(19)

(11)

EP 4 423 437 A1

(12)

(43) Date of publication: 04.09.2024 Bulletin 2024/36 (21) Application number: 22799966.1 (22) Date of filing: 25.10.2022

(51) International Patent Classification (IPC):  F24H 1/18(2022.01) F24H 1/44(2022.01) F24H 1/10(2022.01) F24H 1/14(2022.01) F24H 1/20(2022.01) F24H 1/48(2022.01) F24H 1/12(2022.01) (52) Cooperative Patent Classification (CPC): F24H 1/44; F24H 1/48; F24H 1/103; F24H 1/107; F24H 1/121; F24H 1/142; F24H 1/145 (86) International application number: PCT/GB2022/052713 (87) International publication number: WO 2023/073358 (04.05.2023 Gazette 2023/18)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA Designated Validation States: KH MA MD TN (30) Priority: 27.10.2021 GB 202115479 (71) Applicant: Digital Heat Ltd Sussex TN40 1HH (GB)	(72) Inventor: WHITE, Matthew Bexhill-On-Sea Sussex TN40 1HH (GB) (74) Representative: Patel, Binesh  Beuro IP Limited 11 St. Paul's Square Birmingham B3 1RB Birmingham B3 1RB (GB)