2022 | INDUSTRIAL VENTILATION
Box
Centrifugal fans for rectangular ducts
Use
Supply and exhaust ventilation systems installed in various premises.
Compatible with 400x200 up to 1000x500 mm rectangular air ducts.
Air flow: up to 15000
4167
m³/h
l/s
Power: from 136 W
Noise level: from 50 dBA
Design
Atmospheric resistant galvanized steel casing.
The fan is rated for continuous operation.
Fitted with standard 20 mm connecting flanges for connection to rectangular air ducts.
Access cover on the casing for inspection and maintenance operations.
The fan is equipped with a built-in terminal box with a leaded outside sealed electrical lead-in for connection to power mains.
Motor
Two- or four-pole asynchronous motor with external rotor and centrifugal impeller with backward curved blades.
Single-phase ( E ) or three-phase ( D ) motor modifications.
Equipped with ball bearings for longer service life.
Dynamically balanced impeller.
Overheating protection by built-in thermal switches with automatic restart or with leaded outside terminals for connection to external protecting controls.
The thermal switch terminal leads are designed for connection to respective circuit of the contacter, overload relay or respective terminals of the autotransformer or thyristor speed controller.
Speed control
Smooth speed control with an external thyristor controller or step speed control with an external auto transformer (both available upon separate order).
Mounting
The fan is designed for mounting inside rectangular air ducts and can be installed in any position.
The fan flanges are connected to the air ducts through the bolts inserted into the flange holes.
The fan is suitable for mounting into round duct at intake flange with a round reducer (available upon separate order).
If vibration-absorbing flexible connectors are used to connect the fan to the air ducts provide their fixation to mounting structures with supports or brackets.
While mounting provide enough space for accessing the cover for service operations.
Designation key
Series
Box
Flange size (width x height) [cm]
40x20; 50x25; 50x30; 60x30; 60x35; 70x40; 80x50; 100x50
Accessories
Silencers Filter boxes
Motor
Number of poles
2; 4; 6
Phase
E: single-phase
D: three-phase
Electric heaters Water heaters Air dampers Gravity dampers
Flexible antivibration connectors
Speed controllers
232
SD KFBK / KFBT EKH WKH SL VG EVA CDTE 1.8
blaubergventilatoren.de
blaubergventilatoren.de
Overall dimensions
[mm]
Type
Box 40x20 2E
Box 50x25 2E
Box 50x30 4E
Box 50x30 4D
Box 60x30 4E
Box 60x30 4D
Box 60x35 4E
Box 60x35 4D
Box 60x35 4E max
Box 70x40 4D
Box 80x50 4D
Box 100x50 4D
Box 100x50 6D
B
600
600
600
600
400
500
500
500
600
700
800
1000
1000
B1
640
640
640
640
440
540
540
540
640
740
840
1040
1040
H
300
300
350
350
200
250
300
300
350
400
500
500
500
H1
340
340
390
390
240
290
340
340
390
440
540
540
540
H2
342
342
390
390
240
290
340
340
390
440
540
720
720
L
680
680
735
735
500
640
680
680
652
753
903
1150
1150
Weight [kg]
11.25
17.88
19.80
19.80
27.77
27.77
36.38
36.38
30.0
41.0
54.0
126.0
120.0
Box 40x20…Box 60x35 Box 100x50 4D
INDUSTRIAL VENTILATION | 2022 233
2022 | INDUSTRIAL VENTILATION
Technical data
Parameters
Voltage [V]
Frequency [Hz]
Power [W]
Current [A]
Maximum air flow [m³/h (l/s)]
RPM [min⁻¹]
Sound pressure at 3 m [dBA]
