(19)

(11)

EP 2 531 778 A1

(12)

(43) Date of publication: 12.12.2012 Bulletin 2012/50 (21) Application number: 10805722.5 (22) Date of filing: 15.12.2010

(51) International Patent Classification (IPC):  F24F 9/00(2006.01) (86) International application number: PCT/GB2010/002272 (87) International publication number: WO 2011/092448 (04.08.2011 Gazette 2011/31)

(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 (30) Priority: 01.02.2010 GB 201001570 (71) Applicant: Mechanical&Internal Environmental Services Ltd Wellingborough, Northants NN8 5PH (GB)	(72) Inventor: MARIS, Richard William Wellingborough, Northants NN8 5PH (GB) (74) Representative: Smith, Peter James  Serjeants LLP 25 The Crescent King Street Leicester LE1 6RX Leicester LE1 6RX (GB)