Supporting you with the Green Homes Grant: RHI, MSC & TrustMark

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What is the Renewable Heat Incentive (RHI)?

The RHI is a government scheme developed to promote the use of renewable heating system technology, to help reduce carbon emissions and meet the UK’s target of reaching net zero emissions by 2050.

How can your customers benefit?

  • Qualifying for the scheme means homeowners can receive quarterly payment contributions over a seven-year period.
  • Homeowners can also benefit from fuel savings, courtesy of highly efficient renewable heating systems such as Vaillant’s heat pump range.
  • Unlike the GHG the payment is not made upfront, meaning your customer must have the upfront funds in order to be able to participate.
  • The GHG can be combined with a reduced RHI payment, the amount of the grant is then taken off the value of the projected RHI payments.

What are the installer requirements?

  • The installation must be completed by an MCS accredited installer.

What is the closing date for the scheme?

  • The RHI will close to new applications in March 2022.

Trustmark explained

The primary aim of TrustMark is to maintain standards across all sectors of home improvements and ensure high levels of consumer protection are maintained.

Only TrustMark registered businesses can carry out work for the Green Homes Grant. This is to provide quality assurance to householders that the work will be completed to acceptable standards.

If you are not already MCS accredited, we would recommend you become an MCS installer before applying for Trustmark if you wish to be able to install under the Green Homes Grant.

If you are already an MCS installer you will need to use a scheme provider to apply for TrustMark. Details of participating Scheme Providers for all trades are available to choose from as part of the registration process. The scheme provider will complete pre-entry checks on each business applying for registration, ensuring receipt of all information and supporting evidence required.

Application assessment includes an adequate sample of work (inclusive of pre, mid and post site inspection) to enable demonstration of compliance with industry codes of practice.

To find out more about TrustMark visit:

MCS explained

MCS is an industry-led quality assurance scheme, which defines standards to design heat pump installations in the UK and demonstrates the quality and reliability of approved products and installation companies.

Being MCS certified demonstrates to your customers that you install to the industry-expected level of quality every time. MCS gives you a mark of quality which provides assurance.

There are four key elements to MCS:

  • A commitment to quality workmanship
  • A commitment to customer care
  • A demonstration of competency
  • Committing to continual improvement through the deployment of an effective management system

To find out more about MCS and apply, please visit

Once you have become MCS accredited your business will be required to apply for a consumer code of conduct for example, RECC and HIES.

Not yet MCS accredited? Speak to your Regional Business Manager to see how we can help you

Becoming a Green Homes Grant installer

Find out more about our training courses

Find out how Vaillant can help you support your customers.

Go back to find out more about the Green Homes Grant.