Centrifugal Fans
Model LSF
Louvered Roof Supply Fans
August
2008
Page Header
Louvered Roof Supply Fan
Greenheck model LSF louvered roof supply fans
provide filtered make-up air in medium to high
pressure/high volume applications. The louvered
penthouse design provides an aesthetic look and
is designed to allow for maximum air intake without
the entry of rain and snow. For additional filtration of
supply air, the LSF is provided with 2-inch washable
aluminum filters.
Model LSF roof supply fans are available in twelve
wheel sizes, 12–36 in. (305-914 mm) with capacities
from 800 to 37,000 cfm (1,360-62,860 m3/hr) and
static pressures to 5.5 inches (1375 Pa). All fan
sizes are air and sound tested to ensure complete
and accurate performance ratings.
Wheels
LSF supply fans use double width centrifugal wheels. Heavy gauge wheels are
constructed with flat blades (sizes 12–16) and airfoil blades (sizes 18–36) to
provide efficient performance. All wheels are statically and dynamically balanced
to grade G6.3 per ANSI S2.19.
Service Features
Filtered supply fans require regular inspection and cleaning
(or replacement) of filters to ensure maximum efficiency and
cataloged performance. Model LSF louvered penthouses are
designed with hinged covers and quick release latches to permit
easy access.
With covers open, LSF fans offer complete accessibility from
above. Interior dimensions allow clearance for inspection, cleaning
or maintenance of the motor, wheel, belt(s) and drives. Filter racks
are designed to allow filters to slide out vertically for easy removal.
Compatible Products
Where Model LSF fans are selected, a group of compatible products offer uniform appearance on the roof. All
feature the same louvered penthouse styling:
WIH/WRH RSFPLDP/LBP
Gravity Intake & Relief Centrifugal Roof Exhauster
Direct & Belt Drive
2
Filtered Roof Supply Fan
Page Header
Construction Features
The model LSF penthouse hood is constructed of heavy gauge
extruded aluminum louvers. Fan sizes 12 thru 22 are fully factory
assembled with mitered and welded corners. Penthouse hoods on
sizes 24 thru 36 are shipped in sections. See complete details on
page 5.
Hinged cover panels allow quick access to the motor and drive
assembly. Covers are also insulated to prevent condensation.
Hood base panels include prepunched mounting holes for ease of
installation on the roof curb.
The base also elevates the louvers above roof level for protection
from splashing rain or drifting snow.
Motors - Heavy duty motors are carefully matched to the
1
fan load. See page 4 for motor options.
Motor Slide Base - Motor bases are slide-adjustable
2
for ease of maintaining proper belt tension. Bases for
motors with frame sizes 182T and larger include a screw
adjustment.
Shafts - Shafts are precision turned, ground and polished
3
steel sized so that the first critical speed is at least 25%
over the maximum operating speed.
Drives - Drives are sized for a minimum of 150% of
4
driven horsepower and factory set to the desired rpm.
Sheaves are machined cast iron and keyed securely to
fan and motor shafts. Motor pulleys are adjustable for
final system balancing.
Bearings - Highest quality bearings are mounted in cast
5
iron pillow blocks with grease fittings. Bearings are
designed specifically for air handling applications and
are selected for a minimum (L
hours. Precise self alignment reduces vibration for longer
bearing life.
) life in excess of 80,000
10
Filters - Filters are permanent, washable, 2 in. (51 mm)
6
aluminum mesh.
Filter Channels - Formed aluminum filter channels
7
allow filters to be easily removed or installed. Channels
also provide rigid support for the louvered sides of the
penthouse.
Lifting Lugs - Lifting lugs are provided for ease of
8
handling and installation with sizes 15 thru 36.
Fan Housings - Double width/double inlet fan housings
9
are constructed of heavy gauge steel.
Vibration Isolation Base - Structural steel isolation bases
10
with neoprene mounts limit noise transmission into the
building and provide rigid support for fan wheels, motors
and drives.
6
9
8
7
6
9
4
3
5
1
4
2
10
3
Options and Accessories
Options and Accessories
Duct Adapters
Duct adapters are mounted over the roof curb to locate the
top of the duct, limit performance losses by directing airflow
into the duct, and allow ductwork to be completed before the
fan is set in place. Duct adapters are standard with all sizes.
Roof Curbs
Model GPSHL prefabricated roof curbs are available for ease
of fan installation and to reduce installation costs. Curbs are
available in either 8 or 12 in. height (203 or 305 mm). Curbs
for fan sizes 24 thru 36 are shipped in sections for ease of
transportation and handling.
Dampers
Model VCD 1000 motorized intake dampers are designed for
horizontal mounting inside ductwork. Actuators are available
for 24, 115, 230 or 460 volt operation. Nominal damper sizes
and recommended roof curb opening dimensions are shown
in the Dimensional Data section of this catalog. Refer to the
Typical Installation section for damper location.
Motor Options
The chart below lists available motor options. Single phase
115/230 volt motors are available up to 2 hp. Three phase
motors are available up to 40 hp.
Single Speed 2 Speed-2 Winding
Open TE Open
115v
1 ph
* 1 speed, 3 phase motors are available in 200, 230/460 or 575 volt.
** 2 speed, 3 phase motors are available in either 200 or 230 volt up
to 10 hp, 460 volt up to 40 hp; for 575 volt, consult factory.
230v
1 ph
3 ph
115 or
*
230v
1 ph
*
3 ph
115 or
230v
1 ph
**
3 ph
Disconnect Switches
Disconnect switches allow positive electrical shutoff and
safety when servicing the fan. NEMA-1 switches are interior
mounted. NEMA-3R disconnects are exterior mounted on the
fan base.
Birdscreens
Rigid wire, 1/2 in. (13 mm) mesh screens are available in lieu of filters.
4
Handling and Installation
Handling and Installation
Handling and Installation (Sizes 24–36)
Sizes 24 through 36 are shipped in sections for ease of
handling on the jobsite.
Once the fan components are on the roof, final assembly
can be accomplished rapidly. Complete assembly
procedures are found in the LSF Assembly Instructions.
NOTE: LSF sizes 24 and larger can be shipped
completely assembled at additional cost. Consult factory
for details.
The assembled base pan is mounted on the
1
roof curb. The base pan also serves as a duct
adapter.
The motor, drives, blower and isolation base are
2
shipped preassembled on the support frame.
The complete assembly is then mounted over
the base pan.
4
Filters are inserted in channels from above.
The exterior base panels and louver sections
3
with covers are attached to the base support
frame. Louver sections include filter racks.
Center cover is installed, and side covers are
5
closed.
5
Dimensional Data
D
C
B
Y
E F
A*
LIFTING
BRACKETS
2½ inches
(63.5 mm)
ROL/2
ROL
Y/2
Y
A*
3/4 inch
(19 mm)
A/2
A/2
E F
A*
ROW/2
ROW
4.00
X/2
X
CONDUIT
LOCATION
Dimensional Data
Unit
A sq. B C D E F
Size
12 46 51
13 52 57
15 58 64 35
16 58 64 35
18 64 70 40
20 70 76 45
22 70 76 45
24 76 82
27 82 88
30 88 94
33 94 100
36 106 112
7
⁄8 357⁄16 12 19 27 18 14 22 18 16x20 (4), 20x20 (4) 5 445
15
⁄16 357⁄16 12 209⁄16 317⁄16 20 16 24 20 20x20 (8) 5 500
7
⁄16 12 221⁄4 353⁄4 22 16 26 20 20x20 (4), 20x25 (4) 5 689
7
⁄16 12 247⁄16 339⁄16 24 18 28 22 20x20 (4), 20x25 (4) 5 724
15
1
⁄8 501⁄8 143⁄8 3413⁄16 413⁄16 36 26 40 30 16x20 (24) 8 1694
1
⁄8 545⁄8 183⁄8 381⁄16 4315⁄16 40 30 44 34 16x20 (16), 16x25 (8) 8 1931
1
⁄8 x 1061⁄8 565⁄8 193⁄8 42 46 44 32 48 36 16x25 (12), 20x25 (12) 9 2316
1
⁄8 x 1121⁄8 635⁄8 193⁄8 457⁄8 481⁄8 48 36 52 40 20x20 (32) 10 2687
1
⁄8 x 1241⁄8 695⁄8 203⁄8 503⁄8 555⁄8 52 40 56 44 20x20(8), 25x25(8), 20x25(16) 11 3246
⁄16 12 263⁄4 371⁄4 26 20 30 24 25x25 (8) 6 901
15
⁄16 17 29 41 30 22 34 26 20x25 (8), 16x25 (4) 6 1063
15
⁄16 17 317⁄8 381⁄8 32 24 36 28 20x25 (8), 16x25 (4) 6 1148
All dimensions shown are in inches.
*Dimension A given is the inside dimension of the fan curb cap.
The roof curb should be 11⁄2 inches (38 mm) less than the curb cap to allow for roofing and flashing.
For complete dimensional data, refer to the Greenheck CAPS (Computer Aided Product Selection) program.
Duct / Damper
X Y ROW ROL
Min. Roof
Opening
Nominal Filter Sizes
6
(Quantity)
Louver
Tiers
Weight
(lbs.)
Typical Installation
Typical Installation
The following is a typical installation for the Model LSF louvered supply fan showing recommended locations
for accessories, options and items supplied by others. This arrangement offers ease of installation, safety and
accessibility for service.
Disconnect
1
Wiring Knockout
2
Duct Adapter
3
Roof Curb
4
Motorized Damper
5
Structural Support
6
7
Access Door
Ductwork
Electrical
9
Junction Box
10
Electrical disconnects are recommended for safety while servicing the fan. Shown is the NEMA-1 enclosure,
1
interior mounted.
