Douglas BF 10-LPG Installations- und Benutzerhandbuch - Seite 6

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DOUGLAS & Co. BF 10H-NG BF 10-LPG HEATER UNITS
INSTALLATION USER INSTRUCTION MANUAL
Page 6 of 20
5
installation of flue systems : (Continued)
DIMENSIONS FOR PLANNING FLUE CUT-OUT : All dimensions
are in mm.
NOTE ;
Outer Air Duct distance to Face of External Wall (for
Balanced Flue Assembly)
as shown is 360 mm before any Air Duct is cut to suit
actual wall thickness .
The minimum length of the flue is 545 (do not cut past
the internal taper. The
maximum length of the flue is 745 mm.
SIZE OF EXTERNAL WALL BALANCED FLUE ASSEMBLY ON OUTER
WALL