F-Gas certifiedMitsubishi Heavy Industries Air Conditioning Installers
A separate company from Mitsubishi Electric, MHI builds the SRK Diamond and Avanti ranges — strong value systems with high seasonal efficiency, popular on domestic multi-split installations.
From £1,750
Fully installed, fixed price
5-year warranty
5-year standard parts warranty on registered systems
F-Gas certified
REFCOM registered engineers
- SRK Diamond
- Avanti / Bronte
- Hyper Inverter
- KX6 VRF
Mitsubishi Heavy Industries air conditioning installation, explained
Mitsubishi Heavy Industries air conditioning installation costs from £1,750 fitted for a single-room wall-split, typically completed in one day by F-Gas certified, Mitsubishi Heavy Industries-registered engineers. Registering the system on the manufacturer scheme unlocks a warranty of up to 5 years.
A separate company from Mitsubishi Electric, MHI builds the SRK Diamond and Avanti ranges — strong value systems with high seasonal efficiency, popular on domestic multi-split installations.
Mitsubishi Heavy Industries air conditioning ranges we install
SRK Diamond
Premium domestic wall-split with A+++ cooling efficiency
Avanti / Bronte
Value domestic wall units for bedrooms and studies
Hyper Inverter
Ducted and cassette light-commercial systems
KX6 VRF
Modular commercial VRF for offices and mixed-use buildings
Why choose MHI?
- Very competitive equipment pricing against equivalent A+++ units
- Compact outdoor units for tight side-returns and balconies
- Good multi-split flexibility from a single condenser
Best suited to
- Budget-conscious domestic installs
- Flats with restricted outdoor space
- 2–4 room multi-splits
Mitsubishi Heavy Industries installation cost and what's included
Every Mitsubishi Heavy Industries installation is quoted as a single fixed price after a free survey — no on-site supplements once work starts.
- Heat-load survey and Mitsubishi Heavy Industries unit sizing to CIBSE Guide A
- Supply of the Mitsubishi Heavy Industries indoor and outdoor units
- Refrigerant pipework, trunking or chased runs and making good
- Condensate drainage and pump where required
- Fused spur, isolator and Part P electrical certification
- F-Gas commissioning, Mitsubishi Heavy Industries warranty registration and handover training
Mitsubishi Heavy Industries air conditioning specifications and typical sizing
Indicative sizing for Mitsubishi Heavy Industries domestic wall-split systems. Final capacity is confirmed by a heat-load calculation at survey.
| Capacity | Typical room | Room size | Installed from |
|---|---|---|---|
| 2.0–2.5 kW | Bedroom / home office | up to 20 m² | £1,750 |
| 3.5 kW | Living room / large bedroom | 20–30 m² | £2,149 |
| 5.0 kW | Open-plan kitchen-diner | 30–45 m² | £2,595 |
| Multi-split 2–3 rooms | Whole upstairs / flat | 2–3 zones | £3,490 |
How MHI compares with the other brands we install
| Manufacturer | Origin | Warranty | Installed from |
|---|---|---|---|
| Mitsubishi Heavy Industries | Japan | 5 years | £1,750 |
| Daikin | Japan | 7 years | £1,850 |
| Mitsubishi Electric | Japan | 7 years | £1,950 |
| Toshiba | Japan | 7 years | £1,895 |
| Fujitsu | Japan | 3 years | £1,750 |
Our Mitsubishi Heavy Industries installation process, step by step
1. Free Mitsubishi Heavy Industries survey and heat-load calculation
We measure glazing, orientation and room volume to size the Mitsubishi Heavy Industries unit correctly — oversizing causes short-cycling and poor dehumidification.
2. Fixed-price design and quote
You get unit models, pipe routes, condensate route and outdoor unit position in writing, with VAT included and no hidden extras.
3. First-fix installation
Brackets, refrigerant pipework, drainage and the electrical supply go in with dust sheets down and floor protection throughout.
4. Pressure test, vacuum and charge
Nitrogen strength test, evacuation to below 500 microns and weighed-in R-32 charge — the step most warranty claims hinge on.
5. Commissioning and F-Gas certification
Performance readings, F-Gas record, Part P electrical certificate and Mitsubishi Heavy Industries warranty registration completed the same day.
6. Handover and aftercare
We show you the controls and app, then set an annual service to keep the 5-year Mitsubishi Heavy Industries warranty valid.
Reviewed by our F-Gas team
Written and checked by Air Conditioning Installation's REFCOM-registered installation team, who commission Mitsubishi Heavy Industries equipment week in, week out across London and the South East. Last updated September 2026.
Mitsubishi Heavy Industries air conditioning installation — FAQs
How much does Mitsubishi Heavy Industries air conditioning installation cost?
A single-room Mitsubishi Heavy Industries wall-split system starts at £1,750 fully installed, including the unit, pipework, electrical connection, commissioning and certification. Multi-split systems serving 2–4 rooms typically run £4,500–£8,500, and commercial cassette or ducted systems are priced per zone after a site survey.
Are you Mitsubishi Heavy Industries approved installers?
We are F-Gas certified and REFCOM registered, and we install and register Mitsubishi Heavy Industries equipment as part of the manufacturer's installer scheme. That registration is what unlocks the extended 5-year equipment warranty on your system.
What warranty comes with a Mitsubishi Heavy Industries system?
5-year standard parts warranty on registered systems. On top of that, our own installation carries a 5-year parts and labour warranty. Warranty cover requires correct commissioning and an annual service, both of which we can handle.
Can I get Mitsubishi Heavy Industries air conditioning installed in my home?
Yes. Mitsubishi Heavy Industries domestic wall-split and multi-split systems are suitable for bedrooms, living rooms, home offices and loft conversions. Every installation is quoted fixed, in writing, before work begins.
How long does a Mitsubishi Heavy Industries installation take?
A single Mitsubishi Heavy Industries wall-split is normally completed in one day. Multi-split systems serving several rooms take two to three days, and commercial installations are programmed after the survey — often out of hours to protect trading.
Do you service and repair Mitsubishi Heavy Industries air conditioning?
Yes — we service, regas and repair Mitsubishi Heavy Industries equipment whether or not we installed it, and annual servicing keeps the manufacturer warranty valid.
Compare other brands
Mitsubishi Heavy Industries installation areas we cover
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