Wiring knockouts are provided in the duct adapter and base pan.
2
The duct adapter fits over the roof curb and is located at the top of the duct to allow ductwork to be
3
completed before the fan is set in place. Ductwork requires additional support.
Greenheck model GPSHL roof curbs are designed to bear and distribute the weight of the LSF. Curbs built
4
by others must have equal capabilities.
Motorized dampers should be located below the roof line for ease of service.
5
It may be necessary to add additional supports beneath the load-carrying sides of the fan and roof curb as
6
shown. See the Dimensional Data section for unit weights.
For ducted applications with motorized dampers, an access door located as shown in the duct allows
7
access to the damper and actuator for service.
Minimum
Roof Opening
8
To reduce turbulence between the fan discharge and the damper, a minimum length of ductwork is
8
recommended from the roof curb to the roof opening. This short length of duct should be used in
non-ducted as well as ducted installations. (Minimum recommended length is three (3) wheel diameters).
The electrical junction box should be mounted in a location that permits ease of wiring the fan motor and
9
damper actuator.
Minimum roof opening dimensions can be found in Dimension Data section. Roof openings may be larger if
10
desired, depending on roof structure.
7
Page Header
Static Pressure (in. wg)
Static Pressure (Pa x 100)
Volume (cfm x 1000)
3
Volume (m /hr x 1000)
0 2 4 6 8 10
0
2
4
6
8
10
12
14
16
0 1 2 3 4 5 6
0
1
2
3
4
5
6
7
LSF-12
1374
1573
1800
1982
2497
2268
2858
3205
¾
½
1½
2
3
5
1
/3
1
Constant rpm
Constant hp
Density 0.075 lb/ft
3
Density 1.2 kg/m
3
D
O
N
O
T
S
E
L
E
C
T
T
O
T
H
E
L
E
F
T
O
F
T
HI
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S
Y
S
T
E
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LSF-12
Maximum rpm 3205
Maximum Motor Frame Size 184T
Minimum Motor Size 1/3 [hp]
Maximum Motor Size 5 [hp]
12.25
Wheel Diameter
Outlet Area
Outlet Velocity
Peak Power
Tip Speed
Imperial data — Metric data
cfm / 1.55
3
m
/s / 0.91
(rpm / 1981)
(rpm / 2185)
rpm x 3.21
rpm x 0.0163
311
1.55
0.144
[in.]
[mm]
[ft
[m2]
[ft/min]
[m/s]
3
[ft/min]
3
[m/s]
[ft/min]
[m/s]
2
]
STATIC PRESSURE (in. wg)
CFM OV
0.00 0.25 0.50 0.75 1.00 1.25 1.50 1.75 2.00
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
1000 645 521 0.02 811 0.07 1013 0.13 1191 0.21 1347 0.29
1300 838 678 0.04 927 0.10 1110 0.17 1265 0.26 1402 0.34 1539 0.44 1664 0.55 1778 0.66
1600 1032 834 0.07 1049 0.14 1218 0.23 1362 0.32 1492 0.42 1608 0.53 1719 0.64 1833 0.76 1939 0.88
1900 1225 990 0.11 1180 0.20 1335 0.30 1468 0.41 1590 0.51 1704 0.63 1808 0.75 1905 0.87 1996 1.00
2200 1419 1147 0.17 1317 0.28 1456 0.39 1585 0.51 1698 0.63 1803 0.75 1905 0.88 2001 1.02 2090 1.16
2500 1612 1303 0.26 1457 0.38 1586 0.50 1704 0.62 1814 0.76 1914 0.90 2006 1.04 2099 1.18 2187 1.33
2800 1806 1460 0.36 1600 0.49 1720 0.63 1829 0.77 1933 0.91 2030 1.07 2120 1.22 2204 1.37 2287 1.53
3100 2000 1616 0.49 1746 0.64 1857 0.79 1959 0.94 2054 1.09 2149 1.26 2237 1.43 2319 1.59 2397 1.76
3400 2193 1772 0.64 1893 0.81 1996 0.97 2093 1.13 2184 1.30 2270 1.47 2355 1.65 2436 1.84 2512 2.02
3700 2387 1929 0.83 2042 1.01 2139 1.19 2230 1.36 2315 1.54 2397 1.72 2477 1.91 2555 2.11 2630 2.31
4000 2580 2085 1.05 2192 1.24 2283 1.43 2368 1.63 2450 1.82 2528 2.01 2603 2.21 2676 2.41 2749 2.63
4300 2774 2242 1.30 2342 1.51 2428 1.72 2509 1.92 2587 2.13 2662 2.34 2734 2.55 2803 2.76 2871 2.98
4600 2967 2398 1.59 2492 1.82 2575 2.04 2652 2.26 2726 2.48 2798 2.70 2866 2.92 2933 3.15 2998 3.38
4900 3161 2554 1.93 2643 2.17 2723 2.40 2796 2.64 2866 2.87 2935 3.11 3001 3.34 3065 3.58 3128 3.82
5200 3354 2711 2.30 2795 2.56 2871 2.81 2942 3.06 3009 3.31 3074 3.56 3138 3.80 3200 4.06
5500 3548 2867 2.72 2947 2.99 3021 3.26 3088 3.52 3153 3.79
STATIC PRESSURE (in. wg)
CFM OV
1.50 2.00 2.50 3.00 3.50 4.00 4.500 5.00 5.50
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
2000 1290 1840 0.79 2027 1.05 2207 1.33 2382 1.64 2544 1.96 2695 2.29
2150 1387 1889 0.86 2074 1.13 2240 1.42 2410 1.73 2571 2.06 2722 2.40 2863 2.76 2997 3.13
2300 1483 1938 0.93 2122 1.21 2287 1.51 2438 1.82 2599 2.16 2749 2.52 2890 2.89 3024 3.26 3152 3.65
2450 1580 1989 1.01 2171 1.30 2334 1.61 2483 1.93 2627 2.27 2777 2.64 2918 3.01 3051 3.40 3179 3.80
2600 1677 2044 1.09 2220 1.40 2382 1.72 2530 2.05 2668 2.39 2804 2.76 2945 3.15 3079 3.55
2750 1774 2101 1.19 2270 1.50 2431 1.83 2578 2.17 2715 2.53 2843 2.89 2973 3.28 3106 3.69
2900 1870 2159 1.28 2321 1.60 2480 1.95 2626 2.30 2762 2.67 2890 3.05 3010 3.44 3134 3.85
3050 1967 2217 1.39 2378 1.72 2530 2.07 2675 2.44 2810 2.82 2937 3.21 3057 3.61 3171 4.01
3200 2064 2276 1.50 2435 1.85 2580 2.20 2724 2.58 2859 2.97 2985 3.37 3104 3.78
3350 2161 2335 1.61 2493 1.98 2636 2.35 2774 2.73 2908 3.13 3033 3.55 3152 3.97
3500 2258 2396 1.74 2552 2.12 2693 2.50 2825 2.89 2957 3.30 3082 3.73 3200 4.16
3650 2354 2456 1.87 2610 2.26 2750 2.66 2880 3.06 3007 3.48 3131 3.92
3800 2451 2518 2.01 2670 2.41 2809 2.83 2937 3.24 3058 3.67 3181 4.11
3950 2548 2582 2.16 2729 2.57 2867 3.00 2994 3.43 3114 3.87
4100 2645 2647 2.32 2790 2.74 2926 3.19 3052 3.63 3171 4.08
4250 2741 2712 2.49 2851 2.92 2985 3.37 3111 3.84
Performance shown is for model LSF with outlet duct. Power ratings (Bhp) do not include transmission losses.
8
Page Header
Static Pressure (in. wg)
Static Pressure (Pa x 100)
Volume (cfm x 1000)
3
Volume (m /hr x 1000)
0 2 4 6 8 10
0
2
4
6
8
10
12
14
16
0 1 2 3 4 5 6 7
0
1
2
3
4
5
6
7
LSF-13
Constant rpm
Constant hp
Density 0.075 lb/ft
3
Density 1.2 kg/m
3
1306
1495
1645
1884
2073
2600
2373
2814
2908
¾
½
1½
2
3
5
7½
1
D
O
N
O
T
S
E
L
E
C
T
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O
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LSF-13
Maximum rpm 2908
Maximum Motor Frame Size 184T
Minimum Motor Size 1/2 [hp]
Maximum Motor Size 5 [hp]
13.50
Wheel Diameter
Outlet Area
Outlet Velocity
Peak Power
Tip Speed
Imperial data — Metric data
cfm / 1.89
3
m
/s / 1.11
(rpm / 1647)
(rpm / 1816)
rpm x 3.53
rpm x 0.0180
343
1.89
0.176
[in.]
