Mitsubishi Heavy Industries air conditioning
We are a Mitsubishi Heavy Industries Diamond Partner. That means access to the full range, expert support and up to 10 years’ manufacturer warranty on qualifying systems.
Two ways to choose for the home
SRK Standard is a dependable, efficient wall-mounted system at a keen price. SRK Diamond is the premium range, with higher efficiency and extra features. Our price calculator shows both for your room.
Commercial MHI
MHI also makes VRF systems, cassettes and ducted units for commercial buildings. We design and install them from a proper heat load calculation. See commercial air conditioning.
Other brands
Prefer Daikin, Mitsubishi Electric or another brand? We can fit those on request.
Why choose Optimal?
- Our own REFCOM F-Gas registered engineers (REF1023448), no sub-contracting
- Mitsubishi Heavy Industries Diamond Partner, with up to 10 years’ manufacturer warranty on qualifying systems
- Expert design and installation, commissioned and registered
- 4.9 rated from 126 Google reviews
Domestic work across the West Midlands. Commercial projects nationwide. Get a free quote or call 0121 798 1861.
Want a fixed price for your home?
See your price in seconds, or talk it through with an engineer. No obligation.
Diamond Partner
Up to 10 years’ manufacturer warranty
We’re a Mitsubishi Heavy Industries Diamond Partner. That status is only given to installers who meet the manufacturer’s standards for training, installation quality and aftercare, and it unlocks a longer warranty than a standard installer can offer.
- Extended manufacturer warranty of up to 10 years on qualifying systems
- Installed and commissioned to Mitsubishi Heavy Industries’ own specification
- We register your warranty at handover, so you’re covered from day one
- Annual servicing by us keeps the warranty valid and the system efficient
Warranty cover, in years
- Year 1
- Year 2
- Year 3
- Year 4
- Year 5
- Year 6
- Year 7
- Year 8
- Year 9
- Year 10
Subject to registration and annual servicing, on qualifying Mitsubishi Heavy Industries systems.
How it works
From enquiry to handover
- Tell us what you need. Use the calculator or send photos on WhatsApp.
- We confirm the price. A team member checks your photos and talks it through. Site survey if needed.
- Expert design and installation. Our own engineers, to the manufacturer’s specification.
- Commissioned and registered. Warranty registered and aftercare in place.
FAQ
Common questions
What is an MHI Diamond Partner?
It is Mitsubishi Heavy Industries’ top tier of approved installer, giving access to extended warranty terms and manufacturer support.
How long is the warranty?
Up to 10 years on qualifying systems, subject to the manufacturer’s terms and correct registration and servicing.
Is MHI good quality?
Mitsubishi Heavy Industries is a long-established manufacturer known for reliable, efficient air conditioning for homes and commercial buildings.