General planning notes
The aim of good ventilation system planning is to extract or filter the cooking vapours as quickly and as silent as possible.
To help you plan and install your cooking ventilation system correctly, here are a few important notes from our ventilation experts.
The cooking appliances
The choice of cooktop is the decisive influencing factor. Every cooktop are not
compatible with every ventilation appliances. The recommended Cooktop
Ventilation Combinations are available in the first pages from M&D in the Vario
cooktops and Cooktops chapters. In addition, if special Vario cooking appliances
are to be installed, which can be expected to produce a higher amount of cooking
vapours such as a Teppan Yaki, wok or electric grill, we recommend to install them,
if possible, in the centre of the cooktop configuration and not at the edge. More
over the cooktop(s) should not be wider than the hood.
The type of ventilation system
Every type of ventilation system has particular planning characteristics.
— For all the ventilation appliances installed above the cooktops, the minimum
distance between the worktop and the lower edge of the respective ventilation
appliance is specified in the planning instructions of the M&D and should be
respected. The extraction capacity reduces as the distance increases.
— For ceiling ventilation appliances, the maximum distance between the cooktop
and the ventilation appliance is 120 cm. In this case the maximum width of
cooktops combination is 100 cm. Adding a frame or a fume collector, the
maximum width of cooktops combination is 130 cm.
— The ceiling ventilation has to be handled as a room ventilation when distance to
cooktop is larger than 120 cm since the direct capture of vapours will be limited.
Please consider to consult an HVAC (Heating and ventilation air conditioning)
specialist.
— The maximum distance between two downdraft ventilation should not be more
than 80 cm (except for the CX482 due to the full surface induction). Cooktops
with a width of 60 cm and 80 cm (except the CX482), Vario cooktops like Vario
electric grill or Vario gas wok should be placed between two downdraft
ventilation.
The operation mode
All Gaggenau ventilation systems can be operated both in exhaust air mode and
air recirculation mode.
— In recirculation, please note that the Vario electric grill is not recommended.
The very hot cooking performances of the grill generate fumes and vapours
when meats or vegetables are placed on. Due to the high temperature of the
grill, the particles of fumes are thinner than these generated by another cooking
appliances. None of our current odour filters are able to catch and to filter
these grill fumes particles.
Please be aware that for EU countries, the table ventilation AL 400 122 is only
recommended in air recirculation due to legislation EU 66/2014.
— In air extraction mode, the extraction performance depends on the fan output,
and also significantly on the duct system. See the ducting paragraph.
Ducting equivalence
Gaggenau flat duct
Length 0.5 m
AD 857 015
0.5 m
Gaggenau flat duct
Length 1 m
AD 857 010
AD 854 010
1 m
AD 752 010
Gaggenau bend
AD 857 030
AD 854 030
3 m
AD 857 031
AD 854 031
AD 857 042
AD 854 032
Gaggenau
wall outlet
AD 750 054
AD 850 050
11 m
One way flap
00264765
(order as
spare part)
3 m
Remote fan unit
AR 401 142
7 m
Remote fan unit
AR 400 142
AR 400 143
0 m
AR 403 122
The fans
Gaggenau ventilation systems are equipped with particularly powerful fans
(200 series), or they can be combined with correspondingly powerful remote fan
units 400 series for exhaust air or air recirculation mode. These fans are designed
to minimise the pressure drop of the installation.
Thanks to the variety of remote fan units 400 series, the modular system allows for
installation in the cabinet, plinth, cellar, ceiling and in outdoor areas.
The ducting and accessory
To ensure the most effective catch of the vapours and fume, the installation
between the ventilation appliance and the extraction exhaust should be as short
and as straight as possible. This will ensure good extraction and acoustic
performances.
In order to facilitate the planning, for all Gaggenau ventilation appliances,
a recommended maximum ducting length is defined. This information is found
under the name Lmax.
For installation with a ducting equivalence longer than Lmax please reconsider to
change the ducting system to a straighter and shorter one.
For ventilation 400 series appliances, an additional blower in serie could be also a
solution.
To define the best ventilation solution, please contact your sales representative to
get advice from the Ventilation Service Gaggenau.
As every bend or accessory originate a pressure drop in the ducting system,
to estimate the global performance of the installation, each component has to be
summed based on the following equivalence.
Further information
Please observe the local applicable building regulations when configuring ventilation solutions.
Ventilation appliances
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