[mm]
[ft
[m2]
[ft/min]
[m/s]
3
[ft/min]
3
[m/s]
[ft/min]
[m/s]
2
]
STATIC PRESSURE (in. wg)
CFM OV
0.00 0.25 0.50 0.75 1.00 1.25 1.50 1.75 2.00
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
1000 529 400 0.01 676 0.07 878 0.14 1039 0.23
1400 740 561 0.04 785 0.11 953 0.19 1104 0.29 1239 0.40 1358 0.51 1466 0.63
1800 952 721 0.07 910 0.16 1058 0.26 1189 0.38 1306 0.49 1424 0.62 1531 0.76 1630 0.90 1723 1.05
2200 1164 881 0.14 1045 0.24 1176 0.36 1294 0.48 1404 0.62 1505 0.76 1599 0.91 1697 1.06 1788 1.23
2600 1375 1041 0.22 1184 0.35 1305 0.48 1412 0.63 1512 0.77 1606 0.93 1696 1.09 1780 1.26 1859 1.43
3000 1587 1201 0.35 1329 0.49 1439 0.64 1538 0.80 1630 0.96 1717 1.13 1799 1.30 1880 1.49 1958 1.67
3400 1798 1361 0.50 1477 0.67 1577 0.84 1670 1.01 1755 1.19 1836 1.37 1915 1.56 1988 1.76 2060 1.96
3800 2010 1522 0.70 1627 0.89 1719 1.07 1806 1.26 1887 1.46 1962 1.66 2034 1.87 2106 2.08 2174 2.29
4200 2222 1682 0.95 1778 1.16 1864 1.36 1944 1.56 2021 1.78 2093 2.00 2161 2.22 2226 2.44 2292 2.67
4600 2433 1842 1.25 1931 1.48 2011 1.69 2086 1.92 2158 2.15 2227 2.38 2293 2.62 2355 2.87 2415 3.11
5000 2645 2002 1.60 2085 1.85 2160 2.09 2230 2.33 2298 2.58 2364 2.83 2427 3.09 2487 3.35 2544 3.61
5400 2857 2162 2.01 2240 2.29 2310 2.55 2377 2.81 2440 3.07 2503 3.34 2563 3.61 2621 3.89 2677 4.17
5800 3068 2322 2.50 2396 2.80 2462 3.07 2525 3.35 2585 3.63 2643 3.91 2701 4.20 2757 4.50 2811 4.79
6200 3280 2483 3.05 2552 3.37 2614 3.67 2674 3.96 2731 4.26 2787 4.56 2841 4.86 2895 5.18
6600 3492 2643 3.68 2708 4.03 2768 4.34 2824 4.65 2879 4.97
7000 3703 2803 4.39 2865 4.76
STATIC PRESSURE (in. wg)
CFM OV
1.50 2.00 2.50 3.00 3.50 4.00 4.500 5.00 5.50
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
2500 1322 1671 1.04 1839 1.37 2006 1.74 2158 2.12 2298 2.52 2429 2.93 2552 3.35
2700 1428 1721 1.14 1883 1.49 2040 1.86 2191 2.26 2331 2.67 2461 3.10 2584 3.54 2700 3.99 2811 4.46
2900 1534 1772 1.25 1933 1.61 2076 1.99 2225 2.40 2364 2.83 2494 3.27 2617 3.73 2733 4.20 2843 4.68
3100 1640 1827 1.36 1983 1.74 2125 2.14 2259 2.55 2398 3.00 2527 3.46 2649 3.93 2765 4.42 2876 4.92
3300 1746 1885 1.49 2034 1.88 2175 2.30 2305 2.72 2432 3.17 2561 3.65 2683 4.14 2798 4.64
3500 1851 1944 1.63 2087 2.03 2226 2.46 2354 2.91 2474 3.37 2595 3.85 2716 4.35 2831 4.87
3700 1957 2004 1.79 2145 2.20 2277 2.64 2404 3.10 2523 3.58 2634 4.06 2750 4.58 2865 5.11
3900 2063 2064 1.95 2203 2.38 2330 2.83 2455 3.31 2573 3.80 2684 4.30 2788 4.82 2899 5.36
4100 2169 2129 2.12 2262 2.57 2387 3.04 2507 3.53 2623 4.03 2733 4.55 2837 5.08
4300 2275 2194 2.31 2322 2.78 2445 3.26 2560 3.75 2674 4.28 2783 4.81 2887 5.36
4500 2380 2259 2.52 2383 3.00 2504 3.49 2618 4.01 2726 4.54 2834 5.09
4700 2486 2326 2.73 2447 3.23 2564 3.74 2676 4.27 2781 4.81 2886 5.38
4900 2592 2393 2.96 2512 3.48 2624 4.01 2735 4.55 2839 5.11
5100 2698 2460 3.21 2577 3.74 2686 4.29 2794 4.85 2897 5.42
5300 2804 2529 3.47 2643 4.02 2750 4.58 2854 5.16
5500 2910 2597 3.75 2710 4.32 2815 4.90
Performance shown is for model LSF with outlet duct. Power ratings (Bhp) do not include transmission losses.
9
Page Header
Static Pressure (in. wg)
Static Pressure (Pa x 100)
Volume (cfm x 1000)
3
Volume (m /hr x 1000)
0 2 4 6 8 10 12 14 16
0
2
4
6
8
10
12
14
16
0 2 4 6 8 10
0
1
2
3
4
5
6
7
LSF-15
1098
1257
1383
1584
1743
1995
2200
2366
2617
¾
½
1½
2
3
5
7½
1
Constant rpm
Constant hp
Density 0.075 lb/ft
3
Density 1.2 kg/m
3
D
O
N
O
T
S
E
L
E
C
T
T
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TH
E
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LSF-15
Maximum rpm 2617
Maximum Motor Frame Size 213T
Minimum Motor Size 1/2 [hp]
1
15.00
2.33
0.216
3
/s / 1.37
381
⁄2 [hp]
[in.]
[mm]
[ft
[m2]
[ft/min]
[m/s]
3
[ft/min]
3
[m/s]
[ft/min]
[m/s]
2
]
Maximum Motor Size 7
Wheel Diameter
Outlet Area
Outlet Velocity
Peak Power
Tip Speed
Imperial data — Metric data
cfm / 2.33
m
(rpm / 1385)
(rpm / 1527)
rpm x 3.93
rpm x 0.0199
STATIC PRESSURE (in. wg)
CFM OV
0.00 0.25 0.50 0.75 1.00 1.25 1.50 1.75 2.00
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
1500 643 402 0.02 632 0.10 790 0.18 933 0.29
2000 858 537 0.05 731 0.15 871 0.25 992 0.36 1103 0.49 1210 0.63
2500 1072 671 0.10 839 0.22 966 0.34 1077 0.47 1176 0.61 1269 0.76 1355 0.91 1445 1.08 1528 1.26
3000 1287 805 0.18 956 0.32 1070 0.46 1171 0.61 1264 0.76 1349 0.92 1431 1.09 1508 1.27 1580 1.46
3500 1502 939 0.28 1076 0.45 1179 0.61 1273 0.77 1359 0.95 1442 1.13 1516 1.31 1587 1.50 1658 1.70
4000 1716 1073 0.42 1199 0.61 1294 0.80 1380 0.98 1461 1.17 1537 1.37 1610 1.57 1678 1.78 1744 1.99
4500 1931 1207 0.59 1322 0.81 1413 1.02 1492 1.23 1568 1.44 1640 1.65 1706 1.87 1773 2.10 1837 2.33
5000 2145 1341 0.81 1446 1.06 1534 1.30 1609 1.52 1678 1.76 1746 1.99 1811 2.23 1872 2.47 1932 2.72
5500 2360 1476 1.08 1572 1.35 1657 1.62 1727 1.87 1794 2.12 1856 2.38 1918 2.64 1977 2.90 2034 3.16
6000 2575 1610 1.40 1699 1.70 1779 2.00 1848 2.28 1911 2.55 1971 2.82 2028 3.10 2085 3.38 2139 3.67
6500 2789 1744 1.78 1826 2.10 1903 2.43 1971 2.74 2030 3.03 2087 3.33 2142 3.63 2194 3.93 2247 4.23
7000 3004 1878 2.23 1955 2.57 2027 2.92 2094 3.27 2152 3.59 2206 3.90 2258 4.22 2309 4.54 2357 4.87
7500 3218 2012 2.74 2084 3.11 2152 3.48 2216 3.86 2274 4.21 2326 4.55 2377 4.89 2425 5.23 2472 5.58
8000 3433 2146 3.32 2214 3.72 2279 4.11 2340 4.51 2398 4.92 2448 5.27 2496 5.63 2543 6.00 2588 6.36
8500 3648 2280 3.98 2345 4.40 2406 4.82 2464 5.25 2520 5.68 2571 6.08
9000 3862 2414 4.73 2475 5.17 2534 5.62 2589 6.07
STATIC PRESSURE (in. wg)
CFM OV
1.50 2.00 2.50 3.00 3.50 4.00 4.50 5.00 5.50
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
3250 1394 1471 1.20 1619 1.58 1751 1.97 1889 2.42 2016 2.88
3500 1502 1516 1.31 1658 1.70 1789 2.12 1913 2.56 2040 3.04 2158 3.54
3750 1609 1562 1.44 1698 1.84 1828 2.27 1947 2.73 2064 3.20 2181 3.72 2292 4.25 2398 4.80
4000 1716 1610 1.57 1744 1.99 1868 2.44 1986 2.91 2096 3.39 2205 3.91 2316 4.46 2421 5.02 2521 5.60
4250 1824 1658 1.72 1790 2.16 1909 2.62 2025 3.10 2134 3.60 2236 4.12 2340 4.67 2444 5.25 2544 5.85
4500 1931 1706 1.87 1837 2.33 1955 2.81 2065 3.30 2173 3.82 2275 4.36 2371 4.91 2468 5.49 2568 6.10
4750 2038 1758 2.04 1884 2.52 2001 3.01 2109 3.52 2213 4.06 2314 4.61 2409 5.18 2500 5.76 2592 6.37
5000 2145 1811 2.23 1932 2.72 2048 3.23 2154 3.76 2254 4.30 2353 4.87 2448 5.46 2539 6.06
5250 2253 1864 2.42 1981 2.93 2095 3.46 2200 4.01 2299 4.57 2393 5.14 2488 5.75 2578 6.37
5500 2360 1918 2.64 2034 3.16 2143 3.71 2248 4.27 2345 4.85 2438 5.44 2527 6.05
5750 2467 1973 2.86 2086 3.41 2191 3.97 2295 4.55 2392 5.15 2483 5.76 2571 6.38
6000 2575 2028 3.10 2139 3.67 2242 4.25 2343 4.84 2439 5.46 2529 6.09 2616 6.73
6250 2682 2084 3.36 2193 3.94 2295 4.54 2391 5.15 2486 5.79 2577 6.44
6500 2789 2142 3.63 2247 4.23 2347 4.85 2441 5.48 2534 6.13
6750 2896 2200 3.92 2302 4.54 2401 5.18 2493 5.83 2582 6.49
7000 3004 2258 4.22 2357 4.87 2455 5.53 2546 6.19
Performance shown is for model LSF with outlet duct. Power ratings (Bhp) do not include transmission losses.
