Issue 1
7
570mm
610mm
310mm
410mm
1.7 fitting to metal flue boxes
A DOUBLE WALLED RECESSED FLUE BOX BUILT TO THE REQUIREMENTS OF BS 715 OR
BS EN 1856
WITH
AN INSULATED FLUE HAVING A MINIMUM DIAMETER OF 125mm (5”) AND A MINIMUM
EFFECTIVE OVERALL HEIGHT OF 3 METERS (10ft)
RECESSED GAS FLUE BOX DIMENSIONS (NOT INCLUDING FIBRE GLASS INSULATION)
NOTE
THE METAL FLUE BOX MUST BE INSULATED WITH FIBRE GLASS OR EQUIVALENT TO A THICKNESS OF 50 mm.
NOTE
WHERE INSTALLATION IS FOR A METAL FLUE BOX, THE SURROUND MUST HAVE A TEMPERATURE RATING OF 150
DEGREES C .
NOTE
IF THE FLUE BOX IS TO BE USED WITH AN EXISTING BRICK OR STONE CHIMNEY A 125 mm (5”) MINIMUM DIAMETER
FLUE LINER CONFORMING TO BS 715 MAY BE USED.
NOTE
A BRICK CHAMBER TO THE SIZES IN FIG 2 IN AN EXISTING BRICK OR STONE CHIMNEY A 125mm
MINIMUM DIAMETER FLUE LINER CONFORMING TO BS EN 1856 MAY BE USED, PROVIDING IT IS
SEALED AT THE TOP AND BOTTOM OF THE EXISTING BRICK OR STONE CHIMNEY.
1.8 Hearths
This appliance must only be installed on to a non combustible hearth, the hearth material must be a minimum
thickness of 12mm with the top surface at least 50mm above the floor, the hearth must be fitted symmetrically
about the fire opening and have a minimum width of 760mm and a minimum projection 300mm forwards from
the opening
