(19)

(11)

EP 1 438 536 A1

(12)

(43) Date of publication: 21.07.2004 Bulletin 2004/30 (21) Application number: 02773113.2 (22) Date of filing: 01.10.2002

(51) International Patent Classification (IPC)7: F24D 11/02 (86) International application number: PCT/SE2002/001778 (87) International publication number: WO 2003/042600 (22.05.2003 Gazette 2003/21)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR Designated Extension States: AL LT LV MK RO SI (30) Priority: 01.10.2001 SE 0103257 (71) Applicant: Första Närvärmeverket AB 161 11 Bromma (SE)	(72) Inventor: GÖRANSSON, Hans-Göran S-821 94 Bollnäs (SE) (74) Representative: Löfgren, Jonas et al Bjerkéns Patentbyrä KB,Box 1274 801 37 Gävle 801 37 Gävle (SE)