BXC² - Aereco
BXC²
DEMAND CONTROLLED EXHAUST UNIT FOR MEV A multifunctional exhaust unit to optimise indoor air quality and energy efficiency in MEV applications
The BXC gets a makeover and becomes the BXC2: new design, same features. It incorporates all of the functions one could want in an air exhaust unit: various activation modes, such as humidity sensitive, presence detection and switch are available to adapt the ventilation to occupants’ needs. The exhaust airflow is automatically modulated, in silent operation. The range of variable airflows can be set at installation to meet special needs, or to compensate for a lack of pressure; commissioning is also facilitated by the presence of a pressure plug, which allows measurement and easy calculation of the airflow.
Aereco has developed the BXC2 hps, a humidity sensitive exhaust unit that indicates to the occupant the operating status of the ventilation system. In addition to modulating the airflow according to humidity, this exhaust unit indicates whether the ventilation is operating correctly or not.
The BXC2 hps, is especially adapted to satisfy Section 1.2.2.10 of the Technical Guidance Documents (TGD) Part F 2019 of the new Building Regulations in Ireland.
Distribution of the BXC will be phased out and only the BXC2 will be supplied.
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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.
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 Description Characteristics Schematic Accessories Gallery Documents
Adjustable airflow at installation
The BXC2 extract grille 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 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 BXC 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 | BXC2 hps | |
| BXC² standard codes (* = in stock) | ∅100 ∅125 | BXC1900* BXC1907* | BXC1902 BXC1909 | BXC1901* BXC1904* | BXC1906 | BXC1905* BXC1915* | BXC1903* BXC1908* | BXC1898* BXC1899* |
| BXC standard codes | ∅100 ∅125 | BXC211 BXC273 | BXC213 BXC276 | BXC212 BXC215 | BXC272 | BXC216 BXC299 | BXC214 BXC275 | BXC1842/1876 |
| 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 | 12 – 80 | |
| Airflow ‘+’ – max. available airflow @ 100 Pa (2) | m3/h | 130 | 130 | 130 | 130 | 130 | 130 | 130 |
| Airflow @ 100 Pa (min. – max.) 100 diameter | – | – | – | – | – | – | – | ■ |
| 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 | white | |
| Material (main) | PS / ABS | 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 | ø100 |
| Round air duct compatibility with accessory spigot (3) | mm | ø125 | 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 hrc | BXC2 rc | BFX2 | BXC2 s | |
| BXC² standard codes (* = in stock) | ∅100 ∅125 | BXC1921 | BXC1920 | BFX1929 BFX1930 * | BXC1919 |
| BXC standard codes | ∅100 ∅125 | BXC406 | BXC404 | BXC369 BXC371 * | BXC403 |
| Airflow characteristics | |||||
| Humidity sensitive | ■ | – | – | – | |
| Boost airflow | ■ | ■ | – | ■ | |
| Boost airflow activated by switch | – | – | – | ◊ | |
| Boost airflow activated by presence detection | – | – | – | – | |
| Other activation modes | remote control | remote control | – | BXC co2or voc | |
| Airflow @ 100 Pa (min. – max.) (1) | m3/h | 12-80 | 12-80 | 12 / 130 (4) | 12-80 |
| Airflow ‘+’ – maximum available airflow @ 100 Pa (2) | m3/h | 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) | ◊ | ◊ | – | ■ | |
| 230 VAC supply with specific transformer (ref. CAL1228) | ◊ | ◊ | – | ◊ | |
| Characteristics | |||||
| Colour | white | white | white | white | |
| Material (main) | PS / ABS | PS / ABS | PS / ABS | PS / ABS | |
| Installation | |||||
| Round air duct compatibility with integrated spigot | mm | ø100 | ø100 | ø100 | ø100 |
| Round air duct compatibility with accessory spigot (3) | mm | ø125 | ø125 | ø125 | ø125 |
| Round air duct compatibility – bracket version (min.-max.) | mm | 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 |
| Other functions | |||||
| Other activation code (system indicator) | – | – | – | ■ | |
| 60’’delay to activate the presence boost airflow | – | – | – | – | |
| Fault Indicator | – | – | – | ■ | |
■: 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 |
![]() | BHM429 | Phonic plate for exhaust units ø125 mm |
![]() | AEA478 | Remote control for boost airflox activation |
![]() | BXCFS30 | Metal fire collar |
Previous Next Aereco BXChps Troubleshooting BXC2
Product booklet - FLY727IE_V1
BXC2 hps
Maintenance Instruction_D7205_B
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Installation instructions _D7204_B
BXCFS30
Metal fire collar - FLY695
Full Scale Metal Web Joist Floor Fire Test BXC
Product booklet – FLY475_V5
BXC
Installation instruction of the CAL1228 - D6106_C
BXC2
Maintenance instruction D4192_B
BXC
Maintenance instruction D4192_B
BXC
Installation instruction D4271_F
BXC
Features, versions and applications booklet – FLY447_V5
BXC
Installation instructions for BFX – D6140_A
CAL 12V for BXC
Installation instructions for CAL 12V for BXC – D4331_E
BXC
Maintenance instructions for BXC with CO2-VOC detection / remote control – D4588_B
BXC
Installation instructions for BXC with CO2-VOC detection / remote control – D4587_C
Compatible ventilation systems:Mechanical exhaust ventilation – MEV – individual treatment
Mechanical exhaust ventilation – MEV – collective treatment
Mechanical exhaust ventilation with heat recovery – MEVHR
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