Pleasure in the air - to gaggenau

Pleasure in the air
Gaggenau ventilation and planning
Enjoy the difference
Also with ventilation
At Gaggenau we have been developing ventilation
appliances for private kitchens since 1960. Our work
is heavily based on professional standards. We also
combine experience gathered from professional practice with knowledge of the modern lifestyle of home
chefs. The result is uncompromising, absolutely flawless air extraction in kitchens that is custom-tailored
to the full spectrum of construction requirements.
Individual, quiet, effective.
In terms of quality, our top-class materials and complex
processing ensure that your every wish can come true.
And the performance of Gaggenau ventilation appliances is hard to surpass. High quality, quiet fans and
intelligent planning ensure that ambitious home chefs
enjoy fresh air when working in the kitchen.
The difference is Gaggenau.
Table of content
The product groups
The ventilation 400 series
The ventilation 200 series
The planning 14
The air requirement
The cooking appliances
The size and architecture of the kitchen
The type of ventilation appliances
The distance to the cooktop
The operation mode
The supporting factors
The filter systems
The remote fan unit
The air output
The performance characteristics
of the ventilation appliances
The duct system
The installation
General planning notes
Further information
The product groups
Kitchen vapours contain not only aromas and moisture,
but also tiny grease particles. Trapping these particles
is one of the biggest challenges for an effective ventilation appliance, along with eliminating odours. The fact
that kitchens are meanwhile increasingly being integrated into living areas in the home is one reason why
good ventilation appliances are more important today
than ever before. That is why in addition to searching
for better ideas for providing clean air, we also strive to
conceive more attractive ones.
Convincing technology, aesthetic perfection and high
quality materials sum up what Gaggenau has always
stood for: design, quality and tradition.
Sophisticated product design always considers the
effect within the room. Our eight different types of
ventilation offer an ideal solution for different spatial
conditions and personal preferences.
We differentiate here between the almost invisible systems – such as ceiling ventilation, downdraft ventilation
and table ventilation – and those specifically designed
to lend a design accent to a room. Almost every model
is available as an air extraction appliance or recirculation
version – all of which are highly effective.
The ventilation 400 series
The ventilation 400 series boasts a variety of design options and allows the focus to remain on what matters most
in the kitchen – on producing meals that are sure to impress. Its quiet and efficient technology is combined with
a sculptural design. Different models ensure the right technical fit for every spatial situation.
The ceiling ventilation is practically invisible. It can
be integrated into the ceiling of a room or positioned
unobtrusively in kitchen furniture. It consists of ventilation modules that can be combined in a host of
different ways to meet any individual wish and blend in
with any room. This is a solution that ensures maximum
headroom and field of vision, leaving no obstacles to
relaxed communication around the cooktop.
The wall-mounted hood is a classic, attractive ventilation
appliance for every type of kitchen. Designers like to
use it as a design element to focus attention directly
above the cooking area. Wall-mounted hoods are thus
also the perfect design solution where less space is
available and the room is not big enough to accommodate a kitchen island in the centre.
Ceiling ventilation AC 400
Wall-mounted hood AW 442
The table ventilation extracts cooking vapours where
they originate: right at the cooktop. This makes it magnificently effective and particularly suitable for very large
rooms and kitchen islands. The remote fan unit is concealed in the lower cabinet. It can also be installed in
the plinth, an adjacent room or on the exterior wall to
save space. Positioned behind the cooktop, the table
ventilation leaves ample space over the cooktop and
remains a background element thanks to its design.
This type of ventilation can be used as a highly effective
air recirculation solution or for air extraction.
The island hood plays a key role as a design element
in any cutting-edge kitchen. It extracts the air directly
above the cooktop, is available in stainless steel and its
free-floating installation makes it a distinctive part of
the kitchen’s architecture.
Table ventilation AL 400
The downdraft ventilation offers more than just invisibility. It extracts downwards from where it is integrated
in the worktop, whether directly next to or between
individual cooktops. The cooking vapours can thus
be extracted before they can become mixed with the
ambient air.
Island hood AI 442
Downdraft ventilation VL 414
The ventilation 200 series
The ventilation 200 series provides clean air in any kitchen - remarkably effective and offering compelling design
and functionality. Whether discreet like the downdraft ventilation or making a strong architectural statement like the
island hoods, the 200 series models have three things in common: they are powerful, individual and efficient. The
ventilation 200 series thus offers a model to suit every taste.
The ceiling ventilations in the striking 200 series offer
two options: either discreet integration into the architecture of the kitchen or directly installed on the ceiling.
