Mitsubishi Ecodan heat pumps
The Ecodan has been in British houses longer than almost anything else, which means the field data behind it is real rather than projected.
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Why people ask for Mitsubishi Electric by name
Mitsubishi Electric has been selling the Ecodan in the UK since 2006, which in heat pump terms is a very long time. The practical consequence is that the failure modes are known, the installer training is mature, and there are engineers in every county who have worked on them for years.
The current R290 units carry a high flow temperature like the Vaillant does, so the same argument applies on older housing stock: the higher the flow temperature the unit will hold, the fewer radiators have to come off the wall. Where the Ecodan tends to win is the controls, which are genuinely good, and the weather compensation, which does more for a running cost than most people realise.
We fit these across the patch and would happily put one in our own houses. Which of the three brands we recommend comes down to your heat loss numbers and what is already on your walls.
- In UK homes since 2006, so the long-term field data is real
- R290 on the current range, carrying a higher flow temperature
- Weather compensation and controls that are worth the money
- MCS listed and eligible for the Boiler Upgrade Scheme grant
We are a Mitsubishi Electric installer
The full Mitsubishi Electric range
We fit the whole Ecodan range, every output and both the monobloc and split arrangements. The bands below are a rough guide only; the size that goes on your house comes out of the heat loss survey.
Roughly how the range maps onto real houses:
Small homes
Flats, bungalows and small well-insulated houses.
- Typical output
- Around 5 kW
- Refrigerant
- R290 on the current range
- Type
- Monobloc
- Controls
- Weather compensation as standard
The typical semi
The most common size we fit on a three or four-bed house.
- Typical output
- Around 8.5 kW
- Refrigerant
- R290
- Type
- Monobloc
- Typical pairing
- 180 to 250 litre unvented cylinder
Larger or older houses
Big or older houses where the heat loss genuinely needs it.
- Typical output
- 11 kW and up
- Refrigerant
- R290
- Type
- Monobloc
- Note
- Beyond this we would price a cascade instead
How Mitsubishi Electric compares
| Mitsubishi Electric | Vaillant aroTHERM plus | Ideal Logic Air | |
|---|---|---|---|
| Refrigerant | R290 | R290 | R32 |
| UK track record | Since 2006 | Long | Long as a boiler maker |
| Controls | The strongest of the three | Good | Straightforward |
| Max flow temperature | High | 75°C | Around 55 to 60°C |
| Price | Higher | Higher | Middle |
| Best for | People who want the controls | Older houses | Newer or upgraded homes |
The honest verdict
Why we fit a lot of them
- The longest real-world track record of any heat pump in British houses
- Weather compensation done properly, which quietly lowers the running cost all winter
- R290 on the current range, so the flow temperature headroom is there
- Engineers who have worked on them for fifteen years are not hard to find
What to weigh up
- Not the cheapest, and the controls you are partly paying for only pay back if they are set up properly
- Propane siting rules apply, as with any R290 unit
- The cylinder question is the same as every heat pump: a combi house needs to find the space
- A big Ecodan on a leaky house is still a big bill; fix the fabric first where you can
Questions we get asked about Mitsubishi Electric
Is the Ecodan a good heat pump?
It is one of the three we recommend, and it has the longest history in UK homes of any of them. The controls and the weather compensation are the part that separates it, and they make a measurable difference to what it costs to run.
Ecodan or Vaillant?
Both are propane units with high flow temperatures, so on the heating side they solve the same problem. The Ecodan has the better controls; the Vaillant tends to be a little simpler to live with. We pick from the survey rather than from a preference.
Does it work with underfloor heating?
Very well, and that is the ideal case for any heat pump. A low flow temperature into a big emitter is exactly what makes the efficiency figures look good.
Does it qualify for the grant?
Yes. It is MCS listed, and we claim the Boiler Upgrade Scheme voucher on your behalf and take it off the price.
How loud is it?
Quiet enough that placement is usually free. We still run the MCS 020 noise calculation at the survey against the 37 dB(A) planning limit at your neighbour's window, and choose the position from that.
Get a price for a Mitsubishi Electric system.
We come and look at the house, tell you whether this is the right unit for it, and put the price in writing. £7,500 or £9,000 off under the Boiler Upgrade Scheme, claimed for you.