Boiler Upgrade Scheme Regulations: approved standards, grant categories and grant levels

These documents list: the standards the Secretary of State has approved for the purposes of Regulation 4 of ‘ The Boiler Upgrade Scheme (England and Wales) Regulations 2022 ’ the grant categories and grant levels the Secretary of State has approved for the purposes of Regulation 13 of ‘ The Boiler Upgrade Scheme Regulations 2022 ’ This notice confirms that the standards listed below are published for the purposes of Regulation 4 of ‘ The Boiler Upgrade Scheme (England and Wales) Regulations 2022 ’. Regulation Approved standards 4(1)(a)(i) BS EN ISO/IEC 17065:2012 Conformity assessment. Requirements for bodies certifying products, processes and services. 4(1)(a)(ii) BS EN ISO/IEC 17065:2012 Conformity assessment. Requirements for bodies certifying products, processes and services. 4(1)(b) Version 7 of the document entitled ‘MCS 007 Product Certification Scheme Requirements: Heat Pumps’ published on 24 April 2025. BS EN 14511-1:2018 Air conditioners, liquid chilling packages and heat pumps with electrically driven compressors for space heating and cooling. Terms and definitions. BS EN 14511-2:2018 Air conditioners, liquid chilling packages and heat pumps with electrically driven compressors for space heating and cooling. Test conditions. BS EN 14511-3:2018 Air conditioners, liquid chilling packages and heat pumps with electrically driven compressors for space heating and cooling. Test methods. BS EN 14511-4:2018 Air conditioners, liquid chilling packages and heat pumps with electrically driven compressors for space heating and cooling. Requirements. 4(1)(c) Version 1.0 of the document entitled ‘MCS 026 Seasonal Coefficient of Performance Calculator’ published on 1 May 2015. BS EN 14825:2018 Air conditioners, liquid chilling packages and heat pumps, with electrically driven compressors, for space heating and cooling. Testing and rating at part load conditions and calculation of seasonal performance. 4(1)(d) Version 3.1 of the document entitled ‘MCS 008 Product Certification Scheme Requirements: Biomass’ published on 1 December 2019. BS EN 303-5:2021 Heating boilers - Heating boilers for solid fuels, manually and automatically stoked, nominal heat output of up to 500 kW. Terminology, requirements, testing and marking. BS EN 16510-1:2018 Residential solid fuel burning appliances - General requirements and test methods. 4(1)(e) BS EN ISO/IEC 17025:2017 General requirements for the competence of testing and calibration laboratories. 4(1)(f) BS EN 303-5:2021 Heating boilers - Heating boilers for solid fuels, manually and automatically stoked, nominal heat output of up to 500 kW. Terminology, requirements, testing and marking. 4(1)(g) In relation to NOx emissions: - BS EN 14792:2017 Stationary source emissions. Determination of mass concentration of nitrogen oxides. Standard reference method. Chemiluminescence. In relation to PM emissions: - BS EN 13284-1:2017 Stationary source emissions. Determination of low range mass concentration of dust. Manual gravimetric method. - BS ISO 9096:2017 Stationary source emissions. Manual determination of mass concentration of particulate matter. 4(1)(h)(i) Version 4.2 of the document entitled ‘Microgeneration Installation Standard: MIS 3004 requirements for contractors undertaking the supply, design, installation, set to work, commissioning and handover of solid biofuel heating systems’ published on 6 May 2015. 4(1)(h)(ii) Issue 1.0 of the document entitled ‘Microgeneration Installation Standard: MIS 3005-I The Heat Pump Standard (Installation)’ published on 1 December 2021. Issue 2.0 of the document entitled ‘Microgeneration Installation Standard: MIS 3005-D The Heat Pump Standard (Design)’ published on 2 December 2024. 4(1)(j) Home Insulation and Energy Systems Contractors Scheme (HIES) Code of Practice Version Q published on 5 March 2025, and operational from 1 May 2025. or Renewable Energy Consumer Code (RECC) Version 8 published 5 July 2023. This notice confirms the grant categories and grant values as approved by the Secretary of State for the purposes of Regulation 13 of the Boiler Upgrade Scheme (England and Wales) Regulations 2022. The grant categories and grant values, set out below, will be effective from 28 April 2026. Approved Grant Categories – Set One A boiler upgrade grant for the installation of: 1. An air-to-water heat pump 2. An air-to-air heat pump 3. A ground source heat pump 4. A biomass boiler Approved Grant Values Grant category Grant Value An air-to-water heat pump £7,500 An air-to-air heat pump £2,500 A ground source heat pump £7,500 A biomass boiler £5,000 ### Version | Version | Summary | | | --- | --- | --- | | Version 1.0 updated on 01/04/2022 | This