Both ceiling ventilation options are operated by remote
control, featuring three power levels, plus an intensive
The downdraft ventilation is an interesting and highly
effective alternative to the classic hood. Integrated
alongside the cooktop, it removes vapours and odours
in air extraction or air reciruculation mode directly from
where they arise. For a clear line in the kitchen and free
head space, downdraft ventilation is the most subtle
solution – ideal for open-plan kitchens and cooking
Ceiling ventilation AC 231
Downdraft ventilation VL 040/VL 041
The flex induction cooktop with integrated ventilation
system provides automated flexibility. An impressive
80 cm wide, it offers four cooking zones that can be
combined into two larger ones. The extractor can be
set to self-adjust according to the atmosphere, automatically removing vapour and odours. This frees up
the user to concentrate on the more creative aspect of
Ceiling ventilation AC 250
Flex induction cooktop with integrated ventilation system CV 282
The ventilation 200 series
Classic lines, yet an eyecather, the wall-mounted hood
with its box design impresses with an efficient rim
extraction filter that is hidden behind a stainless steel
One of the first innovations that Gaggenau developed
for ventilation was the flat kitchen hood, which is still
very popular. It has the advantage of taking up very little
space because it is mounted inside the upper cabinet,
and, with the addition of the optional lowering frame, it
becomes completely concealed within. With a touch of
the handle bar, the screen automatically extends out.
Flat kitchen hood AF 210
Wall-mounted hood AW 240
The angled and vertical wall-mounted hoods are a
striking design statement in the three colours Gaggenau
Anthracite, Metallic and Silver, while their reduced
noise belies their extreme effectiveness. This lack of
noise and strong aesthetic does not compromise the
performance in any way. The ventilation is fully capable
of drawing in all the vapour you can create with three
electronically controlled power levels and one intensive
mode, made even more effective by simply opening the
glass screen a little. The hoods’ dimmable, ambient
lighting is offered in a choice of four Gaggenau hues:
Cool White, Neutral White, Warm White or Orange.
Angled wall-mounted hood AW 250
Vertical wall-mounted hood AW 250
The canopy extractors from Gaggenau are also a good
alternative whenever compact individual solutions are
required. Depending on the planning and requirements
for a specific project, they can be entirely enclosed by
furniture. Canopy extractors work very effectively and
with an extremely low level of noise.
Canopy extractor AC 200
The planning
The air output and air requirement are decisive factors
in the planning of a ventilation appliance. The air requirement depends primarily on the planned cooktop, the
space in question and the design and positioning of
the ventilation appliance. The air requirement must be
considered in relation to the corresponding air output
that a ventilation appliance can deliver, without taking
into account the effects of all ventilation appliance
This brochure will give you a detailed overview of the
different types of ventilation, as well as of individual
factors and general guidance on planning and safety.
You can use our planning tools to make your
calculations. Further information is available at
The air requirement
The air requirement
The aim of good ventilation appliance planning is to
ensure that the cooking vapours are extracted from the
kitchen area as thoroughly and quickly as possible. The
size of the kitchen and the corresponding air exchange
rate based on the room volume are often used as a
basis for planning. The air flow rate of the ventilation
appliance should correspond to the calculated room
The formula for optimal performance is: pleasant indoor
climate (no draught) at an air exchange (cleaning and
replacement) of 6–12 x room volume/h.
We recommend this method only when the distance
between the ventilation appliance and the cooktop is
more than 1.20 metres, i.e. for ceiling ventilation.
•In the air extraction mode, the air requirement for the
air exchange rate is calculated with the factor 10.
•If special cooking appliance such as grill, Teppan
Yaki, wok or deep fryer are used, you should calculate with the factor 12.
•In the air recirculation mode, the air requirement for
the air exchange rate is generally calculated with the
factor 12.
If the distance between the ventilation appliance and
the cooktop is less than 1.20 metres, the factors listed
below must be taken into account to ensure that most
of the cooking vapours are trapped as soon as they rise
from the cooktop:
•The cooking appliances
The cooking appliances
The selection of the cooktop is the decisive factor.
Different cooktops produce different types and quantities of cooking vapours. This is why the choice of cooktop is the key to determining the correct air output for
the ventilation appliance to be used. The wider the
cooktop, the greater the output of the ventilation appliance. The ventilation appliance must have sufficient
power reserves, especially when plans call for installing
special Vario cooking appliances such as the deep
fryer, Teppan Yaki, wok or grill. This is because a greater
quantity of cooking vapours can be expected with such
appliances. We therefore also recommend that these
special cooking appliances be installed in the middle
of the cooktop configuration and not on the outside
Example of a kitchen floor plan with the cooking position
installed against a wall
The size and architecture of the kitchen
Our first consideration is the size of the kitchen and
whether the room in question is enclosed or opens
onto the living space. A rule that applies here is: the
larger the room, the greater the movement of air which
increases the air requirement. This effect is intensified
in open kitchens, in kitchens with kitchen islands or
kitchen peninsulas and in kitchens whose users cook
frequently and with several other people. In other words,
the effect is different in enclosed kitchens with areas of
up to 10 m2 than in larger kitchens or in kitchens that
open onto living spaces. And we differentiate between
wall installations and islands or peninsulas.