Transported air temperature [°C]
IP rating
Motor IP rating
ErP
Box 40x20 2E
50
138
0.6
930 (258)
2600
50
1 ~ 230
60
200
0.88
1070 (297)
2850
52
-25…+45
IPX4
IP44
2018
Box 50x25 2E
50
305
1.32
1720 (478)
2550
57
1 ~ 230
60
380
1.65
1850 (514)
2830
58
-25…+45
IPX4
IP44
2018
Box 50x30 4E
50
140
0.57
1700 (472)
1 ~ 230
60
175
0.73
1855 (515)
1390
53
-25…+45
1530
55
-25…+50
IPX4
IP44
2018
Box 50x30 4D
50
136
0.34
1380 (383)
3 ~ 400
60
165
0.53
1620 (450)
1360
52
-25…+65
1600
55
-25…+55
IPX4
IP44
2018
BOX 40x20 2E
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]
78
82
71
67 74 74 69 63
69 74 76 75 72
46 58 66 65 66
63 61
72 71
56 51
53
63
41
58 68
61 71
50 60
600
500
50 Hz
60 Hz
400
300
200
100
0
0
220
190
160
130
100
0
200
200
400
400
600
600
800 1000
Air flow [m³/h]
800 1000
BOX 50x30 4E
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]
81
85
74
62 70 73 64 77
59 70 75 75 80
50 63 70 66 66
75 70
79 77
65 61
64
72
55
60 70
65 75
53 63
350
300
50 Hz
60 Hz
250
200
150
100
50
0
0 400 800 1200 1600 2000
Air flow [m³/h]
170
150
130
110
90
0 400 800 1200 1600 2000
BOX 50x25 2E
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]
83
85
77
69 77 79 67 70 74
69 74 77 76 80 77
43 60 73 73 70 64
71 66
77 71
58 48
62 72
65 75
57 67
800
700
600
500
400
300
200
100
0
0
400
360
320
280
240
0
400
400
800
800
1200
1200
50 Hz
60 Hz
1600 2000
Air flow [m³/h]
1600 2000
BOX 50x30 4D
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]
80
83
73
61 69 72 63 75 74
58 69 74 74 78 77
50 62 69 65 65 64
69 63
75 71
60 54
59 69
63 73
52 62
350
300
50 Hz
60 Hz
250
200
150
100
50
0
0
170
150
130
110
90
0
200 400 600 800 1000 1200 1400 1600 1800
Air flow [m³/h]
200 400 600 800 1000 1200 1400 1600 1800
234 blaubergventilatoren.de
blaubergventilatoren.de
Parameters
Voltage [V]
Frequency [Hz]
Power [W]
Current [A]
Maximum air flow [m³/h (l/s)]
RPM [min⁻¹]
Sound pressure at 3 m [dBA]
Transported air temperature [°C]
IP rating
Motor IP rating
ErP
Box 60x30 4E
50
220
0.9
2470 (686)
1 ~ 230
60
310
1.38
2510 (697)
1400
52
-25…+45
1450
52
-25…+40
IPX4
IP44
2018
Box 60x30 4D
50
230
0.52
2530 (703)
3 ~ 400
60
235
0.53
2630 (731)
1360
51
-25…+70
1600
53
-25…+65
IPX4
IP44
2018
Box 60x35 4E
50
470
2.37
2950 (820)
1 ~ 230
60
700
3.15
3515 (976)
1370
52
-40…+80
1460
53
-40…+55
IPX4
IP44
2018
BOX 60x30 4E
Sound power level,
A-weighted
L wA
to inlet [dBA]
L wA
to outlet [dBA]
L wA
to environment [dBA]
86
89
73
Total
Octave frequency bands [Hz]
63 125 250 500 1000 2000 4000 8000
LpA
3 m
LpA
1 m
74 81 81 76 69
76 81 84 83 79
47 60 68 67 68
69 67
79 78
58 53
58
69
42
65 75
69 79
52 62
500
400
50 Hz
60 Hz
300
200
100
0
0
320
290
260
230
200
0
500
500
1000
1000
1500
1500
2000 2500
Air flow [m³/h]
2000 2500
BOX 60x35 4E
Sound power level,
A-weighted
L wA
to inlet [dBA]
L wA
to outlet [dBA]
L wA
to environment [dBA]
87
90
72
Total
Octave frequency bands [Hz]
63 125 250 500 1000 2000 4000 8000
LpA
3 m
LpA
1 m
79 83 79 75 77
78 78 79 81 85
44 59 65 68 67
75 74
83 81
61 58
62
68
50
67 77
69 79
52 62
700
600
50 Hz
60 Hz
500
400
300
200
100
0
0
750
650
550
450
350
0
500
500
1000
1000
1500
1500
2000
2000
2500
2500
3000 3500
Air flow [m³/h]
3000 3500
Box 60x35 4E max
50
447
1.97
4070
1~ 220–240
60
679
2.99
4500
1380
54
-30…+60
1600
56
-30…+60
IPX4
IP44
2018
BOX 60x30 4D
