Bellfires View Bell Medium 3 CF Installation Manual page 15

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
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
Non-combustible insulation plate/board
Any used insulation plates must have a maximum thermal conductivity of
2
0.69 BTU / (ft .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.
Plate material
Promat Promatect L insulating board
Skamol Skamotec 225
Skamol Super-Isol
Table 1: Suitable insulation material
Bellfi res
CLEARANCES
Thermal conductivity
BTU/(ft
0.57
0.416
0.55
15
2 ).
2 .h.°F/in) (W/m.K)
(0.083)
(0.06)
(0.08)
Installation instructions
2 ).)