Launched in 2025, MCS is an approved certification scheme for the Clean Heat Market Mechanism (CHMM).
The Clean Heat Market Mechanism launched on Tuesday 1 April. It is designed to drive the adoption of heat pumps by requiring boiler manufacturers to increase their share of heat pump sales. Under the scheme, manufacturers that sell more than 19,999 gas boilers to the UK market (or 999 oil boilers) must ensure that at least 6% of their total UK sales come from heat pumps in 2025/26.
All heat pump installations under the scheme must be registered on the MCS Installation Database (MID). This is to provide assurance that the installations are genuine and to mitigate the risk of them being counted multiple times
The requirement for heat pumps to be registered on the MID also means that installations are MCS certified. It means they are being installed to industry-recognised standards, by MCS certified installers who are using certified products. This is crucial for continuing to give everyone confidence in home-grown energy.
As an installer, your role in creating MCS certificates and building an accurate record in the MCS Installation Database (MID) is a critical part of certifying an installation and helping to raise standards across the sector. As the transition to net zero accelerates, this data also helps to drive industry progress, informs government and policy development, strengthens consumer confidence, and can unlock future opportunities for certified installers.
As all heat pumps under the Clean Heat Market Mechanism must be registered on the MID, installers have an important role to play when creating a heat pump certificate. To support installers in ensuring the data they enter is accurate, we’ve created a step-by-step guide to creating heat pump certificates. This provides details on what information installers need to enter during each step of the heat pump certificate journey. View the guide below.
