10 Phenix green
A
B
D'
D'
D
D
D
OK!
OK!
When the fi replace burns wood using combustion air from
the room, it uses up the room’s air. This air exits via the
chimney (D).
This must therefore be compensated for with the usual
intakes (A and B). If these are not suffi cient, a new fresh
air intake must be added (C). Using a ventilation hood in
the same living space creates an additional air outlet (D’),
which must also be compensated for.
This intake should preferably be located near the fi replace.
This is to avoid cold draughts across the room, a depression
in the room, and to contribute to air renewal.
4. 2. CONVECTION AIR (hot air)
Circulation of this hot air can be improved using the 750 m³ fan. Without a fan, this is called «natural
convection» and with a fan, «forced convection». Warning: the installation confi guration can vary.
For a fi replace without a fan, it is imperative that the four hot air vents located above the fi replace
be connected, whereas with a fan, only two must be connected as long as the fan is always turned
on when the fi replace is in use. Another difference: the air intakes located in the lower part of the
back wall of the fi replace must be open when there is no fan and closed when forced convection is
used.
Using the hot air vents: This enables extraction of heat from the fi replace to send it to another room
other than the one the fi replace is in. In this case, the contribution of these outlets is limited to +/- 1
KW per outlet and thermally insulated ducts are recommended to create a “draught” for the convec-
tion air. When the ducts are installed, limit their length (maximum 2.5 m) and changes in direction.
Make elbows as wide as possible and avoid using outlet grilles with a low permeability coeffi cient as
the loss of speed they induce will signifi cantly decrease the effectiveness of the hot air outlets. The
ducts cannot be positioned downwards as this will go against the natural direction of hot air fl ow.
If hot air is sent to another room, an air return at least equal in area to the hot air outlets must be
provided. This is very important to avoid creating a depression in the room which could cause pro-
blems with the fi replace’s operation.
Convection air circuits must also be taken into account (see the convection diagrams below).