10
Page Header
Static Pressure (in. wg)
Static Pressure (Pa x 100)
Volume (cfm x 1000)
3
Volume (m /hr x 1000)
0 2 4 6 8 10 12 14 16 18 20
0
2
4
6
8
10
12
14
16
0 2 4 6 8 10 12
0
1
2
3
4
5
6
7
LSF-16
Constant rpm
Constant hp
Density 0.075 lb/ft
3
Density 1.2 kg/m
3
926
1060
1167
1336
1470
1850
1683
1995
2150
2284
2379
¾
½
1½
2
3
5
7½
10
1
D
O
N
O
T
S
E
L
E
C
T
T
O
T
H
E
L
E
F
T
O
F
T
H
I
S
S
Y
S
T
E
M
C
U
R
V
E
LSF-16
Maximum rpm 2379
Maximum Motor Frame Size 213T
Minimum Motor Size 1/2 [hp]
1
16.50
2.82
0.262
3
/s / 1.66
419
⁄2 [hp]
[in.]
[mm]
[ft
[m2]
[ft/min]
[m/s]
3
[ft/min]
3
[m/s]
[ft/min]
[m/s]
2
]
Maximum Motor Size 7
Wheel Diameter
Outlet Area
Outlet Velocity
Peak Power
Tip Speed
Imperial data — Metric data
cfm / 2.82
m
(rpm / 1168)
(rpm / 1288)
rpm x 4.32
rpm x 0.0219
STATIC PRESSURE (in. wg)
CFM OV
0.00 0.25 0.50 0.75 1.00 1.25 1.50 1.75 2.00
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
2000 709 410 0.04 594 0.13 731 0.23
2600 921 532 0.09 688 0.20 809 0.33 912 0.46
3200 1134 655 0.16 784 0.30 897 0.45 992 0.61 1078 0.77 1161 0.93
3800 1347 778 0.27 889 0.43 992 0.61 1080 0.79 1161 0.97 1236 1.16 1305 1.35 1375 1.55 1441 1.76
4400 1560 901 0.43 998 0.61 1087 0.80 1175 1.02 1249 1.22 1319 1.44 1386 1.65 1448 1.87 1508 2.09
5000 1773 1024 0.63 1112 0.83 1191 1.04 1270 1.27 1343 1.52 1409 1.76 1470 2.00 1531 2.24 1590 2.48
5600 1985 1147 0.88 1227 1.11 1297 1.34 1368 1.58 1438 1.86 1504 2.13 1563 2.39 1619 2.66 1673 2.93
6200 2198 1270 1.19 1344 1.45 1407 1.70 1472 1.96 1534 2.24 1599 2.55 1658 2.85 1712 3.15 1763 3.44
6800 2411 1393 1.57 1462 1.86 1521 2.13 1578 2.41 1637 2.71 1694 3.02 1753 3.36 1807 3.70 1857 4.02
7400 2624 1515 2.03 1580 2.34 1635 2.64 1687 2.93 1742 3.25 1795 3.57 1848 3.92 1902 4.29 1953 4.67
8000 2836 1638 2.56 1698 2.90 1751 3.23 1800 3.54 1848 3.87 1899 4.22 1948 4.57 1997 4.95 2047 5.35
8600 3049 1761 3.19 1817 3.55 1868 3.90 1914 4.24 1958 4.58 2005 4.95 2052 5.33 2097 5.71 2143 6.11
9200 3262 1884 3.90 1937 4.29 1986 4.67 2029 5.04 2071 5.40 2112 5.77 2157 6.17 2201 6.57 2243 6.98
9800 3475 2007 4.71 2056 5.13 2103 5.54 2145 5.93 2185 6.32 2224 6.71 2264 7.11 2306 7.54 2347 7.97
10400 3687 2130 5.63 2176 6.07 2221 6.51 2262 6.93 2300 7.34 2337 7.75 2373 8.17
11000 3900 2253 6.67 2297 7.13 2339 7.59
STATIC PRESSURE (in. wg)
CFM OV
1.50 2.00 2.50 3.00 3.50 4.00 4.50 5.00 5.50
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
5000 1773 1470 2.00 1590 2.48 1696 2.98 1803 3.51 1904 4.04
5250 1861 1509 2.16 1624 2.66 1730 3.18 1831 3.72 1931 4.27
5500 1950 1547 2.32 1659 2.85 1765 3.39 1861 3.94 1959 4.52 2052 5.10
5750 2039 1586 2.50 1694 3.06 1799 3.61 1895 4.18 1987 4.77 2080 5.37 2167 5.99
6000 2127 1626 2.69 1732 3.27 1834 3.85 1930 4.43 2019 5.03 2108 5.65 2195 6.29 2278 6.93
6250 2216 1666 2.90 1771 3.49 1869 4.09 1964 4.70 2052 5.31 2136 5.94 2223 6.60 2306 7.26
6500 2304 1706 3.11 1810 3.72 1905 4.34 1999 4.97 2087 5.61 2170 6.26 2251 6.92 2333 7.61
6750 2393 1745 3.32 1849 3.96 1943 4.61 2034 5.26 2121 5.92 2204 6.58 2282 7.26 2362 7.96
7000 2482 1784 3.54 1889 4.22 1982 4.89 2069 5.56 2156 6.24 2238 6.92 2315 7.62
7250 2570 1824 3.77 1929 4.50 2021 5.18 2107 5.87 2191 6.57 2273 7.28 2350 7.99
7500 2659 1864 4.02 1969 4.78 2060 5.48 2145 6.20 2226 6.92 2307 7.65
7750 2748 1905 4.28 2008 5.06 2099 5.80 2184 6.54 2263 7.28 2342 8.03
8000 2836 1948 4.57 2047 5.35 2139 6.14 2223 6.89 2301 7.65 2377 8.43
8250 2925 1991 4.88 2087 5.66 2179 6.49 2262 7.26 2340 8.04
8500 3014 2035 5.19 2127 5.98 2219 6.84 2301 7.64 2379 8.45
Performance shown is for model LSF with outlet duct. Power ratings (Bhp) do not include transmission losses.
8750 3102 2078 5.53 2167 6.31 2258 7.19 2341 8.04
11
Page Header
Static Pressure (in. wg)
Static Pressure (Pa x 100)
Volume (cfm x 1000)
3
Volume (m /hr x 1000)
0 5 10 15 20
0
2
4
6
8
10
12
14
16
0 2 4 6 8 10 12 14
0
1
2
3
4
5
6
7
LSF-18
1099
1258
1385
1585
1879
2151
2353
1½
2
3
5
7½
10
1
Constant rpm
Constant hp
Density 0.075 lb/ft
3
Density 1.2 kg/m
3
D
O
N
O
T
S
E
L
E
C
T
T
O
T
H
E
L
E
F
T
O
F
T
H
I
S
S
Y
S
T
E
M
C
U
R
V
E
LSF-18
Maximum rpm 2389
Maximum Motor Frame Size 215T
Minimum Motor Size 3/4 [hp]
Maximum Motor Size 10 [hp]
18.25
Wheel Diameter
Outlet Area
Outlet Velocity
Peak Power
Tip Speed
Imperial data — Metric data
cfm / 3.45
3
m
/s / 2.03
(rpm / 1140)
(rpm / 1257)
rpm x 4.78
rpm x 0.0243
464
3.45
0.321
[in.]