Example of a kitchen floor plan with a kitchen island
•The size and architecture of the kitchen
•The type of ventilation appliance
•The distance to the cooktop
•The operation mode
•The supporting factors
•The remote fan units
On the following pages we’ll explain the individual
points in detail. Your Gaggenau contact will answer
any further questions you may have.
Example of a kitchen floor plan with a kitchen peninsula
The air requirement
The type of ventilation appliance
The distance to the cooktop
Each type of ventilation appliance has specific characteristics that affect the air requirement.
The minimum distance between the worktop and the
lower edge of the respective ventilation appliance is
specified in the planning instructions of our Models and
Dimensions and on our website at
It is imperative that this is adhered to. The extraction
capacity reduces as the distance increases. This must
also be considered during planning.
Ventilation appliances, such as downdraft ventilation
and table ventilation, extract air right at the cooktop.
This prevents rising cooking vapours from spreading
into the ambient air. As a rule, less air output is needed
with these types than with ventilation appliances where
the distance to the cooktop is 80 cm or more. One or
more downdraft ventilation appliances must be used
depending on the width of the cooktop.
Ceiling ventilation
Wall-mounted hood
For each downdraft ventilation one remote fan unit is
recommended. Maximum cooktop width between two
downdraft ventilations (VL): 60 cm.
For all other types of ventilation, the ventilation appliance selected should always be wider than the cooktop
below it. The rule of thumb here is: the greater the distance to the cooktop, the wider and more powerful the
chosen ventilation appliance. This is modified according to the size of the vapour collection area. After all,
cooking vapours always spread to the sides as they
Flex induction cooktop with integrated ventilation system
> 120 cm
< 120 cm
The distance of the ventilation appliance to the cooktop is
essential for the methods used to determine the air requirement
Table ventilation
Angled wall-mounted hood
Downdraft ventilation
Flat kitchen hood
Island hood
Canopy extractor
Up to a distance of approximately 1.20 m between the
ventilation appliance and the cooktop, it can be assumed
for proper planning that the majority of the resulting
cooking vapours will be extracted directly. In this case,
the choice of cooktop is the decisive factor for calculating the required air flow rate.
As the distance increases, it becomes more likely
that the cooking vapours will no longer be completely
captured by the ventilation appliance, but will also be
distributed in the room. In this case, the ventilation
appliance must ensure air exchange within the entire
room. Ventilation appliances with a follow-up function,
which continue to run even after cooking, are advantageous in this context. The air requirement for this should
be calculated using the room volume (see page 16).
The air requirement
The operation mode
The supporting factors
All Gaggenau ventilation appliances can be operated in
air extraction and air recirculation modes. Your choice
of ventilation appliance type depends entirely on
aesthetic preferences and installation conditions
in the room.
The Gaggenau rim extraction filter, an existing vapour
collection area and a wider ventilation appliance are
factors that reduce the air requirement. It is therefore
important for you to carefully consider your choice
of corresponding appliances at the planning stage, if
Air recirculation mode
In air recirculation mode, cooking vapours and grease
particles are purified by the grease filter and the air is
fed back into the room. The activated charcoal filter
removes the entrained odour particles prior to feeding
the air back into the room. It should be noted that the
additional activated charcoal filter leads to reduced air
performance in comparison with air extraction mode.
The larger the surface area of the activated charcoal
filter, the more comparable the ventilation appliance is
to an air extraction solution in terms of its air output and
noise level.
Air recirculation mode
Air extraction mode
Cooking vapours, grease particles and odorous substances are purified by the grease filter and fed into the
atmosphere. Sufficient supply air ensures optimal air
flow and therefore a good indoor climate. Underpressure allows fresh air to flow through open windows and
adjacent rooms. In air extraction mode, the actual air
performance is essentially dependent on the ducting in
addition to the fan power. Further safety-relevant information can be found on page 31.
Air extraction mode
Good to know
Irrespective of the operating mode, all Gaggenau
ventilation appliances initially guide kitchen vapours
through a grease filter, which retains grease particles
and protects the ventilation appliance and air pipe from
grease deposits. All grease filters from Gaggenau are
easy to remove and can be cleaned in the dishwasher.
Air recirculation mode
Air extraction mode
•Easy installation
•No heat loss in winter
•No loss of cooling in summer
•More effective air purification
•More power
•Slightly higher noise level
•Activated charcoal filter needs to be changed
•Heat loss in winter
•Loss of cooling in summer
•More complex installation
once or twice each year
•Activated charcoal filter reduces the air flow rate
by approximately 20 to 30 percent
The vapour collection area
For Gaggenau ceiling ventilations, when using canopy
extractors or the wall-mounted and island hoods
AW 442/AI 442 with integrated vapour collection area,
a vapour collection area at least 10 cm deep around
the filter surface helps to prevent the cooking vapours
from spreading under the ceiling or furniture cavity.
