Installers and industry

Mae’r dudalen yma ar gael yn Gymraeg.

The Government introduced new regulations on 20 September 2017. For information on what the Government changes mean for you, please see our changes to the scheme webpage.

Changes to MCS installation standards for heat pumps

Effective from 31 July 2017, the Department for Business, Energy & Industrial Strategy (BEIS) introduced a change to the Domestic RHI Regulations to reflect the latest version of the Microgeneration Certification Scheme (MCS) installation standard for heat pumps.

Version 5.0 of MIS 3005 of the MCS standards was introduced by MCS on 28 April 2017; taking effect from 17 May 2017. From 30 October 2017 onwards, heat pumps must be installed in accordance with this version of the MCS standards.

Please see our changes to the scheme webpage for more information.

Please ensure you are up to date on the latest standards.

Installer eligibility criteria in the Domestic RHI

Your installation company must be a Microgeneration Certification Scheme (MCS)open key term pop-up  member. When dealing with domestic customers, you must comply with the or the Home Insulation and Energy Systems Scheme (HIES) code of practice.

It's acceptable for the heating system installed for your customer to be a first installation for which you're accredited under MCS, as long as you can issue an MCS certificate for it.

Getting to grips with the scheme

You can find everything you need to know in the Essential Guide for Installers  but it’s also worth you reading the Essential Guide for Applicants too. If you’ve read these and you’re still a little unsure about something, do get in touch.

You may want to help your customers through the process, providing them with the relevant information and evidence. Unlike the Non-domestic RHI, we ask that the customer submits the application, not the installer.

They’ll need to give personal information, including the bank account into which we make payments and also an email address through which we can contact them directly. It’s important that we get this email address correct as we use it to send out reminders for customers to sign their annual declarations and to get in touch if there’s any issue with their account.

Evidence requirements

Your customers will need the following documentation. The more information you can give them upfront, the smoother the application process will be.

  • an MCS certificate (within 10 working days of the commissioning date)
  • an MCS compliance certificate (and where the MCS installation number is on it)
  • an EPC that is less than 24 months’ old
  • an itemised invoice showing parts and labour
  • the completed Installer Metering Questions document for biomass or for heat pumps (only if the  heating system need to be metered). There's also an Alternative Metering Arrangements document for biomass or for heat pumps, if required.
  • advice on the heating system’s maintenance, servicing and efficient use. This is because your customer must keep the heating system in good working order throughout their seven years on the scheme. You should also explain what actions might invalidate the warranty
  • Advice on how to use and read meters (if they need them).

 Some applicants need to provide additional evidence:

Registered social landlords making their first application need to provide:

  • their organisation’s registration number
  • the registered name and address
  • a letter of authorisation for their authorised representative.

Where the property has to be metered, your customer will need to provide additional information about their metering arrangements which they get in documents from you. See Installers and metering.

Other evidence

There are some cases where your customers will come into review with us and will have to provide additional evidence. For an example of why this might happen, and what evidence we’ll require, have a look at our ‘I’m in review’ Helpsheet.

In some cases your customer’s application is with our compliance team, who are asking for additional evidence of compliance with the scheme rules. As part of these checks we may review a large number of applications from a single source. For example immediately before a biomass degression we may review all applications by the customers of a number of biomass installers.    

Next steps

To find out more, see:

Microgeneration Certification Scheme (MCS)

All renewable heating systems in the Domestic RHI must be certified by MCS. This is an internationally recognised quality assurance scheme supported by government. You’ll need an MCS certificate number to support your application. More.

Publications and updates

  • Published: 11th Oct 2017
  • Guidance
  • 1 Associated documents
If you're applying to the Domestic RHI, read about the joining requirements, the application process and the rules you must stick to once you're on the scheme.

  • Published: 20th Sep 2017
  • Guidance
  • 1 Associated documents
This guide is for installers and others working in the renewable heating industry.

  • Published: 1st Sep 2017
  • Guidance
  • 1 Associated documents
Installers must complete installer metering questions for people who have heat pumps for the Domestic RHI.

  • Published: 23rd Aug 2017
  • Guidance
  • 1 Associated documents
Installers must complete an alternative metering arrangement form for Domestic RHI applicants with biomass.

  • Published: 23rd Aug 2017
  • Guidance
  • 1 Associated documents
Installers must fill out an alternative metering arrangement template for Domestic RHI applicants with heat pumps.

  • Published: 23rd Aug 2017
  • Guidance
  • 1 Associated documents
Installers must complete Installer Metering Questions for people with a biomass heating system in the Domestic RHI

  • Published: 7th Apr 2016
  • Guidance
  • 1 Associated documents
This document contains answers to FAQs for installers and others working in the renewable heating industry.

  • Published: 24th Mar 2016
  • Guidance
  • 1 Associated documents
This guide starts with the circumstances which make metering compulsory for some people applying for the Domestic RHI, all the way through to submitting meter readings for payments.

  • Published: 24th Mar 2016
  • Guidance
  • 1 Associated documents
This document explains the Ecodesign of Energy-related Products Directive (ErP) and The Energy Labelling Directive, and their impact on the Domestic RHI.

  • Published: 9th Sep 2015
  • Guidance
  • 0 Associated documents
Read our clarification note on the eligibility of Ground Source Heat Pumps and shared ground loop arrays.

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