TZ-Silenzio_img_04psd.png
VAV terminal unit Type TZ-Silenzio

Easyregler-Compactregler_img_01_2020_01_DE__6_psd.psd.link
Easy controller, Compact controller

Easy controller, Compact controller

TU-ELAB-Regler_img_01_2020_01_DEpsd.psd.link

TROX UNIVERSAL controller,

TROX LABCONTROL controller

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Rectangular connections on both ends

Rectangular connections on both ends

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For all upstream conditions

For all upstream conditions

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Tested to VDI 6022

Tested to VDI 6022

TZ-Silenzio_img_04psd.png
Easyregler-Compactregler_img_01_2020_01_DE__6_psd.psd.link
TU-ELAB-Regler_img_01_2020_01_DEpsd.psd.link
TZ-Silenzio_img_06psd.png
TZ-Silenzio_gc_07ai.ai.link
00073144_0ai.ai.link

TZ-SILENZIO  

For supply air systems with demanding acoustic requirements and low airflow velocities

 


Rectangular VAV terminal units for the supply air control in buildings with variable air volume systems, demanding acoustic requirements and low airflow velocities

  • Highly effective integral attenuator
  • Optimised for airflow velocities of 0.7 – approx. 7 m/s
  • High control accuracy, even in case of unfavourable upstream conditions
  • Compact construction with rectangular connections on both ends
  • Electronic control components for different applications (Easy, Compact, Universal, and LABCONTROL)
  • Closed blade air leakage to EN 1751, Class 4
  • Casing leakage to EN 1751, Class C


Optional equipment and accessories

  • Acoustic cladding for the reduction of case-radiated noise
  • Secondary silencer Type TS for the reduction of air-regenerated noise
  • Hot water heat exchanger of Type WT for reheating the airflow

 


 


 

General Information

Application
  • Rectangular VAV terminal units for use in ventilation and air conditioning systems
  • For controlling, restricting or shutting off airflows in supply air systems with low velocities and demanding acoustic requirements
  • Integral attenuator
  • Closed-loop volume flow control using an external power supply
  • For variable or constant volume flow systems
  • Shut-off by means of switching (by others)
  • Can also be used for differential pressure control with suitable control components


Special features
  • Hygiene tested and certified
  • Direct connection to ductwork
  • Factory set-up or programming and aerodynamic function testing
  • Parameters can also later be set on the control component; additional adjustment device may be necessary


Nominal sizes

  • 125, 160, 200, 250, 315


Variants
  • TZ-Silenzio: supply air unit
  • TZ-Silenzio-D: supply air unit with acoustic cladding
  • Units with acoustic cladding and/or secondary silencer Type TS for very demanding acoustic requirements
  • Acoustic cladding cannot be retrofitted


Parts and characteristics
  • Ready-to-commission unit which consists of mechanical parts and control components
  • Averaging effective pressure sensor for volume flow rate measurement
  • Damper blade
  • Integral attenuator
  • Factory assembled control components complete with wiring and tubing
  • Aerodynamic functional testing on a special test rig prior to shipping of each unit
  • Set-up data is given on a label or volume flow rate scale affixed to the unit
  • High control accuracy, even in case of unfavourable upstream conditions


Attachments
  • Easy controller: compact unit with potentiometers
  • Compact controller: compact unit consisting of controller with potentiometers, effective pressure transducer and actuator
  • Universal controller: controller, effective pressure transducer and actuators for special applications
  • LABCONTROL: Control components for air management systems



Useful additions
  • Secondary silencer Type TS
  • Heat exchanger Type WT


Construction features
  • Rectangular casing
  • Replaceable seals
  • Flanges on both ends for the connection to ductwork
  • Position of the damper blade indicated externally at shaft extension
  • Thermal and acoustic insulation (lining)


Materials and surfaces

  • Casing made of galvanised sheet steel
  • Damper blade and effective pressure sensor made of aluminium
  • Lining is mineral wool
  • Plastic plain bearings
  • Shaft and linkage: galvanised steel

Variant with acoustic cladding (-D)
  • Acoustic cladding made of galvanised sheet steel
  • Lining is mineral wool
  • Rubber elements for the insulation of structure-borne noise

Mineral wool
  • To EN 13501, fire rating class A1, non-combustible
  • RAL quality mark RAL-GZ 388
  • Non-hazardous to health thanks to being highly biosoluble in accordance with the Ordinance on Hazardous Substances and Note Q of the European Directive (EC) No. 1272/2008
  • Faced with glass fibre fabric as a protection against erosion from airflow velocities of up to 20 m/s
  • Inert to fungal and bacterial growth