document summarises the standards the Secretary of State has approved for the purposes of regulation 4 of The Boiler Upgrade Scheme (England and Wales) Regulations 2022. It reproduces information already in notices of publication. The summary does not as such generate legal effects. | | | Version 2.0 updated on 08/05/2024 | Approved consumer codes as required under regulation 4(1)(j) | | | Version 3.0 updated on 03/12/2024 | Approved MCS Design Standard (MIS3005-D) as required under regulation 4(1)(h)(ii) | | | Version 4.0 updated on 25/04/2025 | Approved MCS Heat Pump Product Standard (MCS 007) as required under regulation 4(1)(b) Approved HIES Code of Practice Version Q as required under regulation 4(1)(j) | | ### Approved standards | Legislation reference within The Boiler Upgrade Scheme (England and Wales) Regulations 2022 | Reference number of standard | Title of standard | Date from which standard is approved | Date from which standard ceases to be approved | Notes | Description | | | | | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | | 4(1)(a)(i) - a standard for the purposes of the definition of “installer” in regulation 2(1) | BS EN ISO/IEC 17065:2012 | Conformity assessment. Requirements for bodies certifying products, processes and services | 2022-04-01 00:00:00 | - | - | Regulation 2(1) states an “installer” means a person who is certified by the Microgeneration Certification Scheme or a scheme (a) which is equivalent to the Microgeneration Certification Scheme, and (b) under which installers are certified to standards equivalent to the Microgeneration Certification Scheme’s standards by a certification body or organisation accredited by UKAS to the standard approved by the Secretary of State under regulation 4(1)(a). | | | | | 4(1)(a)(ii) - a standard for the purposes of paragraph 1(b)(i) of Schedule 4 | BS EN ISO/IEC 17065:2012 | Conformity assessment. Requirements for bodies certifying products, processes and services | 2022-04-01 00:00:00 | - | - | Paragraph 1(b)(i) of Schedule 4 states a plant meets the requirements in this Schedule where it is certified under (a) the Microgeneration Certification Scheme as installed in accordance with a relevant installation standard in that scheme, or (b) a scheme where (i) installers are certified to that scheme’s standards by a certification body or organisation accredited by UKAS to the standard approved by the Secretary of State under regulation 4(1)(a). | | | | | 4(1)(b) - one or more standards for heat pumps for the purposes of regulation 9(1)(c) | BS EN 14511-1:2018 | Air conditioners, liquid chilling packages and heat pumps with electrically driven compressors for space heating and cooling. Terms and definitions | 2022-04-01 00:00:00 | - | Heat pumps must meet all of these standards | Regulation 9(1)(c) states a heat pump meets the requirements in this paragraph where (c) it meets the requirements set out in the standards for heat pumps approved by the Secretary of State under regulation 4(1)(b) which are applicable when the plant is first commissioned. | | | | | 4(1)(b) - one or more standards for heat pumps for the purposes of regulation 9(1)(c) | BS EN 14511-2:2018 | Air conditioners, liquid chilling packages and heat pumps with electrically driven compressors for space heating and cooling. Test conditions | 2022-04-01 00:00:00 | - | Heat pumps must meet all of these standards | Regulation 9(1)(c) states a heat pump meets the requirements in this paragraph where (c) it meets the requirements set out in the standards for heat pumps approved by the Secretary of State under regulation 4(1)(b) which are applicable when the plant is first commissioned. | | | | | 4(1)(b) - one or more standards for heat pumps for the purposes of regulation 9(1)(c) | BS EN 14511-3:2018 | Air conditioners, liquid chilling packages and heat pumps with electrically driven compressors for space heating and cooling. Test methods | 2022-04-01 00:00:00 | - | Heat pumps must meet all of these standards | Regulation 9(1)(c) states a heat pump meets the requirements in this paragraph where (c) it meets the requirements set out in the standards for heat pumps approved by the Secretary of State under regulation 4(1)(b) which are applicable when the plant is first commissioned. | | | | | 4(1)(b) - one or more standards for heat pumps for the purposes of regulation 9(1)(c) | BS EN 14511-4:2018 | Air conditioners, liquid chilling packages and heat pumps with electrically driven compressors for space heating and cooling. Requirements | 2022-04-01 00:00:00 | - | Heat pumps must meet all of these standards | Regulation 9(1)(c) states a heat pump meets the requirements in this paragraph where (c) it meets the requirements set out in the standards for heat pumps approved