Vapour collection area
The air requirement
Metal grease filter
Filter systems: Grease filter
Filter systems: Odour filter
In all of Gaggenau’s ventilation appliances, the air
with grease and odour particles first passes through
a grease filter, which absorbs up to 97 percent of the
grease from the air. This allows it to protect the inside
of the ventilation appliance and the air extraction pipe
from deposits. It can be easily cleaned in the
Activated charcoal filter
For ventilation appliances in air recirculation mode,
the filter purifies the cooking vapours before the air is
released back into the kitchen.
Metal grease filter
Grease separation is between 83 and 95 percent.
The filter can be easily removed for cleaning.
Baffle filter
The Gaggenau baffle filters of the 400 series are included in both the wall and the island hoods. Maximum
space is achieved for ensuring the efficiency of the
vapour collection area thanks to the slanted position
of the filter. The filter also generates excellent results
in absorbing grease. The baffle filter comprises three
parts that can be easily taken apart and cleaned in
the dishwasher. Grease absorption is approximately
86 to 95 percent.
Baffle filter
Rim extraction filter
Rim extraction filter
The full-surface metal grease filter with its integrated
stainless steel screen creates a more peaceful appearance. Grease absorption of 87 to 97 percent corresponds to the standard for metal grease filters. Condensate formation is reduced due to the flow-optimised
filter system. The filter can be removed as a unit and
cleaned in the dishwasher.
Activated charcoal filter with increased surface
In air recirulation mode, the activated charcoal filter
absorbs the odour components immediately thanks to
the increased surface and ensures an odour reduction
of 95 percent. It is especially indicated with the preparation of fish and seafood dishes due to its special
Activated charcoal filter
The activated charcoal filter has an extended change
intervall of up to 30 times. It is regenerable in the oven
at 200 °C.
Activated charcoal filter with increased surface 400 series
Activated charcoal filter with increased surface 200 series
Regenerable activated charcoal filter AA 270
The air requirement
Remote fan unit AR 400 142
External remote fan units for 400 series
External remote fan units for 200 series
Powerful fan module with highly efficient direct current
motor (BLDC) to combine the motorless units of the
400 series. Thanks to the variety of remote fan units, the
modular system allows for installation in the cabinet,
plinth, cellar, ceiling and in outdoor areas.
Powerful remote fan unit to combine with the motorless
downdraft ventilation VL 040/VL 041 of the 200 series.
Remote fan unit AR 400 142
The remote fan unit AR 400 142 can alternatively be
used for cabinet installation in an adjoining room such
as a cellar. Installation at home. Air extraction mode.
Remote fan unit AR 400 143
The remote fan unit AR 400 143 is suitable for spacesaving installation; AW 442/AI 442 is suitable for chimney installation. Air extraction mode/air recirculation
mode with accessories.
Remote fan unit AR 400 143
Remote fan unit AR 401 142
Installation in outdoor areas makes it possible to
reduce noise levels in the kitchen. Installation on the
outer wall. Air extraction mode.
Remote fan unit AR 403 122
For compact and space-saving installation in a plinth
of at least 10 cm in height. Installation in the plinth.
Air extraction mode.
Remote fan unit AR 401 142
Remote fan unit AR 403 122
Remote fan unit AR 413 122
Remote fan unit AR 413 122
For compact and space-saving installation in a plinth
of at least 10 cm in height. Installation in the plinth.
Air recirculation mode with integrated filter.
Remote fan unit AR 403 121
For compact and space-saving installation in a plinth
of at least 10 cm in height. Installation in the plinth.
Air extraction mode.
Remote fan unit AR 413 121
For compact and space-saving installation in a plinth
of at least 10 cm in height. Installation in the plinth.
Air recirculation mode with integrated filter.
Remote fan unit AR 403 121
Remote fan unit AR 413 121
Integrated remote fan unit for 200 series
The fan is integrated in the chimney for the hoods of
the 200 series.
The remote fan unit of the flex induction cooktop with
integrated ventilation system is placed directly under
the appliance.
Integrated fan
Integrated fan CV 282
The air output
The air output
The air output of the entire ventilation appliances must
be specified to correspond to the air requirement. The
following factors affect the air output:
•The performance characteristics of the chosen
ventilation appliances.
•The duct system.
•The installation.
In addition, it is advisable to plan for sufficient power
reserves to ensure that the ventilation appliances do
not have to constantly work at the highest power level.
This helps to reduce noise while simultaneously
improving energy efficiency.
On the following pages we will explain the individual
factors in detail. On our website we also provide a
planning tool – “Rodun” – for calculating the air output.
