Approved standards, calculators, codes of practice for the Renewable Heat Incentive
Updated 29 September 2026
Applies to England, Scotland and Wales
© Crown copyright 2026
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This publication is available at https://www.gov.uk/government/publications/domestic-and-non-domestic-renewable-heat-incentive-regulations-approved-standards/approved-standards-calculators-codes-of-practice-for-the-renewable-heat-incentive
The versions or issues of the codes of practice, standards and calculators listed in these tables are the versions approved for use in:
- The Domestic Renewable Heat Incentive Regulations 2014
- The Non-Domestic Renewable Heat Incentive Regulations 2018
It also confirms any subsequent versions or issues of these codes of practice, standards and calculators that have been approved by the Secretary of State for use in both Renewable Heat Incentive Schemes as set out in:
- Regulation 2B of The Domestic Renewable Heat Incentive Regulations 2014
- Regulations 18 and 47A of The Non-Domestic Renewable Heat Incentive Regulations 2018
Individual standards calculators and codes of practice are available to download here:
- MCS Standards and Tools Library
- Renewable Energy Consumer Code’s code of practice
- Home Insulation and Energy Systems Quality Assured Contractors Scheme’s code of practice
| Regulation | Domestic Renewable Heat Incentive Regulations 2014: approved standards, calculators, Codes of Practice | Date standard approved |
|---|---|---|
| 2B(1) | Version 4.3 of the document entitled ‘Microgeneration Installation Standard: MIS 3004 The Biomass Installation Standard’ published 5 December 2025. | 22 September 2026 |
| 2B(1) | Version 3.0, Microgeneration Installation Standard: MIS 3005-D The Heat Pump Standard (Design), published 5 December 2025 | 22 September 2026 |
| 2B(1) | Version 1.0, Microgeneration Installation Standard: MIS 3005-I The Heat Pump Standard (Installation), published 1 December 2021 | 1 April 2022 |
| 2B(1) | Version 5.1, Microgeneration Installation Standard: MIS 3001 The Solar Thermal Standard (Installation), published 17 April 2025 | 4 April 2025 |
| 2B(1) | Version 1.0, Microgeneration Installation Standard: MIS 3005-I:2025 Heat Pump: Installation Standard published 1 January 2025 | 22 September 2026 |
| 2B(1) | Version 2.0, Microgeneration Installation Standard: MIS 3005-D:2025 Heat Pump: Design Standard published 5 December 2025 | 22 September 2026 |
| 2B(1) | Version 1.0, Microgeneration Installation Standard: MIS 3004:2025 Biomass: Installation Standard, published 1 January 2025 | 22 September 2026 |
| 2B(1) | Version 1.0, Microgeneration Installation Standard: MIS 3001:2025 Solar Heating: Installation Standard, published 1 January 2025 | 22 September 2026 |
| 2B(2) | Version 2.0, MCS 024 Solar Thermal Domestic Hot Water Energy Calculator, published 1 December 2021 | 1 April 2022 |
| 2B(2) | Version 1.0, MCS 024:2025 Solar Heating Pre-sale Information and System Performance Estimate Standard, published 1 January 2025 | 22 September 2026 |
| 2B(3) | Version 8, Renewable Energy Consumer Code, published 5 July 2023 | 8 May 2024 |
| 2B(3) | Home Insulation and Energy Systems Contractors Scheme (HIES) Code of Practice Version S published on 10 July 2026, and operational from 10 August 2026. | 22 September 2026 |
| 2B(4) | Version 1.0, MCS 026 Seasonal Coefficient of Performance Calculator, published 1 May 2015 | 26 September 2015 |
| Regulation | Non-Domestic Renewable Heat Incentive Regulations 2018: approved standards, calculators | Date standard approved |
|---|---|---|
| 18(2)(a) | Version 4.3 of the document entitled ‘Microgeneration Installation Standard: MIS 3004 The Biomass Installation Standard’ published 5 December 2025. | 26 September 2015 |
| 18(2)(a) | Version 1.0, Microgeneration Installation Standard: MIS 3004:2025 Biomass: Installation Standard, published 1 January 2025 | 22 September 2026 |
| 18(2)(b)(i) | Version 3.0, Microgeneration Installation Standard: MIS 3005-D The Heat Pump Standard (Design), published 5 December 2025 | 22 September 2026 |
| 18(2)(b)(i) | Version 2.0, Microgeneration Installation Standard: MIS 3005-D:2025 Heat Pump: Design Standard published 5 December 2025 | 22 September 2026 |
| 18(2)(b)(ii) | Version 1.0, Microgeneration Installation Standard: MIS 3005-I The Heat Pump Standard (Installation), published 1 December 2021 | 1 April 2022 |
| 18(2)(B)(ii) | Version 1.0, Microgeneration Installation Standard: MIS 3005-I:2025 Heat Pump: Installation Standard published on 1 January 2025 | 22 September 2026 |
| 18(2)(c) | Version 5.0, Microgeneration Installation Standard: MIS 3001 The Solar Thermal Standard (Installation), published 1 December 2021 | 1 April 2022 |
| Schedule 2 Paragraph 5(a) | Version 1.0, MCS 026 Seasonal Coefficient of Performance Calculator, published 1 May 2015 | 26 September 2015 |
| 18(2)(c) | Version 1.0, Microgeneration Installation Standard: MIS 3001:2025 Solar Heating: Installation Standard, published 1 January 2025 | 22 September 2026 |
| 47A (5)(d) | Version 1.0, MCS 040: Planned and Preventative Maintenance of Biomass Appliances - Requirements for Maintenance Engineers carrying out Maintenance Activities, published 30 June 2021 | 1 April 2022 |
| 47(a)(5) | Version 1.0, MCS 040:2025 Planned and Preventative Maintenance of Biomass Appliances - Requirements for Maintenance Engineers carrying out Maintenance Activities, published 30 June 2021 | 22 September 2026 |