BESF
Ventilation box fan
Box fan in 7 sizes – most can be selected with EC motor. Compact box fan targeted need for fast flow changes.
Box fan in 7 sizes – most can be selected with EC motor. Compact box fan targeted need for fast flow changes.
| Variants | ECO efficiency level during optimal operating point | Efficiency level requirements | Max. Total efficiency (A-D) (%) | EC motor | Nominal speed (RPM) | Overload protection | Power supply |
|---|---|---|---|---|---|---|---|
| BESF14641EC | 64,7 | 49, N(2015) | 41 % | EC motor with integral VSD | 1400 RPM | Integrated in motor control | 1x230 V |
| BESF16041EC | 59,9 | N, 49(2015) | 39,8 % | EC motor with integral VSD | 1400 RPM | Integrated in motor control | 1x230 V |
| BESF16021EC2 | 65,1 | 49, N (2015) | 50,3 % | EC motor with integral VSD | 2800 RPM | Integral thermal cutout (TP211) in motor power circuit | 1x230 V |
| BESF18041EC2 | 69,3 | 49, N (2015) | 48,5 % | EC motor with integral VSD | 1440 RPM | Integrated in motor control | 1x230 V |
| BESF20041EC2 | 67 | 49, N (2015) | 48,6 % | EC motor with integral VSD | 1435 RPM | Integrated in motor control | 1x230 V |
| BESF22541EC2 | 71,3 | 49, N (2015) | 53,9 % | EC motor with integral VSD | 1420 RPM | Integrated in motor control | 1x230 V |
| BESF25041EC2 | 69 | 49, N (2015) | 53,5 % | EC motor with integral VSD | 1420 RPM | Integrated in motor control | 1x230 V |
| BESF280EC | 73,2 | 49, N (2015) | 58,5 % | EC motor with integral VSD | 1448 RPM | Integrated in motor control | 3x400 V |
| Variants | Conditions |
|---|---|
| BESF280EC | CONDITIONS:* I is the maximum absorbed current throughout the control range - or the full load current if this is larger** P1 is the maximum absorbed power from the mains supply, where P2 is the motor's nominal output.Stated data for for t = 20°CDensity = 1.2 /m3Values are based on the use of a transition piece equivalent to OGSRGas temperature: min. -12°C, max. +60° CAmbient temperature: Max. +40° CPressure ratio: < 1,11other points in acc. with EC327/2011 - see product instructions |
The BESF box fan can be mounted in various positions. Note, however, that the ventilator must not be positioned with the motor turned downwards. Standard installation: A Alternative installation options B/C/D: NB: During intermittent operation, there is a risk of condensation in the motor – use mounting method A or B The BESF box fan must not be installed outdoors – here we refer to the outdoor version of the BESB (OD).
| Variants | A (mm) | B (mm) | C (mm) | D (mm) | G (mm) | H (mm) | Weight (kg) | R (mm) | E Ø (mm) |
|---|---|---|---|---|---|---|---|---|---|
| BESF14641EC | 345 mm | 295 mm | 200 mm | 235 mm | 350 mm | 165 mm | 13 kg | 345 mm | 160 mm |
| BESF16041EC | 370 mm | 320 mm | 235 mm | 400 mm | 17 kg | 200 mm | |||
| BESF16021EC2 | 370 mm | 320 mm | 235 mm | 400 mm | 22 kg | 200 mm | |||
| BESF18041EC2 | 410 mm | 355 mm | 235 mm | 400 mm | 23 kg | 200 mm | |||
| BESF20041EC2 | 440 mm | 380 mm | 280 mm | 500 mm | 23 kg | 250 mm | |||
| BESF22541EC2 | 500 mm | 430 mm | 280 mm | 500 mm | 32 kg | 250 mm | |||
| BESF25041EC2 | 550 mm | 470 mm | 360 mm | 650 mm | 32 kg | 315 mm | |||
| BESF280EC | 600 mm | 515 mm | 360 mm | 650 mm | 65 kg | 315 mm |
| Variants | Max. airflow (m³/h) |
|---|---|
| BESF14641EC | 540 m³/h |
| BESF16041EC | 970 m³/h |
| BESF16021EC2 | 1475 m³/h |
| BESF18041EC2 | 1740 m³/h |
| BESF20041EC2 | 1800 m³/h |
| BESF22541EC2 | 2520 m³/h |
| BESF25041EC2 | 3240 m³/h |
| BESF280EC | 5080 m³/h |
| Variants | Frequency (Hz) | Max. current (A) | Voltage (V) | Engine power (kW) | ErP-effektivitetsgrad i optimalt driftspunkt |
|---|---|---|---|---|---|
| BESF14641EC | 50/60 Hz | 0,75 A | 1x230 V | 0,03 kW | 64,7 |
| BESF16041EC | 50/60 Hz | 0,85 A | 1x230 V | 0,07 kW | 59,9 |
| BESF16021EC2 | 50/60 Hz | 3,8 A | 1x230 V | 0,75 kW | 59,9 |
| BESF18041EC2 | 50/60 Hz | 1,4 A | 1x230 V | 0,18 kW | 69,2 |
| BESF20041EC2 | 50/60 Hz | 2,6 A | 1x230 V | 0,37 kW | 66,4 |
| BESF22541EC2 | 50/60 Hz | 5 A | 1x230 V | 0,75 kW | 69,1 |
| BESF25041EC2 | 50/60 Hz | 8,5 A | 1x230 V | 1,1 kW | 68 |
| BESF280EC | 50/60 Hz | 5,3 A | 3x400 V | 2,2 kW | 71 |
| Variants | Ventilation energy class - Average climate |
|---|---|
| BESF14641EC | D |
| BESF16041EC | D |
| BESF16021EC2 | D |
| BESF18041EC2 | D |
| BESF20041EC2 | D |
| BESF22541EC2 | D |
| BESF25041EC2 | D |
| BESF280EC | D |
BESF box fans are made from Aluzinc® AZ185 class C4 in accordance with EN/ISO12944-2 and sound and condensation-insulated with 30 mm mineral wool.
As standard, BESF can handle gas temperatures up to 60°C.
When used as a smoke extract fan:
BESF146-180 can as standard withstand up to 200°C for 60 min.
As standard, BESF200-280 can handle up to 300°C for 60 min.
If certified fire gas fan is to be used, we refer to the FSB fan
The fan impeller is an F-impeller made from galvanised steel.
It has forward-curved blades, which means that the box fan is able to generate a high pressure for its compact size.
The spigots on BESF have rubber gaskets to ease mounting of ducts.
To minimise noise and vibration, the box fan is fitted as standard with efficient vibration dampers mounted on brackets.
To minimise system pressure drop when connecting to a duct system, we recommend the use of an OGSR transition piece (accessory).
OGSR is a specially developed circular transition piece with integral guide panels; it can be supplied for BESF200, 225, 250 and 280 and allows maximum capacity and efficiency to be achieved.
OGSR is not available with other BESF models.
BESF box ventilators have their motor connected directly to the ventilator impeller.
BESF box fans comes with EC-motor
The motors are made to protection class IP54 and all materials are as a minimum class F (155 °C). All motor types have integral current overload protection.
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