[mm]
[ft
[m2]
[ft/min]
[m/s]
3
[ft/min]
3
[m/s]
[ft/min]
[m/s]
2
]
STATIC PRESSURE (in. wg)
CFM OV
0.00 0.25 0.50 0.75 1.00 1.25 1.50 1.75 2.00
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
3000 869 545 0.11 681 0.23 792 0.37 891 0.52 988 0.69 1079 0.87 1169 1.07
3600 1043 654 0.18 770 0.33 872 0.49 960 0.66 1042 0.83 1127 1.04 1204 1.24 1278 1.46 1356 1.69
4200 1217 762 0.29 865 0.46 957 0.64 1039 0.84 1114 1.03 1185 1.23 1257 1.45 1328 1.69 1394 1.93
4800 1391 871 0.43 963 0.62 1046 0.83 1123 1.05 1193 1.27 1258 1.49 1322 1.72 1382 1.95 1447 2.21
5400 1565 980 0.61 1063 0.83 1137 1.05 1210 1.29 1277 1.54 1338 1.79 1396 2.04 1454 2.3 1510 2.55
6000 1739 1089 0.84 1164 1.08 1233 1.32 1299 1.58 1363 1.85 1422 2.13 1477 2.41 1530 2.69 1583 2.97
6600 1913 1198 1.12 1267 1.38 1331 1.65 1390 1.92 1451 2.21 1508 2.51 1562 2.82 1612 3.12 1661 3.43
7200 2086 1307 1.45 1371 1.74 1430 2.03 1486 2.32 1540 2.63 1595 2.95 1647 3.28 1697 3.62 1744 3.94
7800 2260 1416 1.85 1475 2.15 1530 2.46 1584 2.78 1634 3.11 1685 3.45 1735 3.8 1783 4.16 1829 4.52
8400 2434 1525 2.31 1580 2.64 1632 2.97 1682 3.31 1730 3.66 1776 4.01 1824 4.38 1870 4.76 1915 5.14
9000 2608 1634 2.84 1686 3.19 1734 3.55 1782 3.91 1827 4.28 1871 4.65 1914 5.03 1959 5.43 2002 5.84
9600 2782 1743 3.45 1792 3.82 1838 4.2 1882 4.58 1926 4.97 1968 5.37 2008 5.77 2049 6.18 2091 6.61
10200 2956 1852 4.14 1898 4.53 1942 4.93 1984 5.34 2025 5.75 2066 6.17 2105 6.59 2142 7.02 2181 7.46
10800 3130 1961 4.91 2004 5.33 2046 5.75 2086 6.18 2125 6.62 2164 7.05 2202 7.5 2238 7.95 2274 8.4
11400 3304 2070 5.77 2111 6.22 2151 6.66 2189 7.12 2226 7.57 2264 8.03 2300 8.5 2335 8.97
12000 3478 2179 6.73 2218 7.2 2256 7.67 2293 8.14 2328 8.62
STATIC PRESSURE (in. wg)
CFM OV
1.50 2.00 2.50 3.00 3.50 4.00 4.50 5.00 5.50
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
4000 1159 1239 1.38 1377 1.85 1515 2.35 1643 2.89
4400 1275 1275 1.53 1412 2.02 1533 2.54 1660 3.11 1778 3.69
4800 1391 1322 1.72 1447 2.21 1568 2.76 1678 3.33 1795 3.94 1905 4.58
5200 1507 1371 1.93 1486 2.43 1603 2.99 1713 3.59 1814 4.21 1922 4.87 2025 5.55 2123 6.25
5600 1623 1422 2.16 1534 2.69 1639 3.24 1748 3.87 1848 4.51 1942 5.18 2042 5.88 2140 6.61 2233 7.35
6000 1739 1477 2.41 1583 2.97 1683 3.54 1784 4.16 1884 4.83 1977 5.52 2066 6.23 2157 6.98 2250 7.75
6400 1855 1533 2.68 1633 3.27 1731 3.87 1824 4.49 1920 5.17 2013 5.89 2100 6.63 2184 7.38 2267 8.16
6800 1971 1590 2.97 1688 3.6 1781 4.23 1871 4.88 1957 5.53 2048 6.27 2136 7.04 2219 7.82 2298 8.62
7200 2086 1647 3.28 1744 3.94 1832 4.62 1921 5.29 2004 5.98 2085 6.68 2172 7.47 2254 8.28 2333 9.11
7600 2202 1705 3.62 1800 4.32 1887 5.02 1970 5.74 2052 6.45 2131 7.17 2208 7.93 2290 8.77
Performance shown is for model LSF with outlet duct. Power ratings (Bhp) do not include transmission losses.
8000 2318 1764 3.98 1857 4.72 1943 5.46 2022 6.2 2102 6.95 2179 7.71 2253 8.47 2326 9.27
8400 2434 1824 4.38 1915 5.14 1999 5.92 2077 6.7 2152 7.49 2228 8.27 2301 9.07
8800 2550 1884 4.81 1973 5.6 2056 6.41 2133 7.22 2206 8.04 2277 8.87 2350 9.69
9200 2666 1945 5.27 2032 6.09 2113 6.93 2189 7.78 2262 8.63 2330 9.49
9600 2782 2008 5.77 2091 6.61 2171 7.48 2246 8.37 2317 9.25
10000 2898 2072 6.31 2151 7.16 2229 8.07 2303 8.98
12
Page Header
Static Pressure (in. wg)
Static Pressure (Pa x 100)
Volume (cfm x 1000)
3
Volume (m /hr x 1000)
0 5 10 15 20 25
0
2
4
6
8
10
12
14
16
0 2 4 6 8 10 12 14 16
0
1
2
3
4
5
6
7
LSF-20
Constant rpm
Constant hp
Density 0.075 lb/ft
3
Density 1.2 kg/m
3
943
1079
1188
1360
1613
1846
2032
2147
1½
2
3
5
7½
10
1
15
D
O
N
O
T
S
E
L
E
C
T
T
O
T
H
E
L
E
F
T
O
F
T
H
I
S
S
Y
S
T
E
M
C
U
R
V
E
LSF-20
Maximum rpm 2179
Maximum Motor Frame Size 254T
Minimum Motor Size 3/4 [hp]
Maximum Motor Size 15 [hp]
20.00
Wheel Diameter
Outlet Area
Outlet Velocity
Peak Power
Tip Speed
Imperial data — Metric data
cfm / 4.14
3
m
/s / 2.44
(rpm / 972)
(rpm / 1072)
rpm x 5.24
rpm x 0.0266
508
4.14
0.385
[in.]
[mm]
[ft
[m2]
[ft/min]
[m/s]
3
[ft/min]
3
[m/s]
[ft/min]
[m/s]
2
]
STATIC PRESSURE (in. wg)
CFM OV
0.00 0.25 0.50 0.75 1.00 1.25 1.50 1.75 2.00
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
3000 724 414 0.07 557 0.2 668 0.35 773 0.52 873 0.71
3800 917 524 0.15 644 0.31 741 0.48 828 0.66 915 0.87 993 1.1 1073 1.34 1149 1.59
4600 1111 635 0.26 735 0.45 825 0.66 902 0.87 975 1.09 1047 1.33 1117 1.59 1182 1.86 1246 2.14
5400 1304 745 0.43 833 0.64 913 0.88 986 1.12 1050 1.38 1114 1.63 1173 1.89 1236 2.18 1296 2.48
6200 1497 855 0.64 934 0.89 1004 1.15 1072 1.43 1134 1.71 1191 2 1247 2.29 1301 2.59 1352 2.89
7000 1690 966 0.93 1036 1.2 1100 1.49 1162 1.79 1221 2.11 1276 2.44 1327 2.76 1376 3.09 1426 3.42
7800 1884 1076 1.28 1140 1.59 1199 1.9 1253 2.23 1310 2.58 1362 2.93 1411 3.3 1458 3.65 1502 4.02
8600 2077 1186 1.72 1245 2.06 1299 2.4 1350 2.75 1400 3.12 1451 3.51 1498 3.9 1543 4.3 1586 4.7
9400 2270 1297 2.24 1351 2.61 1401 2.99 1449 3.37 1495 3.76 1541 4.17 1587 4.59 1630 5.02 1672 5.46
10200 2463 1407 2.86 1457 3.27 1504 3.67 1549 4.08 1592 4.5 1634 4.92 1677 5.37 1719 5.83 1760 6.3
11000 2657 1518 3.59 1564 4.02 1608 4.46 1650 4.9 1691 5.35 1731 5.8 1769 6.26 1809 6.75 1848 7.25
11800 2850 1628 4.44 1671 4.9 1713 5.37 1752 5.84 1791 6.32 1829 6.8 1866 7.28 1901 7.78 1939 8.3
12600 3043 1738 5.4 1779 5.89 1818 6.39 1856 6.9 1892 7.4 1929 7.91 1964 8.43 1997 8.95 2031 9.48
13400 3236 1849 6.49 1887 7.02 1924 7.55 1960 8.08 1994 8.62 2029 9.16 2062 9.71 2095 10.26 2127 10.81
14200 3429 1959 7.73 1995 8.28 2031 8.84 2064 9.41 2097 9.98 2130 10.55
15000 3623 2069 9.11 2104 9.7 2137 10.29
STATIC PRESSURE (in. wg)
CFM OV
1.50 2.00 2.50 3.00 3.50 4.00 4.50 5.00 5.50
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
5000 1207 1144 1.73 1269 2.3 1389 2.92 1506 3.57
5500 1328 1182 1.94 1303 2.53 1413 3.17 1522 3.85 1630 4.57 1730 5.31
6000 1449 1228 2.19 1337 2.78 1447 3.45 1546 4.15 1646 4.89 1746 5.67 1840 6.47
6500 1570 1275 2.46 1379 3.08 1480 3.75 1580 4.48 1672 5.24 1762 6.04 1856 6.87 1945 7.73 2030 8.61
7000 1690 1327 2.76 1426 3.42 1518 4.09 1614 4.84 1705 5.63 1791 6.45 1873 7.29 1962 8.19 2046 9.1
7500 1811 1379 3.09 1472 3.79 1563 4.49 1648 5.22 1739 6.05 1824 6.9 1904 7.77 1980 8.67 2063 9.61
8000 1932 1433 3.44 1523 4.18 1610 4.93 1692 5.69 1773 6.48 1858 7.37 1938 8.28 2014 9.21 2086 10.15
8500 2053 1487 3.82 1576 4.61 1657 5.4 1738 6.2 1815 7.01 1892 7.87 1972 8.81 2047 9.77 2119 10.76
9000 2173 1542 4.23 1629 5.07 1709 5.9 1786 6.74 1861 7.59 1933 8.45 2006 9.37 2081 10.37
9500 2294 1598 4.68 1683 5.56 1761 6.43 1834 7.32 1908 8.21 1978 9.11 2046 10.02 2115 10.99
10000 2415 1654 5.17 1738 6.08 1815 7.01 1887 7.93 1955 8.87 2025 9.81 2091 10.75
10500 2536 1711 5.69 1793 6.64 1869 7.62 1939 8.58 2006 9.56 2072 10.55 2138 11.53
11000 2657 1769 6.26 1848 7.25 1923 8.26 1993 9.28 2059 10.29 2121 11.32
11500 2777 1829 6.89 1905 7.89 1978 8.94 2047 10.01 2112 11.07
12000 2898 1890 7.56 1962 8.59 2033 9.67 2101 10.77
12500 3019 1951 8.28 2019 9.33 2089 10.45
Performance shown is for model LSF with outlet duct. Power ratings (Bhp) do not include transmission losses.
