Air Moving Solutions.
MODULAR plenum fans
MPQN | MPQS
CATALOG 490
March 2012
PlenumFans
Models
MPQN | MPQS
The MPQN and MPQS offer many of the same
advantages of the venerable EPQN plenum fan. The
MPQN and MPQS can be used as a single fan or in
parallel to construct a multiple fan system. By using
multiple MPQN fans in parallel, sound power levels in
low octave bands can be significantly reduced over
alternative fan selections. In addition, considerable axial
space savings is achieved over a single fan selection.
Twin City Fan & Blower, the world’s largest supplier of
plenum fans, offers the Modular Plenum Fan (MPQN),
AMCA licensed for sound and air.
Sizes
12'' to 49'' wheel diameters
Performance
Inlet View
Airflow to 76,000 CFM
Static pressure to 12" w.g.
Classes
Class II available in sizes 122 to 490.
Class III available in sizes 182 to 490.
See dimensional drawing on page 10.
Fan Application
Plenum fans are unhoused fans designed to operate
inside of field-fabricated or factory-built air handling
units.
The fan wheel pressurizes the entire surrounding air
plenum in which the fan is installed, allowing air
ducts from any direction to be directly connected to
the air handling unit enclosure. This design generally
saves space by eliminating the fan housing, transitions, and diffusers within the air handling unit.
Drive End View
Twin City Fan & Blower certifies that
the Model MPQN Plenum Fans shown
herein are licensed to bear the AMCA
Seal. The ratings shown are based
on tests and procedures performed in
accordance with AMCA Publication 211
and AMCA Publication 311 and comply
with the requirements of the AMCA
Certified Ratings Program.
Refer to Catalog 491 for sound power
levels.
2
Plenum fans have found a ready acceptance in the
air conditioning industry. In addition, the construction
versatility, adaptability in the direction of the discharges, suitability for internal isolation and application of
sound panels, and generally lower cost makes it a
very popular fan arrangement.
The MPQN and MPQS fans, when used in parallel,
can offer further advantages over a standard plenum
fan. By using multiple fans in parallel, uniform flow
can be achieved with less axial length in a given air
handling unit. The use of multiple MPQN fans in parallel can also serve to reduce sound levels, possibly
eliminating the need for additional sound attenuation
within the unit.
Twin City Fan Catalog 490
Arrangements
Arrangement 4 (Horizontal)
Direct drive Arrangement 4 mounts the fan wheel
directly onto the motor shaft. This arrangement provides a compact fan/motor unit which eliminates belt
residue and requires less maintenance than other arrangements.
For these reasons, Arrangement 4 modular plenum
fans are widely used in cleanroom, pharmaceutical,
and other critical applications.
The MPQN and MPQS can be selected to provide desired performance at direct drive, synchronous, motor
speeds. The MPQN and MPQS can also be selected
to operate at peak efficiency at non-synchronous motor speeds, through the use of a variable frequency
drive (VFD).
Compact & Configurable Design
Space and air-handling unit design are often key considerations in the selection of plenum fans, making
the compact, configurable modular Arrangement 4 an
ideal choice.
The Arrangement 4 configuration places the motor
mounting within the framework of the fan itself. This
allows for a simple mounting option for an individual
modular fan within an air-handling unit.
This compact design also allows for easy stacking
and configurable mounting and operating modular
fans in parallel.
FAN
SIZE
122
150
165
182
200
222
245
270
300
330
365
402
445
490
1 x 3 Horizontal Layout
MAXIMUM
STACKING HEIGHT
3
3
3
3
3
3
3
2
2
2
2
1
1
1
3 x 1 Vertical Layout
©2012 Twin City Fan Companies, Ltd. All rights reserved
throughout the world. Catalog illustrations cover the general
appearance of Twin City Fan & Blower products at the time
of publication and we reserve the right to make changes in
design and construction at any time without notice.
www.tcf.com
3
MPQNAdvantage
The MPQN plenum fans offer unique performance
features that are beneficial for many sound sensitive
and higher pressure applications. The fan system is
advantageous by providing uniform air distribution
downstream of the fan, allowing for better air distribution through AHU components. The use of multiple
fans in parallel allows a shorter AHU (in axial direction of flow), and provides redundancy for critical fan
applications.
The MPQN features a 12-bladed airfoil wheel versus
the 8- to 10-bladed wheels with most other competition. The "Q" in the MPQN designates for Better
Noise Quality. Noise quality is a subjective description
for noise that is less objectionable.
The design provides lower sound power levels at
the lower octave bands which are the most difficult
to attenuate. Furthermore, the 12-bladed fan impeller
offers a higher blade pass frequency. This in turn
transfers sound power levels to the higher octave
bands (Figure 1), which allows for easier attenuation
of the noise. Sound levels are often influenced by the
noise occurring at the blade pass frequency (Blade
Pass Frequency = RPM x Number of blades/60). In
many applications, the use of the MPQN design will
move the blade pass frequency from the 2nd octave
band to the 3rd octave band. Acoustic silencers will
normally perform about 10 dB better in the 3rd band.
Outlet Sound Power Level Comparison
Selection Point: 34,000 CFM @ 4"SP
Sound Power Level (LwoA)
100
95
90
n
n
n
n
n
n
n
85
n
n
n
n
80
n
n
75
n
n
70
n
65
1
2
3
4
5
6
Octave Bands
MPQN 182
(3x3)
7
8
EPQN 490
The MPQN offers the benefit of reduced low-frequency casing radiated noise due to the small lattice
structure opening and end reflection. The insulated
housing absorbs some noise generated by the fan,
and the decreased size of the discharge opening
results in a degree of attenuation due to end reflection.
