Hot Water System Upgrade

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Heat Pump Hot Water Systems

Replace your current System with an Energy-Efficient one with major discounts on units and installation thanks to the Retailer Energy Productivity Scheme (REPS).

We offer high-quality Hot water systems through our accredited installation partners. Furthermore, you can rest assured that all components, tanks, and electronics come with a 5-year warranty.

On top of that, these hot water systems are environmentally friendly, as they utilise refrigerant R290, a very low environmental impact (GWP below 1:5) and excellent thermodynamic performance refrigerant.

Get maximum efficiency and performance with minimal environmental impact.

 Explainer – Heat Pump Hot Water Service 

Emerald Heat Pump Hot Water Systems

YESS now offers the Emerald Heat Pump Hot Water System in Adelaide, an efficient hot water system that helps you save energy and money.

Why choose the Emerald Heat Pump Hot Water System in Adelaide?

Switch to an energy-efficient solution that delivers reliable hot water while cutting down on running costs. The Emerald All-In-One Pro Series is designed for Australian conditions and comes in a range of sizes to suit every household.

  • From just $1,950* – supply & installation included
  • Price inclusive of REPS and STCs
  • Available in 220L, 270L and 320L models
  • Manufacturer Warranty: 7 years tank, 5 years parts, 5 years labour
  • Quiet operation, efficient performance, and environmentally friendly design
  • Only applicable when replacing an eligible existing hot water system
Download Brochure

*The indicated price includes supply of the unit, the installation service in a standard HWS replacement setting, as well as REPS subsidy and STC rebate. Eligibility terms and conditions apply.

Three Sizes

220L, 270L, 320L

Warranty

7 years tank, 5 years parts, 5 years labour

Remote monitoring

Control and manage anywhere, anytime, with Emerald App

Usage trends

View energy and water usage in real time with Emerald App

Register your Interest

Upgrade your home with an Emerald Heat Pump Hot Water System today.

Register your Interest below. Our team will contact you to discuss how to apply for the offer.

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    REPS Activity
    Terms and Conditions

    (1) The water heater must be installed in accordance with relevant installation standards including, but not limited, to AS/NZS 3500:2018 (plumbing and drainage standards); AS/NZS 3500.4:2018 (Plumbing and drainage – Heated water services), AS 4552:2010 (gas hot water systems); AS/NZS 60335.2.21:2013 (electric storage water heaters); AS/NZS 60335.2.35:2004 (instantaneous water heaters).
    (2) All products shall be installed in accordance with the manufacturers’ installation instructions and specifications.
    (3) Any replaced water heater must be removed from the premises.
    (4) The activity must be completed and certified in accordance with any relevant code or codes of practice and other relevant legislation applying to the activity, including any licensing, registration, statutory approval, activity certification, health, safety, environmental or waste disposal requirements.
    (5) Where required, a Certificate of Compliance must be provided and retained for verification purposes.

    Gas water heater or solar gas means a water heater that has a primary or boost fuel source of natural gas (methane) or LPG. Class 1 and class 2 dwellings are as defined by the National Construction Code.

    Install or replace a water heater.

    A new or replacement water heater installed to service a South Australian
    • established class 1 dwelling, or
    • class 2 dwelling (new or established), or
    • Small energy consuming customer

    The following is excluded:
    • Installation of a water heater undertaken as part of class 1 building work requiring approval under the Development Act 1993 or the Planning, Development and Infrastructure Act 2016. This includes water heaters installed to service a new class 1 dwelling.

    – Each REPS activity can only be provided once per address.

    (1) Only gas, solar electric, solar gas or heat pump water heaters are included in the specification.
    (2) Gas water heaters shall be rated at a minimum of 5 stars in accordance with AS4552 and listed in the Directory of AGA Certified Products.
    (3)(a) Solar electric and gas boosted solar systems with a tank size ≤ 220 litres installed before 1 January 2022 shall earn ≥ 17 STCs for Zone 3.
    (3)(b) Solar electric and gas boosted solar systems with a tank size ≤ 220 litres installed on or after 1 January 2022 shall earn ≥ 15 STCs for Zone 3.
    (4)(a) Solar electric and gas boosted solar systems 220 < tank size ≤ 400 litres installed before 1 January 2022 shall earn ≥ 27 STCs for Zone 3.
    (4)(b) Solar electric and gas boosted solar systems 220 < tank size ≤ 400 litres installed on or after 1 January 2022 shall earn ≥ 24 STCs for Zone 3.
    (5)(a) Solar electric and gas boosted solar systems 400 < tank size ≤ 700 litres installed before 1 January 2022 shall earn ≥ 38 STCs for Zone 3.
    (5)(b) Solar electric and gas boosted solar systems 400 < tank size ≤ 700 litres installed on or after 1 January 2022 shall earn ≥ 34 STCs for Zone 3.
    (6)(a) Heat pump water heaters installed before 1 January 2022 shall earn ≥ 27 STCs when assessed under AS/NZS 4234 for Zone 3 and shall earn ≥ 26 STCs when assessed under AS/NZS 4234 for Zone 4.
    (6)(b) Heat pump water heaters installed on or after 1 January 2022 shall earn ≥ 24 STCs when assessed under AS/NZS 4234 for Zone 3 and shall earn ≥ 23 STCs when assessed under AS/NZS 4234 for Zone 4.

