(19)

(11)

EP 2 564 144 A2

(12)

(88) Date of publication A3: 12.01.2012 (43) Date of publication: 06.03.2013 Bulletin 2013/10 (21) Application number: 11721636.6 (22) Date of filing: 19.04.2011

(51) International Patent Classification (IPC):  F28D 15/02(2006.01) F28F 1/36(2006.01) F28F 9/22(2006.01) (86) International application number: PCT/GB2011/050775 (87) International publication number: WO 2011/135334 (03.11.2011 Gazette 2011/44)

(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: 26.04.2010 GB 201006863 (71) Applicant: Econotherm UK Limited Bridgend, CF31 3YY (GB)	(72) Inventor: Fetcu, Dumitru Cardiff, South Wales CF5 2NS (GB) (74) Representative: Davies, Elliott et al Wynne-Jones, Laine & James LLP Temple Court 13A Cathedral Road Cardiff CF11 9HA Cardiff CF11 9HA (GB)