Envirosun Heat Pump


Envirosun Heat Pump

Envirosun all in one heat pump is called the HP Plus and is a class leader in performance, quality and warranty. The “Enviro Heat Pump” is just plain and simply a high performing, very reliable and durable heat pump water heater that is built by the best makers of refrigeration and air conditioning globally

Produced under an exclusive license with Envirosun by the world’s largest appliance manufacturer known for brands such as Haier, General Electric, Fisher and Paykel, Candy, Casarte and Leader just to name a few,  this heat pump hot water system was initially introduced into Europe over a decade ago and has proven to be a very reliable performer, even in temperatures as low as -7°C.  When you bring that to our warmer environment the efficiency and heating recovery time ability increases dramatically.

The Envirosun “HP Plus” heat pump offers a massive 71% saving in energy usage when compared to a conventional electric and LPG gas storage hot water heaters

A Boost feature is also added for rapid heating when you have extra people in your home, so you will never go without hot water.

Internal installation ventilation kit is available for the Envirosun HP Plus

No room outside for a hot water tank? With property sizes shrinking and homes being built closer to the boundary lines, with this revolutionary innovation designed and exclusive use for the Envirosun HP Plus heat pump, eliminates a problem and creates a solution


The Envirosun HP Plus heat pump or the Enviro Heat Pump (as it is also known as) hot water system has undergone rigorous testing and has been certified by the Australian Government Clean Energy Regulator and attracts a higher STC rating than most other brands of monoblock heat pumps in the Australian hot water market.

All Envirosun heat pump hot water tanks are also protected by not 1, but 2 sacrificial anodes for a longer storage tank life

The Enviro heat pump range has an advanced control system that is feature packed and above all, easy to use. It can be programmed to maximize the use of rooftop solar power systems whilst not compromising a plentiful supply of steaming hot water when you need it. The automatic sanitisation feature ensures that your family is safe from legionella and other water borne bacteria.

The combination of whisper quiet operation, smart controls, superior UV protection and generous government rebates makes Envirosun HP Plus is the natural choice for an energy efficient home.


The micro-channel condensers has larger contact surface for better heat transfer performance and less refrigerant consumption. Envirosun Heat Pumps are exceptional in recovery heating times


Specially designed for Envirosun heat pumps to maximise efficiency.


Extra bottom coil design enlarges the total heat exchange area to deliver more hot water and contributes to better efficiency on Envirosun heat pumps


To understand the concept of how an Enviro Heat Pump works, imagine your refrigerator / freezer working in reverse. While a refrigerator / freezer removes heat in the closed box and expels that heat to the surrounding air, a Heat Pump takes the heat from surrounding air and transfers it to water in the hot water storage tank

Envirosun HP Plus heat pump technology makes the efficient use of heat in the surrounding air, even at temperatures as low as -7C. In fact the Enviroheat heat pump hot water system is so efficient that it can convert 1kW of electricity into over 4kW of heat.

  1. The fan draws in the air containing heat energy, across an evaporator

  2. The evaporator turns the liquid refrigerant into gas

  3. The Enviro heat pump compressor pressurises the refrigerant liquid into hot gas

  4. The hot gas inside the condenser coil heats the water inside the tank

  5. The refrigerant reverts back to a liquid after expansion & continues back to the evaporator for the process to start all over again.


Check out some of the comparisons here on different heat pump hot water heater brands and the Australian Government tested and allocated STC rating, the STC is a rated saving that a hot water system has been granted after testing and approved by the  Australian Clean Energy Regulator.  

The number of STC’s that are issued refers to one megawatt hour (1 MWh) of avoided energy consumption over the heat pump hot water system’s deemed life expectancy.

STC’s value drop 10% every year due to phase out of this rebate, This does not reflect the calculation from the conception to 2021 rate

Envirosun 200 lt and 250 lt Enviro Heat Pumps receives 29 STC
Enviroheat 29000 kWh saving 71%
Stiebel Eltron Heat Pump receives 28 STC
Stiebel Eltron 28000 kWh saving 66%
Bosch Compress 3000 Heat Pump receives 27 STC
Bosch 27000 kWh saving 61%
Rheem Mpi Heat Pump receives 27 STC
Rheem 27000 kWh saving 61%
Rinna 315 Heat Pump receives 27 STC
Rinnai 27000 kWh saving 61%
Solahart 325HAV Heat Pump receives 27 STC
Solahart saving 27000 kWh saving 61%
Dux Airoheat Heat Pump receives 26 STC
Dux 26000 kWh saving 56%

S =  R – T  

where: S: STC count

R: Reference conventional system’s energy consumption (MWh over ten years)

T: Tested system’s estimated energy consumption (MWh over ten years)

Here is a graph showing savings and ratings of STC assigned to Thermosyphon solar hot water systems and the approximate percentage of power saving  compared to a conventional electric water heater in zone 3

Envirosun is pleased to announce that on the 14th January 2021, the ENVIRO HEAT PUMP hot water system range of energy efficient water heaters has been endorsed as an approved hot water system to be used by Western Australian Housing Authority

More Products in the Envirosun Water Heater Range

Envirosun TS Solar Hot Water

Envirosun AS Solar Hot Water