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(11)

EP 4 103 880 A1

(12)

(43) Date of publication: 21.12.2022 Bulletin 2022/51 (21) Application number: 20918889.5 (22) Date of filing: 12.02.2020

(51) International Patent Classification (IPC):  F23D 14/32(2006.01) F23C 5/08(2006.01) F23D 14/22(2006.01) F23M 3/04(2006.01) F23C 5/00(2006.01) F23C 5/14(2006.01) F23M 3/02(2006.01) (52) Cooperative Patent Classification (CPC): F23D 14/32; F23D 14/22; F23D 14/583 (86) International application number: PCT/US2020/017854 (87) International publication number: WO 2021/162684 (19.08.2021 Gazette 2021/33)

(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: Selas Heat Technology Company LLC Streetsboro, OH 44241 (US)	(72) Inventors: ANDERSON, Scott C. Orlando, FL 32833 (US) FONTES, David Englewood, FL 34224 (US) (74) Representative: Potter Clarkson  The Belgrave Centre Talbot Street Nottingham NG1 5GG Nottingham NG1 5GG (GB)