13
Page Header
Static Pressure (in. wg)
Static Pressure (Pa x 100)
Volume (cfm x 1000)
3
Volume (m /hr x 1000)
0 5 10 15 20 25 30
0
2
4
6
8
10
12
14
16
0 5 10 15 20
0
1
2
3
4
5
6
7
LSF-22
Constant rpm
Constant hp
Density 0.075 lb/ft
3
Density 1.2 kg/m
3
790
904
995
1139
1351
1546
1702
1850
1½
2
3
5
7½
10
1
15
20
1948
1975
D
O
N
O
T
S
E
L
E
C
T
T
O
T
HE
L
E
F
T
O
F
T
H
I
S
S
Y
S
T
E
M
C
U
R
V
E
LSF-22
Maximum rpm 1959
Maximum Motor Frame Size 254T
Minimum Motor Size 1 [hp]
Maximum Motor Size 15 [hp]
22.25
Wheel Diameter
Outlet Area
Outlet Velocity
Peak Power
Tip Speed
Imperial data — Metric data
cfm / 5.12
3
m
/s / 3.01
(rpm / 811)
(rpm / 894)
rpm x 5.83
rpm x 0.0296
565
5.12
0.476
[in.]
[mm]
[ft
[m2]
[ft/min]
[m/s]
3
[ft/min]
3
[m/s]
[ft/min]
[m/s]
2
]
STATIC PRESSURE (in. wg)
CFM OV
0.00 0.25 0.50 0.75 1.00 1.25 1.50 1.75 2.00
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
4000 781 401 0.11 523 0.28 618 0.47 708 0.69 792 0.93 874 1.19
5000 976 501 0.22 603 0.43 688 0.66 763 0.89 837 1.15 907 1.44 972 1.74 1040 2.06 1104 2.39
6000 1171 601 0.38 688 0.62 766 0.89 834 1.17 897 1.45 956 1.74 1019 2.07 1077 2.42 1132 2.77
7000 1367 701 0.6 778 0.88 847 1.18 911 1.51 968 1.83 1023 2.16 1075 2.49 1127 2.84 1180 3.23
8000 1562 802 0.9 869 1.22 930 1.55 990 1.91 1045 2.28 1096 2.65 1143 3.02 1191 3.4 1236 3.78
9000 1757 902 1.28 963 1.64 1019 2.01 1072 2.39 1124 2.8 1173 3.22 1218 3.63 1261 4.05 1304 4.47
10000 1953 1002 1.76 1058 2.16 1109 2.56 1157 2.97 1205 3.41 1252 3.87 1296 4.33 1337 4.79 1377 5.26
11000 2148 1102 2.34 1153 2.78 1201 3.22 1246 3.67 1288 4.13 1333 4.62 1375 5.12 1415 5.63 1454 6.14
12000 2343 1203 3.04 1249 3.52 1293 4 1336 4.48 1376 4.98 1416 5.49 1456 6.03 1495 6.57 1532 7.13
13000 2539 1303 3.87 1346 4.38 1387 4.9 1427 5.42 1465 5.96 1502 6.5 1539 7.06 1576 7.64 1612 8.23
14000 2734 1403 4.83 1444 5.38 1482 5.94 1519 6.5 1555 7.07 1590 7.65 1624 8.23 1658 8.84 1693 9.47
15000 2929 1503 5.95 1541 6.53 1577 7.13 1612 7.73 1647 8.34 1680 8.95 1712 9.57 1743 10.19 1776 10.85
16000 3125 1603 7.22 1639 7.84 1673 8.48 1706 9.12 1739 9.76 1771 10.41 1801 11.07 1831 11.73 1861 12.39
17000 3320 1704 8.65 1737 9.32 1770 9.99 1801 10.67 1832 11.35 1862 12.04 1892 12.73 1921 13.43 1949 14.14
18000 3515 1804 10.3 1836 11 1867 11.7 1897 12.4 1926 13.1 1954 13.9
19000 3710 1904 12.1 1934 12.8 1964 13.6
STATIC PRESSURE (in. wg)
CFM OV
1.50 2.00 2.50 3.00 3.50 4.00 4.50 5.00 5.50
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
7000 1367 1075 2.49 1180 3.23 1279 4.03 1373 4.87 1469 5.78 1559 6.71
7600 1484 1116 2.8 1210 3.53 1309 4.37 1398 5.25 1484 6.16 1574 7.14 1658 8.15 1738 9.18
8200 1601 1157 3.14 1250 3.91 1338 4.74 1428 5.66 1510 6.61 1587 7.59 1672 8.64 1752 9.71 1828 10.81
8800 1718 1203 3.5 1291 4.33 1373 5.17 1457 6.09 1539 7.09 1616 8.11 1688 9.15 1767 10.26 1843 11.4
9400 1835 1249 3.9 1331 4.78 1413 5.66 1488 6.56 1569 7.59 1645 8.65 1717 9.74 1786 10.85 1857 12.01
10000 1953 1296 4.33 1377 5.26 1454 6.19 1528 7.14 1599 8.12 1675 9.22 1747 10.35 1815 11.51 1880 12.69
10600 2070 1343 4.79 1423 5.77 1495 6.77 1569 7.76 1637 8.77 1705 9.82 1776 11 1844 12.19 1909 13.41
11200 2187 1391 5.29 1469 6.33 1541 7.37 1609 8.42 1677 9.47 1741 10.54 1806 11.67 1874 12.91 1938 14.17
11800 2304 1440 5.84 1516 6.92 1587 8.01 1652 9.11 1718 10.22 1781 11.33 1842 12.47 1903 13.66 1968 14.97
12400 2421 1489 6.42 1564 7.55 1633 8.7 1698 9.85 1759 11.02 1822 12.17 1882 13.35 1939 14.54
13000 2539 1539 7.06 1612 8.23 1680 9.43 1744 10.63 1804 11.84 1863 13.06 1923 14.28
13600 2656 1589 7.74 1660 8.96 1727 10.2 1790 11.46 1849 12.71 1906 13.99 1963 15.27
14200 2773 1641 8.49 1710 9.73 1775 11.02 1837 12.34 1896 13.64 1951 14.96
14800 2890 1694 9.29 1759 10.56 1824 11.89 1884 13.25 1942 14.63
15400 3007 1748 10.1 1809 11.4 1872 12.8 1932 14.2
16000 3125 1801 11.1 1861 12.4 1922 13.8
Performance shown is for model LSF with outlet duct. Power ratings (Bhp) do not include transmission losses.
14
Page Header
Static Pressure (in. wg)
Static Pressure (Pa x 100)
Volume (cfm x 1000)
3
Volume (m /hr x 1000)
0 1 2 3 4
0
2
4
6
8
10
12
14
16
0 5 10 15 20 25
0
1
2
3
4
5
6
7
LSF-24
Constant rpm
Constant hp
Density 0.075 lb/ft
3
Density 1.2 kg/m
3
670
767
844
966
1146
1311
1443
1550
1½
2
3
5
7½
10
1
15
20
1652
1680
D
O
N
O
T
S
E
L
E
C
T
T
O
T
H
E
L
E
F
T
O
F
T
H
I
S
S
Y
ST
E
M
C
U
R
V
E
LSF-24
Maximum rpm 1776
Maximum Motor Frame Size 256T
Minimum Motor Size 1 [hp]
Maximum Motor Size 20 [hp]
24.50
Wheel Diameter
Outlet Area
Outlet Velocity
Peak Power
Tip Speed
Imperial data — Metric data
cfm / 6.21
3
m
/s / 3.66
(rpm / 701)
(rpm / 773)
rpm x 6.41
rpm x 0.0326
622
6.21
0.577
[in.]
