(19)

(11)

EP 0 885 371 A1

(12)

(43) Date of publication: 23.12.1998 Bulletin 1998/52 (21) Application number: 97905240.0 (22) Date of filing: 21.02.1997

(51) International Patent Classification (IPC):  F27B 9/ 06( . ) F27D 3/ 12( . ) F27B 9/ 24( . ) (86) International application number: PCT/GB1997/000494 (87) International publication number: WO 1997/031233 (28.08.1997 Gazette 1997/37)

(84) Designated Contracting States: BE DE ES FR GB IE IT NL PT (30) Priority: 22.02.1996 GB 19960003773 (71) Applicant: Consultant Gas Engineers Limited Skelmersdale, Lancashire WN8 9PT (GB)	(72) Inventor: BOYLETT, William Frederick Skelmersdale, Lancashire WN8 9PT (GB) (74) Representative: Brandon, Paul Laurence  APPLEYARD LEES, 15 Clare Road Halifax HX1 2HY Halifax HX1 2HY (GB)