Standards and guidelines

Fulfils the hygiene requirements of
  • EN 16798, Part 3
  • VDI 6022, Sheet 1
  • DIN 1946, Part 4
  • For other applicable standards and guidelines refer to the hygiene certificate

Casing leakage
  • EN 1751, Class C

Closed blade air leakage
  • EN 1751, Class 4
  • Meets the increased requirements of DIN 1946, Part 4, with regard to the acceptable closed blade air leakage

Maintenance
  • Maintenance-free as construction and materials are not subject to wear

Technical information

Function, Technical data, Specification text, Order codes, Related products

  • Function
  • TECHNICAL DATA
  • SPECIFICATION TEXT
  • ORDER CODES
  • RELATED PRODUCTS
Schematic illustration of the TZ-Silenzio TZ-Silenzio_gc_04ai.png

① Integral sound attenuator

② Effective pressure sensor

③ Control components, e.g. an Easy controller

④ Damper blade with seal


The VAV terminal unit is fitted with an effective pressure sensor for measuring the volume flow rate.

The control components (attachments) include an effective pressure transducer that transforms the effective pressure into an electric signal, a controller, and an actuator; the control functions can be achieved with an Easy controller, with a Compact controller, or with individual components (Universal).

For most applications, the setpoint value comes from a room temperature controller.

The controller compares the actual value with the setpoint value and alters the control signal of the actuator if there is a difference between the two values.

An integral attenuator reduces the noise that is created by the restriction of the airflow.

 


Nominal sizes125 – 315
Volume flow rate range

27 – 1093 l/s or 95 – 3937 m³/h


Volume flow rate control range (unit with dynamic effective pressure measurement)Approx. 10 – 100 % of the nominal volume flow rate
Minimum differential pressure

Up to 106 Pa (without secondary silencer)


Maximum differential pressure1000 Pa
Operating temperature10 to 50 °C

Specification text

Rectangular VAV terminal units for variable and constant air volume systems, for demanding acoustic requirements, suitable for supply air, available in 5 nominal sizes. High control accuracy even in case of unfavourable upstream conditions. Ready-to-commission unit which consists of the mechanical parts and the electronic control components. Each unit contains an averaging effective pressure sensor for volume flow rate measurement, a damper blade, and an integral sound attenuator. Factory-assembled control components complete with wiring and tubing. Effective pressure sensor with 3 mm measuring holes, hence resistant to contamination. Casing with acoustic and thermal insulation. Position of the damper blade indicated externally at shaft extension. The damper blade is factory set to open position, which allows a ventilation airflow even without control; this does not apply to variants with defined safe position NC (normally closed). Meets the hygiene requirements of EN 16798, Part 3, of VDI 6022, Sheet 1, and of DIN 1946, Part 4.


Special features
  • Hygiene tested and certified
  • Direct connection to ductwork
  • Factory set-up or programming and aerodynamic function testing
  • Parameters can also later be set on the control component; additional adjustment device may be necessary


Materials and surfaces
  • Casing made of galvanised sheet steel
  • Damper blade and differential pressure sensor made of aluminium
  • Lining is mineral wool
  • Plastic plain bearings

Mineral wool:
  • To EN 13501, fire rating Class A1, non-combustible
  • RAL quality mark RAL-GZ 388
  • Non-hazardous to health thanks to being highly biosoluble in accordance with the Ordinance on Hazardous Substances and Note Q of the European Directive (EC) No. 1272/2008
  • Faced with glass fibre fabric as protection against erosion from airflow velocities of up to 20 m/s
  • Inert to fungal and bacterial growth

Connection type

  • Flanges on both sides, suitable for duct connection


Technical data
  • Nominal sizes: 125 – 315
  • Volume flow rate range: 27 – 872 l/s or 95 – 3142 m³/h
  • Minimum differential pressure: up to 106 Pa (without secondary silencer)
  • Maximum differential pressure: 1000 Pa
  • Closed blade air leakage to EN 1751, Class 4
  • Casing leakage to EN 1751, Class C


Specification text for attachment
Variable volume flow control with electronic Easy controller to connect an external control signal; actual value signal can be integrated into the central BMS.

