Case study: Heat pump water heaters are a smart, energy-efficient solution especially for homes where a traditional rooftop solar water heater may not be suitable.

Learn why Conrad Martens Plumbing & Hot Water recommended and installed the Rheem AMBIHEAT® HDc-270 Heat Pump as a replacement for an old water heater.

The Brief

Craig and Louise live in a three-bedroom, two-bathroom home in Kenmore – a leafy inner western suburb in Brisbane. For almost 20 years, they benefited from having hot water provided economically by their trusted Rheem heat pump. When it came time to replace their old system, they contacted residential hot water specialist, Conrad Martens Plumbing & Hot Water, to discuss their options and provide them with a solution.

Original Rheem Heat Pump System – Almost 20 Years Old


After considering their hot water requirements and desire for an energy-efficient and reliable option, the Rheem AMBIHEAT® HDc-270 Heat Pump was deemed as the best solution. It was an easy choice for Craig and Louise, who have first-hand experience of the savings Rheem heat pumps can deliver on hot water energy consumption.

Heat pumps draw heat from the surrounding air to heat water. The open outdoor location, combined with the local Brisbane weather conditions, suited this system well.

The availability of the Rheem AMBIHEAT® HDc-270 Heat Pump meant the installation could be arranged immediately, and the design made for a straightforward replacement. Also, the 270 litre capacity ensures Craig and Louise will have plenty of hot water for their home.

The Conrad Martens Plumbing & Hot Water team had the new heat pump installed and operational before lunch, allowing Craig & Louise to be back in hot water on the same day.

The Kit

  • Rheem AMBIHEAT® HDc-270 Heat Pump.
  • Valves, pipework, drain line and pipe insulation provided by Conrad Martens Plumbing & Hot Water.

Boasting a range of market-leading features designed and manufactured for Australian conditions, the new generation Rheem AMBIHEAT® HDc-270 Heat Pump was a clear winner. Some of the great benefits include:

  • Savings of up to 73% on hot water energy consumption compared to a similar-sized electric system¹.
  • An impressive 7-year cylinder warranty².
  • Reliable supply of hot water for a family of up to five people thanks to microchannel heating technology which provides uniform and faster heat-up times.

    Rheem residential hot water case study: Conrad Martens Plumbing & Hot Water recommended and installed the Rheem AMBIHEAT Heat Pump
    Case Study: New Rheem AMBIHEAT HDc-270 Heat Pump installed for Craig and Louise


Rheem AMBIHEAT® HDc-270 Heat Pump is suitable for all weather conditions with an operating range of -5 to 43ᵒC³. If you are looking to replace your current water heater and wish to explore your options, contact Rheem or speak to your local plumber today.


  1. Energy savings of up to 73% are based on Australian Government approved TRNSYS simulation modelling using a medium load in Zone 3 and apply when replacing a storage electric water heater of similar size with a Rheem 551270 Heat Pump water heater. Any savings will vary depending upon your location, type of water heater being replaced, hot water consumption and fuel tariff. The impact on an electricity account will depend on the tariff arrangement of the water heater being replaced and where you live.
  2. Warranty Periods: 7 years supply on cylinder, 3 years labour on cylinder, 3 years supply on sealed system including labour, 1 year supply and labour on all other parts. Applies to a single-family domestic dwelling only. Conditions apply. See the Rheem warranty set out in the Owner’s Guide and Installation Instructions or view at
  3. The specified -5˚C to 43˚C temperature range is the operational range of the Heat Pump. The electric element activates when the ambient air temperature is outside this range and heating of the water is required.

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