Humidity sensitive, presence detector and switch versions: modulates the airflow according to the various needs of the dwelling.

Airflow “+”: possibility of setting the airflow levels at installation up to + 50 m³/h on the max. airflow.

Advanced special versions: CO2, VOC, and remote control versions.

Silent working: quiet auxiliary airflow activation.

Battery indicator: buzzer to indicate low battery level.

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Pressure plug: allows pressure measurement to determine the airflow.

Easy to maintain: removable shutter case and front cover for easy cleaning.

Description
Characteristics
Schematic
Accessories
Gallery
Documents

Adjustable airflow at installation

The BXC² exhaust unit offers a range of possible airflow settings to meet specific needs, or regulatory requirements. The fixed shutter can be set at one of six positions, with an average step between each setting of + 10 m3/h (maximum = + 50 m3/h). This can, for example, be very useful to compensate for a lack of pressure.

Pressure plug to help commissioning

The built-in pressure plug makes it easy to measure the pressure using a manometer, then calculate airflow using a table in the installation instructions.

Advanced special versions

The BXC² was the first exhaust unit in the world offering the possibility of having built-in CO2 and VOC sensors, for example. These innovations are especially well suited to applications in schools, offices, gymnasiums, mobile homes, etc. A remote control version is also available.

Exhaust unit   BXC² h BXC² p BXC² hi BXC² hp BXC² pd BXC² hpd
Standard code   BXC1900 BXC1902

BXC1901

BXC1906 BXC1905 BXC1903
Airflow characteristics              
Humidity sensitive  
Boost airflow  
Boost airflow activated by switch  
Boost airflow activated by presence detection  
Other activation mode  
Airflow @ 100 Pa (min. – max.) (1)   12 – 80 12 – 80 12 – 80 12 – 80 12 – 80 12 – 80
Airflow ‘+’ – max. available airflow @ 100 Pa (2) m3/h 130 130 130 130 130 130
Acoustics              
Sound pressure level Lp @ 2 m, 100 Pa, 80 m3/h, min. airflow ‘+’ setting dB(A) 28.3
Dn,e,w (C, Ctr) acoustic insulation, RH = 65 %, min. airflow ‘+’ setting dB 57 (-2 ; -4) 57 (-2 ; -4) 57 (-2 ; -4) 57 (-2 ; -4)
Power supply              
2 x 1.5 V AAA LR03 batteries (not supplied)  
Buzzer (low battery charge)  
12 VAC supply with specific transformer (ref. CAL261)  
230 VAC supply with specific transformer (ref. CAL1228)  
Characteristics              
Colour   white white white white white white
Material (main)   PS / ABS PS / ABS PS / ABS PS / ABS PS / ABS PS / ABS
Installation              
Round air duct compatibility with integrated spigot mm ø100 ø100 ø100 ø100 ø100 ø100
Round air duct compatibility with accessory spigot (3) mm ø125 ø125 ø125 ø125 ø125 ø125
Round air duct compatibility – bracket version (min. – max.) mm ø85 – ø90 ø85 – ø90 ø85 – ø90 ø85 – ø90 ø85 – ø90 ø85 – ø90
Rectangular air duct compatibility – bracket version (min. – max.) mm 67 x 60 – 67 – 66 67 x 60 – 67 – 66 67 x 60 – 67 – 66 67 x 60 – 67 – 66 67 x 60 – 67 – 66 67 x 60 – 67 – 66
Other functions              
60’’delay to activate the presence boost airflow  
Pressure plug  

■: standard / included
◊: compatible
Note: airflow given for a ø100 duct
(1) Default setting.
(2) Airflow ‘+’: the airflow can be increased from+10 m3/h to +50 m3/h (6 positions available). This function can be used to adapt to lower pressure or to specific regulations imposing higher airflows. Standard is position 0 (minimum airflow = 12 m3/h @ 100 Pa).
(3) Delivered in specific versions or available as accessory (ref. AEA317).  