The performance characteristics of the ventilation
The performance characteristics of a ventilation
appliance are the result of optimal coordination of the
following factors: the construction itself, the filter that
is used and the fan. Gaggenau ventilation appliances
are equipped with very powerful fans, or they can be
combined with correspondingly powerful remote fan
units for air extraction or air recirculation. These fans
are also extremely resistant to pressure. They overcome possible pressure losses in a duct system and
work very effectively at a low noise level.
The fan output is supported by features, such as the
rim extraction or vapour collection area, which boost
the effectiveness of the ventilation appliances.
The duct system
Intelligently selecting and installing the duct system not
only has a very positive effect on the output of the
ventilation appliances; it also minimises the noise
generated. It is therefore decisive for the efficiency of
the entire ventilation appliance. This applies especially
to air extraction solutions, but also to air recirculation
solutions with external remote fan units. A good
guideline here is: the duct diameter should be as large
and constant as possible, while the ducting should be
as short and straight as possible. The wall outlet must
correspond to the duct diameter.
Further information can be found at
Ideal piping meets the following criteria:
•Settling section of 30 cm after the exhaust opening,
only then attach the necessary elbows (see pages
29 to 30).
•Additional elbow for pipe bends.
•Keep piping as short as possible.
•Aim for as large a pipe diameter as possible.
•Avoid cross-section narrowing. If cross-section
narrowing is unavoidable, then taper as late as
•Smooth interior pipe surface.
The seven main factors responsible for loss of extraction rate and a simultaneous noise increase are:
1 Bend immediately after exhaust opening
2 Narrowing of the cross-section
3 Selected pipe diameter is too small
4 Use of pipe elbows
5 Piping routes are too long
6 Wall boxes
7 Insufficient air supply
•Wall boxes with fins, no close-mesh grid, low
•Guarantee air supply.
Further recommendations:
•Please note the slightly sloping installation of the air
extraction duct with an incline of 1° to avoid
condensation return flow.
•In the event of junctions in an exhaust shaft, place the
pipes in the direction of flow as much as possible.
The air output
The duct type
In Gaggenau’s accessories catalogue, customers
can select the type of duct appropriate to their needs,
whether aluflex duct, round duct or a flat duct system.
Depending on the duct type, they can choose from
the nominal sizes DN 125, DN 150 and DN 200. For
maximum output with minimal noise, the diameter
should always be as large as possible.
Smooth pipe: ideal
For straight ducting, the use of plastic or metal ducts
with smooth, level inner surfaces is recommended.
These enable a laminar flow of air during extraction,
without air turbulence.
For sections that are not straight and for bends, flexible
aluminium ducts are preferred because they make it
possible to avoid hard edges. The distinct design with
special guidance fins in elbows and connectors allows
for a very low height for large nominal diameters and
therefore ensures highly efficient air flow.
Aluflex pipe: good
Spiral hose: bad
Gaggenau flat duct system with guidance fins: highly efficient
even when space is limited and bends are present
Where space limitations are a concern, the first choice
is the Gaggenau flat duct system. This also applies in
situations where there are many bends. In addition to
the flat duct system, there are bends with guidance
We strongly advise against using other flat ducts due
to the high loss of power in pipe elbows, channel corners and connectors. As a general rule, it is not advisable to use spiral or corrugated hoses. Comparatively
speaking, they exhibit the poorest flow conditions and
also tend to flutter, which leads to noise production.
The duct diameter
It is also important to consider the duct diameter. In
principle, the nominal size of the duct should equal the
size of the ventilation air outlet. Generally, the larger the
diameter, the fewer the output losses and the lower the
noise level. Even with a hood whose connecting pieces
have a nominal size of DN 150, it is advantageous to
use ducting with a nominal size of DN 200 for longer
stretches in order to minimise losses in the long air
The installation
The choice of the appropriate duct type with the optimal nominal size and careful installation are decisive
factors that influence the efficiency of the ventilation
appliance. In general, the ducting should be kept as
short as possible and have few bends and a large
Large duct diameters result in a lower flow velocity
and thus far less turbulence. On the whole, there is
an audible reduction in the noise generated by the
ventilation appliance. Narrowing the cross-section,
on the other hand, creates air turbulence, increases
resistance and has a negative effect on the noise level
and output of the ventilation appliance.
A straight stretch of ducting measuring approximately
30 cm in length must be installed immediately following
either the air outlet opening of the ventilation appliance
or the remote fan unit, in order to allow the laminar flow
of the extracted air. Bends should only be installed
after this stretch.
Bends should always be laid out with the greatest
possible radius because air turbulence forms at sharp
turns/curves, which is also where air flow breakaway
can happen. Bends that allow good air flow can be
achieved with flexible aluminium ducts or our flat duct
Any narrowing of the cross-section should be avoided
The section of the pipe downstream of the air outlet should be
at least 30 cm long
Round pipe elbow: flow-enhancing
Ducts with diameters of less than 125 mm (DN 125)
are not recommended because they have a very negative effect on the ventilation output and significantly
increase noise.