  • Supply voltage 24 V AC/DC
  • Signal voltages 0 – 10 V DC
  • Possible override controls with external switches using volt-free contacts: CLOSED, OPEN, qᵥmin and qᵥmax
  • Potentiometers with percentage scales to set the volume flow rates qᵥmin and qᵥmax without adjustment device
  • The actual value signal relates to the nominal volume flow rate such that commissioning and subsequent adjustment are simplified
  • Volume flow rate control range: approx. 10 – 100 % of the nominal volume flow rate
  • Clearly visible external indicator light for signalling the functions: set, not set, and power failure
  • Electrical connections with screw terminals
  • Double terminals for looping the supply voltage, i.e. for the simple connection of voltage transmission to the next controller


Sizing data
  • qᵥ _______________________ [m³/h]
  • Δpst _______________________[Pa]

Air-regenerated noise
  • LPA _______________________[dB(A)]

Case-radiated noise
  • LPA _______________________[dB(A)]



Equivalence criteria

  • Declaration of hygiene conformity in accordance with VDI 6022, part 1 (01/2018), ÖNORM H 6020 (02/2007) and ÖNORM H 6021 (09/2003)
  • Setting of the volume flow rates without an adjustment device using Vmin- and Vmax potentiometers
  • Electrical connections with screw terminals, no junction box required
  • Aerodynamic functional testing of each volume flow controller on a test rig before shipping (test result on a sticker on the controller)
  • No upstream section required
  • Acoustic data to ÖNORM EN ISO 5135:1999
  • Maximum control deviation of 5 % at qvmax, without upstream section


Order code for volume flow control (with Easy attachment)
TZ-SilenzioD / 200 / Easy
||||
1234
1 Type
TZ-Silenzio VAV terminal unit, supply air
 
2 Acoustic cladding
No entry: None
D With acoustic cladding
 
3 Nominal size
125, 160, 200, 250, 315
 
4 Attachments (control component)
Easy Volume flow controller, dynamic, analogue interface, setting of qvmin and qvmax with potentiometers


Order example: TZ–Silenzio/125/Easy

Acoustic cladding None
Nominal size 125
Attachments (control component) Easy volume flow controller, dynamic, setting of qᵥmin and qᵥmax with potentiometers


Order code for volume flow control (with VARYCONTROL attachment)

TZ-SilenzioD / 200 / XB4 / V0 / 400 -– 1200 [m³/h] / NO
||||||||
12346789
1 Type
TZ-Silenzio VAV terminal unit, supply air
 
2 Acoustic cladding
No entry: None
D With acoustic cladding
 
3 Nominal size
125, 160, 200, 250, 315
 
4 Attachments (control component)
For example
BC0 Compact controller
XB4 Universal controller (VARYCONTROL)
 
6 Operating mode
F Constant value (one setpoint value)
V Variable (setpoint value range)
 
7 Signal voltage range

For the actual and setpoint value signals
0 0 – 10 V DC
2 2 – 10 V DC
 
8 Operating values for factory setting
Volume flow rates [m³/h or l/s] 
qᵥconst (with operating mode F)
qᵥmin – qᵥmax (with operating mode V)
 
9 Damper blade position
Only with spring return actuators
NO Power off to OPEN
NC Power off to CLOSED

Order example: TZ–Silenzio/200/BC0/V0/300–1200 m³/h

Acoustic claddingNone
Nominal size200
Attachments (control component)Compact controller, dynamic transducer, analogue or MP bus interface
Operating modeVariable operation qᵥmin – qᵥmax
Signal voltage range0 – 10 V DC
Operating valuesqᵥmin = 300 m³/h
qᵥmax = 1200 m³/h


Order code for volume flow control (with TROX UNIVERSAL attachment)

TZ-SilenzioD / 200 / TUNF / RS / M / 0 / UMZ / / NC
||||||||||
12345678910
1 Type
TZ-Silenzio VAV terminal unit, supply air
 
2 Acoustic cladding
No entry: None
D With acoustic cladding
 
3 Nominal size
125, 160, 200, 250, 315
 
4 Attachments (control component)
TROX UNIVERSAL controller with
TUN Actuator (150 s)
TUNF Spring return actuator (150 s)
TUS Fast-running actuator (3 s)
TUSD Fast-running actuator (3 s), with digital communication interface (TROX HPD)
 
5 Equipment function

Room control
RE Extract air control (Room Exhaust)
 
