Datasheet

Essential reading before deciding on a cooker hood.
You’ll enjoy a cleaner kitchen with a ducted hood - as steam, vapour, smoke and odours
are quickly and efficiently removed. Your home will benefit from this improved environment –
free from the lingering fumes and smells associated with cooking.
Every Britannia hood is ultra efficient. Superbly designed with modern living in mind –
each of our high specification units is remarkably quiet during operation and Britannia
renowned reliability comes as standard.
General
Britannia hoods help remove
cooking smells, vapours and
condensation and are designed for
quiet operation.
As a general rule the hood should be
activated before cooking commences.
You will mainly use the lower and
mid speeds during normal cooking,
resorting to maximum speed when
dealing with emergencies – such as
burning the toast! Maximum speed
is sometimes necessary when using
all burners or when griddling meat
as this can create excessive vapours.
To assist you when making
comparisons between products, you
will find against each model the
noise levels and the performance
in cubic metres per hour for the
maximum and minimum speeds.
The performance of a hood is
extremely important and is normally
measured in cubic metres per hour,
i.e. how much air is moved. All
Britannia hoods have superior,
powerful motors so it’s well worth
making comparisons before making
your decision.
Correct airflow levels
Choosing the appropriate extraction
power of the hood (airflow) generally
depends on the size of the kitchen
and the kind of cooking that takes
place there.
The air capacity of a hood is
expressed in cubic metres per hour
(m3/h), and represents the quantity
of air which the hood is able to
extract at maximum speed,
measured according to international
standard IEC EN 61591.
To calculate the appropriate airflow
level for your kitchen, multiply the
volume of your kitchen by ten. For
example: if your kitchen is 3 metres
wide, 5 metres long and 2.7 metres
high, your calculation would be
(3 x 5 x 2.7) = 40.5 x 10 = 405.
This would mean a hood with an
extraction of 400 m3/h or more
will achieve efficient ventilation
of the room.
If you often cook fish, fried foods,
grilled meat or other dishes which
produce a large quantity of smoke,
grease and odours, we advise that
you select a hood with an even
greater air capacity. Britannia offer
a wide choice of hoods with air flow
levels of up to 2000 m
3/h.
Extraction
Ducting out or recycling? It is
always preferable to use Britannia
hoods as ducted models, i.e. ducted
through an outside wall.
Air is drawn into the hood, fats are
trapped by the grease filter. Odours,
fumes and condensation are then
expelled to the outside.
On certain models you can choose
to install the hood as a ducted
model or a recycling model – we
would only recommend that a hood
is used as a recycling model if it is
impossible to duct out. When using
a hood as a recycling model, air is
drawn into the hood and fats are
trapped by the grease filter. The air
then passes through charcoal filters
to help absorb cooking odours and
the purified air is recycled back into
the kitchen.
It is realistic to assume that using
a hood on recycling mode will
circulate at least 30% less air than
by ducting out – this is because the
charcoal filters will restrict a certain
amount of airflow. Charcoal filters
are an optional extra unless
otherwise indicated and will require
replacing at least every 2/3 months
or earlier with frequent use.
Charcoal filters are not required
if you duct out.
If a hood is used on recycling mode
it will help reduce cooking odours
but will not reduce steam or
condensation. If you wish to reduce
odours, steam and condensation,
then you must duct out to expel
these to the outside.
Height above hotplates –
cooker hoods
Ideally the chimney hood should
be positioned between 650mm to
750mm above the hotplate surface.
Note that the chimney hood must
not be positioned lower than
650mm. If you are using a Britannia
back panel with ladle rack, the
height is pre-determined at 660mm.
Ducting
Try to plan your hood and cooker
onto an outside wall in the kitchen
if this is at all possible. By doing
this, you will minimise the length
of the ducting and maximise the
hood performance.
All Britannia hoods have high
extraction rates, therefore, using the
correct size ducting is of paramount
importance.
All Britannia hoods have outlets
which accept 150mm diameter. Do
not be tempted to use reducers and
fit 125mm or 100mm ducting as this
will dramatically reduce performance
and increase noise levels. Where
possible, do not use concertina type
expanding 150mm ducting.
Cooker Hoods
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