by the Secretary of State under regulation 4(1)(b) which are applicable when the plant is first commissioned. | | | | | 4(1)(b) - one or more standards for heat pumps for the purposes of regulation 9(1)(c) | Version 7 of MCS 007 published on 24 April 2025 | MCS Product Certification Scheme Requirements: Heat Pumps | 2025-04-24 00:00:00 | - | Heat pumps must meet all of these standards | Regulation 9(1)(c) states a heat pump meets the requirements in this paragraph where (c) it meets the requirements set out in the standards for heat pumps approved by the Secretary of State under regulation 4(1)(b) which are applicable when the plant is first commissioned. | | | | | 4(1)(c) - a standard for the purposes of regulation 9(1)(d) | BS EN 14825:2018 | Air conditioners, liquid chilling packages and heat pumps, with electrically driven compressors, for space heating and cooling. Testing and rating at part load conditions and calculation of seasonal performance | 2022-04-01 00:00:00 | - | SCOP must be determined in accordance with both of these standards | Regulation 9(1)(d) states a heat pump meets the requirements in this paragraph where (d) it has a seasonal coefficient of performance of at least 2.8, determined in accordance with the standard approved by the Secretary of State under regulation 4(1)(c) which is applicable when the plant is first commissioned. | | | | | 4(1)(c) - a standard for the purposes of regulation 9(1)(d) | Version 1.0 of MCS 026 published on 1 May 2015 | MCS 026 Seasonal Coefficient of Performance Calculator | 2022-04-01 00:00:00 | - | SCOP must be determined in accordance with both of these standards | Regulation 9(1)(d) states a heat pump meets the requirements in this paragraph where (d) it has a seasonal coefficient of performance of at least 2.8, determined in accordance with the standard approved by the Secretary of State under regulation 4(1)(c) which is applicable when the plant is first commissioned. | | | | | 4(1)(d) - one or more standards for biomass boilers for the purposes of regulation 10(1)(c) | BS EN 303-5:2021 | Heating boilers - Heating boilers for solid fuels, manually and automatically stoked, nominal heat output of up to 500 kW. Terminology, requirements, testing and marking | 2022-04-01 00:00:00 | - | Biomass boilers must meet all of these standards. Note: Biomass boilers installed in non-domestic properties must conform to BS EN 16510-1:2018. | Regulation 10(1)(c) states a biomass boiler meets the requirements in this paragraph where (c) it meets the requirements set out in the standards for biomass boilers approved by the Secretary of State under regulation 4(1)(d) which are applicable when the plant is first commissioned. | | | | | 4(1)(d) - one or more standards for biomass boilers for the purposes of regulation 10(1)(c) | BS EN 16510-1:2018 | Residential solid fuel burning appliances - General requirements and test methods | 2022-04-01 00:00:00 | - | Biomass boilers must meet all of these standards. Note: Biomass boilers installed in non-domestic properties must conform to BS EN 16510-1:2018. | Regulation 10(1)(c) states a biomass boiler meets the requirements in this paragraph where (c) it meets the requirements set out in the standards for biomass boilers approved by the Secretary of State under regulation 4(1)(d) which are applicable when the plant is first commissioned. | | | | | 4(1)(d) - one or more standards for biomass boilers for the purposes of regulation 10(1)(c) | Version 3.1 of MCS 008 published on 1 December 2019 | MCS Product Certification Scheme Requirements: Biomass | 2022-04-01 00:00:00 | - | Biomass boilers must meet all of these standards. Note: Biomass boilers installed in non-domestic properties must conform to BS EN 16510-1:2018. | Regulation 10(1)(c) states a biomass boiler meets the requirements in this paragraph where (c) it meets the requirements set out in the standards for biomass boilers approved by the Secretary of State under regulation 4(1)(d) which are applicable when the plant is first commissioned. | | | | | 4(1)(e) - a standard for the purposes of paragraph 1 of Schedule 1 | BS EN ISO/IEC 17025:2017 | General requirements for the competence of testing and calibration laboratories | 2022-04-01 00:00:00 | - | - | Paragraph 1 of Schedule 1 states an emissions certificate meets the requirements in this Schedule where it is issued by a testing laboratory which is accredited by UKAS to the standard approved by the Secretary of State under regulation 4(1)(e) (“the laboratory accreditation standard”) at the time of testing. | | | | | 4(1)(f) - a standard for the purposes of paragraph 2 of Schedule 1 | BS EN 303-5:2021 | Heating boilers - Heating boilers for solid fuels, manually and automatically stoked, nominal heat