6 Volume flow rate setting
M Master (RMF)
S Slave
F Constant volume flow controller
 
7 Signal voltage range
0 0 – 10 V DC
2 2 – 10 V DC
 
8 Expansion modules

Option 1: Power supply
No entry required: 24 V AC/DC
T EM-TRF for 230 V AC
U EM-TRF-USV for 230 V AC, provides uninterruptible power supply (UPS)
 
Option 2: Digital communication interface
No entry: None
B EM-BAC-MOD-01 for BACnet MS/TP
M EM-BAC-MOD-01 for Modbus RTU
I EM-IP for BACnet/IP, Modbus/IP and web server
R EM-IP with real time clock
 
Option 3: Automatic zero point correction
No entry: None
Z EM-AUTOZERO with solenoid valve
 
9 Operating values for factory setting
Volume flow rate [m³/h] or [l/s]
Master (RMF)
qᵥmin: Minimum volume flow rate
qᵥmax: Maximum volume flow rate

qᵥconst_sup: Constant supply air

qᵥconst_ext: Constant extract air
qᵥDiff: Supply air/extract air difference
 
Constant value
qᵥconst: Constant volume flow rate
 
Slave
No entry required
 
10 Damper blade position
Only with spring return actuators
NO Power off to OPEN
NC Power off to CLOSE
 
Useful additions
Room control panel
BE-LCD 40-character display 

Order example: TZ–Silenzio/200/TUN/RS/M/2/UIZ/600/1250/0/0/-100

Acoustic claddingNone
Nominal size200
Attachments (control component)TROX UNIVERSAL controller, actuator 150 s
Equipment functionSupply air control
Volume flow rate settingMaster (RMF)
Signal voltage characteristic2 – 10 V DC
Expansion moduleswith expansion module EM-TRF-USV
(transformer for 230 V AC and uninterruptible power supply),
with expansion module EM-IP
(communication interface BACnet IP, Modbus IP, web server),
with expansion module EM-AUTOZERO
(solenoid valve for automatic zero point correction)
 
Operating valuesqvmin = 600 m³/h
qvmax = 1250 m³/h
qvconst_sup = 0 m³/h
qvconst_ext = 0 m³/h
qvDiff = -100 m³/h



Order code for differential pressure control (with VARYCONTROL attachment)
TZ-SilenzioD / 200 / XF4 / PRS / V0 / 30 – 60 [Pa] / NO
|||||||||
123456789
1 Type
TZ-Silenzio VAV terminal unit, supply air
 
2 Acoustic cladding
No entry: None
D With acoustic cladding
 
3 Nominal size
125, 160, 200, 250, 315
 
4 Attachments (control component)
For example
XF0 Compact controller for duct pressure
XF4 Universal controller for duct pressure (VARYCONTROL)
 
5 Equipment function/Installation location
PDS Duct pressure control, supply air
PRS Room pressure control, supply air
 
6 Operating mode
F Constant value (one setpoint value)
V Variable (setpoint value range)
 
7 Signal voltage range
For the actual and setpoint value signals
0 0 – 10 V DC
2 2 – 10 V DC
 
8 Operating values for factory setting
With duct pressure control, the differential pressure [Pa] is always an absolute value
Δp,const (with operating mode F)
Δp,min - Δp,max (with operating mode V)
 
 
9 Damper blade position
Only with spring return actuators
NO Power off to OPEN
NC Power off to CLOSED


Order example: TZ-Silenzio-D/315/XF0/PDS/V2/250 – 375 Pa

Acoustic claddingWith
Nominal size315
Attachments (control component)Compact controller for duct pressure
Equipment functionDuct pressure control, supply air
Operating modeVariable pressure control Pmin - Pmax
Signal voltage characteristic2 – 10 V DC
Operating valuesPmin = 250 Pa
Pmax = 375 Pa


 

Order code for differential pressure control (with TROX UNIVERSAL attachment)
TZ-SilenzioD / 200 / TUNF / PRS / MFP / 0 / UMZ / / NC
||||||||||
12345678910
1 Type
TZ-Silenzio VAV terminal unit, supply air
 
2 Acoustic cladding
No entry: None
D With acoustic cladding
 
3 Nominal size
125, 160, 200, 250, 315
 
4 Attachments (control component)
TROX UNIVERSAL controller with
TUN Actuator (150 s)
TUNF Spring return actuator (150 s)
TUS Fast-running actuator (3 s)
TUSD Fast-running actuator (3 s), with digital communication interface (TROX HPD)
 
5 Equipment function
Differential pressure control
PRS Room pressure control, supply air
PDS Duct pressure control, supply air
 
