2022 | INDUSTRIAL VENTILATION
TwinBox EC
Duct mixed-type fans in sound-insulated casing
Use
Exhaust ventilation systems for commercial, office and other public or industrial premises with limited installation space.
The TwinBox EC unit ensures uninterrupted ventilation operation: if one fan fails, the second fan automatically switches on.
The modes are controlled by the controller, which is not included in the delivery set and must be ordered separately.
Designed for connection to round air ducts with a diameter of 150 to 400 mm.
Air flow: up to
Power: from
4410
1225
56 W
m³/h
l/s
Design
The fan casing is made of galvanized sheet steel using heat- and sound-insulation material.
The round connecting spigots are rubber sealed.
The hinged cover gives free access to the motors, simplifies installation and maintenance of the fans and ducts without dismantling.
The air damper allows adjusting the direction of air flow. Controlled by the air flow.
Motor
The unit is equipped with high-efficient electronically commutated (EC)
DC motors with mixed-type impellers.
These state-of-the-art motors are the most advanced solution in energy efficiency today.
The motors are equipped with built-in overheating protection.
Ball bearings in the motor ensure long service life (40 000 hours).
To achieve accurate performance, low noise levels and safe fan operation, each turbine is dynamically balanced during assembly.
The motor ingress protection rating is IP44.
Impeller
Thanks to the improved mixed-type impeller, which is a hybrid of axial and centrifugal impeller, the
TwinBox EC unit has low power consumption and noise level with high performance.
The diffuser, the specially profiled impeller and the directing vanes at the outlet of the fan casing distribute air flow in such a way as to attain the best combination of high performance and high pressure at low noise level.
2
Designation key
Series
TwinBox
Motor type
EC: electronically commutated motor
Accessories
Silencers Filter boxes
SD KFBK / KFBT
Duct diameter [mm]
150; 200; 315; 355; 400
Electric heaters Water heaters Backdraft air dampers Air dampers
EKH WKH VRV VK / VKA blaubergventilatoren.de
blaubergventilatoren.de
Controller
Allows tracking the motor failures and signalling them, as well as automatically switching the unit to operation with a functioning motor.
The controller is not included in the delivery set and must be ordered separately.
OPERATION MODES:
Automatic alternation of the active fan with preset switching period.
Forced constant operation of the fan A. Forced constant operation of the fan B. Fan alarm. The failed fan is switched off, the second fan is switched on. The controller generates an error signal and corresponding indication.
Fan speed control.
Boost mode increases the performance of the fan. It is possible to set the time during which the fan will run in this mode.
Test mode. Automatic alternation of the active fan with a period from 1 to 12 min.
Checking motors at start-up.
Possibility of connection to BMS.
Possibility of connecting an external 0-10 V sensor. Possibility of connecting external devices (10 V and 24 V).
Mounting
The duct fans are intended for mounting to round air ducts.
The fans are installed between the air ducts.
While mounting the fan provide enough access for servicing and repair operations.
Overall dimensions
[mm]
Type
TwinBox EC 150
TwinBox EC 200
TwinBox EC 315
TwinBox EC 355
TwinBox EC 400
∅ D
149
199
314
354
399
H
321
375
520
520
551
L
975
975
1293
1334
1358
L1
850
850
1170
1170
1194
W
621
791
1092
1092
1182
W1
540
710
1010
1010
1101
Weight [kg]
28
39
97
97
129
INDUSTRIAL VENTILATION | 2022 3
4
2022 | INDUSTRIAL VENTILATION
Technical data
Parameters TwinBox EC 150 TwinBox EC 200
Voltage [V / 50/60 Hz]
Power [W]
Current [A]
Max. air flow [m³/h (l/s)]
RPM [min⁻¹]
Sound pressure level at 3m [dBA]
Transported air temperature [°C]
Protection rating
Motor protection rating
1~220–240
56
0.48
450 (125)
3390
37.5
–25…+55
IPX4
IP44
1~220–240
117
0.94
910 (253)
3404
43
–25…+55
IPX4
IP44
Erp compliance 2016, 2018 2016, 2018
To comply with ErP 2018 it is necessary to use a local demand control typology (connect the sensor).
