(19)

(11)

EP 2 304 331 A1

(12)

(43) Date of publication: 06.04.2011 Bulletin 2011/14 (21) Application number: 08769369.3 (22) Date of filing: 09.05.2008

(51) International Patent Classification (IPC):  F24H 9/20(2006.01) F24D 5/00(2006.01) (86) International application number: PCT/US2008/063171 (87) International publication number: WO 2009/136940 (12.11.2009 Gazette 2009/46)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR Designated Extension States: AL BA MK RS (71) Applicant: Kidde-Fenwal, Inc. Ashland, MA 01721 (US)	(72) Inventors: GREENE, Walter, Robert Bellingham Massachusetts 02019 (US) MARTINEZ, Juan Antonio Watertown Massachusetts 02472 (US) (74) Representative: Chiva, Andrew Peter  Dehns St Bride's House 10 Salisbury Square London EC4Y 8JD London EC4Y 8JD (GB)