(19)

(11)

EP 2 297 523 A2

(12)

(43) Date of publication: 23.03.2011 Bulletin 2011/12 (21) Application number: 09735593.7 (22) Date of filing: 20.04.2009

(51) International Patent Classification (IPC):  F24D 19/02(2006.01) (86) International application number: PCT/GB2009/050393 (87) International publication number: WO 2009/130497 (29.10.2009 Gazette 2009/44)

(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 MK MT NL NO PL PT RO SE SI SK TR Designated Extension States: AL BA RS (30) Priority: 23.04.2008 GB 0807382 (71) Applicant: Easi-Rad Limited Norwich Norfolk NR13 6AL (GB)	(72) Inventor: WILSON, Trevor William Norwich Norfolk NR13 6RZ (GB) (74) Representative: Martin, Philip John  Marks & Clerk LLP 62-68 Hills Road Cambridge CB2 1LA Cambridge CB2 1LA (GB)