TwinBox EC 315
1~220–240
535
1.56
2780 (772)
2474
45
–25…+55
IPX4
IP54
2016, 2018
TwinBox EC 355
1~220–240
354
1.57
3060 (850)
2470
45
–25…+55
IPX4
IP44
2016, 2018
TwinBox EC 400
1~220–240
737
4.65
4410 (1225)
2370
48
–25…+55
IPX4
IP44
2016, 2018
TWINBOX EC 150
Sound power level,
A-weighted
Total
Octave frequency bands [Hz]
63 125 250 500 1000 2000 4000 8000
LpA
3 m
LpA
1 m
L wA
to inlet [dBA]
L wA
to outlet [dBA]
L wA
to environment [dBA]
63
62
58
39 58 61 49 42
34 54 60 48 38
38 56 54 44 38
39 42
37 43
33 32
35
37
26
42 52
41 51
37.5 47.5
450
0
400
350
20 40 60 80 100
Air flow [l/s]
120
300
250
200
150
100
50
0
0 50 100 150 200 250 300 350 400 450 500
Air flow [m 3 /h]
70
0 20 40 60 80 100
Air flow [l/s]
120
65
60
55
50
45
0 50 100 150 200 250 300 350 400 450 500
TWINBOX EC 200
Sound power level,
A-weighted
Total
Octave frequency bands [Hz]
63 125 250 500 1000 2000 4000 8000
LpA
3 m
LpA
1 m
L wA
to inlet [dBA]
L wA
to outlet [dBA]
L wA
to environment [dBA]
69
67
64
44 64 67 54 46 42
39 60 66 53 41 40
43 61 59 48 41 35
46 38
46 40
35 29
48 58
47 57
43 53
120
100
80
450
0
400
350
300
250
40 80 120 160 200
Air flow [l/s]
240
200
150
100
50
0
0 100 200 300 400 500 600 700 800 900 1000
Air flow [m 3 /h]
160
0 40 80 120 160 200
Air flow [l/s]
240
140 blaubergventilatoren.de
blaubergventilatoren.de
TWINBOX EC 315
Sound power level,
A-weighted
L wA
to inlet [dBA]
L wA
to outlet [dBA]
L wA
to environment [dBA]
70
68
66
Total
Octave frequency bands [Hz]
63 125 250 500 1000 2000 4000 8000
LpA
3 m
LpA
1 m
46 66 68 55 47
40 61 67 53 42
45 64 61 49 42
43 47
40 47
36 36
39
40
29
50 60
48 58
45 55
700
0
Air flow [l/s]
100 200 300 400 500 600 700 800
600
500
400
300
200
100
0
0 500 1000 1500 2000 2500 3000
Air flow [m 3 /h]
Air flow [l/s]
100 200 300 400 500 600 700 800
400
0
380
360
340
320
300
0 500 1000 1500 2000 2500
3
3000
TWINBOX EC 355
Sound power level,
A-weighted
Total
Octave frequency bands [Hz]
63 125 250 500 1000 2000 4000 8000
LpA
3 m
LpA
1 m
L wA
to inlet [dBA]
L wA
to outlet [dBA]
L wA
to environment [dBA]
72
71
66
47 68 70 56 48
42 63 70 55 43
45 64 61 49 42
44
41
36
48 39
48 42
36 29
52 62
50 60
45 55
700
Air flow [l/s]
0 100 200 300 400 500 600 700 800
600
500
400
300
200
100
0
0
450
400 800 1200 1600 2000 2400 2800 3200
Air flow [m 3 /h]
Air flow [l/s]
0 100 200 300 400 500 600 700 800
400
350
300
250
0 400 800 1200 1600 2000 2400 2800 3200
TWINBOX EC 400
Sound power level,
A-weighted
L wA
to inlet [dBA]
L wA
to outlet [dBA]
L wA
to environment [dBA]
76
75
68
Total
Octave frequency bands [Hz]
63 125 250 500 1000 2000 4000 8000
LpA
3 m
LpA
1 m
50 71 74 59 50
46 68 74 58 45
47 66 63 51 44
46 50
43 51
37 37
41
44
30
55 65
54 64
48 58
800
0 200 400 600 800
Air flow [l/s]
1000 1200
700
600
500
400
300
200
100
0
800
0
0 500 1000 1500 2000 2500 3000 3500 4000 4500
Air flow [m 3 /h]
200 400 600 800
Air flow [l/s]
1000 1200
700
600
500
0 500 1000 1500 2000 2500 3000 3500 4000 4500
INDUSTRIAL VENTILATION | 2022 5
