailing wind tends to perform better.
Then there is the tank itself. Replacing an existing storage unit usually means new connections, a new relief drain, possibly a new base or slab, and enough clearance to actually service the unit later. Removing the old appliance, especially a gas unit whose flue and gas connection must be dealt with by the appropriate licensed trade, belongs in the written scope before anyone starts.
Small-scale technology certificates and state hot water programs
Federal support runs through the small-scale renewable energy scheme, which gives households incentives to install small-scale systems including air source heat pumps, with eligible systems earning small-scale technology certificates. The rules are specific: only models on the Clean Energy Regulator's register are eligible, air source heat pumps must be under 425 litres, and the installation must meet state or territory installer licensing requirements. In practice the certificates are usually assigned to the installer, who discounts the invoice instead of you claiming anything back.
State and territory programs sit on top of that and change frequently. Victoria's hot water rebate, for example, requires that the product be on Solar Victoria's hot water products list and that the installation be completed by an authorised hot water retailer, with eligibility limited to owner-occupiers of existing properties. New South Wales runs household energy saving upgrades under its Energy Security Safeguard that include hot water system upgrades.
Two practical consequences follow. First, check the current terms on the program's own website before signing anything, because eligibility, product lists and closing dates move. Second, choose the installer with the scheme in mind, since an installer outside the scheme cannot deliver its discount no matter how good the quote looks.
Choosing capacity and controls for an Australian household
Sizing a hot water heat pump is about the household's peak demand rather than the floor area of the house: how many people, how many showers in the morning rush, whether a bath gets filled, and whether the laundry and dishwasher draw hot water. Because a heat pump reheats a tank more slowly than a gas instantaneous unit does, undersizing shows up as a cold shower for whoever goes last, and the element in a boosted model then does the work you bought the heat pump to avoid.
Controls decide much of the running cost. Most units let you set the hours in which they run, which matters if you have rooftop solar and want the tank heated in the middle of the day, or if your retailer's tariff has cheaper periods. Australia's climate zones also shape the choice, since a unit in a mild coastal suburb faces very different winter mornings from one in the cool temperate or alpine zones the Australian Building Codes Board defines, and manufacturers publish performance data for a reason. Ask what the unit does on a cold morning in your postcode rather than in a laboratory.
The best time of year to replace a hot water system
Hot water systems die on a schedule of their own, and most households replace theirs in an emergency, at whatever price and with whatever product is on the truck. If your existing unit is well into its second decade, planning the replacement in advance is worth real money and usually a better outcome.
The Australian calendar gives two nudges. Demand for hot water peaks in the cold months of June, July and August, which is also when heat pumps work hardest and when a failing old unit is most likely to give up, so replacing in autumn gets you ahead of that. Spring and early summer are also practical, because a longer daylight window suits outdoor work and solar owners can get the timer running the unit in the middle of the day from the start. What you want to avoid is discovering the problem on a winter weekend with no hot water in the house.
Warranties, consumer guarantees and the paperwork that supports them
Heat pump water heaters typically carry different warranty periods on the tank and on the refrigeration components, and most manufacturers set conditions about installation, water quality and servicing. Read those before choosing, since they affect what happens in year six as much as the sticker on the box does.
The Australian Consumer Law applies regardless. The ACCC is clear that consumer guarantees are automatic and cannot be taken away, and that a warranty is an extra promise made on top of them, not a substitute. Keep the invoice, the certificate for the electrical work, the plumbing compliance paperwork your state requires, any certificate assignment form from the incentive scheme, and the model and serial numbers in one place.
Heat Pump Installation: frequently asked questions
When Australians say heat pump, do they mean hot water or heating?
Most often hot water. In everyday Australian use a heat pump is a hot water system that heats water using heat from the air, while the machine that heats and cools your rooms is called reverse cycle air conditioning. Both are heat pumps in the technical sense — the refrigerant licensing rules cover both — so confirm which one a quote is for before comparing it with anything else.
Do heat pump water heaters work in cold parts of Australia?
They work across the country, but performance varies with the climate zone, and the Australian Building Codes Board's zones range from the tropical north to alpine areas. In cooler zones a unit works harder on winter mornings and some models use an electric element to boost output in those conditions. Ask the installer for the manufacturer's performance data at temperatures your area actually sees in June and July, and check whether the model is rated for your zone.
