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Greenheck Fan
QEM, QEP
manual
Plenum Fans
Models:
QEM
QEP
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Dimension
Standard Construction Features
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Plenum Fans
Models QEM and QEP
Belt and Direct Drive
September
2008
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Contents
Plenum Fans
Advantages of the QEM vs. QEP
Quiet & Efficient Plenum Fans
Plenum Model Number Code
QEM arrangement 9 belt drive
Advantages of 12-Blade Wheels
Performance Comparison Vs -Blade Wheels
Air Performance
Sound Performance
QEM Arrangement Motor on Right QEP Arrangement
Standard Construction Features
Standard Construction and Features
Optional Construction
Optional Construction & Accessories
Arrangements
QEM Arrangement 9 Horizontal, Motor on Frame Side Sizes
Left Top Right
QEM Arrangement 4 Horizontal, Direct Drive Sizes
Available Motor on Frame Positions
Air Plenum Design Guidelines
System Considerations
Duct System Effect
Effects of Air Density
Plenum Exit Velocity ft/min
Airstream Temperature Variations
100
Direct Drive Selections
1770 RPM 60 Hz
Plenum Size
Plenum Size Plenum Size
Maximum rpm 2786
QEP Class Maximum rpm Maximum rpm 3900
RPM #1 3600 1730 1726 1949
2146 2328 4000 1923 2076 2264
Maximum rpm 2668
QEP Class Maximum rpm
3735 3504
1478
Maximum rpm 2327
QEP Class Maximum rpm 3409
RPM #1
1428
Maximum rpm 2190
QEP Class Maximum rpm
3065 2824
1041
Maximum rpm 1960
QEP Class Maximum rpm 2744
1087
1389
Maximum rpm 1701
QEP Class Maximum rpm 2382
2107
10000 1801 1006
2144 1946
QEP Class Maximum rpm 2144
2189 1042
10.2
Maximum rpm 1392
QEP Class Maximum rpm Maximum rpm 1949
14000 1688 788
908 1016 1116 12.0 1208
Maximum rpm 1229
QEP Class Maximum rpm Maximum rpm 1720
RPM #1 18000 1773 717 822 916 11.7 1001 1083
20000 1970 772
1560
QEP Class Maximum rpm 949 Maximum rpm
RPM #1 26000
822 12.4 899 17.4
1215
QEP Class Maximum rpm 860
RPM #1 30000 1988 638 718 790 919 980 38.9
33000 2186 684 10.2 761 16.0 829 22.3 892 29.0
903
QEP Class Maximum rpm 780
1007 42000 2296 713 773 829 882 932
63.4 1028 72.6 1072
1035
QEP Class Maximum rpm 704 918
RPM #1 40000 1784 484 10.6 618 730
2007 706 806
2369 33.0 642
QEP Class Maximum rpm 637 830
730 770 808
112 883 127 70000
692
QEP Class Maximum rpm
688 724 790 131 821 879 906 218
3766 727 72.0 762 93.0 796 827
RPM #1 90000 2216 421 28.0 468
QEP Class Maximum rpm 683 860
617 116 136 683
2339 439 31.1 484
QEM Arrangement 4 Horizontal, Direct Drive
Dimensions
QEP Arrangement 1 Horizontal, Motor off Frame
QEP Arrangement 1 Vertical, Motor on Frame, Mounted on Side
QEP Arrangement 3 Horizontal, Motor off Frame
QEP Arrangement 3 Vertical, Motor on Frame, Mounted on Side
Quiet dependable operation
Design and Selection Support
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