Search for Mitsubishi vs Daikin and you're usually comparing three companies, not two. Mitsubishi Electric and Mitsubishi Heavy Industries both sell air conditioning under the Mitsubishi name, but they are separate businesses with different ranges, apps and spare parts.
None of the three is a budget version of another. This guide sets out what each is known for, compares them side by side using the manufacturers' own 2026 UK figures, and shows how to choose for each room.
Daikin
Heating and cooling is Daikin's core business, and its domestic range covers most rooms and wall types, from design-led wall units to concealed ducted systems.
- Quiet: the Emura, Stylish, Comfora and Perfera run from 19 dB(A).
- Efficient: A+++ seasonal efficiency on its top ranges.
- Cleaner air: Flash Streamer purification.
- Controls: the Onecta app, with Alexa and Google and no subscription.
The Daikin range
- Emura: an award-winning curved design with 64-grid thermal sensing, for design-led living rooms.
- Stylish: 189 mm deep, for tight walls and minimal interiors.
- Perfera: Heat Boost for 14% faster warm-up, and A+++.
- Comfora and Sensira: compact A++ units from 20 dB(A), for bedrooms and upgrades.
- Concealed ducted: only the vents are on show.
Choose Daikin if you plan to keep the system for fifteen years and value quick access to UK spares. Daikin UK publishes full product data for its domestic range.
Mitsubishi Electric
Mitsubishi Electric is a Japanese electrical and electronics maker. In home air conditioning it is known for very quiet indoor units and design-led finishes.
- The quietest unit in this guide: the MSZ-AY runs at 18 dB(A) on its lowest fan speed. The MSZ-LN and MSZ-EF run from 19 dB(A).
- Efficient: the flagship MSZ-LN is A+++ for cooling at 2.5 and 3.5 kW, with a SEER of up to 10.5.
- Cleaner air: Plasma Quad air purification is built into the MSZ-LN.
- Controls: built-in Wi-Fi and the MELCloud Home app on the MSZ-LN, AY and EF, with Alexa and Google Assistant.
The Mitsubishi Electric range
- MSZ-LN: four colours (Ruby Red, Onyx Black, Pearl White and Natural White) and a 3D i-see sensor that finds the people in the room.
- MSZ-RZ: R290 refrigerant with a built-in leak sensor.
- MSZ-AY and AP: from 18 dB(A), with self-cleaning and a matt finish on the AY.
- MSZ-EF (Zen): slim at 195 mm deep, in black, silver or white.
- MSZ-HR (Classic): simple and proven, with Wi-Fi as an option.
Choose Mitsubishi Electric if quiet matters most, especially in a bedroom, or the unit needs to suit the room. Mitsubishi Electric publishes full product data for its domestic range.
Mitsubishi Heavy Industries
Mitsubishi Heavy Industries (MHI) is a Japanese heavy engineering group. Its air conditioners are made by its subsidiary, Mitsubishi Heavy Industries Thermal Systems, and are known for strong efficiency across the whole year.
- Efficient both ways: the flagship SRK-ZSX reaches SEER 10.3 and SCOP 5.2, A+++ for cooling and heating on the 2.0 to 3.5 kW sizes.
- Ready for winter: the SRK-ZSX keeps heating down to −20°C outside.
- Quiet: from 19 dB(A).
- Cleaner air: an Allergen Clear enzyme filter, plus a washable deodorising filter.
- Controls: the Smart M-Air app, with Wi-Fi built in on most of the range and Alexa and Google Assistant support.
The MHI range
- SRK-ZSX: the flagship, A+++ for heating and cooling at 2.0 to 3.5 kW, with 3D AUTO airflow and a motion sensor.
- SRK-ZT: a black wall unit, new for 2026.
- Also in the UK range: the SRK-ZS, SRK-ZTL and SRK-ZSP.
Choose MHI if you'll use the system for heating as much as cooling.
