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(11)

EP 4 551 868 A1

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(43) Date of publication: 14.05.2025 Bulletin 2025/20 (21) Application number: 23836048.1 (22) Date of filing: 05.07.2023

(51) International Patent Classification (IPC):  F24D 17/02(2006.01) F24D 3/08(2006.01) F24H 1/16(2022.01) F24H 4/02(2022.01) F24D 3/18(2006.01) F24H 9/00(2022.01) (52) Cooperative Patent Classification (CPC): F24H 4/02; F24H 1/52; F24H 8/00 (86) International application number: PCT/US2023/026895 (87) International publication number: WO 2024/010788 (11.01.2024 Gazette 2024/02)

(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: 06.07.2022 US 202263367758 P (71) Applicant: Rheem Manufacturing Company Atlanta, GA 30328 (US)	(72) Inventor: MAHAJAN, Govinda Atlanta, Georgia 30328 (US) (74) Representative: Reddie & Grose LLP  The White Chapel Building 10 Whitechapel High Street London E1 8QS London E1 8QS (GB)