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Quiet operation

Ecodan is one the quietest heat pumps on the market.

Smartphone control

A smartphone app puts you in total control of your space heating and water heating, whether you’re reclining in an armchair, at work, or on the way to the airport.


Ecodan provides reliable and renewable space heating and hot water all year round and helps you to do your bit in the fight against climate change.


Air to water heat pumps use electrical energy and take low grade heat energy from the outdoor air, to heat refrigerant which in turn heats water for domestic use and space heating. 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.

The operation of a heat pump is similar to a refrigerator – but in reverse. This process is known as the vapour compression cycle and the following is a more detailed explanation.

At the beginning of the first phase the refrigerant is a cold low pressure liquid.


  1. The refrigerant passes into the evaporator and heat energy from the outside air passes over the evaporator causing the refrigerant to increase in pressure and change to a warm vapour.

  2. This warm vapour then enters the compressor where its temperature increases as a result of the compression process and turns into a hot gas.

  3. The hot refrigerant gas is then condensed as it passes across one side of a plate heat exchanger. The heat is transferred to the cooler side (water side) of the heat exchanger, and this is transferred via the primary water circuit to heat up the water tank inside the property. As the temperature of the refrigerant decreases the state changes from a gas back to a cool vapour.

  4. Despite dropping in temperature, the cool vapour still has a high pressure and to reduce this pressure the vapour passes through an expansion valve. This causes the pressure to drop and the temperature lowers, returning the refrigerant to its initial state of cool low pressure liquid.


This process is repeated

It is only the refrigerant that passes through this cycle; the water is heated as it travels through the plate heat exchanger. The heat energy from the refrigerant passes through the plate heat  exchanger to the cooler water which increases in temperature. This heated water enters the home heating circuit and can also be used to provide domestic hot water via a hot water cylinder.

How Heat
Pumps Work

ErP A++ Energy Label
Our entire Ecodan heat pump range has been rated at A++

MELCloud Wi-Fi Control
MELCloud is a major investment from Mitsubishi Electric to allow us to offer fast and easy mobile control and monitoring of the Mitsubishi Electric Ecodan system from anywhere in the world

SD Card Commissioning and Logging
All settings can be pre-loaded on to the SD card and then simply inserted on site during commissioning.  The SD card then logs performance data to help with fault finding

Energy Monitoring
Energy monitoring comes as standard on all Ecodan FTC5 models.

Hybrid Control
This enables Ecodan to work seamlessly alongside existing heating systems to help reduce initial investment and deliver run cost savings

Quiet Mark
A unique accolade from the Noise Abatement Society given to technologies with best in class noise levels

Engineers on the phone and on- site helping you to design systems, fault find and service  systems

Ecodan FTC6 Cylinder Range
Improved cylinder performance and faster heat up times through the use of plate heat exchanger technology.

There are so many choices for consumers and installers when investing in a new heating system and Mitsubishi Electric aims to provide complete support and service from start to finish.

Simply put: Not all air to water heat pumps are the same

What makes
Mitsubishi unique:


1. What is a heat pump?

You have already been using a heat pump for decades without realising it.

Your refrigerator using the same basic heat pump technology to remove the heat from the food inside the ‘box’, ejecting it to the outside and keeping the food cold.

A heat pump reverses this process and extracts heat energy from the outside air, ground or water and moves that heat into your home (hence ground source or air source heat pumps).

Using the same ‘vapour compression cycle’ as your fridge to produce heat, the heat pump can take a few degrees of outside heat and upgrade it to provide all the heating and hot water you need.

2. What is an air source heat pump?

An air source heat pump, such as the market-leading Ecodan range, is essentially a ‘box’ that sits outside your home and uses a fan to draw air through the refrigerant piping, where the heat energy is harvested and upgraded.

The heat pump runs on electricity and will ‘convert’ each kilowatt of electrical energy into 2, 3, 4 or more kilowatts of heat energy. This ‘free’ energy taken from the air is replaced each day by the sun and is therefore renewable energy.

3. How much will Ecodan cost to install?

There are a number of factors affecting the cost of installation such as the age and size of your property, the levels of insulation and thermal efficiency, the number of rooms and radiators, etc, so it is difficult to give even an average idea of cost.  On Average between 6-12k depending on the above.


4. How much will I save on running costs?

This depends on what system of heating you currently use but even with a gas boiler, you are likely to make significant savings.  For oil, LPG or direct electric heating the savings could be even greater.

5. How long will it take to install?

Again, there are a number of factors that will affect this but for a new-build home, the Ecodan air source heat pump can be installed in a couple of days.

For a refurbishment, it depends whether your radiators also need replacing, whether your water cylinder needs re-siting, where the outside box will be fitted, etc.

It will also depend on whether you are completely replacing the existing heating system or simply adding an Ecodan to work alongside the current heating in a hybrid solution – which more people are doing now. This provides a fairly straightforward way of adding renewable heating whilst minimising the work needed.

6. What about when it’s freezing outside?

Ecodan has been manufactured in the UK for more than a decade now and we have invested heavily in R&D to make sure that it is designed specifically for UK & Ireland conditions.

The system will continue working to maximum efficiency down to -10C and will carry on working to -20C or more, so you can rely on a warm and cosy home even when there is snow on the ground.

7. Are they noisy?

The outdoor part of the system does have a fan which draws the air across the internal components and this will make a whirring noise in operation.  The amount of noise depends on the quality of the product and this is where the Ecodan range has led the market in the UK & Ireland.

Ecodan has always been amongst the quietest heat pumps available and our latest model is ‘Ultra Quiet’, running at a noise level almost equivalent to the noise in a typical library.

This increases the choice in where the outdoor unit can be sited, making it even more flexible in terms of installation.


8. What about linking them to smart controls?


Ecodan already comes with sophisticated smart controls that allow you to monitor and control your heating from anywhere. Our MELCLoud app is part of the package and allows you to see and change settings from your sofa, your office, or the poolside.

In addition to this, you are able to see how much energy you are using, allowing you to spot trends and vary your heating to match your needs with maximum efficiency and minimum cost.

These advanced controls also mean that both we and your installers can access your system remotely to check your system is running as efficiently as possible and troubleshooting if ever necessary.

Frequently Asked Questions

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