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15x15
Fig. 22
25x20
25x20
Fig. 23
The air distribution ducts must have an internal
cross-section of 25x20 cm, be made of smooth
galvanised sheet metal and insulated with an in-
sulating layer to avoid noise and heat dispersion.
When the fireplace is used to heat two or more
adjacent rooms, it is essential to promote the
recirculation of ambient air to even out the tem-
perature in the different rooms, therefore provide
the doors with grilles or keep them ajar.
EXAMPLE OF AIR DUCTING
(
BM
= Ceiling delivery vent complete with calibra-
tion shutter
GT
= Grille on lower part of door
A+B
= Ambient air intake GRILLES with 14 cm
holes, connected to the fan with a flexible hose,
with or without fixed grille, without shutter
C
=External air intake opening located under the
hearth, with grille with fixed fins and anti-insect
screen.
D
= Hot air distribution with galvanised steel duct-
ing fitted on the ceiling, net internal cross-section
25x20 cm, about 12 m long (depending on the fan
version, the number of bends and the materials
used), 3 cm external insulation and possible plas-
terboard masking.
A
B
BM
BM
BM
C
D
BM
GT
GT
BM
BM
GT
D
Fig. 24
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