(19)

(11)

EP 2 344 814 A1

(12)

(43) Date of publication: 20.07.2011 Bulletin 2011/29 (21) Application number: 09821650.0 (22) Date of filing: 21.10.2009

(51) International Patent Classification (IPC):  F24F 13/078(2006.01) F24F 3/056(2006.01) (86) International application number: PCT/FI2009/050845 (87) International publication number: WO 2010/046536 (29.04.2010 Gazette 2010/17)

(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 SM TR Designated Extension States: AL BA RS (30) Priority: 22.10.2008 FI 20085999 (71) Applicant: YIT Kiinteistötekniikka Oy 00620 Helsinki (FI)	(72) Inventor: MYYRYLÄINEN, Mikko FI-00980 Helsinki (FI) (74) Representative: Holmström, Stefan Mikael  Kolster Oy Ab Iso Roobertinkatu 23 P.O. Box 148 00121 Helsinki 00121 Helsinki (FI)