Have you ever stopped to consider what the key contributors to your monthly power bill are? You may be surprised that on average, domestic hot water heating accounts for 28% of the energy bill in New Zealand homes, and when combined with heating your home, a whopping 67% of the overall energy bill!*2
So if you are trying to find ways to make significant savings on your power bill, domestic hot water heating is an obvious area to target. Up to now the majority of hot water in New Zealand is heated by traditional electric hot water cylinders – but is there another, more energy efficient way to do this?
The answer is yes, and it’s called Hot Water Heat Pump Technology.
*1 When compared to traditional water heating. Estimated using COP data based on BSEN14511 standard rating conditions. 7°C outdoor temp, 35°C outlet water temp. The BSEN14511 testing relates to the heat pump performance only and not the entire heating system.
*2 Based on BRANZ study report SR221, 2010, verified by EECA.
Many years ago, when heat pumps were first introduced to New Zealand, it did not take long for Kiwis to quickly embrace this super energy efficient technology to keep their homes and families warm all winter long.
So it should come as no surprise that the same heat pump technology that revolutionised home heating in New Zealand can be just as effective and efficient at heating your hot water.
The efficiency of a heat pump is known as the Coefficient of Performance or COP. This is a ratio of the heat delivered to power consumed. For every 1kW of electrical input energy, Ecodan absorbs freely available heat energy from the outdoor air to provide the home with an average of at least 3.2kW*1 of heat output.
Compared to typical gas and direct electric heating systems that can have higher running costs with inefficient COPs as low as 0.82*2, Ecodan Hot Water Heat Pumps provide a real energy efficient alternative.
*1 As independently tested by BSRIA based upon BSEN14511 Part 3 standard rating conditions. Due to the method of operation, the performance of heat pumps will vary based upon the temperature of the heat source and the requirements of the heat delivered.
The BSEN14511 testing relates to the heat pump performance only and not the entire heating system.
*2 Based on manufacturer information for gas instant hot water heater (non-condensing).
Since 1994 Mitsubishi Electric have utilised their heat pump technology leadership and expertise to specifically design and manufacture hot water heat pump solutions. The range is called Ecodan and is now well and truly established in Japan and Europe as the preferred way to heat water efficiently with minimal environmental impact.
With the full range of Mitsubishi Electric Ecodan Hot Water Heat Pump solutions now available right here, it’s New Zealand’s turn to reap the benefits.
The estimated return on investment of an Ecodan hot water heat pump, when compared to a gas or direct electric heating system, could be as low as 4 years*1.
There are ways of reducing this payback period further, such as taking advantage of lower cost nightly electricity tariffs available; reducing homeowners’ energy bills by heating the hot water cylinder during the night.
Large households with high hot water usage could bring the payback period down significantly.
Savings on your hot water and heating costs could be up to 70%*2 when compared to traditional water heating.
*1 Payback period comparison based on average energy supplier costs per kWh. Actual return on investment may vary in line with gas and electricity price fluctuations and seasonal conditions. This is an estimate only.
*2 Estimated using COP data based on BSEN14511 standard rating conditions. 7°C outdoor temp, 35°C outlet water temp. The BSEN14511 testing relates to the heat pump performance only and not the entire heating system.