Figure 1 demonstrates the sound comparison between
the single plenum fan and the multi-fan system with
12-bladed wheel and insulated enclosure. The multifan system generates less outlet sound power levels
at the lower frequencies.
Figure 1
4
With the use of the 12-bladed impeller, sound quality
is improved by reducing the change of abrupt sound
levels between neighboring octave bands, providing a
more balanced sound level across the octave bands.
Although the overall A-weighted sound power levels
of a nine-bladed fan may be slightly lower, the sound
"quality" of the 12-bladed MPQN fan may be desirable for the application as it is more pleasing to the
human ear.
Sound
Power
1
2
3
4
5
6
7
8
LwoA
MPQN 182
(3 x 3)
92
90
86
86
81
80
77
77
88
EPQN 490
96
97
96
89
88
83
75
69
93
Twin City Fan Catalog 490
ConstructionFeatures
Wheels
High efficiency, non-overloading airfoil wheels are provided on all sizes. Aluminum wheels using extruded
aluminum blades are standard, a popular choice for
applications requiring precision balance and improved
reliability.
Inlet Cones
Heavy-gauge, spun steel inlet cones are closely
matched to the wheel intake rim to ensure efficient
and quiet operation.
Serviceability
Class II MPQN and MPQS fans feature a bolt-on motor base allowing for easy service by sliding out the
motor/impeller assembly.
Structural Frame
Frames are constructed of heavy-gauge steel, continuously welded at all connections for maximum strength
and rigidity. Mounting the MPQN and MPQS as a
parallel system allows for low vibration levels due to
the unique individual rigid housings and
vibration dampening gasket mounted between the fans.
Sound Insulation (MPQN only)
The sheet metal module encloses sound insulation for sound attenuation. Insulation is protected
with both a vapor barrier for IAQ (indoor air quality)
and galvanized, perforated steel maintaining sound
attenuation while preventing insulation shedding on
the air path side.
Isolation
Sizes 122-270 are designed to operate at adequate
vibration levels where spring isolation is not essential. All sizes are designed to mount directly onto
spring isolators when vibration isolation is preferred.
Twin City Fan & Blower Engineering can also provide
custom vibration isolation solutions for parallel fan
systems.
FlowMeasurementSystem
Piezometer Ring
(Airflow Measuring System)
A piezometer ring is available on plenum fans, as well
as other Twin City Fan housed fans, as part of an
airflow measuring system, based on the principle of a
flow nozzle. The inlet cone of the fan is used as the
flow nozzle. The flow can be calculated by measuring
the pressure drop through the inlet cone. No tubes
or sensors are inserted in the high velocity airstream
which could obstruct airflow.
The system consists of a piezometer ring mounted at
the throat and a static pressure tap mounted on the
face of the inlet cone. A differential pressure transducer and digital display can also be provided.
The pressure drop is measured from the tap located
on the face of the inlet cone to the piezometer ring
in the throat. The inlet tap is connected to the high-
Piezometer Ring
Mounted at Throat
of Inlet Cone
pressure side of the transducer and the piezometer
ring is connected to the low-pressure side. See diagram on right.
Based on Twin City Fan laboratory tests, the system
was determined to be accurate within +/-5%.
Refer to Twin City Fan Engineering Supplement ES-105.
NOTE: Twin City Fan does not recommend placement
of flow measuring probes inside the fan inlet cone in
the path of airflow. These devices create disturbances
and unpredictable performance losses. Twin City Fan
will not be responsible for loss of performance due to
such devices.
Accessories
Inlet Screen
Heavy-gauge barbecue grill style inlet screen that
nests in the inlet funnel for personnel protection on
non-ducted inlets.
Isolation Gasket
Isolation gaskets designed to separate MPQN or
MPQS fans from one other when used in parallel are
standard accessories on all MPQN and MPQS fans
when specified.
Shaft Grounding Ring (SGR)
Recommended for all MPQN and MPQS fans, a shaft
grounding ring is mounted to the motor providing
motor bearing protection. By diverting variable frequency drive (VFD) induced stray voltages to ground
through the shaft grounding ring instead of the motor
bearings, motor life is extended.
www.tcf.com
5
EngineeringData
Maximum RPM, Wheel Weights, & WR2
FAN
SIZE
WHEEL
DIA.
(IN.)
122
150
165
182
200
222
245
270
300
330
365
402
445
490
12.40
13.98
15.75
18.25
20.00
22.25
24.50
27.00
30.00
33.00
36.50
40.25
44.50
49.00
CLASS II
MAX.
RPM
(70°F)
3800
3800
3468
2930
2674
2403
2183
1981
1783
1620
1465
1329
1202
1091
Bare Fan Weights
CLASS III
WT.
(LB)
WR2
(LB-FT)
9
12
15
18
21
30
35
40
54
67
79
93
135
164
0.9
1.7
2.9
6.1
7.4
12
21
29
51
76
112
165
253
391
MAX.
RPM
(70°F)
N/A
N/A
N/A
3767
3438
3090
2806
2546
2291
2083
1884
1708
1545
1403
WT.