output of up to 500 kW. Terminology, requirements, testing and marking | 2022-04-01 00:00:00 | - | - | Paragraph 2 of Schedule 1 states the requirements in this paragraph are that testing is carried out in accordance with the provisions relevant to emissions of PM and NOx in the standard approved by the Secretary of State under regulation 4(1)(f). | | | | | 4(1)(g) - a standard in relation to NOx emissions and a standard in relation to PM emissions for the purposes of paragraph 3(a) of Schedule 1 | In relation to NOx emissions: BS EN 14792:2017 | Stationary source emissions. Determination of mass concentration of nitrogen oxides. Standard reference method. Chemiluminescence | 2022-04-01 00:00:00 | - | - | Paragraph 3(a) of Schedule 1 states the requirements in this paragraph are that (a) testing is carried out in accordance with the standards approved by the Secretary of State under regulation 4(1)(g) in relation to (i) NOx emissions, and (ii) PM emissions. | | | | | 4(1)(g) - a standard in relation to NOx emissions and a standard in relation to PM emissions for the purposes of paragraph 3(a) of Schedule 1 | In relation to PM emissions: BS EN 13284-1:2017, or | Stationary source emissions. Determination of low range mass concentration of dust. Manual gravimetric method | 2022-04-01 00:00:00 | - | Either standard in relation to PM emissions can be met | Paragraph 3(a) of Schedule 1 states the requirements in this paragraph are that (a) testing is carried out in accordance with the standards approved by the Secretary of State under regulation 4(1)(g) in relation to (i) NOx emissions, and (ii) PM emissions. | | | | | 4(1)(g) - a standard in relation to NOx emissions and a standard in relation to PM emissions for the purposes of paragraph 3(a) of Schedule 1 | BS ISO 9096:2017 | Stationary source emissions. Manual determination of mass concentration of particulate matter | 2022-04-01 00:00:00 | - | Either standard in relation to PM emissions can be met | Paragraph 3(a) of Schedule 1 states the requirements in this paragraph are that (a) testing is carried out in accordance with the standards approved by the Secretary of State under regulation 4(1)(g) in relation to (i) NOx emissions, and (ii) PM emissions. | | | | | 4(1)(h)(i) - one or more installation standards for biomass boilers | Version 4.2 of MIS 3004 published on 6 May 2015 | Microgeneration Installation Standard: MIS 3004 requirements for contractors undertaking the supply, design, installation, set to work, commissioning and handover of solid biofuel heating systems | 2022-04-01 00:00:00 | - | - | Paragraph 2(a) of Schedule 4 states “relevant installation standard” in relation to a plant means an installation standard which (a) is approved by the Secretary of State under regulation 4(1)(h). | | | | | 4(1)(h)(ii) - one or more installation standards for heat pumps | Issue 1.0 of MIS 3005-I published on 1 December 2021 | Microgeneration Installation Standard: MIS 3005-I The Heat Pump Standard (Installation) | 2022-04-01 00:00:00 | - | Both installation standards must be met | Paragraph 2(a) of Schedule 4 says “relevant installation standard” in relation to a plant means an installation standard which (a) is approved by the Secretary of State under regulation 4(1)(h). | | | | | 4(1)(h)(ii) - one or more installation standards for heat pumps | Issue 2.0 of MIS 3005-D published on 2 December 2024. | Microgeneration Installation Standard: MIS 3005-D The Heat Pump Standard (Design) | 2024-12-03 00:00:00 | - | Both installation standards must be met | Paragraph 2(a) of Schedule 4 says “relevant installation standard” in relation to a plant means an installation standard which (a) is approved by the Secretary of State under regulation 4(1)(h). | | | | | 4(1)(j) - one or more codes of practice for consumer protection for the purpose of the definition of “consumer code” in regulation 2(1) | Version Q of HIES Code of Practice published on 5 March 2025 | Home Insulation and Energy Systems Contractors Scheme (HIES) Code of Practice | 2025-05-01 00:00:00 | | Only one consumer code standard must be met | Regulation 2(1) states a 'consumer code' means a code of practice for the purpose of consumer protection approved by the Secretary of State under regulation 4(1)(j); | | | | | 4(1)(j) - one or more codes of practice for consumer protection for the purpose of the definition of “consumer code” in regulation 2(1) | Version 8 RECC Consumer Code published 5 July 2023 | Renewable Energy Consumer Code (RECC) Consumer Code | 2024-05-08 00:00:00 | | Only one consumer code standard must be met | Regulation 2(1) states a 'consumer code' means a code of practice for the purpose of consumer protection approved by the Secretary of State under regulation 4(1)(j); | | | |