Side-by-side comparison
- Daikin
- Outright performance, year after year
- Mitsubishi Electric
- Very quiet units and designer finishes
- Mitsubishi Heavy Industries
- Efficiency right through the year
- Daikin
- A+++ on its top ranges
- Mitsubishi Electric
- A+++ on the MSZ-LN, SEER up to 10.5
- Mitsubishi Heavy Industries
- A+++ heating and cooling on the SRK-ZSX, SEER up to 10.3
- Daikin
- From 19 dB(A)
- Mitsubishi Electric
- From 18 dB(A), the quietest here
- Mitsubishi Heavy Industries
- From 19 dB(A)
- Daikin
- Flash Streamer purification
- Mitsubishi Electric
- Plasma Quad, built into the MSZ-LN
- Mitsubishi Heavy Industries
- Allergen Clear enzyme filter
- Daikin
- Onecta, plus Alexa and Google
- Mitsubishi Electric
- MELCloud Home, plus Alexa and Google
- Mitsubishi Heavy Industries
- Smart M-Air, plus Alexa and Google
- Daikin
- Senses where you are and aims the air away
- Mitsubishi Electric
- 3D i-see sensor finds the people in the room
- Mitsubishi Heavy Industries
- 3D AUTO airflow and a motion sensor
- Daikin
- Understated and beautifully built
- Mitsubishi Electric
- Four MSZ-LN colours, including Ruby Red
- Mitsubishi Heavy Industries
- Clean white, plus the black SRK-ZT, new for 2026
- Daikin
- Deep UK spares network
- Mitsubishi Electric
- Warranty up to 5, 7 or 10 years, depending on installer accreditation
- Mitsubishi Heavy Industries
- 5 years on parts, up to 10 through MHI's installer scheme
- Daikin
- You want a proven system for fifteen years
- Mitsubishi Electric
- Quiet matters most, or the unit should match the room
- Mitsubishi Heavy Industries
- You'll use it for heating as much as cooling
| Factor | Daikin | Mitsubishi Electric | Mitsubishi Heavy Industries |
|---|---|---|---|
| Known for | Outright performance, year after year | Very quiet units and designer finishes | Efficiency right through the year |
| Efficiency | A+++ on its top ranges | A+++ on the MSZ-LN, SEER up to 10.5 | A+++ heating and cooling on the SRK-ZSX, SEER up to 10.3 |
| How quiet | From 19 dB(A) | From 18 dB(A), the quietest here | From 19 dB(A) |
| Cleaner air | Flash Streamer purification | Plasma Quad, built into the MSZ-LN | Allergen Clear enzyme filter |
| App control | Onecta, plus Alexa and Google | MELCloud Home, plus Alexa and Google | Smart M-Air, plus Alexa and Google |
| Clever bit | Senses where you are and aims the air away | 3D i-see sensor finds the people in the room | 3D AUTO airflow and a motion sensor |
| How it looks | Understated and beautifully built | Four MSZ-LN colours, including Ruby Red | Clean white, plus the black SRK-ZT, new for 2026 |
| Peace of mind | Deep UK spares network | Warranty up to 5, 7 or 10 years, depending on installer accreditation | 5 years on parts, up to 10 through MHI's installer scheme |
| Pick it if | You want a proven system for fifteen years | Quiet matters most, or the unit should match the room | You'll use it for heating as much as cooling |
The pattern to notice: all three are strong on efficiency and all three are quiet. The real differences are finish, features, how each performs as a heater and how the warranty works, and those only matter if they matter for your room.
Mitsubishi Electric is not Mitsubishi Heavy Industries
This catches a lot of people out. Mitsubishi Electric and Mitsubishi Heavy Industries are two separate companies that both sell air conditioning under the Mitsubishi name. Neither is a budget version of the other, but their ranges, controls and spare parts are different, which is why it matters which one you have.
- What the company is
- A Japanese electrical and electronics maker, founded in 1921 from the electrical works at Mitsubishi's Kobe shipyard.
- Known for in air conditioning
- Very quiet wall units, from 18 dB(A), and design-led finishes such as the four-colour MSZ-LN.
- Model codes
- Indoor units start MSZ-, outdoor units MUZ-
- App
- MELCloud Home
- What the company is
- A Japanese heavy engineering group that grew out of Mitsubishi's Nagasaki shipyard. Its air conditioners come from its subsidiary, Mitsubishi Heavy Industries Thermal Systems.
- Known for in air conditioning
- Efficient all-rounders: the flagship SRK-ZSX is A+++ for heating and cooling and heats down to −20°C.
- Model codes
- Indoor units start SRK-, outdoor units SRC-
- App
- Smart M-Air
Shared roots
Both names go back to the Mitsubishi business founded by Yataro Iwasaki. In 1884 it leased the Nagasaki shipyard, the start of Mitsubishi Heavy Industries, and Mitsubishi Electric grew out of the electrical works at its Kobe shipyard, becoming a company in its own right in 1921. The Mitsubishi head office was disbanded in 1946. Today they are independent companies that share a name, a history and the three-diamond mark, but they design, sell and guarantee their air conditioners separately.
How to tell which one you have
- Read the name. The full name is on the unit: Mitsubishi Electric or Mitsubishi Heavy Industries. The three diamonds alone won't tell you.
- Check the model code on the indoor unit's rating label. MSZ- means Mitsubishi Electric; SRK- means MHI.
- Look at the app. Mitsubishi Electric uses MELCloud Home and MHI uses Smart M-Air. Apps and controllers don't cross over.
Parts, controllers and warranties are handled by each company separately, and the two can't be mixed on one multi-split system. If you're adding a room or booking a repair, tell us which one you have, or send us a photo of the label and we'll tell you.
Want a straight recommendation for your rooms? The survey is free, and we aren't tied to any brand.