(LB)
WR2
(LB-FT)
N/A
N/A
N/A
21
24
34
38
47
58
72
84
98
142
174
N/A
N/A
N/A
6.2
9.3
15
22
32
52
77
114
166
256
535
FAN
SIZE
122
150
165
182
200
222
245
270
300
330
365
402
445
490
WHEEL
DIA.
(IN.)
12.40
13.98
15.75
18.25
20.00
22.25
24.50
27.00
30.00
33.00
36.50
40.25
44.50
49.00
CLASS II CLASS III
149
173
250
337
423
505
681
810
997
1200
1506
1936
2363
2939
N/A
N/A
N/A
373
467
555
748
944
1164
1397
1738
2347
2792
3482
NOTE:
Weights do not include motor.
PerformanceData
Wheel Diameter: 12.40"
Outlet Area: 2.40 ft2
122 MPQN/MPQS
CFM
1000
1100
1200
1400
1600
1800
2000
2200
2400
2800
3200
3600
1" SP
RPM BHP
417 1751 0.25
458 1838 0.28
500 1926 0.31
583 2113 0.39
667 2313 0.49
750 2521 0.61
833 2735 0.75
917 2954 0.91
1000 3176 1.10
1167 3628 1.56
1333
1500
OV
MAXIMUM RPM:
2" SP
RPM BHP
2146 0.46
2220 0.51
2297 0.57
2465 0.69
2638 0.82
2818 0.96
3009 1.13
3208 1.33
3413 1.55
3" SP
4" SP
5" SP
6" SP
7" SP
8" SP
9" SP
10" SP
12" SP
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
2612
2760
2921
3092
3266
3447
3636
0.84
0.99
1.15
1.34
1.54
1.77
2.02
3025
3174
3333
3503
3675
1.30
1.50 3405 1.85
1.72 3557 2.11 3765 2.51
1.96 3716 2.39
2.22
CLASS II = 3800
Wheel Diameter: 13.98"
Outlet Area: 3.07 ft2
150 MPQN/MPQS
CFM
1200
1400
1600
1800
2200
2600
3000
3400
3800
4200
4600
5000
1" SP
RPM BHP
391 1502 0.29
456 1621 0.35
521 1744 0.42
587 1875 0.51
717 2156 0.72
847 2450 0.99
978 2755 1.34
1108 3066 1.77
1238 3382 2.30
1369
1499
1629
OV
MAXIMUM RPM:
Fan Efficiency Grade: FEG75
Max. BHP = 0.087 x (RPM / 1000)3
2" SP
3" SP
4" SP
5" SP
6" SP
7" SP
8" SP
9" SP
10" SP
12" SP
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
1960
2068
2185
2427
2689
2969
3259
3558
0.65
0.76
0.88
1.15
1.49
1.90
2.40
2.99
2340
2445
2674
2914
3170
3442
3726
1.11
1.27
1.62
2.02
2.49
3.05
3.71
2679
2889
3123
3364
3618
1.67
2.08
2.56
3.10
3.72
3091
3310
3547
3789
2.57 3279 3.06
3.11 3487 3.67 3656 4.25
3.73 3715 4.36
4.42
CLASS II = 3800
Class II = First white section
Class III = Blue shaded section
Underlined figures indicate Maximum Static Efficiency
6
Fan Efficiency Grade: FEG80
Max. BHP = 0.047 x (RPM / 1000)3
Performance certified is for installation Type A; Free inlet, Free outlet.
Power rating (BHP) does not include transmission losses.
Performance ratings do not include the effects of appurtenances (accessories).
Model MPQS is not licensed to bear the AMCA seal.
Twin City Fan Catalog 490
CFM
1500
1700
1900
2100
2500
2900
3300
3700
4500
5300
6100
6900
1" SP
RPM BHP
386 1327 0.36
438 1411 0.42
489 1496 0.49
541 1584 0.57
644 1774 0.75
747 1975 0.98
850 2183 1.26
953 2396 1.60
1159 2834 2.49
1365
1571
1777
OV
MAXIMUM RPM:
2" SP
3" SP
4" SP
5" SP
6" SP
7" SP
8" SP
9" SP
10" SP
12" SP
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
1715
1790
1869
2035
2209
2395
2590
3000
3425
0.79
0.90
1.01
1.26
1.55
1.89
2.29
3.31
4.65
2041
2107
2259
2425
2594
2773
3157
1.32
1.47
1.79
2.16
2.56
3.03
4.17
2461
2614
2780
2948
3307
2.33
2.77
3.26
3.79
5.05
2648
2791
2946
3112
3454
1" SP
RPM BHP
2500 480 1146 0.62
2800 538 1217 0.72
3100 595 1292 0.83
3400 653 1370 0.96
4000 768 1530 1.26
4600 884 1697 1.62
5200 999 1868 2.07
5800 1114 2043 2.62
7000 1345 2399 4.01
8200 1575
9400 1806
10600 2036
OV
MAXIMUM RPM:
Wheel Diameter: 18.25"
Outlet Area: 5.21 ft2
2" SP
RPM BHP
1413 1.19
1465 1.34
1524 1.49
1590 1.67
1731 2.07
1883 2.53
2041 3.08
2204 3.72
2541 5.31
2888 7.40
3243 10.06
3604 13.38
1692
1736
1788
1911
2047
2195
2349
2670
3005
3350
3701
CLASS II = 2930
1" SP
RPM BHP
3000 480 1045 0.74
3400 544 1117 0.88
3800 608 1194 1.03
4200 672 1273 1.20
