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Integrated heat pumps
Tank and compressor in one compact unit. The simplest swap for an old electric or gas storage tank, ideal for tight side paths and courtyards.
All-in-one replacement
Melbourne heat pump hot water specialists
Endless hot water,
60–75% less energy.
Swap an ageing electric or gas system for a heat pump hot water system, sized for your household and installed by licensed Melbourne plumbers and electricians.
- Fixed price supply & install
- Old unit removed and recycled
- Runs beautifully with solar
- 18,900+ products installed
Get A Free Quote.
Tell us about your household and current hot water system — our team will be in touch with sizing advice and a price. Fields marked * are required.
Premium Heat Pump Systems.
Hot water, reinvented
Endless hot water, without the big energy bill.
Hot water is usually the biggest single energy user in an Australian home. A heat pump doesn’t create heat — it moves warmth from the air into your tank, which is why it can use 60–75% less electricity than a conventional electric system.
Pair it with a timer set for the middle of the day and your solar panels can do most of the heating for you. No gas connection, no burner, no standing charge.
Find your fitOur systems
Three ways to heat your water.
The right choice comes down to your space, your household size and how cold it gets where you live.
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Split system heat pumps
The tank sits separately from the compressor, so it can be positioned quietly away from bedrooms and windows while keeping large volumes of hot water.
Flexible placement
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CO₂ heat pumps
Natural refrigerant units that keep performing through cold Melbourne mornings, with hotter delivery temperatures for bigger households.
Best for cold climates
Ask us about rebates.
Victorian and federal incentives can reduce the cost of replacing an old electric or gas hot water system. Eligibility depends on your property and existing unit — we’ll check it with your quote.
How it happens
From first call to hot water in four steps.
01
Free phone consult
We talk through your current system, household size and where the new unit could sit.
02
Sizing and quote
You get a fixed price with the right tank capacity for your daily hot water use.
03
Installation day
Licensed plumbers and electricians remove the old unit and install the new one, usually in a few hours.
04
Set up and support
We commission the system, set the timer to suit off-peak or solar, and show you the controls.
Thoughtful by design
Hot water where it counts.
Back-to-back showers, a full dishwasher and the washing machine running — your system should handle a normal morning without a second thought. We size and position every install around how your household actually lives.
Tank capacity matched to your daily hot water use
Quiet placement away from bedrooms and neighbours
Timer set for off-peak power or your solar hours
Old unit removed, disposed of and recycled
Words from our customers
5 star rated. Good people.
★★★★★
“This crew that came along was an awesome experience with plenty of knowledge. They were very welcoming and friendly. Very organised and easy to deal with. 10/10 would recommend.”
★★★★★
“We are grateful to engage with a highly professional and reliable company. Alex and his team looked after our install today and we are very happy. Thank you.”
★★★★★
“Happy with the service we received. Alex was amazing, gave us the right advice for our hot water. Couldn’t be happier, highly recommend.”
Reviews published on the OneWorld EcoSolutions website via its Google reviews widget.
Common questions
A little more clarity.
Everything homeowners usually ask us before switching to heat pump hot water.
How does a heat pump hot water system work?
Rather than generating heat with an element or a gas burner, a heat pump draws warmth out of the surrounding air and moves it into the water in the tank. It’s the same technology as a reverse-cycle air conditioner, which is why it can use 60–75% less electricity than a standard electric tank.
Will it still work through a Melbourne winter?
Yes. Modern units are designed for Australian conditions and include an electric booster for cold snaps or unusually heavy use. CO₂ models hold their efficiency particularly well in low overnight temperatures.
Is a heat pump noisy?
A quality unit runs at around conversation level and only while it is heating. We help choose a position away from bedroom windows, and split systems let the compressor sit further from living spaces.
What size tank do I need?
It depends on how many people live in the home and when you use hot water. As a rough guide, 170–200L suits 1–3 people, 250–280L suits 3–5, and larger households usually go 300L or more. We confirm sizing before quoting.
Can I run it on solar?
Absolutely. We can set the timer to heat during the middle of the day so the system uses your solar generation rather than grid power, which pushes running costs down even further.
How long does installation take?
Most straightforward replacements are completed in a single visit of around three to five hours, including removal and disposal of the old unit.
Ready when you are
Let’s get your hot water sorted.
Tell us about your current system. We’ll handle the rest.