Angular pipe elbow: not flow-enhancing
The air output
When connecting secondary channels to a main duct,
attention must be paid to oblique angles. The ducts
should also be positioned obliquely if possible when
they open into an air extraction shaft.
When connecting several ventilation appliances to
one common chimney, the cross-section of the main
duct must be laid out to correspond to the number of
Air extraction ducts that run through unheated rooms
should be well insulated to prevent condensation
A condensation separator should be installed at the
lower end of vertical stretches of ducting. Horizontal
air extraction ducts should have a slope of at least 1°
so that they can lead any condensed water away from
the ventilation appliance. The condensation can either
be channelled to an appropriate spot outdoors or
collected in a reservoir where it can evaporate.
Air inlets and outlets should be as free of wind
pressure as possible.
Very bad
In the event of junctions in the exhaust shaft pipe, place in the
direction of flow as much as possible
The sound damper
In order to reduce noise pollution in the cooking area,
the fan can be fitted in an adjoining service room or
outside of the building. The noise emissions of an
external fan can indeed have an effect along the air
extraction duct and against the flow direction right
through to the ventilation appliance. To reduce noise
transmission, a sound damper should be installed on
an external fan. A sound damper can also be installed
in the pipe system to reduce noise. This increases
the flow resistance in the pipe system.
The wall outlet
Suitable wall outlets are available for clean, efficient
and discreet conveyance of the piping through exterior
walls. The passage should always be greater than, or
equal to, the nominal diameter of the pipe type.
External fan
General planning notes ‫ ׀‬Further information
General planning notes
Important factors when planning a ventilation appliance
include personal taste, specific architectural conditions
and safety considerations. We will discuss these points
in greater detail in the next section.
The design
In visual terms, there are basically two categories of
ventilation: visible and invisible. The preferred version
depends entirely on personal taste, because Gaggenau
offers outstanding systems of both kinds.
If the visible variant is chosen, the ventilation appliance
becomes an important design element in the room.
Gaggenau ventilation appliances have long since been
setting standards in this area with designs that are
deliberately sculptural and have won a large number
of awards. Prime examples include the timeless
AW 442/AI 442 as well as the wall and island hoods
AW 27*/AW 25*/AW 240/AI 240.
By contrast, the AC 400 and AC 250 ceiling ventilations, which are either discreetly integrated into the
architecture of the kitchen or directly installed on the
ceiling, work almost invisibly. Equally invisible are flat
kitchen hoods and canopy extractors which are integrated into the cabinet. Or the downdraft ventilations
VL 414/VL 040/VL 041 which are integrated directly
into the worktop in between or next to cooking appliances, as well as the CV 282 flex induction cooktop
with integrated ventilation system.
The AL 400 table ventilation remains in the background,
or disappears completely into the worktop when not in
use, leaving the space above the cooktop free.
Architectural conditions
Architectural conditions, such as room layout, wall
shape or building materials, often impose limits on the
choice of ventilation appliance and the operation mode.
In order to avoid such limitations, it is worth making a
decision early on about the type and operation mode of
the ventilation appliance.
•Low-energy or passive house: only a recirculation
variant is possible in this case, because otherwise
the energy balance of the house would be negatively
•Long air extraction route: our planning tool helps
you to determine whether the performance losses in
the planned duct system would be too great for the
volume of fresh air that is needed and, if so, what
changes in the kitchen planning process solve the
Further information
problem, or whether a recirculation system would be
more suitable.
•Open fireplace: if there is a working open fireplace in
the kitchen or an adjacent room, any planned ventilation appliances must ensure a sufficient supply of
fresh air.
•Window contact switch: the hood only works if the
window is open.
•A sloping ceiling or a cooktop directly in front of a
window: installation of table or downdraft ventilation
is recommended in this situation.
Further planning instructions and planning examples
can be found in the Models and Dimensions.
Aspects relating to safety for air extraction mode
Safety and fire protection must have top priority in all
planning activities and regulations currently in force
must always be complied with.
An adequate supply of fresh air must be ensured,
especially in rooms where a fireplace is being operated
with gas, oil or solid fuel. This is because the hood
could divert the oxygen that the fireplace needs for
combustion and increase the spread of exhaust gases
throughout the room.
In addition, some countries require the installation of
a standard window contact switch, which allows the
ventilation appliance to be used only if a window is
open. We strongly recommend installation of such a
switch in any case. This risk does not arise if an air
recirculation system is used.
Extracted air must not be channelled into any currently
working flue or chimney. The air must also not be channelled into any shaft that serves to ventilate rooms with
The minimum distance between the worktop and the
bottom edge of the ventilation appliance is listed in the
planning instructions of our Models and Dimensions
and on our website at This minimum distance must always be observed. If the distance
exceeds this minimum, the air output is reduced. This
should also be kept in mind during planning.
