Bellfires Corner Bell Large 3 L/R CF, Installation Manual

Page: 15 / 80

15 Bell fi res Installation instructions
CLEARANCES
Ventilation
Ventilate the fi replace/chimney breast:
• all spaces between the appliance and the insulation plates
• all spaces between the insulation plates an all surrounding walls
by allowing vents above.
Minimal required net vent openings above must be total 46 sq ins (300 cm
2
).
This can be done by ventilation openings or grills.
The design of the ventilation openings/grills is free to choose.
Place the ventilation opening/grills at minimal 4" (10 cm) distance under the ceiling, to
prevent discoloration.
Also an open distance between the fi replace/chimney breast and the ceiling of 2" (5 cm),
over a minimal width of 23" (60 cm), is suffi cient. (Is also total 46 sq ins (300 cm
2
).)
Non-combustible insulation plate/board
Any used insulation plates must have a maximum thermal conductivity of
0.69 BTU / (ft
2 .h.°F/in) (0.10 W/m.K).
Suitable insulation materials are listed in table 1.
Do not use fi breglass or Rockwool, or similar material. These materials emit a pungent
odour, which is considered extremely unpleasant.
Table 1: Suitable insulation material
Plate material Thermal conductivity
BTU/(ft 2 .h.°F/in) (W/m.K)
Promat Promatect L insulating board 0.57 (0.083)
Skamol Skamotec 225 0.416 (0.06)
Skamol Super-Isol 0.55 (0.08)