4600 736 1354 1.40
5400 864 1522 1.87
6200 992 1695 2.46
7000 1120 1872 3.18
7800 1248 2051 4.05
9400 1504 2417 6.31
11000 1760
12600 2016
OV
MAXIMUM RPM:
2" SP
RPM BHP
1289 1.43
1342 1.62
1403 1.84
1471 2.08
1542 2.34
1694 2.94
1853 3.65
2018 4.50
2187 5.50
2536 8.03
2894 11.38
3259 15.67
2.02
2.22
2.43
2.92
3.48
4.13
4.86
6.65
8.93
11.79
15.31
1977
2079
2202
2338
2483
2792
3116
3451
3.25
3.82
4.48
5.22
6.04
8.03
10.51
13.56
2241
2349
2475
2611
2907
3221
3547
OV
3500
4000
4500
5000
6000
7000
8000
9000
10000
12000
14000
16000
452
517
582
646
776
905
1034
1164
1293
1551
1810
2069
MAXIMUM RPM:
2" SP
RPM BHP
1141 1.68
1185 1.90
1238 2.16
1297 2.45
1427 3.11
1568 3.90
1714 4.85
1865 5.97
2020 7.29
2338 10.62
2665 15.02
2997 20.64
2398
2492
2605
2734
3016
3322
3641
5.76
6.57
7.49
8.53
10.89
13.75
17.19
2631
2733
2852
3121
3418
3731
7.69
8.68
9.79
12.36
15.40
19.05
2767
2859
2967
3225
3512
Wheel Diameter: 20.00"
Outlet Area: 6.25 ft2
8.84
9.92
11.09
13.87
17.11
2980
3081
3325
3602
11.17
12.43
15.38
18.81
3101
3194
3423
3691
12.48
13.83 3411 16.66
16.91 3614 20.06
20.55
Fan Efficiency Grade: FEG71
Max. BHP = 0.672 x (RPM / 1000)3
3" SP
4" SP
5" SP
6" SP
7" SP
8" SP
9" SP
10" SP
12" SP
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
1548
1594
1648
1710
1846
1994
2151
2312
2646
2993
3348
CLASS II = 2674
1" SP
RPM BHP
913 0.86
977 1.02
1045 1.20
1116 1.40
1264 1.90
1417 2.53
1576 3.32
1737 4.28
1901 5.44
2234 8.44
4.77
5.50
6.35
7.27
9.44
12.11
15.35
CLASS III = 3767
2.45
2.72
3.01
3.33
4.06
4.90
5.89
7.02
9.80
13.41
17.97
1776
1817
1869
1989
2125
2273
2428
2750
3087
3434
3.67
4.01
4.39
5.23
6.21
7.32
8.58
11.62
15.49
20.31
1982
2021
2125
2250
2388
2536
2849
3176
5.08
5.50
6.45
7.54
8.79
10.17
13.48
17.59
2171
2258
2370
2500
2640
2943
3263
6.68
7.72
8.92
10.29
11.81
15.37
19.75
2386
2488
2608
2741
3033
3346
9.04
10.35
11.83
13.48
17.29
21.93
2514
2603
2713
2840
3120
3427
10.42
11.83
13.40
15.19
19.25
24.15
2714
2816
2935
3206
13.32
15.01
16.90
21.25
2825
2919
3029
3290
14.89
16.69 3116 20.10
18.65 3214 22.29
23.27
CLASS III = 3438
Wheel Diameter: 22.25"
Outlet Area: 7.74 ft2
222 MPQN/MPQS
CFM
Fan Efficiency Grade: FEG71
Max. BHP = 0.425 x (RPM / 1000)3
3" SP
4" SP
5" SP
6" SP
7" SP
8" SP
9" SP
10" SP
12" SP
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
200 MPQN/MPQS
CFM
2.90
3.40 2954 4.04 3118 4.72
3.95 3103 4.66 3253 5.39 3394 6.12
4.57 3262 5.35 3404 6.14
5.96
CLASS II = 3468
182 MPQN/MPQS
CFM
Fan Efficiency Grade: FEG75
Max. BHP = 0.157 x (RPM / 1000)3
PerformanceData
Wheel Diameter: 15.75"
Outlet Area: 3.88 ft2
165 MPQN/MPQS
Fan Efficiency Grade: FEG71
Max. BHP = 1.146 x (RPM / 1000)3
3" SP
4" SP
5" SP
6" SP
7" SP
8" SP
9" SP
10" SP
12" SP
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
1379
1415
1461
1574
1701
1839
1982
2129
2436
2752
3076
CLASS II = 2403
2.91
3.22
3.57
4.39
5.35
6.46
7.74
9.22
12.88
17.60
23.56
1617
1711
1826
1953
2090
2232
2527
2835
4.79
5.73
6.85
8.12
9.56
11.21
15.18
20.23
1843
1944
2063
2191
2328
2614
2914
7.15
8.39
9.84
11.44
13.25
17.54
22.91
1971
2060
2168
2289
2419
2698
2990
8.63
10.01
11.58
13.36
15.33
19.95
25.63
2172
2270
2384
2508
2777
3064
11.68
13.38
15.32
17.46
22.37
28.39
2281
2370
2476
2595
2854
13.41
15.24
17.31
19.62
24.86
2391
2469
2566
2679
2930
15.22
17.17
19.34
21.80
27.40
2564
2656
2761
3003
19.12 2757 23.25
21.45 2829 25.77
24.01 2923 28.60
29.94
CLASS III = 3090
Class II = First white section
Class III = Blue shaded section
Underlined figures indicate Maximum Static Efficiency
Performance certified is for installation Type A; Free inlet, Free outlet.
