(19)

(11)

EP 4 251 932 A1

(12)

(43) Date of publication: 04.10.2023 Bulletin 2023/40 (21) Application number: 20963398.1 (22) Date of filing: 27.11.2020

(51) International Patent Classification (IPC):  F24T 10/17(2018.01) (52) Cooperative Patent Classification (CPC): F24T 10/17; Y02E 10/10; F24T 2010/53; F24T 2010/50 (86) International application number: PCT/FI2020/050805 (87) International publication number: WO 2022/112643 (02.06.2022 Gazette 2022/22)

(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 MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (71) Applicant: Senera Oy 01380 Vantaa (FI)	(72) Inventor: MANNER, Mika 02330 Espoo (FI) (74) Representative: Papula Oy  P.O. Box 981 00101 Helsinki 00101 Helsinki (FI)