Guide · Buying
MCS certification explained
What the badge actually guarantees — and what it does not.
MCS (Microgeneration Certification Scheme) certifies both heat pump products and the companies that install them, and an MCS-certified installer is required to claim the £7,500 Boiler Upgrade Scheme grant (GOV.UK, 2026). Certification covers design standards, commissioning and handover documentation, and every compliant install is issued an MCS certificate registered against the property.
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What MCS covers
- A room-by-room heat loss calculation to the relevant standard.
- A performance estimate showing expected annual heat output and efficiency.
- Noise assessment under MCS 020 for the outdoor unit position.
- Commissioning records and a customer handover pack.
- A registered MCS certificate, needed for grant claims and often for resale.
What MCS does not guarantee
Certification is a scheme-level check, not a guarantee that every job is perfect. It does not fix pricing, does not rate customer service, and does not mean the design is optimal for your home. Treat it as a floor, not a ranking.
How to verify an installer
- Search the company on the MCS certified installer register.
- Check the certification covers heat pumps specifically, not just solar.
- Ask for the MCS certificate number of a recent nearby install.
- Confirm who holds the workmanship warranty and for how long.
Frequently asked questions
- Do I need an MCS installer for the heat pump grant?
- Yes. The Boiler Upgrade Scheme grant can only be claimed by an MCS-certified installer.
- Is MCS a guarantee of quality?
- It sets minimum design and documentation standards, but it is not a quality ranking — compare quotes and references as well.
- What documents should I receive after installation?
- An MCS certificate, heat loss calculation, performance estimate, commissioning sheet, warranty details and user handover pack.
- MCS Certified — Installer certification scheme required for grant eligibility.
- Boiler Upgrade Scheme — GOV.UK — Official guidance on the £7,500 BUS grant in England and Wales.
- Energy Saving Trust — Heat pump efficiency, running cost and SCOP benchmarks (UK).
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