Power rating (BHP) does not include transmission losses.
Performance ratings do not include the effects of appurtenances (accessories).
Model MPQS is not licensed to bear the AMCA seal.
www.tcf.com
7
PerformanceData
Wheel Diameter: 24.50"
Outlet Area: 9.38 ft2
245 MPQN/MPQS
CFM
OV
4400
5000
5600
6200
7400
8600
9800
11000
12200
14600
17000
19400
469
533
597
661
789
917
1045
1173
1301
1557
1813
2068
1" SP
RPM BHP
813 1.02
866 1.21
923 1.41
983 1.64
1110 2.20
1244 2.90
1381 3.76
1519 4.80
1658 6.04
1938 9.19
MAXIMUM RPM:
2" SP
3" SP
4" SP
5" SP
6" SP
7" SP
8" SP
9" SP
10" SP
12" SP
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
1059
1101
1148
1255
1373
1498
1629
1764
2039
2315
2595
2.28
2.57
2.89
3.63
4.51
5.57
6.80
8.26
11.88
16.52
22.41
1264
1302
1391
1494
1608
1729
1856
2122
2396
2671
CLASS II = 2183
3.83
4.24
5.15
6.21
7.44
8.87
10.51
14.52
19.64
25.95
1520
1610
1713
1826
1945
2199
2466
2740
6.76
7.98
9.39
11.00
12.82
17.22
22.71
29.50
1640
1723
1815
1919
2032
2274
2533
2802
OV
5000
5800
6600
7400
8200
9000
10600
12200
13800
17000
20200
23400
439
509
579
650
720
790
931
1071
1211
1492
1773
2054
1" SP
RPM BHP
717 1.15
767 1.38
823 1.64
882 1.94
944 2.29
1008 2.68
1142 3.62
1279 4.81
1416 6.26
1695 10.10
1977 15.39
MAXIMUM RPM:
OV
6000
7000
8000
9000
10000
11000
13000
15000
17000
21000
25000
29000
427
498
569
640
711
782
924
1067
1209
1493
1778
2062
MAXIMUM RPM:
947
988
1034
1085
1139
1258
1383
1515
1787
2062
2340
2.64
3.02
3.44
3.90
4.40
5.61
7.05
8.77
13.20
19.11
26.76
1174
1217
1263
1366
1481
1603
1864
2136
2410
5.05
5.64
6.27
7.68
9.37
11.34
16.29
22.81
31.06
1339
1380
1471
1575
1689
1936
2200
2472
7.47
8.22
9.88
11.79
14.00
19.45
26.46
35.31
1489
1572
1666
1772
2007
2261
2529
MAXIMUM RPM:
2103
2188
2280
2491
2726
17.86
20.16
22.66
28.47
35.48
2194
2273
2360
2560
2788
20.10
22.60 2354 25.05
25.26 2439 27.93 2589 33.35
31.39 2629 34.38 2765 40.51
38.76
Fan Efficiency Grade: FEG71
Max. BHP = 3.131 x (RPM / 1000)3
10.25
12.15
14.29
16.73
22.67
30.17
39.58
1668
1755
1852
2076
2321
14.50
16.88
19.52
25.94
33.95
1760
1841
1932
2143
2381
16.91
19.53
22.42
29.25
37.79
1924
2010
2210
2440
22.25
25.38
32.69
41.69
2003
2086
2275
2497
24.99
28.41 2159 31.46 2301 37.73
36.14 2340 39.68 2467 46.92
45.60
Fan Efficiency Grade: FEG71
Max. BHP = 5.296 x (RPM / 1000)3
2" SP
3" SP
4" SP
5" SP
6" SP
7" SP
8" SP
9" SP
10" SP
12" SP
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
847
884
925
970
1020
1127
1241
1361
1609
1860
2113
3.19
3.66
4.17
4.73
5.37
6.85
8.64
10.78
16.31
23.73
33.33
1052
1090
1132
1225
1330
1441
1678
1926
2176
6.15
6.86
7.65
9.40
11.51
13.96
20.13
28.29
38.67
1201
1238
1320
1414
1518
1743
1984
2232
9.12
10.05
12.10
14.46
17.22
24.03
32.83
43.95
1337
1411
1496
1593
1807
2039
2283
12.54
14.89
17.53
20.60
28.01
37.43
49.23
1498
1577
1665
1869
2093
17.79
20.74
24.03
32.05
42.11
1581
1654
1737
1930
2146
20.72
23.98
27.60
36.18
46.81
1729
1807
1989
2199
27.35
31.24
40.35
51.64
1801
1876
2048
2251
30.75
34.99 1942 38.77 2070 46.50
44.64 2106 48.99 2221 57.98
56.53
CLASS III = 2291
Wheel Diameter: 33.00"
Outlet Area: 17.02 ft2
Fan Efficiency Grade: FEG71
Max. BHP = 8.539 x (RPM / 1000)3
2" SP
3" SP
4" SP
5" SP
6" SP
7" SP
8" SP
9" SP
10" SP
12" SP
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
784
844
915
994
1078
1166
1350
1538
1726
1917
4.10
5.10
6.29
7.70
9.37
11.31
16.15
22.44
30.31
40.11
959
1019
1087
1163
1244
1416
1599
1786
1974
CLASS II = 1620
7.51
9.00
10.70
12.67
14.92
20.35
27.32
35.99
46.53
1116
1176
1243
1318
1481
1655
1838
2025
11.85
13.84
16.06
18.62
24.72
32.26
41.59
52.91
1261
1322
1390
1543
1710
1887
2071
17.11
19.64