Exhaust unit   BXC² co2 BXC² voc BXC² hrc BXC² rc BFX BXC² s
Standard code   BXC1917 BXC1918 BXC1921 BXC1920 BFX1929 BXC1919
Airflow characteristics              
Humidity sensitive  
Boost airflow  
Boost airflow activated by switch  
Boost airflow activated by presence detection  
Other activation modes   CO2 level VOC level remote control remote control BXC co2or voc
Airflow @ 100 Pa (min. – max.) (1) m3/h 12-80 12-80 12-80 12-80 12 / 130 (4) 12-80
Airflow ‘+’ – maximum available airflow @ 100 Pa (2) m3/h 130 130 130 130 130 130
Acoustics              
Sound pressure level Lp @ 2 m, 100 Pa, 80 m3/h, min. airflow ‘+’ setting dB(A) 28.3
Dn,e,w (C, Ctr) Acoustic insulation, RH = 65 %, min. airflow ‘+’ setting dB 57 (-2 ; -4)
Power supply              
2 x 1.5 V AAA LR03 batteries (not supplied)  
Buzzer (low battery charge)  
12 VAC supply with integrated specific transformer   ■ (ref. CAL261) ■ (ref. CAL261) ■ (ref. CAL261)
230 VAC supply with specific transformer (ref. CAL1228)  
Characteristics              
Colour   white white white white white white
Material (main)   PS / ABS PS / ABS PS / ABS PS / ABS PS / ABS PS / ABS
Installation              
Round air duct compatibility with integrated spigot mm ø100 ø100 ø100 ø100 ø100 ø100
Round air duct compatibility with accessory spigot (3) mm ø125 ø125 ø125 ø125 ø125 ø125
Round air duct compatibility – bracket version (min.-max.) mm ø85 – ø90 ø85 – ø90 ø85 – ø90 ø85 – ø90 ø85 – ø90 ø85 – ø90
Rectangular air duct compatibility bracket version (min.-max.) mm 67 x 60 – 67 x 66 67 x 60 – 67 x 66 67 x 60 – 67 x 66 67 x 60 – 67 x 66 67 x 60 – 67 x 66 67 x 60 – 67 x 66
Other functions              
60’’delay to activate the presence boost airflow  
Pressure plug  

■: standard / included
◊: compatible
Note: airflow given for a ø100 duct
(1) Default setting.
(2) Airflow ‘+’: the airflow can be increased from+10 m3/h to +50 m3/h (6 positions available). This function can be used to adapt to lower pressure or to specific regulations imposing higher airflows. Standard is position 0 (minimum airflow = 12 m3/h @ 100 Pa).
(3) Delivered in specific versions or available as accessory (ref. AEA317).
(4) Total of 18 configurations available for airflow setting for BFX version.

AIRFLOW / DIMENSIONS IN MM

IMAGE CODE DESIGNATION
CAF CAF Stops the propagation of fire cold smokes through ventilation ducts
CAL261 CAL261 Supply device 12 VAC / 3 VDC (mandatory for BXC connected to 12 VAC supply)
CAL1228 CAL1228 Supply device 230 VAC / 3 VDC (mandatory for BXC connected to 230 VAC supply)
33007AL 33007AL Trident plastic sleeve ø125 mm – L 125 mm
85343AL 85343AL Trident plastic sleeve ø125 mm – ø80 mm – L 125 mm
FBE475 FBE Aluminium filter box with washable filter for exhaust units
19429AL 19429AL Phonic ring for exhaust units – ø125 mm
AEA317 AEA317 Plastic adapter ø125 mm, black, with joint
AEA478 Remote control for boost airflox activation
BXC²

Maintenance instruction - D7205_A

BXC²

Installation instruction - D7199_A

BXC²

Product booklet - FLY727GB_v1

BXC²

Features, versions and applications booklet – FLY735GB

Compatible ventilation systems: