Air-to-air is coming into MCS. Be ready the day it opens.
For heat pump and air-conditioning installers. Homeowners in England and Wales can already get £2,500 off an air-to-air heat pump through the Boiler Upgrade Scheme (BUS), but only through an installer certified by the Microgeneration Certification Scheme (MCS). Nobody is certified yet. This is the free hub for the firms that will be first.
- Checklist items
- 23
- Account needed
- None
- Sales calls
- Only if you ask
- When Compare opens
- Claimed profiles invited first
Your readiness
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Just starting
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What MCS has confirmed so far
The standards are written and the scheme is approved. The bottleneck now is certification bodies gaining accreditation, and installers having the right people in place.
- Technical Supervisor
- Must hold Refrigeration, Air Conditioning and Heat Pumps (RACHP) competence at Level 3 or above for every air-to-air installation.
- Standards
- MCS 007 (product), MCS 031b (air-to-air performance estimate) and MIS 3005-D/I (design and installation) now cover air-to-air.
- Installer scheme
- UKAS approved the updated MCS installer scheme with air-to-air in scope in September 2026.
- Certification bodies
- NAPIT and Certsure (NICEIC) have said they intend to apply for UKAS accreditation to certify air-to-air installers.
- Products
- Product certification bodies are adding air-to-air entries to the MCS Product Directory.
Certified installers: 0
Certification bodies are still seeking UKAS accreditation.
Five workstreams between you and your certificate
Work through them in any order. The Technical Supervisor and F-gas items depend on training and assessment dates you do not control, so start there.
| No. | Workstream | What it covers | Items |
|---|---|---|---|
| 1 | Certification route | Choose a certification body, register for air-to-air scope, read the scheme documents and join a consumer code. | 4 |
| 2 | Technical Supervisor | Name a supervisor with RACHP Level 3, hold company F-gas certification and cover flammable refrigerants. | 4 |
| 3 | Products and design | Shortlist listed products, line up supply and learn the MIS 3005-D and MCS 031b design method. | 5 |
| 4 | Boiler Upgrade Scheme quoting | Screen eligibility, show the £2,500 on the quote and fit your process to Ofgem's application deadlines. | 5 |
| 5 | Launch-week go-to-market | Set your service area, install capacity and response times, and plan honest creative and reviews. | 5 |
Opt in to job leads for when you're certified.
Once you're MCS-certified for air-to-air, homeowners on our list in your area who ask to be put in touch are passed to opted-in installers first. We only share a homeowner's details when they ask.