22.46
29.13
37.33
47.26
59.25
1341
1398
1461
1604
1764
1935
20.48
23.32
26.46
33.67
42.46
53.04
1471
1529
1663
1817
1983
27.12
30.49
38.28
47.69
58.92
1541
1596
1722
1869
2030
30.98
34.69
43.05
53.02
64.84
1660
1780
1920
2076
38.95 1723 43.30
47.91 1837 52.85 1947 62.96
58.42 1970 63.89 2070 75.21
70.82
CLASS III = 2083
Class II = First white section
Class III = Blue shaded section
Underlined figures indicate Maximum Static Efficiency
8
13.73
15.65
17.77
20.12
25.57
32.21
Wheel Diameter: 30.00"
Outlet Area: 14.06 ft2
CLASS II = 1783
1" SP
RPM BHP
7000 411 573 1.61
8000 470 604 1.86
9000 529 640 2.16
11000 646 719 2.88
13000 764 805 3.77
15000 882 896 4.89
17000 999 989 6.24
19000 1117 1083 7.85
23000 1352 1272 11.96
27000 1587 1464 17.48
31000 1822
35000 2057
OV
1933
2011
2100
2199
2420
2662
CLASS III = 2546
330 MPQN/MPQS
CFM
11.76
13.51
15.46
17.62
22.74
28.99
2" SP
3" SP
4" SP
5" SP
6" SP
7" SP
8" SP
9" SP
10" SP
12" SP
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
CLASS II = 1981
1" SP
RPM BHP
639 1.38
683 1.66
733 1.98
786 2.34
842 2.77
901 3.25
1023 4.42
1147 5.89
1272 7.69
1526 12.48
1783 19.11
1829
1915
2011
2116
2348
2597
Wheel Diameter: 27.00"
Outlet Area: 11.39 ft2
300 MPQN/MPQS
CFM
8.42
9.85
11.41
13.19
15.20
19.96
25.84
33.02
CLASS III = 2806
270 MPQN/MPQS
CFM
Fan Efficiency Grade: FEG71
Max. BHP = 1.926 x (RPM / 1000)3
Performance certified is for installation Type A; Free inlet, Free outlet.
Power rating (BHP) does not include transmission losses.
Performance ratings do not include the effects of appurtenances (accessories).
Model MPQS is not licensed to bear the AMCA seal.
Twin City Fan Catalog 490
1" SP
RPM BHP
8000 384 499 1.79
9200 442 528 2.11
10400 500 559 2.45
11600 557 594 2.87
14000 673 667 3.83
16400 788 745 5.04
18800 903 826 6.53
23800 1143 1000 10.69
28400 1364 1166 16.12
33200 1595
38000 1826
42800 2056
CFM
OV
MAXIMUM RPM:
2" SP
3" SP
4" SP
5" SP
6" SP
7" SP
8" SP
9" SP
10" SP
12" SP
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
685
712
772
840
912
1073
1230
1398
1570
1745
4.64
5.20
6.52
8.11
9.97
14.91
21.04
29.34
39.95
53.20
868
926
991
1141
1290
1452
1619
1789
CLASS II = 1465
9.43
11.33
13.54
19.32
26.17
35.20
46.57
60.54
1007
1065
1205
1347
1503
1665
1831
14.72
17.25
23.78
31.42
41.19
53.24
67.93
1082
1137
1266
1401
1552
1710
1872
1" SP
RPM BHP
10000 395 457 2.24
11500 454 484 2.64
13000 514 515 3.11
16000 632 581 4.22
19000 751 652 5.61
22000 869 727 7.36
25000 988 804 9.51
28000 1106 882 12.09
34000 1343 1043 18.90
40000 1580
46000 1817
52000 2054
OV
MAXIMUM RPM:
1" SP
RPM BHP
12000 388 411 2.70
13800 446 435 3.17
15600 504 461 3.70
17400 562 490 4.33
21000 679 550 5.77
24600 795 615 7.61
28200 911 682 9.86
35400 1144 821 15.94
42600 1377 964 24.49
49800 1610
57000 1842
64200 2075
MAXIMUM RPM:
627
680
741
807
877
950
1102
1258
1418
1581
5.80
7.33
9.19
11.41
14.02
17.09
24.82
34.97
48.05
64.53
769
822
881
945
1013
1156
1307
1462
1621
10.70
12.99
15.64
18.72
22.29
30.89
42.00
56.01
73.46
898
950
1009
1072
1209
1354
1505
1659
17.02
20.05
23.57
27.55
37.25
49.28
64.23
82.42
1016
1070
1129
1259
1398
1545
1697
MAXIMUM RPM:
29.36
37.96
47.53
59.70
74.06
1439
1555
1691
1837
24.65
28.60
33.01
43.61
56.56
72.44
91.71
1077
1129
1183
1307
1442
1585
29.39
33.81
38.56
50.03
64.08
80.95
1185
1237
1354
1484
1623
39.12
44.40
56.63
71.55
89.41
1238
1289
1399
1525
1661
Wheel Diameter: 44.50"
Outlet Area: 30.94 ft2
42.92
53.14
65.97
81.23
1493
1603
1735
1877
47.96 1544 53.11
58.77 1651 64.59 1745 76.58
72.32 1778 78.75 1862 91.95
88.28
Fan Efficiency Grade: FEG75
Max. BHP = 23.54 x (RPM / 1000)3
44.59
50.33
63.28
79.10