Are heat pump hot water systems noisy?
They are noticeably louder than the electric or gas storage unit most of them replace, because they have a fan and a compressor that run for hours. In practice that makes placement the most important decision on quoting day: away from bedroom windows, away from a neighbour's boundary where practical, and not down a narrow side passage that channels the sound. Running it during the day rather than overnight also helps.
Can I get a rebate or certificates for a heat pump hot water system?
Often, yes. The Clean Energy Regulator's small-scale renewable energy scheme covers air source heat pumps, with certificates available for eligible models on its register that are under 425 litres and installed in line with state or territory licensing requirements. States run their own programs as well, generally with their own product lists and accredited or authorised installers. Check the current rules on each program's own website before you sign, and ask whether the discount is applied to the quote.
Does a heat pump need a plumber or an air conditioning technician?
For an integrated hot water unit, a licensed plumber plus a licensed electrical worker for the power connection. For a two-part system where the compressor is separate from the tank, a refrigerant handling licence is also needed, and the Australian Refrigeration Council issues a restricted class covering two-part hot water heat pumps under eighteen kilowatts. Ask which trades are attending and what each one is licensed to do.
How does LokalMatch help with a heat pump installation?
You describe the job once — your postcode, the system you have now, the size of the household, and whether you want hot water or space heating — and installers who work in your area contact you. They pay LokalMatch for those requests. LokalMatch does not install anything, does not set or quote prices, and does not vet, rank or recommend any business, so confirming plumbing, electrical and refrigerant licences and checking scheme eligibility is up to you.
Sources
- Clean Energy Regulator: Small-scale renewable energy scheme
- Clean Energy Regulator: Solar water heaters and air source heat pumps
- Australian Refrigeration Council: Licence types
- Australian Refrigeration Council: Refrigerant handling licence
- Solar Victoria: Hot water rebate
- NSW Government: Household rebates, grants and schemes
- ABCB: Climate zone map of Australia
- NSW Government: Electricians and electrical licences
- Energy Safe Victoria: Electrical licences
- ACCC: Consumer guarantees
Written by the LokalMatch editorial team. Last reviewed 14 September 2026. How we write and check our guides
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What affects the cost of heat pump
Prices depend on the details of your project. We only publish price ranges when they’re backed by real LokalMatch quote data or reliable sources. Until then, here’s what usually changes the price:
- Type of system and fuel source
- Size and efficiency of the equipment
- Condition of the existing ductwork and venting
- Electrical or gas line changes
- Access to the furnace room, attic or outdoor unit location
- Removal and disposal of the old equipment
- Emergency or after-hours service
How to compare heat pump installers before you hire
- Hire a technician who is licensed for heating, cooling and gas work in your area.
- For a new system, ask for a load calculation for your home rather than a size based on the old unit.
- Get written quotes that list the equipment, ductwork changes, removal of the old unit and any electrical work.
- Ask how they handle service calls and repairs after installation, including in the middle of winter.
- Compare the full scope of each quote, not only the equipment on it.
Questions to ask heat pump installers before you hire
- Are you licensed for this type of heating, cooling or gas work in my area?
- How did you decide what size of system my home needs?
- Does this installation need a permit, and will you take care of it?
- What does the manufacturer's warranty cover, and what does your labour warranty cover?
- Will you need to change the ductwork, venting or electrical to make this work?
- Do you offer maintenance plans, and what do they include?
- How quickly can you respond if the system stops working?
When to call a pro for heat pump
- If you smell gas, leave the home and call your gas utility's emergency line from outside.
- If a carbon monoxide alarm goes off, get everyone outside and call emergency services.
- No heat in cold weather, or a furnace that keeps shutting off
- Unusual noises, burning smells or a big jump in energy use
Heat pump permits and local rules
Some heat pump work needs a permit or has to meet local bylaws. Rules vary by municipality, so ask your pro whether a permit is needed and who will apply for it — and check with your city or town if you’re unsure.
Permits and licensingSeasonal maintenance
This job is part of our home maintenance checklists for:
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