21
CHOOSING SUITABLE SURROUN-
DINGS
In the room chosen to accommodate the
gas appliance, there must be an adequa
-
te natural draft to allow combustion of the
gas.
The natural draft must be produced directly
by one or more vents made in the external
walls and providing a total opening of at le
-
ast 200 cm
2
.
The vents must be positioned close to the
floor, preferably on the opposite side to the
combustion discharge outlet and must be
designed in such a way that they cannot
be obstructed either from the inside or the
outside.
When it is not possible to provide the ne-
cessary vents, the draft may be supplied
from an adjacent room, ventilated in the
required manner, provided it is not a bedro
-
om or an area at risk.
In this event, the door of the kitchen must
be opened to allow the draft to enter the
room.
There must be a distance of at least 650
mm between the hob of the cooker and any
wall cupboard or extractor hood positioned
immediately above (see fig. 7.3).
DISCHARGING PRODUCTS OF
COMBUSTION
Extractor hoods connected directly to the
outside must be provided, to allow the pro
-
ducts of combustion of the gas appliance to
be discharged (fig. 7.3).
If this is not possible, an electric fan may
be used, attached to the external wall or
the window; the fan should have a capacity
to circulate air at an hourly rate of 3-5 times
the total volume of the kitchen (fig. 7.4).
The fan can only be installed if the room
has suitable vents to allow air to enter, as
described under the heading “Choosing
suitable surroundings”.
This appliance is not connected to a
device to evacuate the combustion
products. This must be installed and
connected in conformity with the in-
stallation rules in force. Pay special
care to room ventilation as well.
H
m
in
6
50
m
m
Extractor hood
for products of
combustion
Air vent
Electric fan to
extract products
of combustion
Air vent
Fig. 7.4
Fig. 7.3
Содержание N58740 Series
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