98.06
1338
1444
1565
1697
56.34 1385 62.45
70.19 1488 77.20 1573 91.47
86.74 1605 94.63 1681 110.47
106.54
Fan Efficiency Grade: FEG75
Max. BHP = 38.85 x (RPM / 1000)3
2" SP
3" SP
4" SP
5" SP
6" SP
7" SP
8" SP
9" SP
10" SP
12" SP
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
564
586
636
692
752
881
1016
1156
1298
1443
6.97
7.81
9.80
12.19
15.02
22.22
31.85
44.56
60.66
80.86
714
763
817
936
1065
1199
1338
1479
CLASS II = 1202
1" SP
RPM BHP
16000 426 387 3.63
18000 480 408 4.19
20000 533 431 4.83
24000 640 481 6.38
28000 746 534 8.26
32000 853 589 10.54
36000 960 645 13.26
44000 1173 761 20.39
52000 1386 881 30.20
60000 1599
68000 1813
76000 2026
OV
1269
1383
1505
1646
1795
CLASS III = 1708
14.13
17.05
20.39
28.72
39.52
53.21
70.60
91.89
829
878
989
1111
1241
1375
1513
22.11
26.01
35.41
47.34
62.24
80.51
102.92
890
936
1039
1156
1281
1412
27.39
31.81
42.20
55.35
71.39
90.87
991
1087
1199
1320
1447
37.80
49.17
63.40
80.69
101.23
1043
1134
1240
1358
1482
43.98
56.36
71.46
90.07
111.9
1180
1281
1394
1515
63.75 1225 71.36 1267 79.05
79.89 1321 88.48 1360 97.16 1436 114.94
99.31 1430 108.83 1465 118.43 1534 138.30
122.36
CLASS III = 1545
Wheel Diameter: 49.00"
Outlet Area: 37.52 ft2
490 MPQN/MPQS
CFM
25.17
33.06
42.07
53.52
67.05
2" SP
3" SP
4" SP
5" SP
6" SP
7" SP
8" SP
9" SP
10" SP
12" SP
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
CLASS II = 1329
OV
1204
1325
1454
1600
1753
Wheel Diameter: 40.25"
Outlet Area: 25.31 ft2
445 MPQN/MPQS
CFM
18.27
21.17
28.34
36.68
47.29
60.13
75.47
CLASS III = 1884
402 MPQN/MPQS
CFM
Fan Efficiency Grade: FEG75
Max. BHP = 14.43 x (RPM / 1000)3
PerformanceData
Wheel Diameter: 36.50"
Outlet Area: 20.82 ft2
365 MPQN/MPQS
Fan Efficiency Grade: FEG75
Max. BHP = 62.95 x (RPM / 1000)3
2" SP
3" SP
4" SP
5" SP
6" SP
7" SP
8" SP
9" SP
10" SP
12" SP
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
522
562
607
656
707
815
928
1044
1162
1283
8.94
11.05
13.53
16.48
19.85
28.21
39.19
53.24
70.76
92.53
635
673
717
764
864
972
1084
1199
1316
CLASS II = 1091
16.10
19.08
22.63
26.65
36.25
48.51
63.80
82.68
105.54
736
774
817
911
1014
1122
1233
1348
25.06
29.04
33.64
44.49
58.12
74.64
94.53
118.77
829
868
956
1054
1158
1267
1379
35.80
40.94
52.92
67.77
85.57
106.93
132.25
880
917
999
1093
1194
1299
42.82
48.46
61.52
77.60
96.88
119.27
963
1041
1131
1228
1331
56.18
70.41
87.65
108.01
131.99
1082
1167
1262
1362
79.48
97.65
119.48
144.69
1123
1203
1294
1392
89.00 1161 98.40
108.07 1238 118.56 1307 140.27
130.73 1326 142.34 1389 166.37
157.35
CLASS III = 1403
Class II = First white section
Class III = Blue shaded section
Underlined figures indicate Maximum Static Efficiency
Performance certified is for installation Type A; Free inlet, Free outlet.
Power rating (BHP) does not include transmission losses.
Performance ratings do not include the effects of appurtenances (accessories).
Model MPQS is not licensed to bear the AMCA seal.
www.tcf.com
9
DimensionalData
Horizontal, Arr. 4 - Class II
G
'ME' MAX
APPROX.
D
U
U
'FR'
MAX MOTOR
G
‘R’ HOLES EQ
SP @ ‘S’
(NOTE 3)
D
0.63
(NOTE 3)
DRIVE END VIEW
‘V’
TYP
H
NOTES:
1. Horizontal application only.
2. CW rotation is standard, CCW rotation is optional. Rotation is
determined by viewing the drive end.
3. Mounting hole pattern typical on inlet and drive end on all four
sides. 3/8" diameter mounting hardware suggested. See IOM-110
for fan installation instructions.
INLET END VIEW
4. Model MPQN provides acoustically insulated housing with perforated plate separating insulation from airstream.
Model MPQS is identical to MPQN with the exception of the
acoustical insulation and perforated plate.