The Gaggenau Models and Dimensions
This catalogue includes the technical specifications
of our ventilation appliances, planning and configuration instructions and an overview of our range of
You can find further information about Gaggenau
online at
Activated charcoal filter
This filter picks up and captures odour particles. In the
case of air recirculation systems, the activated charcoal
filter cleanses cooking vapours of odours before the air
is redirected into the kitchen. It is especially indicated
with the preparation of fish and seafood dishes due to
its special impregnation. In order to keep the ventilation
appliance effective, activated charcoal filters should be
replaced about once a year, depending on individual
cooking patterns.
Air extraction/Air recirculation
All Gaggenau ventilation appliances can be used for air
extraction or air recirculation. In both cases, the air that
is full of grease and odour particles first passes
through a grease filter that protects the inside of the
exhaust air duct against deposits.
Air extraction
In the air extraction version, the previously cleaned air
is conducted through the wall and expelled outdoors or
into a ventilation shaft. Air extraction systems operate
by means of a constant exchange of air. The volume of
air that is removed from the room must be replaced
with the same volume of fresh air. An air extraction
system is efficient provided the following conditions
have been met:
A. The exhaust air must be removed as directly as
possible, without any great deviations. (See pages 27
and 29, duct system and installation)
B. An adequate supply of fresh air from outside must
be ensured. The necessary ventilation opening should
be located as close to the ceiling as possible and, if
feasible, on the side of the room opposite the hood.
The distance between the ventilation opening and the
hood should be at least 1 metre in order to prevent
gusts of air over the cooktop in the event of strong
Air recirculation
In the air recirculation version, the odour particles are
captured by an additional activated charcoal filter so
that only odourless air is routed back into the kitchen.
Ventilation appliances in air recirculation mode have
a higher energy efficiency level than air extraction
systems. This is because heated air stays in the room
in winter and, conversely, cool air stays in the room in
summer. In addition, they are generally easier to install,
because in most cases there is no need for an
extensive duct system.
As the surface area of the activated charcoal filter
increases, the power and noise development of an air
recirculation system becomes comparable to that of an
air extraction system. The only thing an air recirculation
solution does not do is remove humidity from the
kitchen. If an air recirculation system is used for room
ventilation (the distance between the ventilation
appliance and the cooktop must be greater than 1.20
metres), special cooking appliances, such as the grill,
Teppan Yaki, wok or deep fryer, should not be installed.
Ambient lighting
The dimmable ambient lighting offers background
lighting that can be individually set. It is provided in
a choice of four predefined Gaggenau hues: Cool
White, Neutral White, Warm White or Orange.
Automatic screen extension
With a touch of the handle bar, the screen of the
flat kitchen hood automatically extends out to its end
Automatic sensor
The power level is selected automatically according to
vapour generation and shuts off if there are no longer
any odours present.
Ceiling collar
For each type of duct there is an appropriate ceiling
collar. Such collars also hide small gaps in ceilings that
are not quite horizontal and have a slope of 1-2°. With
the help of a ceiling collar, one-piece special ducts can
be custom-installed even at height.
Condensation trap
A condensation trap should be installed at the
lower end of long, vertical air extraction ducts. The
condensation trap collects condensed water in a
container above the ventilation appliance, where it
Cooktop-based ventilation control
The cooktop based ventilation control allows for a
control of the most relevant ventilation functions (e.g.
power levels or workplace illumination) via the cooktop.
This is made thanks to a WLAN module situated in
both cooktop and ventilation. No internet connection
is necessary.
Grease filter
Intensive mode
As with all Gaggenau ventilation appliances, the air
containing grease and odour particles first passes
through a grease filter, which removes up to 96 per
cent of the grease from the air. This prevents any
deposits forming on the inside of the hood or
ventilation pipes.
Three power settings and an intensive mode can be
activated via individual control buttons on the ventilation
appliances. Depending on the particular model and
setting, the intensive mode automatically reverts to the
previously selected power setting after five to ten
minutes of operation.
Baffle filter
The Gaggenau baffle filters of the 400 series are
included in both the wall and the island hood. Maximum
space is achieved for ensuring the efficiency of the
vapour collection area thanks to the slanted position of
the filter. The filter also generates excellent results in
absorbing grease (approximately 86 to 95 percent).
Interval ventilation
Metal grease filter
The filter can be easily removed for cleaning in the
Rim extraction filter
The full-width metal grease filter with its integrated
stainless steel cover ensures a more understated look.