6 Differential pressure setting
MFP Master, constant pressure control
MVP Master, variable pressure control
SFP Slave, constant pressure control
SVP Slave, variable pressure control
 
7 Signal voltage range
0 0 – 10 V DC
2 2 – 10 V DC
 
8 Expansion modules
Option 1: Power supply
No entry required: 24 V AC/DC
T EM-TRF for 230 V AC
U EM-TRF-USV for 230 V AC, provides uninterruptible power supply (UPS)
 
Option 2: Digital communication interface
No entry: None
B EM-BAC-MOD-01 for BACnet MS/TP
M EM-BAC-MOD-01 for Modbus RTU
I EM-IP for BACnet/IP, Modbus/IP and web server
R EM-IP with real time clock
 
Option 3: Volume flow rate measurement
No entry: None
V EM-V Volume flow rate measurement for differential pressure control
 
Option 4: Automatic zero point correction
No entry: None
Z EM-AUTOZERO solenoid valve (only with V)
 
9 Operating values for factory setting
Volume flow rate [m³/h] or [l/s], pressure [Pa]
 
Slave SVP
Δpmin: Minimum differential pressure
Δpmax: Maximum differential pressure slave SFP
Δpconst: Constant differential pressure
 
Master MFP and MVP – same as slave, but additionally:
qᵥmin: Minimum volume flow rate
qᵥmax: Maximum volume flow rate
qᵥconst_sup: Constant supply air
qᵥconst_ext: Constant extract air
qᵥDiff: Supply air/extract air difference
 

10 Damper blade position
Only with spring return actuators
NO Power off to OPEN
NC Power off to CLOSE

 
Useful additions
Room control panel
BE-LCD 40-character display
 
Order differential pressure transducer for room or duct pressure control separately, e.g. 
PT-699 For room pressure control
PT-699-DUCT For duct pressure control, including tube and pressure tap 


Order example: TZ-Silenzio/200/TUSD/PRS/MFP/2/BV/-20 Pa/600/1250/0/0/-100

Acoustic claddingNone
Nominal size200
Attachments (control component)TROX UNIVERSAL controller, fast-running actuator (3 s) with digital communication interface
Equipment function/installation locationRoom pressure control, supply air
Differential pressure settingMaster, constant pressure control 
Signal voltage range2 – 10 V DC
Expansion moduleswith expansion module EM-BAC-MOD-01
(communication interface BACnet MS/TP),
with expansion module EM-V
(volume flow rate measurement for differential pressure control)
Operating valuesΔpconst = -20 Pa
qvmin = 600 m³/h
qvmax = 1250 m³/h
qvconst_sup = 0 m³/h
qvconst_ext = 0 m³/h
qvDiff = -100 m³/h



Order code for room control (with EASYLAB attachment)
TZ–SilenzioD/200/ELAB/S/RS/UMZ/LAB/
| | | | | | | | |
1 2 3 4 5 6 8 9 10
1 Type
TZ-Silenzio VAV terminal unit, supply air
 
2 Acoustic cladding

No entry: None
D With acoustic cladding
 
3 Nominal size
125
160
200
250
315
 
4 Attachments (control component)
ELAB EASYLAB controller TCU3
 
5 Actuators
S Fast-running actuator (3 s)
SD Fast-running actuator (3 s), with digital communication interface (TROX HPD)
 
6 Equipment function
Room control
RS Supply air control (Room Supply)
PC Differential pressure control (Pressure Control)
 
8 Expansion modules
Option 1: Power supply
No entry required: 24 V AC/DC
T EM-TRF for 230 V AC
U EM-TRF-USV for 230 V AC, provides uninterruptible power supply (UPS)
 
Option 2: Digital communication interface
No entry: None
B EM-BAC-MOD-01 for BACnet MS/TP
M EM-BAC-MOD-01 for Modbus RTU
I EM-IP for BACnet/IP, Modbus/IP and web server
R EM-IP with real time clock
 
Option 3: Automatic zero point correction
No entry: None
Z EM-AUTOZERO Solenoid valve for automatic zero point correction
 
9 Additional functions
Without room management function
LAB Extract air led system (laboratories)
CLR Supply air led system (clean rooms)
 
With room management function
LAB-RMF Extract air led system
CLR-RMF Supply air led system
 
10 Operating values for factory setting
(only required when room management function is active)
 
Volume flow rate [m³/h] or [l/s], pressure [Pa]
 
