The Clean Heat Market Mechanism Regulations 2025
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Change 1
3 Stand-alone heat pumps
(1) A heating appliance falls within this paragraph where— (a) it is incapable of burning fossil fuels or peat to generate heat; (b) it generates heat using a thermodynamic cycle by— (i) transferring energy stored in the form of heat in the air and using that energy to heat a liquid; or (ii) transferring energy stored in the form of heat in the ground, including heat in water in or on the ground, and using that energy to heat a liquid; (c) subject to paragraph (2), no part of the heating appliance which generates heat was used before the heating appliance was installed; (d) it has a capacity of no more than 45 kilowatt thermal; (e) it uses a compressor which is driven by electricity; (f) it provides heating for the purpose of space heating, whether or not it also provides hot water heating, using liquid as a medium for delivering that heat; and (g) the heating appliance— (i) is capable of meeting the full space heating and hot water heating demands of the building at which it is installed, whether alone or in combination with other appliances that generate heat and are incapable of burning fossil fuels to do so; and (ii) if installed at a building in combination with one or more additional stand-alone heat pumps, its and their combined capacity is no more than 70 kilowatt thermal. (2) The requirement in paragraph (1)(c) does not apply to a shared ground loop. (3) For the purposes of paragraph (2)— “ground loop” means equipment which absorbs energy stored in the form of heat in the ground, including heat in water in or on the ground; “shared ground loop” means a ground loop which provides heat energy through a hydraulic connection to heating appliances at two or more buildings. (4) For the purposes of paragraph (1)(f) and (g)(i), and regulation 4(1)(b) and (c) (hybrid heating systems), “hot water” means hot water which is intended for the personal use of the individuals who use or occupy the building, and does not include hot water used for the purposes of— (a) space heating; (b) heating a swimming pool; or (c) carrying out a process.
3 Stand-alone heat pumps
(1) A heating appliance falls within this paragraph where— (a) it is incapable of burning fossil fuels or peat to generate heat; (b) it generates heat using a thermodynamic cycle by— (i) transferring energy stored in the form of heat in the air and using that energy to heat a liquid; or (ii) transferring energy stored in the form of heat in the ground, including heat in water in or on the ground, and using that energy to heat a liquid; (c) subject to paragraph (2), no part of the heating appliance which generates heat was used before the heating appliance was installed; (d) it has a capacity of no more than 45 kilowatt thermal; (e) it uses a compressor which is driven by electricity; (f) it provides heating for the purpose of space heating, whether or not it also provides hot water heating, using liquid as a medium for delivering that heat; and (g) the heating appliance— (i) is capable of meeting the full space heating and hot water heating demands of the building at which it is installed, whether alone or in combination with other appliances that generate heat and are incapable of burning fossil fuels to do so; and (ii) if installed at a building in combination with one or more additional stand-alone heat pumps, its and their combined capacity is no more than 70 kilowatt thermal. (2) The requirement in paragraph (1)(c) does not apply to a shared ground loop. (3) For the purposes of paragraph (2)— “ground loop” means equipment which absorbs energy stored in the form of heat in the ground, including heat in water in or on the ground; “shared ground loop” means a ground loop which provides heat energy through a hydraulic connection to heating appliances at two or more buildings. (4) For the purposes of paragraph (1)(f) and (g)(i), and regulation 4(1)(b) and (c) (hybrid heating systems), “hot water” means hot water which is intended for the personal use of the individuals who use or occupy the building, and does not include hot water used for the purposes of— (a) space heating; (b) heating a swimming pool; or (c) carrying out a process.
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