SIZE
G
D
H
'R'
PER SIDE
S
U
V
122
150
165
182
200
222
245
270
300
330
365
402
445
490
23.00
25.38
28.06
31.81
34.50
39.81
43.25
46.94
51.50
55.94
61.25
68.81
75.25
81.94
11.50
12.69
14.06
15.94
17.25
19.94
21.63
23.50
25.75
28.00
30.63
34.44
37.63
41.00
20.00
21.00
23.63
27.38
30.00
33.38
36.75
40.50
45.00
49.50
54.75
60.38
66.75
73.50
2
2
3
3
3
3
3
4
4
4
5
5
5
5
16.81
19.19
10.94
12.75
14.13
17.81
19.50
14.25
15.75
17.25
14.25
15.63
17.25
18.94
1.13
1.13
1.13
1.13
1.13
1.75
1.75
1.75
1.75
1.75
2.25
2.25
2.25
2.25
3.13
3.13
3.13
3.13
3.13
2.13
2.13
2.13
2.13
2.13
2.13
3.13
3.13
3.13
'ME'
MAX
REF
2.25
6.25
4.81
8.56
7.19
5.44
6.84
5.00
5.50
3.25
5.69
3.13
0.13
1.38
MAX
'FR'
184T
213T
215T
254T
254T
256T
284T
286T
324T
326T
405T
405T
405T
444T
BC1003160E
DIMENSIONS ARE SUBJECT TO CHANGE. CERTIFIED DRAWINGS AVAILABLE UPON REQUEST.
10
Twin City Fan Catalog 490
PERFORMANCE — Fans shall be tested in accordance with ANSI/AMCA Standard 210 (air performance) and 300
(sound performance) in an AMCA accredited laboratory. Performance ratings (MPQN only) shall conform to AMCA
Standard 205 (fan efficiency grade), Publication 211 (air performance) and Publication 311 (sound performance).
Fans (MPQN only) shall be licensed to bear the AMCA certified ratings seal for both sound and air, and fan efficiency grade (FEG). Sound certification shall apply to both inlet and outlet sound power levels.
Fans shall have a sharply rising pressure characteristic extending through the operating range and continuing to
rise beyond the peak efficiency to ensure quiet and stable operation. Fans shall have a non-overloading design
with self-limiting horsepower characteristics and shall reach a peak in the normal selection area. All fans shall be
capable of operating over the minimum pressure class limits as specified in AMCA Standard 99.
CONSTRUCTION — Fans shall be designed without a scroll type housing and shall incorporate a non-overloading type backward inclined airfoil blade wheel, heavy-gauge reinforced steel inlet plate and structural steel frame.
TypicalSpecifications
Fans shall be Model MPQN or MPQS centrifugal plenum (plug) type, as manufactured by Twin City Fan & Blower,
Minneapolis, Minnesota.
INSULATION (MPQN Only) — Fans shall be provided with a minimum of 2” acoustical insulation. Insulation shall
be protected on the airstream side with a non-friable vapor barrier preventing insulation shedding for IAQ (indoor air
quality). Galvanized, perforated steel shall be located on the airstream side of the vapor barrier providing additional
protection without sacrificing air and sound performance.
FRAME AND INLET PANEL — Inlet panels shall be of heavy-gauge reinforced steel construction. The inlet panel
incorporates a removable spun inlet cone designed for smooth airflow into the accompanying inlet retaining ring
of the fan wheel. A square, formed lip suitable for attachment of a boot connector shall surround the unit.
WHEEL — Wheels shall have a spun non-tapered style blade retaining ring on the inlet side to allow higher efficiencies over the performance range of the fan. Wheels shall have airfoil-shaped extruded aluminum blades. All
hollow blade wheels shall be continuously welded around all edges. Wheels shall have twelve blades for better
sound quality. All wheels shall be statically and dynamically balanced on precision electronic balancers to a Balance Quality Grade G6.3 per ANSI/AMCA 204 or better.
FINISH AND COATING — The entire fan assembly shall be thoroughly degreased and deburred before application of a rust-preventative coating. Aluminum components shall be unpainted.
FACTORY RUN TEST — All fans prior to shipment shall be completely assembled and test run as a unit at
the specified operating speed or maximum RPM allowed for the particular construction type. Maximum vibration
shall be within the limits of ANSI/AMCA 204 Fan Application Category BV-4. Balance readings shall be taken by
electronic type equipment in the axial, vertical, and horizontal directions on each of the bearings. Records shall
be maintained and a written copy shall be available upon request.
GUARANTEE — The manufacturer shall guarantee the workmanship and materials for its MPQN fans for at least
one (1) year from startup or eighteen (18) months from shipment, whichever occurs first.
www.tcf.com
11
Industrial & Commercial Fans
Centrifugal Fans | Utility Sets | Plenum & Plug Fans | Inline Centrifugal Fans
Mixed Flow Fans | Tubeaxial & Vaneaxial Fans | Propeller Wall Fans | Propeller Roof Ventilators
Centrifugal Roof & Wall Exhausters | Ceiling Ventilators | Gravity Ventilators | Duct Blowers
Radial Bladed Fans | Radial Tip Fans | High Efficiency Industrial Fans | Pressure Blowers
Laboratory Exhaust Fans | Filtered Supply Fans | Mancoolers | Fiberglass Fans | Custom Fans
Twin city fan & blower | www.tcf.com
Twin City Fan Companies, Ltd.
A Twin
City Fan Company
.25MWG06/12
5959 Trenton Lane N | Minneapolis, MN 55442 | Phone: 763-551-7600 | Fax: 763-551-7601