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]
84
88
72
73 79 79 74 68
74 79 82 81 77
47 59 67 66 67
68
77
57
66 57
76 68
52 42
63 73
67 77
51 61
500
400
50 Hz
60 Hz
300
200
100
0
0
230
210
190
0
500
500
1000
1000
1500
1500
2000 2500
Air flow [m³/h]
2000 2500
BOX 60x35 4E MAX
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]
82
88
74
48 80 72 74 74
53 84 78 81 81
53 71 67 66 64
69
74
61
65 59
68 62
57 47
62 72
67 77
54 64
600
500
50 Hz
60 Hz
400
300
200
100
0
0
700
600
500
400
300
0
1000
1000
2000
2000
3000
3000
4000 5000
Air flow [m³/h]
4000 5000
INDUSTRIAL VENTILATION | 2022 235
2022 | INDUSTRIAL VENTILATION
Parameters
Voltage [V]
Frequency [Hz]
Power [W]
Current [A]
Maximum air flow [m³/h (l/s)]
RPM [min⁻¹]
Sound pressure at 3 m [dBA]
Transported air temperature [°C]
IP rating
Motor IP rating
ErP
Box 60x35 4D
50
510
1.41
2970 (825)
1415
51
-40…+60
3 ~ 230 ∆
IPX4
IP44
2018
60
750
1.44
3410 (947)
1610
53
-40…+60
50
380
0.7
2660 (739)
1235
50
-40…+80
3 ~ 400 Y
60
515
0.93
2730 (758)
1220
50
-40…+40
IPX4
IP44
2018
BOX 60x35 4D
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]
86
88
72
78 82 78 74 76
77 77 78 79 83
43 58 65 67 66
74 73
82 79
61 57
61
67
50
65 75
68 78
51 61
100
0
0
750
650
550
450
350
250
0
600
500
400
300
200
50 Hz
60 Hz
500 1000 1500 2000 2500 3000 3500
Air flow [m³/h]
500 1000 1500 2000 2500 3000 3500
Box 70x40 4D
3~ 400
50
828
1.62
5580
1418
57
-30…+60
IPX4
IP44
2018
Box 80x50 4D
3~ 400
50
1508
2.71
7800
1440
58
-30…+60
IPX4
IP44
2018
BOX 70
x40 4D
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]
87
91
78
78 75 74 74 80 80
74 74 78 82 86 85
56 65 70 70 73 71
77 74
82 78
70 66
66 76
71 81
57 67
700
600
50 Hz
500
400
300
200
100
0
0
900
800
700
600
500
0
1000
1000
2000
2000
3000
3000
4000
4000
5000 6000
Air flow [m³/h]
5000 6000
BOX 80
x50 4D
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]
90
99
79
63 83 79 82 85
64 87 90 94 94
61 75 72 71 70
82 78
90 83
66 58
74
77
52
70 80
78 88
58 68
1600
1400
1200
1000
0
800
700
600
500
400
300
200
100
0
0
50 Hz
1000 2000 3000 4000 5000 6000 7000 8000
Air flow [m³/h]
1000 2000 3000 4000 5000 6000 7000 8000
236 blaubergventilatoren.de
blaubergventilatoren.de
Parameters
Voltage [V]
Frequency [Hz]
Power [W]
Current [A]
Maximum air flow [m³/h (l/s)]
RPM [min⁻¹]
Sound pressure at 3 m [dBA]
Transported air temperature [°C]
IP rating
Motor IP rating
ErP
Box 100x50 4D
3 ~ 400
50
4300
6.8
15000 (4167)
1370
70
-30…+60
IPX4
IP44
2018
BOX 100x50 4D
Sound power level,
A-weighted
L wA
to inlet [dBA]
L wA
to outlet [dBA]
L wA
to environment [dBA]
99
98
90
Total
Octave frequency bands [Hz]
63 125 250 500 1000 2000 4000 8000
LpA
3 m
LpA
1 m
92 96 92 87 89
86 86 87 89 93
55 75 83 86 85
87 86
92 89
78 73
72
74
64
79 89
77 87
70 80
1200
50 Hz
1000
800
600
400
200
0
0
4500
4000
3500
3000
0
2000 4000 6000 8000 10000 12000 14000 16000
Air flow [m³/h]
2000 4000 6000 8000 10000 12000 14000 16000
Box 100x50 6D
3~ 400
50
1198
2.7
10500
900
69
-25…+50
IPX4
IP44
2018
BOX 100x50 6D
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]
92
98
89
65 86 81 85 87
66 89 92 87 89
70 86 82 81 80
85
92
76
80 76
86 79
66 60
72 82
77 87
69 79
500
50 Hz
400
300
200
100
0
0
1400
1200
1000
800
600
0
2000
2000
4000
4000
6000
6000
8000 10000 12000
Air flow [m³/h]
8000 10000 12000
INDUSTRIAL VENTILATION | 2022 237
