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EP 4 798 909 A1

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(43) Date of publication: 02.09.2026 Bulletin 2026/36 (21) Application number: 24794784.9 (22) Date of filing: 24.10.2024

(51) International Patent Classification (IPC):  F24D 3/10(2006.01) F24H 15/443(2022.01) F24D 19/10(2006.01) (52) Cooperative Patent Classification (CPC): F24D 19/1039; F24D 19/1072; F24D 2200/04; F24D 2200/12; F24D 3/1066; F24H 15/443; F24H 15/493; F24D 2200/32 (86) International application number: PCT/EP2024/080007 (87) International publication number: WO 2025/088001 (01.05.2025 Gazette 2025/18)

(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: GE KH MA MD TN (30) Priority: 27.10.2023 EP 23206379 (71) Applicant: BDR Thermea Group B.V. 7332 BD Apeldoorn (NL)

(72) Inventors: ZAIKH, Zakaria 7332 BD Apeldoorn (NL) EKKELENKAMP, Ralf 7332 BD Apeldoorn (NL) GESSLER, Roman 7332 BD Apeldoorn (NL) FREESE, Henning 7332 BD Apeldoorn (NL) PATZKE, Uwe 7332 BD Apeldoorn (NL) BOHNER, Florian 7332 BD Apeldoorn (NL) BRUNKEN, Dirk 7332 BD Apeldoorn (NL) (74) Representative: Grabovac, Dalibor  AAP Patentanwaltskanzlei Grabovac Pfeivestlstr. 12 81243 München 81243 München (DE)