The grease absorption of 87 to 97 percent is equivalent
to that of a metal grease filter. Less condensation is
formed thanks to the flow-optimised filter system. The
filter can be removed as a unit and cleaned in the
Grease filter saturation indicator
A signal on the control panel reminds the user when it
is time to clean the grease filter. In the case of ceiling
ventilation, an acoustic signal sounds every time the
appliance is switched off. Soiled filters lose their effectiveness and raise the noise level of the ventilation
When interval ventilation is activated, the ventilation
appliance automatically switches back to the previously
selected power level automatically for six minutes in
each hour of operation. This enables extraction of stale
air from the room at regular intervals, even during the
night – after parties, for example, or when nobody is
at home for extended periods. This is recommended
especially after intensive cooking or in kitchens without windows. The ventilation appliance switches on
automatically every hour to purify the air in the room.
LED lighting
You can set the brightness yourself on the cooktop
thanks to dimmable LED lighting – depending on
whether you want to enjoy subtle lighting in the kitchen
or need perfect illumination on your cooktop. It is
durable and energy-saving.
Lowering frame
Flat kitchend hoods become completely concealed in
the upper cabinet thanks to their patented lowering
frame. With a touch of the handle bar, the hood is softly
lowered and the vapour screen extends out. After use,
the hood is pushed back in its upper position.
Motorless extractor hood
Halogen light
See remote fan unit.
The uniform cooktop lighting of the ventilation appliance is switched on and off by means of automatic and
gentle brightening or fading out. The illumination can
be dimmed manually from its maximum strength for
cooking or to create atmospheric background lighting.
Noise generation
Infrared remote control
All of the AC 400 ceiling ventilation’s functions,
from the desired power level to the lighting, can be
conveniently operated using the infrared remote
The two main sources of noise in a ventilation appliance are the motor and the air flow. Motor noise is
generated by the operation of the extractor at the
necessary rpm. Thanks to the type of motor control
system and the form of the ventilator and the housing,
Gaggenau ventilation appliances generate motor
noise practically only when they are being operated at
level 1. And even then the noise is barely perceptible.
Different conditions apply to the volume of the noise
generated by the air flow. The air flow noise becomes
louder with increasing air output. This noise can be
minimised using the largest possible duct diameters
and appropriate duct types. The value of a specific
Gaggenau feature, such as the vapour collection area,
is also evident here, as under some circumstances
the appliance can be operated at a lower power level.
Noise level
The noise level is a value measured and calculated
under laboratory conditions and is specified in
dB(A) re1pW. This specification is intended solely for
the purpose of comparing information in the catalogues
from various manufacturers and cannot be determined
in the same way in a real kitchen situation.
Sound dampers
When installing ventilation appliances with separate
remote fan units, noise can be reduced by installing
a sound damper duct between the two appliances.
The sound damper is most effective when installed in
a curved arrangement.
Vapour collection area
One-way flap
For Gaggenau ceiling ventilation, when using canopy
extractors or wall-mounted and island hoods AW 442/
AI 442 with an integrated vapour collection area, a
vapour collection area of at least 10 cm in depth around
the filter surface helps to reduce the spread of cooking
vapour under the cover or the furniture cavity.
See wall outlets/telescopic ducts.
Wall outlets/telescopic ducts
Pipe connector/adapter
At the point where the air extraction ducts open to the
outdoors, these louvered screens prevent water and
wind from getting into the exhaust air duct and an
integrated one-way flap prevents cold air from entering.
A drip edge prevents dirt from accumulating on the
building facade. Telescopic ducts can be adjusted in
line with the thickness of the outer wall. Their crosssections should correspond to those of the exhaust air
duct. Telescopic ducts and air extraction ducts should
never lead out to the side of the building most exposed
to the elements. The back pressure exerted by wind
and rain can have an adverse effect on the functioning
of the ventilation appliances.
Connectors are available for all commonly used
nominal pipe sizes to connect pipes with the same
or different diameter.
Remote fan unit/motorless ventilation appliance
If the construction design permits, installation of a
motorless ventilation appliance together with an external
fan is recommended. The fan can be mounted either
outside the building or in an adjacent space such as an
attic or a cellar. It can also be installed in a lower cabinet.
This has the advantage of keeping motor noise out of
the kitchen or at least dampening it. Furthermore, more
power is available, depending on the ventilation type
VL 414/VL 040/VL 041 that is used. The fan is operated
via the ventilation appliance controls.
Rim extraction filter
See grease filter.
Run-on function
Just the thing for effective room ventilation. Once
activated, the function ensures that the ventilation
appliance runs on for up to ten minutes after use on
any setting, before automatically switching itself off.
Switching on the ventilation appliance prior to cooking
is recommended as is allowing it to run for some time
after cooking is over.
Further information as well as the addresses of
our showrooms and dealers can be found at
© Copyright by
Gaggenau Hausgeräte GmbH
P.O. Box 830101
81701 Munich
Edition 2017
The data and facts contained herein are current
as of May 2017. Gaggenau reserves the right to
implement technical modifications that serve the
purpose of progress.
The appliances are for household use only. BSH Hausgeräte GmbH, P.O. Box 830101, 81701 Munich, Germany
The difference is Gaggenau.