Total extract air/supply air of room:
qᵥ1: Standard mode
qᵥ2: Reduced operation
qᵥ3: Increased operation
qᵥ4: Constant supply air
qᵥ5: Constant extract air
qᵥ6: Supply air/extract air difference
ΔpSet: Setpoint pressure (only with differential pressure control)

 
Useful additions
Room control panel (only for units with RMF)
BE-LCD 40-character display
 
The differential pressure transducer required for room pressure control (equipment function) has to be ordered separately, e.g.
PT-699 Measuring range ±50 Pa or ±100 Pa
PT-GB604 Measuring range ±100 Pa



Order example: TZ–Silenzio/200/ELAB/S/RS/LAB

Acoustic claddingNone
Nominal size200
Attachments (control component)EASYLAB controller TCU3
ActuatorFast-running actuator (3 s)
Equipment functionSupply air control (Room Supply)
Additional functionExtract air led system (laboratories)
Operating valuesNot required (room management function is not active)



Order code for single operation (with EASYLAB attachment)
TZ–SilenzioD/200/ELAB/S/SCE0/UMZ/
| | | | | | | | |
1 2 3 4 5 6 7 8 10
1 Type
TZ-Silenzio VAV terminal unit, supply air
 
2 Acoustic cladding
No entry: None
D With acoustic cladding
 
3 Nominal size
125
160
200
250
315
 
4 Attachments (control component)
ELAB EASYLAB controller TCU3
 
5 Actuators
S Fast-running actuator (3 s)
SD Fast-running actuator (3 s), with digital communication interface (TROX HPD)
 
6 Equipment function
Single operation
SC Supply air controller
 
7 External volume flow rate setting
E0 Voltage signal 0 – 10 V DC
E2 Voltage signal 2 – 10 V DC
2P Switch contacts (provided by others) for 2 switching steps
3P Switch contacts (provided by others) for 3 switching steps
F Volume flow rate constant value, without signalling
 
8 Expansion modules
Option 1: Power supply
No entry required: 24 V AC/DC
T EM-TRF for 230 V AC
U EM-TRF-USV for 230 V AC, provides uninterruptible power supply (UPS)
 
Option 2: Digital communication interface
No entry: None
B EM-BAC-MOD-01 for BACnet MS/TP
M EM-BAC-MOD-01 for Modbus RTU
I EM-IP for BACnet/IP, Modbus/IP and web server
R EM-IP with real time clock
 
Option 3: Automatic zero point correction
No entry: None
Z EM-AUTOZERO Solenoid valve for automatic zero point correction
 
10 Operating values for factory setting
Volume flow rate [m³/h] or [l/s]
Depending on external volume flow rate setting:
E0, E2: qvmin/qvmax
2P: qᵥ1/qᵥ2
3P: qᵥ1/qᵥ2/qᵥ3
F: qᵥ1



Order example: TZ-Silenzio/160/ELAB/S/SC/3P/400/600/800 m³/h

Acoustic claddingNone
Nominal size160
Attachments (control component)ELAB
ActuatorsFast-running actuator (3 s)
Equipment functionSingle controller for supply air
External volume flow rate settingSwitch contacts (provided by others) for 3 switching steps
Operating valuesqv1 = 400 m³/hqv2 = 600 m³/hqv3 = 800 m³/h

Variants

  • VARIANTS

VAV terminal unit, variant TZ-Silenzio

Application
  • VAV terminal unit for variable supply air volume flow control


VAV TERMINAL UNIT, VARIANT TZ-SILENZIO - D

Application
  • VAV terminal unit with acoustic cladding for variable supply air volume flow control
  • For rooms where the case-radiated noise of the unit is not sufficiently reduced by a false ceiling
  • The ducts for the room under consideration must have adequate acoustic insulation (to be provided by others) on the fan end
  • Ideally, the ducts on the room side should also be insulated (by others)
  • Acoustic cladding cannot be retrofitted

Standard construction

Order code detail Part Material
- Casing Galvanised sheet steel
- Effective pressure sensor Aluminium
- Damper blade Aluminium
- Damper blade seal Polyethylene, PE
- Shaft and linkage Galvanised steel
Plain bearings Plastic 
Gears Plastic, ABS



Order code detail Part Material
D Acoustic cladding casing Galvanised sheet steel
D Insulation of structure-borne noise Polyethylene, PE
D Lining Mineral wool according to EN 13501, fire rating Class A1, noncombustible

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