How it works

How it works enviroheat February 6, 2020
You provide 1kW electricity
Add on 3kW of FREE heat from air
Gives you 4kW of heating power
You save up to 71% on your hot water running costs
How does a Enviroheat heat pump work
To understand the concept of how an Enviroheat heat pump works, imagine your refrigerator / freezer working in reverse
Free heat

While a refrigerator removes heat from within 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 an enclosed tank.


Enviroheat 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.

The fan draws in the air containing heat energy, across an evaporator
The evaporator turns the liquid refrigerant into gas
The compressor pressurises the refrigerant liquid into hot gas
The hot gas inside the condenser coil heats the water inside the tank
The refrigerant reverts back to a liquid after expansion & continues back to the evaporator for the process to start all over again

Micro-channel condenser

Larger contact surface for better heat transfer and less refrigerant consumption.


Heat pump compressor

Specially designed for heat pumps to maximise the efficiency.


Bottom coil

Design enlarges the total heat exchange area to deliver more hot water.


No fixed wiring

Simply plug the unit into a 10 Amp power point, no fixed wiring required.


Dual anodes

Twice the corrosion protection with dual full length anodes. Reduces costly maintenance.


Multiple channel design. The multi channel condenser design divides flow into eleven galleries with greatly improved heat transfer over a single pipe


Titanium aluminium allow for better corrosion and heat resistance. The multichannel condenser withstands corrosion for 7.5 times longer than copper pipe condenser.


Reduced pressure drop improves compressor efficiency by 6%. Micro channel pressure drop 0.03Mpa. Compare that to a standard coil pipe with 0.15Mpa.


Larger contact surface to improve heat transfer efficiency by 30%. Improved heat transfer means improved efficiency. Up to 71% cheaper to run than conventional hot water systems.

Some of the benefits from installing an Enviroheat heat pump hot water system
Energy savings of up to 71% compared to a conventional electric hot water system
Over a 10 year period approximately 30,000 kWh worth of energy is saved
A 5 year complete replacement warranty for any storage tank or mechanical failure
All Enviroheat tanks have the added protection of 2 sacrificial anodes fitted
Reducing greenhouse gas emissions and your home's carbon footprint
Enviroheat heat pumps convert 1kW of electricity into over 4kW of heat
Instructional Video Series
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There are no regulations that require the energy efficiency of heat pump hot water systems sold in New Zealand and Australia to be tested to a common standard, to carry labels indicating their energy efficiency or other key aspects of performance or to meet any minimum prescribed levels of energy efficiency or performance.

To provide a comparison, Australia does have a 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 of a hot water system,  being 10 years.

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).


The Enviroheat has been tested under the Australian Government and has been issued a STC rating of 30. Now that is a 30,000 kWh of energy consumption saved over a 10 year period

Clean Energy Regulator
Enviroheat 31 STC
Enviroheat heat pump will save approximately 31,000 kWh of energy 71%
Stiebel Eltron WWK302H 30 STC
Stiebel Eltron heat pump will save approximately 30,000 kWh of energy 65%
Rinnai EHPA Range
Rinnai Enviroflo heat pump saves approximately 29,000 kWh of energy 61%
Bosch Compress 3000 28 STC
Bosch Compress 3000 heat pump will save approximately 28,000 kWh of energy 57%
Rheem 310 27 STC
Rheem heat pump will save approximately 27,000 kWh of energy 54%
Dux Airoheat 27 STC
Dux Airoheat heat pump will save approximately 27,000 kWh of energy 54%

Soak up free energy from the sun

You can store up to 18kW of heat energy in one Enviroheat tank ready to use when the sun has gone down.

enviroheat heat pump saves energy and money
We are that confident...
5 Year replacement warranty: if your cylinder or compressor fail within 5 years we will replace it with a BRAND NEW UNIT.

Electronic parts and labour are warrantied for one year. Conditions apply.
Some techy stuff

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

The vents are situated on top of unit, so the install space is smaller than our competitors. The unit is the only unit on market that has intake and outlet comes out top and also under a cover.

Specially designed for Enviroheat 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 Enviroheat heat pump

Energie Group Products-6574
Energie Group Products-6574

Convinced of the benefits?

  • It offers the best performance of any system in its class with up to a massive 71% saving in energy when compared to a conventional electric and LPG gas 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
  • The Enviroheat system has undergone rigorous testing and has been certified by the New Zealand and Australian Government
  • All Enviroheat hot water tanks are also protected by not one, but two sacrificial anodes for a extra longer storage tank life
  • Each unit has an advanced control system that is feature packed and above all, easy to use. 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 dual anode protect storage tank makes EnviroHeat the natural choice for an energy efficient home in New Zealand