(19)

(11)

EP 4 487 014 A1

(12)

(43) Date of publication: 08.01.2025 Bulletin 2025/02 (21) Application number: 23707148.5 (22) Date of filing: 14.02.2023

(51) International Patent Classification (IPC):  F04D 29/42(2006.01) F04D 29/68(2006.01) F04D 29/44(2006.01) (52) Cooperative Patent Classification (CPC): F04D 29/444; F04D 29/4213; F04D 29/681 (86) International application number: PCT/GB2023/050330 (87) International publication number: WO 2023/166276 (07.09.2023 Gazette 2023/36)

(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: 01.03.2022 GB 202202790 (71) Applicant: Volution Ventilation Group Limited Crawley, West Sussex RH10 9YX (GB)	(72) Inventor: CARTER, Ashley, Robert West Sussex RH10 9YX (GB) (74) Representative: Richards, Michèle E. et al Fry Heath & Spence LLP Unit A, Faraday Court Faraday Road Crawley, West Sussex RH10 9PU Crawley, West Sussex RH10 9PU (GB)