Graphic version of this page


About MCS

MCS is a mark of quality and demonstrates
compliance to industry standards that companies
strive to meet. It highlights to consumers that
companies are able to consistently install or
manufacture to the highest quality every time.

As the Domestic Renewable Heat Incentive is now up and running, we asked Ofgem, administrators of the scheme, to offer some key tips and advice.

As the Domestic Renewable Heat Incentive is now up and running, we asked Ofgem, administrators of the scheme, to offer some key tips and advice.


Top tips for complying with the Domestic RHI

  • Have a look at the Installers and Industry section on Ofgem’s website.
  • Read their Essential guide for installers.
  • If you install meters, read the Essential guide to metering.
  • Promote your MCS accreditation only for the technology that you actually hold the accreditation for.
  • If you haven’t done so recently, familiarise yourself with your responsibilities under the RECC code to make sure you are compliant.
  • Click here and sign up to the Domestic RHI e-newsletter to keep up to date with developments in the scheme.


How to help your customer successfully apply to the Domestic RHI

Please note that that this article addresses some common questions. To get a complete understanding of your role in relation to the Domestic RHI you will need to read the Essential Guides.

How important is the information on the MCS certificate?

Ofgem can only process your customer’s Domestic RHI application if the information on the MID (MCS Installation Database) is correct. If, for example, the customer doesn’t need to be metered but the MID says that they do, you will need to amend this before they are able to apply to Ofgem for the Domestic RHI, or their application will be rejected. Therefore please make sure that you provide us with the correct information about your customer’s installation so that Ofgem can process their application as smoothly as possible.

My customer wants to have multiple heating systems, can they apply?

There are a number of circumstances under which you may be able to install multiple products, and apply for these in one DRHI application. These scenarios have been outlined in the ‘Multiple products’ section of Ofgem’s Reference Document.The customer will not be able to make separate applications for two products at the same property, unless one of the products is a solar thermal system. However they may be allowed to make a single application for multiple products if they are the same technology and have been commissioned at the same time.

What is the BSL?

DECC have announced biomass sustainability rules which will be brought in from autumn 2014. These rules mean that scheme participants with a biomass system will need to use fuel from an approved supplier. The Biomass Suppliers List (BSL) is up and running for suppliers so they are advised to follow this link and get themselves registered on the list as soon as possible. Consumers are also recommended to source their fuel from suppliers on this list as early as possible to not to stockpile ineligible fuel.

When are Green Deals needed?

It is a Domestic RHI rule that all applicants have a Green Deal Assessment carried out on their property. If they’ve already got one then they don’t need another, provided that they can supply their Green Deal Advice Report Number. The only people exempt from this are those who build their own homes incorporating an eligible heating system. This is because these houses would be built to recent building regulation standards.  For more information on self-builds see here on Ofgem’s website.

How should biomass systems be sized?

Under the Domestic RHI scheme, all new (i.e. not legacy) biomass boilers or stoves must be installed with sufficient capacity to meet the entire space heating demand at the property. If the installation cannot meet 100% of the space heating requirement then the system will need to be metered.

Can I retrospectively certify an installation?

You may be asked by your customers to retrospectively certify an installation in order for them to be eligible to the Domestic RHI. You are not able to do so for an installation that you didn’t do yourself or was not carried out under the MCS scheme. Customers who’s installation was done by an MCS installer who has since ceased trading, will have to call the MCS helpline to do this.


Metering and the Domestic RHI

  • If you are an MCS certified installer who is responsible for installing meters, your customer will be expecting your help in a number of areas, for example see here. It is important that you know what this will involve so you are strongly recommended to read Ofgem’s Essential Guides which we have signposted you to in the top tips section above. The Essential Guide to Metering has a section for installers and it is important to input the correct information on the MCS certificate so that customer applications to Ofgem display correctly whether the customer needs to be metered or not.  
  • One key role for you will be to fill out the Installer metering questions. There are versions for biomass and heat pumps. Give it to your customer and also the alternative metering arrangements template if required. These are also available in biomass and heat pump versions.
  • As per the MCS Domestic RHI Metering Guidance, all installations must be meter ready. Make sure that you read this guidance as it explains the requirement in detail. For example, these include the space required and defined locations for appropriate meters to be fitted.
  • Ofgem are currently working with industry and awarding organisations to produce a training course on installing meters. This training will not only help you in learning how to adhere to the Domestic RHI requirements and provide the best service to your customers, but it will also enable you to gain Qualifications and Credit Framework (QCF) qualification and credits. Ofgem are hoping that this training will be available from July so keep an eye open for future updates.