BESF box fan

Description of BESF box fan

Description

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. See more under Capacity - and find technical data for the different sizes under BESFxxx Technical Data

Temperature

In normal operation, tolerates temperatures up to 60 °C.

BESF146 - BESF180 tolerate temperatures up to 200 °C for 60 min. in case of fire and BESF200 - BESF280 tolerate temperatures up to 300 °C for 60 min. in case of fire. 

If there is a need for a certified smoke extraction fan, we draw your attention to the FSB box fan, described under the product group Fire Protection

 
Capacity - overview

BESF box fans

 

  Capacity m3/h
  Min. Max.
BESF146-4-1 68 540
BESF160-4-1 120 970
BESF160-2-1EC 150 1,475
BESF180-4-1EC 135 1,740
BESF200-4-1EC 240 1,800
BESF225-4-1EC 265 2,520
BESF250-4-1EC 275 3,240
BESF250-4-3 770 3,390
BESF280-4-3 900 3,960
BESF280-4-3EC 580 5,080
Design

BESF box fan


Design

 
BESF konstruktion

BESF box fans are made from Aluzinc® AZ185 class C4 in accordance with EN/ISO12944-2 and insulated for sound and condensation 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 cope with up to 200°C for 60 min.
As standard, BESF200-280 can handle up to 300°C for 60 min.



Fan impeller

 
BESF ventilatorhjul

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.



Spigots

 
BESF gummiliste The spigots on BESF have rubber gaskets to ease mounting of ducts.


Oscillation dampers

 
BESB svingningsdæmpere

To minimise noise and vibration, the box fan is fitted as standard with efficient oscillation dampers mounted on brackets.



OGSR transition piece

 
BESF med OGSR 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.

 


Motor types

BESF box fan

BESF box fans have their motor connected directly to the fan impeller.

BESF box fans are available with three types of motor:

- EC motor
- single-phase motor
- 3-phase 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.


EC motor

The EC motor for BESF is a permanent-magnet motor of class IE5 (BESF25041EC: IE4) with motor control for 1 x 230 V or 3 x 400 V connection. The motor control and the motor are protected from overloading, blocking, over and under voltage, and over heating.

The motor control is factory programmed by EXHAUSTO for optimal operation of the fan. It only requires mains connection and a control signal from an EXHAUSTO EFC1P or MAC12 controller or a 0-10V signal.

The motor controls also provide a Modbus interface for fan control and alarm read-offs etc.


Single-phase and 3-phase motor:

Single-phase motors can be selected for BESF146/BESF160/BESF250. All motors are 4-pole with 1400 rpm, and permit direct voltage control using EXHAUSTO controllers EFC16, EFC35 and MAC12 (with MPR4 or MPR8 module).

3-phase motors can be selected for BESF250/BESF280. The motor is designed for a fixed rpm of 1400 or for frequency control (max. 50 Hz) by external frequency converter. The 3-phase motors must use external motor protection, or can be controlled by an external frequency converter (with integral motor protection) to max. 50 Hz. 

Installation

BESF box fan

The box fan can be mounted in various positions. Note, however, that the fan must not be positioned with the motor turned downwards.

Standard installation: A

Alternative installation options B/C/D:

BESB monteringsmuligheder

 

During installation, consideration must be given to opening the door for servicing and for access to door screws (see dimensions table on pages 7 and 15 in the product instructions where opening radius R is given). There should also be enough space to insulate the ducts.

In installation options B and D, with the door facing upwards, special fittings must be used to hold the door (accessory).

The box fan should not be screwed onto the supporting base. The base must be stable and vibration free, with no sagging. 

Flue gas resistance

BESF

As standard, BESF can handle gas temperatures up to 60°C.


Flue gas resistance

 

Accessories

BESF box fan


FLF Flexible connector

 
FLF Flexforbindelse FLF flexible connector is made from reinforced glass fabric with integral clamps.

FLF is fitted directly onto EXHAUSTO box fans as a coupling to the fan ducts and minimises any possibility of vibrations moving along the duct system.


BFL Brandflex

 
BFL Brandflex BFL is made from steel-reinforced glass fabric, ceramic material and silica fibre.
 
BFL Brandflex satisfies the fire safety requirements for building components of materials class A2-s1,d0 in accordance with EN13501-1.


THA/THAV Roof terminal

 
THA THAV afkasttaghætter 150 x 100 Roof terminals THA and THAV are designed for air exhausts from EXHAUSTO box fans BESB and BESF.

THA is insulated for condensation and has a horizontal exhaust, while THAV is insulated for both sound and condensation and has a vertical exhaust.

More information on roof terminals.


OGSR transition piece

 
BESF med OGSR To minimise system pressure drop when connecting to a duct system, we recommend the use of an OGSR transition piece.

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.

Add all about the product series BESF box fan

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