    (1) The water heater must be installed in accordance with relevant installation standards including, but not limited, to AS/NZS 3500:2018 (plumbing and drainage standards); AS/NZS 3500.4:2018 (Plumbing and drainage – Heated water services), AS 4552:2010 (gas hot water systems); AS/NZS 60335.2.21:2013 (electric storage water heaters); AS/NZS 60335.2.35:2004 (instantaneous water heaters).
    (2) All products shall be installed in accordance with the manufacturers’ installation instructions and specifications.
    (3) Any replaced water heater must be removed from the premises.
    (4) The activity must be completed and certified in accordance with any relevant code or codes of practice and other relevant legislation applying to the activity, including any licensing, registration, statutory approval, activity certification, health, safety, environmental or waste disposal requirements.
    (5) Where required, a Certificate of Compliance must be provided and retained for verification purposes.

    Heat Pump Hot Water – Common Questions

    A heat pump is a clever device that moves heat from one place to another, which makes it useful for heating, cooling, and even refrigeration. The best everyday example is your fridge. At the back, down near the bottom, there’s a small compressor that pushes a special fluid called refrigerant around. As it cycles, the fridge pulls heat out from inside and dumps it out the back. That heat then drifts upward, while the inside of the fridge gets chilled over time.

    A heat pump hot water system works a bit like a fridge in reverse. Instead of pulling heat out of the fridge and releasing it outside, it takes heat from the surrounding air and transfers it into a water cylinder. This process can heat the water up to around 60 °C, while the air around the unit becomes cooler.

    Heat pump hot water systems (HWS) come in two main types: split and integrated.

    • Split systems keep the storage cylinder separate from the evaporator, fan, and compressor, connected by refrigerant piping. They’re usually quieter and more efficient, but come at a higher price.
    • Integrated systems combine everything in one unit, with the storage cylinder at the bottom and the working parts on top.


    Both options work well, though at YESS we often see integrated systems more commonly.

    Yes! Heat pumps use 60–75% less energy than conventional hot water systems. With rising natural gas prices and increasing regulations, they’re also a smart, future-ready alternative.

    Not really! Heat pumps can work almost anywhere, even in cold climates. They draw on the heat that’s always present—much like a fridge pulls heat from its interior. While heat pump hot water systems are most efficient in warmer conditions, households in the Adelaide Hills or southern parts of the state can still enjoy strong performance and worthwhile savings throughout winter compared to traditional electric or gas systems.

    (And when we say “heat,” we mean energy—so even when it feels cold to us, there’s still usable heat for the pump.)

    Yes—but much less than traditional hot water systems! Heat pumps are smart and energy-efficient, and you can save even more if you plan carefully.

    • Timers or smart apps – Even without solar, you can schedule your heat pump to run during off-peak or cheaper electricity times, keeping costs down.
    • Holiday mode – Many systems let you reduce heating to a minimum while you’re away, so energy isn’t wasted.
    • Solar or battery power – If you have solar panels (or solar plus a battery), your heat pump can run on clean, renewable energy. That’s a big win for low-cost, green living.

    Not really. Good models run at 40–50 dB—a low hum, similar to a fridge or air conditioner. Advanced insulation and vibration-reduction technology keep noise minimal. If you’re concerned, unit placement can be optimised during installation. Make a note on the YESS’ expression of interest form to explore options.

    Most heat pumps are made in China, but origin doesn’t always determine quality. Some Chinese-made models are world class. Some units are assembled or repackaged in Australia using imported components. If you have a preference, just ask before purchasing.

    The reheat rate (or recovery rate) is how fast a heat pump can heat water back up for use, measured in litres per hour. It’s important if your household uses a lot of hot water. If you’re more conservative, it may not matter much—but if you love long hot showers, choose a system with a strong reheat rate so you’re never left cold.

    Some heat pumps also have backup boosters to help when the outside air is cooler.

    Other factors that affect how quickly your water heats:

    • Ambient conditions – air temperature, humidity, and how well the area around the unit is ventilated.
    • System design – split systems with Japanese-made compressors perform best, though they come at a premium.
    • Incoming water temperature – colder in winter, warmer in summer.

    Warranties usually cover a few key parts:

    • Tank/cylinder: 5–15 years
    • Heat pump/compressor: 2–8 years
    • Labour: 2–5 years
    • Other parts (like the electronic controller): 2–5 years

    Remember, a warranty is only as good as the company behind it. Always check both the coverage and that you’re comfortable with the supplier—after all, a long warranty doesn’t help if the company can’t honour it.

    Picking the right size ensures hot water when you need it, without paying for more than you use.

    • Bigger isn’t always better – If your household uses water steadily throughout the day, a smaller tank with a strong recovery rate can be more effective than a huge tank.
    • Peak usage matters – If everyone showers around the same time, a larger tank makes sure there’s plenty of hot water quickly.

    Tank sizes (typical):

    • 150–200 L → 1–3 people
    • 300–400 L → 6+ people

    Can’t decide? Jot it down in the expression of interest form and get guidance to help you decide.

    Get in touch to find out more

    We’re here to help – any questions, please get in touch!

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    1300 894 745