[mm]
[ft
[m2]
[ft/min]
[m/s]
3
[ft/min]
3
[m/s]
[ft/min]
[m/s]
2
]
STATIC PRESSURE (in. wg)
CFM OV
0.00 0.25 0.50 0.75 1.00 1.25 1.50 1.75 2.00
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
5000 805 358 0.12 464 0.33 557 0.56 647 0.83 726 1.12 800 1.43
6200 998 444 0.23 532 0.48 609 0.75 685 1.05 759 1.37 827 1.72 891 2.08 952 2.46 1010 2.85
7400 1191 530 0.39 605 0.69 673 1 738 1.33 802 1.68 863 2.06 924 2.46 981 2.87 1034 3.3
8600 1384 616 0.61 682 0.96 742 1.32 800 1.69 854 2.06 910 2.47 963 2.89 1017 3.34 1069 3.81
9800 1578 702 0.91 759 1.29 815 1.71 865 2.13 916 2.54 963 2.96 1013 3.43 1061 3.9 1106 4.39
11000 1771 788 1.28 838 1.71 890 2.18 937 2.64 982 3.11 1027 3.57 1069 4.05 1114 4.55 1157 5.08
12200 1964 874 1.75 919 2.21 966 2.73 1010 3.25 1051 3.76 1092 4.28 1133 4.79 1171 5.32 1210 5.86
13400 2157 959 2.32 1001 2.83 1044 3.38 1085 3.96 1124 4.52 1161 5.08 1198 5.65 1236 6.22 1271 6.79
14600 2351 1045 3 1084 3.55 1122 4.13 1162 4.76 1199 5.39 1234 6 1267 6.62 1301 7.24 1336 7.85
15800 2544 1131 3.8 1167 4.4 1202 5.01 1239 5.68 1274 6.37 1307 7.03 1340 7.7 1371 8.37 1402 9.04
17000 2737 1217 4.73 1251 5.37 1283 6.03 1317 6.73 1350 7.46 1382 8.21 1413 8.91 1443 9.62 1472 10.35
18200 2930 1303 5.81 1335 6.49 1365 7.19 1396 7.93 1427 8.7 1458 9.49 1488 10.27 1516 11.03 1544 11.79
19400 3123 1389 7.03 1419 7.76 1447 8.51 1475 9.27 1505 10.09 1535 10.92 1563 11.76 1591 12.59 1618 13.39
20600 3317 1475 8.42 1503 9.2 1530 9.98 1556 10.78 1584 11.63 1612 12.51 1640 13.39 1666 14.29
21800 3510 1561 9.98 1587 10.8 1613 11.63 1638 12.47 1663 13.34
23000 3703 1647 11.7 1672 12.6
STATIC PRESSURE (in. wg)
CFM OV
1.50 2.00 2.50 3.00 3.50 4.00 4.50 5.00 5.50
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
7000 1127 912 2.33 1025 3.15 1130 4.02
7800 1256 936 2.6 1045 3.46 1146 4.38 1241 5.35 1328 6.36
8600 1384 -963 2.89 1069 3.81 1165 4.78 1256 5.8 1343 6.86 1425 7.95
9400 1513 -996 3.24 1093 4.18 1189 5.21 1276 6.27 1359 7.38 1440 8.53 1517 9.71 1589 10.92
10200 1642 1032 3.62 1123 4.61 1213 5.66 1299 6.78 1379 7.93 1456 9.13 1532 10.37 1604 11.64 1673 12.93
11000 1771 1069 4.05 1157 5.08 1239 6.16 1323 7.32 1403 8.53 1477 9.77 1548 11.05 1620 12.37
11800 1900 1111 4.53 1192 5.59 1272 6.73 1347 7.89 1427 9.16 1501 10.46 1571 11.79 1637 13.14
12600 2028 1155 5.07 1229 6.15 1306 7.33 1380 8.56 1451 9.82 1525 11.18 1595 12.56 1661 13.97
13400 2157 1198 5.65 1271 6.79 1342 7.99 1414 9.27 1482 10.57 1549 11.93 1619 13.37
14200 2286 1243 6.29 1314 7.48 1380 8.71 1449 10.02 1516 11.39 1579 12.78 1643 14.22
15000 2415 1291 6.96 1358 8.23 1422 9.51 1484 10.83 1550 12.25 1613 13.7 1672 15.17
15800 2544 1340 7.7 1402 9.04 1465 10.37 1525 11.73 1585 13.16 1647 14.67
16600 2673 1389 8.49 1448 9.9 1509 11.3 1567 12.71 1622 14.15
17400 2801 1438 9.35 1496 10.81 1553 12.29 1610 13.76 1664 15.25
18200 2930 1488 10.3 1544 11.8 1597 13.3 1654 14.9
19000 3059 1538 11.3 1593 12.8 1645 14.5
Performance shown is for model LSF with outlet duct. Power ratings (Bhp) do not include transmission losses.
15
LSF-27
Static Pressure (in. wg)
Static Pressure (Pa x 100)
Volume (cfm x 1000)
3
Volume (m /hr x 1000)
0 1 2 3 4 5
0
2
4
6
8
10
12
14
16
0 5 10 15 20 25 30
0
1
2
3
4
5
6
7
LSF-27
Constant rpm
Constant hp
Density 0.075 lb/ft
3
Density 1.2 kg/m
3
652
718
821
974
1115
1227
1300
1405
1½
2
3
5
7½
10
15
20
1525
D
O
N
O
T
S
E
L
E
C
T
T
O
T
H
E
L
E
F
T
O
F
T
H
I
S
S
Y
S
T
E
M
C
U
RV
E
Maximum rpm 1611
Maximum Motor Frame Size 256T
Minimum Motor Size 1
Maximum Motor Size 20 [hp]
Wheel Diameter
Outlet Area
Outlet Velocity
Peak Power
Tip Speed
Imperial data — Metric data
CFM OV
m
(rpm / 605)
(rpm / 667)
rpm x 7.07
rpm x 0.0359
0.00 0.25 0.50 0.75 1.00 1.25 1.50 1.75 2.00
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
5000 663 267 0.08 380 0.29 480 0.55 567 0.85
6500 862 348 0.18 438 0.45 519 0.74 596 1.08 666 1.45 732 1.84 793 2.25
8000 1061 428 0.33 504 0.66 571 1 637 1.38 700 1.78 761 2.22 817 2.67 871 3.14 923 3.64
9500 1259 508 0.56 573 0.95 632 1.35 688 1.75 744 2.2 796 2.66 850 3.16 901 3.68 949 4.22
11000 1458 588 0.87 645 1.31 698 1.77 748 2.24 796 2.71 844 3.22 891 3.75 935 4.3 982 4.88
12500 1657 669 1.28 718 1.76 767 2.3 811 2.83 856 3.35 898 3.89 940 4.45 982 5.05 1022 5.66
14000 1856 749 1.79 793 2.33 838 2.92 879 3.52 918 4.11 958 4.7 995 5.3 1031 5.91 1071 6.57
15500 2055 829 2.43 869 3.02 910 3.67 949 4.33 985 4.98 1019 5.64 1056 6.29 1090 6.95 1123 7.63
17000 2254 909 3.21 946 3.85 983 4.54 1019 5.27 1054 5.99 1086 6.71 1118 7.44 1151 8.15 1183 8.87
18500 2453 990 4.13 1023 4.83 1056 5.56 1091 6.35 1123 7.16 1155 7.93 1184 8.71 1213 9.5 1244 10.27
20000 2652 1070 5.22 1101 5.98 1131 6.75 1163 7.59 1194 8.45 1224 9.32 1253 10.15 1280 10.99 1307 11.85
21500 2851 1150 6.49 1179 7.3 1207 8.13 1237 9 1266 9.92 1295 10.86 1322 11.77 1348 12.67 1374 13.57
23000 3050 1230 7.94 1258 8.81 1284 9.69 1311 10.6 1339 11.58 1366 12.57 1392 13.57 1417 14.54 1442 15.49
24500 3249 1311 9.6 1337 10.52 1361 11.46 1385 12.41 1412 13.43 1438 14.48 1463 15.54 1487 16.61 1511 17.63
26000 3448 1391 11.5 1415 12.5 1439 13.4 1462 14.4 1486 15.5 1511 16.6
27500 3647 1471 13.6 1494 14.6 1517 15.7
27.00
686
7.54
0.700
cfm / 7.54
3
/s / 4.44
1
⁄2 [hp]
[in.]
[mm]
[ft
[m2]
[ft/min]
[m/s]
3
[ft/min]
3
[m/s]
[ft/min]
[m/s]
2
]
STATIC PRESSURE (in. wg)
STATIC PRESSURE (in. wg)
CFM OV
1.50 2.00 2.50 3.00 3.50 4.00 4.50 5.00 5.50
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
11000 1458 891 3.75 982 4.88 1069 6.1 1148 7.36 1227 8.69 1301 10.05 1370 11.46
11800 1564 916 4.11 1001 5.27 1087 6.54 1166 7.85 1239 9.22 1312 10.64 1382 12.11 1447 13.6 1510 15.14
12600 1671 943 4.51 1026 5.72 1105 7 1184 8.37 1256 9.79 1324 11.25 1393 12.77 1459 14.33 1521 15.92
13400 1777 972 4.94 1051 6.19 1125 7.51 1202 8.92 1274 10.39 1341 11.9 1405 13.45 1470 15.07
14200 1883 1003 5.42 1078 6.7 1150 8.07 1220 9.49 1292 11.02 1359 12.59 1423 14.19 1483 15.83
15000 1989 1035 5.95 1104 7.25 1176 8.67 1243 10.13 1310 11.67 1377 13.3 1440 14.96 1500 16.65
15800 2095 1068 6.51 1135 7.86 1202 9.31 1268 10.82 1330 12.38 1395 14.03 1458 15.75 1518 17.51
16600 2201 1101 7.12 1167 8.52 1228 9.98 1293 11.55 1355 13.16 1413 14.81 1476 16.58
17400 2307 1135 7.76 1199 9.23 1258 10.73 1320 12.32 1380 13.99 1438 15.69 1494 17.44
18200 2413 1171 8.44 1231 9.98 1290 11.53 1346 13.13 1406 14.86 1463 16.61 1517 18.4
19000 2519 1207 9.17 1264 10.78 1322 12.39 1376 14.03 1432 15.77 1488 17.58
19800 2625 1244 9.94 1298 11.63 1354 13.3 1408 14.99 1459 16.72 1515 18.59
20600 2732 1280 10.8 1333 12.5 1387 14.3 1440 16 1489 17.8
21400 2838 1317 11.7 1369 13.5 1420 15.3 1472 17.1 1521 18.9
22200 2944 1355 12.6 1406 14.4 1454 16.3 1504 18.2
23000 3050 1392 13.6 1442 15.5 1489 17.4
Performance shown is for model LSF with outlet duct. Power ratings (Bhp) do not include transmission losses.
