Our Recommended Hot Water System: Thermann Hot Water Systems

Thermann solar and electric storage

Our preferred brand for installation at HPG Solutions for Hot Water Systems is Thermann. Thermann Hot Water is a 100% Australian-owned brand committed to the highest quality manufacturing standards to meet the demands of the modern-day household.  Thermann Hot Water systems are rigorously tested to meet Australian standards, but more importantly, the standards we set for ourselves. When choosing a hot water system, it is important to consider the size of your household, your energy usage, and your budget. Each type of Thermann hot water system has its own benefits, and the best one for you will depend on your individual needs.

Gas Continuous Flow

These systems heat water on demand, which means that you will never run out of hot water. They are also very energy-efficient, as they only heat the water that you need. Gas continuous flow hot water systems are suitable for small to medium-sized households.

How it works

  1. A hot water tap is turned on
  2. Water enters the heater
  3. The water flow sensor detects the water flow
  4. The computer automatically ignites the burner
  5. Water circulates through the heat exchanger
  6. The heat exchanger heats the water to the designated temperature
  7. When the tap is turned off, the unit shuts down
Thermann hot water system - gas continuous flow diagram

Gas Storage

Thermann Gas Storage Hot Water Systems are suited to families of 3-5 people. With an adjustable thermostat for safety and efficiency, it allows you to be in control of your operating costs and performance.

  • 4-star efficiency
  • Full mains pressure taps
  • Small footprint – easy replacement
  • Includes a Pressure and Temperature Relief (PTR) Valve

How it works

  1. Cold water enters through the pipe at the bottom of the tank
  2. A gas burner located under the tank begins to heat the tank
  3. The hot exhaust gases from the burner travel up the side of the tank further heating the water to the desired temperature
  4. The hot water progressively rises to the top of the tank. When a tap inside the home is turned on, the hottest water then exits at the top of the tank where it flows to the user’s location
  5. To ensure the water stays at the right temperature, a thermostat constantly measures the water temperature and turns the burner on the or off as needed

Electric Storage

Thermann Electric Storage hot water systems heat water in an insulated tank by an electric element, like a giant kettle. They’re quick and easy to install and are available in a wide range of sizes to suit your needs making them an affordable way to get your hot water now.

How it works

  1. A hot water tap is turned on
  2. Hot water is drawn from the top of the tank
  3. Cold water enters through the bottom of the tank
  4. When temp around the element drops, element activates
  5. Hot water rises to the top of the tank

Heat Pump

Combining a Japanese and Australian engineering, The Thermann X Split Heat pump is a flexible, quiet, and highly efficient hot water solution for any climate. By extracting heat from the air, this clever system uses a naturally occurring gas to heat water making it up to 80% more efficient than that of a standard electric storage system.

  • High efficiency
  • Flexible installation options for areas of limited space
  • Quiet operation (37dB)
  • Fast recovery rate
  • Government Rebates available (STC)
  • Block out mode for areas with on and off-peak tariffs as well as optimising PV Solar
  • Natural refrigerant – Ozone friendly
  • Mains pressure hot water

How it works

  1. Cold water is drawn from the tank into the heat pump unit
  2. A fan draws air through the evaporator where the heat from the air is transferred to a natural refrigerant gas
  3. The heated gas is circulated around a compressor, increasing the pressure and temperature
  4. The hot gas passes through a heat exchanger to heat the cold water, which is then pumped back into the top of the storage tank ready to use
Thermann heat pump diagram how it works


These systems work by using solar panels to heat water. They are the most energy-efficient of all the hot water systems and can save you a significant amount of money on your energy bills. Solar hot water systems are suitable for all households, but they require a sunny location.

How it works

  1. The sunlight strikes the dark absorber coating inside the evacuated tube
  2. The heat pipe transfers the heat up to the copper header pipe location in the insulated manifold box
  3. A circulator moves water from the storage tank to the copper pipe warming the water. The solar-heated water is then pushed down into the storage tank for use. Anti-frost is built in to the Thermann system to ensure solar hot water can be provided even in cold regions.
Thermann Solar diagram how it works

Save with solar

When it comes to lowering your power bills, Thermann is the right investment of choice for the long term. when paired with the solar tube components, it provides lower running costs, making it the smarter, more sustainable and affordable alternative to the traditional systems. It’s also better for the environment. In times of high sun exposure the system will use 100% of its energy from the sun, using 0 mains electricity.