Installation guide
BEFORE
INSTALLATION
EXHAUST-AIR
MODE
The
exhaust
air
is
discharged
upwards
through
a
duct
or
directly
through
an
exterior
wall
to
the
outdoors.
x=
Exhaust
air
should
neither
be
directed
into
a
smoke
or
exhaust
flue
(chimney)
that
is
currently
used
for
other
pur-
poses
nor
into
a
duct
that
is
used
for
ventilating
rooms
in
which
stoves
or
fireplaces
are
also
located.
Exhaust
air
may
be
discharged
in
accordance
with
official
and
statutory
regulations
only
(e.g.
national
building
regulations).
Local
government
regulations
must
be
observed
when
discharging
air
into
smoke
or
exhaust
flues
that
are not
otherwise
in
use.
x=
When
the
extractor
hood
is
operated
in
exhaust-air
mode
simultaneously
with
a
different
heating
system
that
also
makes
use
of
the
same
chimney
(such
as
gas,
oil
or
coal-fired
heaters,
continuous-flow
heaters,
hot-
water
boilers),
care
must
be
taken
to
ensure
that
there
is
an
adequate
supply
of
fresh
air,
which
will
be
needed
by
the
heating
system
for
combustion.
Safe
operation
is
possible
provided
that
the
negative
pres-
sure
in
the
room
where
the
heating
system
is
installed
does
not
exceed
4
Pa
(0.04
mbar).
This
can
be
achieved
if
combustion
air
can
flow
through
non-lockable
openings,
such
as
doors,
windows
and
through
the
air-intake/exhaust-air
wall
box.
WARNING
-
Avoid
risk
of
poisoning
-—
If
the
air
intake
is
inadequate,
there
is
a
risk
of
poisoning
from
com-
bustion
gases
that
are
drawn
back
into
the
room.
Note:
When
assessing
the overall
requirements,
the
com-
bined
ventilation
system
for
the
entire
household
must
be
taken
into
consideration.
This
rule
does
not
apply
to
the
use
of
cooking
appliances,
such
as
cooktops
and
ovens.
Unrestricted
operation
is
possible
if
the
extractor
hood
is
used
in
recirculating
mode
-
with
activated
carbon
filters.
If
the
exhaust
air
is
going
to
be
discharged
to
the
out-
doors,
a
telescopic
wall
box
should
be
fitted
into
the out-
side
wall.
PAGE
4
For
optimum
hood
efficiency:
Q
Short,
smooth
ductwork.
Q)
As
few
bends
in
the
ductwork
as
possible.
Q!
Diameter
of
ductwork
to
be
as
wide
as
possible
with no
tight
bends
in
Guctwork.
If
using
long,
rough
exhaust-air
ductwork,
several
duct
elbows
or
ductwork
with
a
narrower
diameter,
the
rate
of
air
extraction
will
no
longer
be
at
an
optimum
level
and
there
will
be an
increase
in
noise.
IMPORTANT:
The
manufacturer
of
the
hood
accepts
no
liability
for
complaints
which
can
be
attributed
to
the
design
and
layout
of
the
duct-
work.
Round
duct
sections:
Recommended
internal
diameter:
6”/10”.
Flat
ducts
must
have
an
internal
cross-section
equal
to
that
of
round
duct
sections.
Minimum
@
6”
approx.
28.3
inches’.
If
ducts
have
different
diameters:
insert
sealing
strip
for
transition.
For
exhaust-air
mode,
ensure
that
there
is
an
acequate
supply
of
fresh
air.