Get a brand recommendationWhich should you choose? Room by room
- Bedrooms: noise matters most at night. Mitsubishi Electric's MSZ-AY has the lowest figure here at 18 dB(A), and Daikin and MHI both have units from 19 dB(A), which is still effectively silent.
- Living rooms and open-plan spaces: any of the three. Get the capacity right for the room, because an undersized unit will never cope with a south-facing kitchen-diner in July.
- Heating as much as cooling: MHI's SRK-ZSX is A+++ for heating as well as cooling and heats down to −20°C. Mitsubishi Electric's MSZ-LN matches its SCOP of 5.2 at 2.5 kW, so compare the heating figures on the exact models.
- When the look matters: the MSZ-LN comes in four colours, Daikin's Emura has its signature curve, and MHI's SRK-ZT is black.
- Several rooms on one system: all three do multi-split, but every indoor unit must come from the same manufacturer as the outdoor unit, so choose on the indoor styles you want.
- Already have one of the three: stick with it. The controls stay consistent, and you avoid having two brands to learn and maintain.
- Whole-home heating: you're comparing heat pumps such as Daikin Altherma and Mitsubishi Electric Ecodan, and the heat pump cost and grants guide is the place to start.
What matters more than the brand
Most problems we're called out to fix have nothing to do with the badge on the unit. Three things decide how well a system performs over its life:
- Sizing. The capacity should come from a heat load calculation for the room, not a guess. An undersized unit runs flat out and never keeps up. An oversized one cycles on and off, wastes energy and wears faster.
- Installation quality. Refrigerant pipework needs to be pressure-tested and vacuumed before the system is charged, and only an F-Gas certified engineer can legally do that work. Shortcuts here cause the leaks and breakdowns we see years later.
- Servicing. An annual service keeps efficiency where it should be, and warranty terms generally depend on it.
Get those three right and any of these brands will give you a quiet, efficient system for well over a decade. Our installation cost guide shows what a properly specified system costs in London.
Questions
Frequently asked questions
Is Daikin or Mitsubishi better?
There are two Mitsubishis, and none of the three brands is better across the board. Mitsubishi Electric is known for very quiet units and design-led finishes, Mitsubishi Heavy Industries for strong efficiency in heating as well as cooling, and Daikin for outright performance and a deep UK spares network. All three make excellent equipment that will serve a UK home for well over a decade if it's installed and serviced properly, so the right model for the room matters more than the brand.
Which is quietest: Daikin, Mitsubishi Electric or Mitsubishi Heavy Industries?
On the manufacturers' published figures, Mitsubishi Electric's MSZ-AY is the quietest at 18 dB(A) on its lowest fan speed. The quietest Daikin and MHI wall units run from 19 dB(A). Anything around 20 dB(A) or below is effectively inaudible at night, so compare the figure for the exact models you're quoted rather than the brand.
Is Mitsubishi Heavy Industries the same as Mitsubishi Electric?
No. They are separate companies that share the Mitsubishi name, history and three-diamond logo. Mitsubishi Electric is an electrical and electronics maker. Mitsubishi Heavy Industries is a heavy engineering group whose air conditioners are made by its subsidiary, Mitsubishi Heavy Industries Thermal Systems. Their ranges, apps and spare parts are all different. Mitsubishi Electric indoor units have model codes starting MSZ-, and MHI's start SRK-.
Is Mitsubishi Heavy Industries better than Daikin?
Neither is better overall. MHI's flagship SRK-ZSX is A+++ for both heating and cooling on its 2.0 to 3.5 kW sizes and keeps heating down to −20°C outside, which suits homes that rely on it through the winter. Daikin's strengths are quiet, design-led units such as the Emura and a deep UK spares network. Choose on the room and on how you'll use the system.
Which brand is most reliable?
All three have excellent reliability records. In practice the failures we're called out to repair come from installation and maintenance, not the badge on the unit: pipework that wasn't pressure-tested, a system that was never properly vacuumed, or years without a service. A well-installed unit from any of the three, serviced annually, is a very safe choice.
Which is cheapest to install?
For equivalent units, installed prices are usually close, and the gap depends on the model more than the brand. Each brand has everyday ranges and design-led ones, and the design-led units cost noticeably more. Pipe run, condenser access and electrical work move the total far more than the choice of brand does.
Can I mix brands in one house?
Yes, as separate systems. A Daikin in one room and a Mitsubishi Electric in another, each with its own outdoor unit, is fine. You can't mix brands on one multi-split, though: every indoor unit must be a compatible model from the same manufacturer as the outdoor unit, and that includes the two Mitsubishis. If you already have one brand and plan to add rooms, staying with it keeps the controls consistent.
Which brands do you install?
We install Daikin, Mitsubishi Electric, Panasonic, LG and Samsung, and we aren't tied to any one manufacturer. We recommend whichever unit suits the room, the noise requirement and the budget, and the survey is where that gets decided.