BESF
Ventilation box fan
The BESF box fan is a fan with forward-curved F impeller and sound-damping insulation. BESF is available in 7 sizes: BESF146, -160, -180, -200, -225, -250, and -280.
For most sizes, a model with EC motor can be selected for more efficient operation. Get an overview of the individual sizes below.
TEMPERATURE
In normal operation, tolerates temperatures up to 60 °C.
Combustion-gas fan
If there is a need for a certified combustion gas fan, we draw your attention to the FSB box fan, described under the product group Fire Protection
Product advantages
- Compact
- Fast flow changes
- Reliable solution
- F wheels (forward curved blades)
| References | Conditions |
|---|---|
| BESF16021EC2 | |
| BESF18041EC2 | |
| BESF20041EC2 | |
| BESF22541EC2 | |
| BESF25041EC2 | |
| 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 |
| References | Max. Total efficiency (A-D) (%) | Ventilation energy class - Average climate | Efficiency level requirements | ECO efficiency level during optimal operating point | EC motor | Nominal speed (RPM) | Power supply | Overload protection | Engine power (kW) |
|---|---|---|---|---|---|---|---|---|---|
| 41 |
D |
49, N(2015) |
64,7 |
EC motor with integral VSD |
1400 |
1x230 V |
Integrated in motor control |
0,03 |
|
| 39,8 |
D |
N, 49(2015) |
59,9 |
EC motor with integral VSD |
1400 |
1x230 V |
Integrated in motor control |
0,07 |
|
| BESF16021EC2 | 50,3 |
D |
49, N (2015) |
65,1 |
EC motor with integral VSD |
2800 |
1x230 V |
Integral thermal cutout (TP211) in motor power circuit |
0,75 |
| BESF18041EC2 | 48,5 |
D |
49, N (2015) |
69,3 |
EC motor with integral VSD |
1440 |
1x230 V |
Integrated in motor control |
0,18 |
| BESF20041EC2 | 48,6 |
D |
49, N (2015) |
67 |
EC motor with integral VSD |
1435 |
1x230 V |
Integrated in motor control |
0,37 |
| BESF22541EC2 | 53,9 |
D |
49, N (2015) |
71,3 |
EC motor with integral VSD |
1420 |
1x230 V |
Integrated in motor control |
0,75 |
| BESF25041EC2 | 53,5 |
D |
49, N (2015) |
69 |
EC motor with integral VSD |
1420 |
1x230 V |
Integrated in motor control |
1,1 |
| BESF280EC | 58,5 |
D |
49, N (2015) |
73,2 |
EC motor with integral VSD |
1448 |
3x400 V |
Integrated in motor control |
2,2 |
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°C
- Density = 1.2 /m3
- Values are based on the use of a transition piece equivalent to OGSR
- Gas temperature: min. -12°C, max. +60° C
- Ambient temperature: Max. +40° C
- Pressure ratio: < 1,11
- other 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).
| References | A (mm) | B (mm) | C (mm) | G (mm) | E Ø (mm) | Weight (kg) |
|---|---|---|---|---|---|---|
| 345 |
295 |
200 |
350 |
160 |
||
| 370 |
320 |
235 |
400 |
200 |
||
| BESF16021EC2 | 370 |
320 |
235 |
400 |
200 |
22 |
| BESF18041EC2 | 410 |
355 |
235 |
400 |
200 |
23 |
| BESF20041EC2 | 440 |
380 |
280 |
500 |
250 |
23 |
| BESF22541EC2 | 500 |
430 |
280 |
500 |
250 |
32 |
| BESF25041EC2 | 550 |
470 |
360 |
650 |
315 |
32 |
| BESF280EC | 600 |
515 |
360 |
650 |
315 |
65 |
| References | Max. airflow (m³/h) |
|---|---|
| 540 |
|
| 970 |
|
| BESF16021EC2 | 1475 |
| BESF18041EC2 | 1740 |
| BESF20041EC2 | 1800 |
| BESF22541EC2 | 2520 |
| BESF25041EC2 | 3240 |
| BESF280EC | 5080 |
| References | Voltage (V) | Frequency (Hz) | Max. current (A) | Engine power (kW) | ErP-effektivitetsgrad i optimalt driftspunkt |
|---|---|---|---|---|---|
| 50 |
0,75 |
0,03 |
|||
| 0,85 |
0,07 |
||||
| BESF16021EC2 | 1x230 |
50 |
3,8 |
0,75 |
|
| BESF18041EC2 | 1x230 |
50 |
1,4 |
0,18 |
|
| BESF20041EC2 | 1x230 |
50 |
2,6 |
0,37 |
67 |
| BESF22541EC2 | 1x230 |
50 |
5 |
0,75 |
|
| BESF25041EC2 | 1x230 |
50 |
8,5 |
1,1 |
69 |
| BESF280EC | 3x400 |
50 |
5,3 |
2,2 |
73,2 |
| Ventilation energy class - Average climate |
|---|
| 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 are available with four types of motor:
- EC-motor
- Single-phase AC 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.