16
LSF-30
Static Pressure (in. wg)
Static Pressure (Pa x 100)
Volume (cfm x 1000)
3
Volume (m /hr x 1000)
0 1 2 3 4 5
0
2
4
6
8
10
12
14
16
0 5 10 15 20 25 30 35
0
1
2
3
4
5
6
7
LSF-30
Constant rpm
Constant hp
Density 0.075 lb/ft
3
Density 1.2 kg/m
3
554
610
698
828
947
1043
1194
1½
2
3
5
7½
10
15
20
1314
1348
25
D
O
N
O
T
S
E
L
E
C
T
T
O
T
H
E
L
E
F
T
O
F
T
H
I
S
S
Y
S
T
E
M
C
U
R
V
E
Maximum rpm 1348
Maximum Motor Frame Size 284T
Minimum Motor Size 2 [hp]
Maximum Motor Size 25 [hp]
30.00
Wheel Diameter
Outlet Area
Outlet Velocity
Peak Power
Tip Speed
Imperial data — Metric data
CFM OV
cfm / 9.31
3
m
/s / 5.48
(rpm / 485)
(rpm / 535)
rpm x 7.85
rpm x 0.0399
0.00 0.25 0.50 0.75 1.00 1.25 1.50 1.75 2.00
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
10000 1074 389 0.44 459 0.83 520 1.23 574 1.66 625 2.14 677 2.67 724 3.22 768 3.79 811 4.38
11500 1235 447 0.67 508 1.12 564 1.57 615 2.04 661 2.54 707 3.09 752 3.68 795 4.3 835 4.93
13000 1396 506 0.97 559 1.48 611 1.98 658 2.5 702 3.03 743 3.61 784 4.22 822 4.86 863 5.54
14500 1557 564 1.35 612 1.91 660 2.47 704 3.04 745 3.62 783 4.22 820 4.86 858 5.54 893 6.24
16000 1718 622 1.81 667 2.43 710 3.05 751 3.67 790 4.31 827 4.95 862 5.61 895 6.3 929 7.05
17500 1879 681 2.37 722 3.04 761 3.73 800 4.4 837 5.09 871 5.79 905 6.49 937 7.21 967 7.94
19000 2040 739 3.03 777 3.76 812 4.51 850 5.24 885 5.98 917 6.73 949 7.49 980 8.25 1010 9.03
20500 2201 797 3.81 833 4.59 866 5.39 900 6.19 933 6.98 965 7.78 995 8.6 1025 9.42 1054 10.24
22000 2363 856 4.71 889 5.55 920 6.4 951 7.27 983 8.11 1014 8.96 1043 9.83 1070 10.71 1098 11.58
23500 2524 914 5.74 945 6.63 975 7.54 1003 8.47 1033 9.37 1063 10.28 1091 11.2 1118 12.12 1144 13.06
25000 2685 973 6.91 1002 7.86 1030 8.82 1057 9.81 1084 10.78 1113 11.74 1140 12.71 1166 13.69 1191 14.67
26500 2846 1031 8.23 1059 9.23 1085 10.25 1111 11.29 1135 12.34 1163 13.35 1189 14.37 1215 15.4 1239 16.44
28000 3007 1089 9.7 1116 10.77 1141 11.84 1165 12.94 1189 14.04 1214 15.13 1239 16.2 1264 17.28 1288 18.37
29500 3168 1148 11.3 1173 12.5 1197 13.6 1220 14.7 1243 15.9 1265 17.1 1290 18.2 1314 19.3 1337 20.5
31000 3329 1206 13.2 1230 14.3 1253 15.5 1276 16.7 1297 17.9 1318 19.2 1341 20.4
32500 3490 1264 15.2 1287 16.4 1310 17.6 1331 18.9
762
9.31
0.865
[in.]
[mm]
[ft
[m2]
[ft/min]
[m/s]
3
[ft/min]
3
[m/s]
[ft/min]
[m/s]
2
]
STATIC PRESSURE (in. wg)
STATIC PRESSURE (in. wg)
CFM OV
1.50 2.00 2.50 3.00 3.50 4.00 4.50 5.00 5.50
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
12500 1342 772 4.03 854 5.33 928 6.72 996 8.18 1064 9.71 1128 11.3
13500 1450 796 4.43 872 5.76 946 7.21 1013 8.73 1076 10.31 1139 11.96 1199 13.66
14500 1557 820 4.86 893 6.24 964 7.73 1031 9.31 1092 10.95 1151 12.65 1210 14.41 1267 16.22 1320 18.08
15500 1664 847 5.34 917 6.77 982 8.27 1049 9.92 1110 11.62 1168 13.38 1222 15.19 1278 17.06 1332 18.98
16500 1772 876 5.89 941 7.34 1005 8.9 1068 10.56 1129 12.32 1186 14.14 1240 16.01 1291 17.93 1343 19.91
17500 1879 905 6.49 967 7.94 1030 9.58 1088 11.26 1147 13.06 1204 14.94 1258 16.87 1309 18.85
18500 1987 935 7.14 996 8.66 1054 10.29 1112 12.04 1166 13.84 1222 15.78 1276 17.77 1327 19.81
19500 2094 965 7.84 1024 9.42 1080 11.05 1136 12.87 1189 14.73 1241 16.65 1294 18.71 1345 20.81
20500 2201 995 8.6 1054 10.24 1108 11.93 1160 13.74 1213 15.66 1263 17.64 1313 19.68
21500 2309 1027 9.4 1083 11.12 1137 12.87 1186 14.66 1238 16.65 1287 18.69 1334 20.77
22500 2416 1059 10.3 1113 12.1 1166 13.9 1215 15.7 1262 17.7 1311 19.8
23500 2524 1091 11.2 1144 13.1 1195 14.9 1244 16.9 1289 18.8 1336 20.9
24500 2631 1123 12.2 1175 14.1 1225 16.1 1273 18.1 1318 20.1
25500 2738 1156 13.2 1207 15.2 1255 17.3 1302 19.3 1347 21.4
26500 2846 1189 14.4 1239 16.4 1286 18.5 1332 20.7
27500 2953 1223 15.6 1271 17.7 1317 19.9
Performance shown is for model LSF with outlet duct. Power ratings (Bhp) do not include transmission losses.
17
LSF-33
Static Pressure (in. wg)
Static Pressure (Pa x 100)
Volume (cfm x 1000)
3
Volume (m /hr x 1000)
0 1 2 3 4 5 6 7
0
2
4
6
8
10
12
14
16
0 5 10 15 20 25 30 35 40 45
0
1
2
3
4
5
6
7
LSF-33
Constant rpm
Constant hp
Density 0.075 lb/ft
3
Density 1.2 kg/m
3
508
582
689
789
869
994
1094
2
3
5
7½
10
15
20
1179
1225
25
30
D
O
N
O
T
S
E
L
E
C
T
T
O
T
H
E
L
E
F
T
O
F
T
H
I
S
S
Y
S
T
E
M
C
U
R
V
E
Maximum rpm 1225
Maximum Motor Frame Size 286T
Minimum Motor Size 2 [hp]
Maximum Motor Size 30 [hp]
33.00
Wheel Diameter
Outlet Area
Outlet Velocity
Peak Power
Tip Speed
Imperial data — Metric data
CFM OV
cfm / 11.27
3
m
/s / 6.63
(rpm / 404)
(rpm / 446)
rpm x 8.64
rpm x 0.0439
0.00 0.25 0.50 0.75 1.00 1.25 1.50 1.75 2.00
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
10000 887 286 0.3 359 0.71 423 1.14 479 1.63 534 2.17 585 2.76
12000 1064 344 0.53 407 1 462 1.49 512 2.04 561 2.62 607 3.23 651 3.91 694 4.62 736 5.39
14000 1242 401 0.84 457 1.39 505 1.96 551 2.54 595 3.18 636 3.85 676 4.55 716 5.28 754 6.07
16000 1419 458 1.25 508 1.88 552 2.52 594 3.18 634 3.85 672 4.58 708 5.34 744 6.12 779 6.92
18000 1597 515 1.78 561 2.49 601 3.2 638 3.93 675 4.67 711 5.43 745 6.25 776 7.09 810 7.95
20000 1774 573 2.44 614 3.22 651 4.02 685 4.82 719 5.64 752 6.46 784 7.3 815 8.2 845 9.12
22000 1952 630 3.24 668 4.11 702 4.99 734 5.85 766 6.74 796 7.66 826 8.55 855 9.46 884 10.45
24000 2129 687 4.21 722 5.16 754 6.11 785 7.06 813 8.01 842 8.99 869 9.99 897 10.96 924 11.95
26000 2307 744 5.35 777 6.38 807 7.4 836 8.44 863 9.47 889 10.51 915 11.58 941 12.66 966 13.71
28000 2484 802 6.69 832 7.79 861 8.89 888 10.01 913 11.12 938 12.22 963 13.35 987 14.51 1010 15.67
30000 2661 859 8.22 888 9.4 914 10.59 940 11.78 964 12.98 988 14.16 1011 15.35 1034 16.56 1057 17.8
32000 2839 916 9.98 943 11.23 969 12.51 993 13.77 1016 15.05 1039 16.31 1061 17.57 1082 18.85 1104 20.15
34000 3016 974 12 999 13.3 1023 14.7 1046 16 1069 17.3 1090 18.7 1111 20 1132 21.4 1152 22.7
36000 3194 1031 14.2 1055 15.6 1078 17 1100 18.5 1121 19.9 1142 21.3 1162 22.8 1182 24.2 1201 25.6
38000 3371 1088 16.7 1111 18.2 1133 19.7 1154 21.2 1174 22.7 1194 24.2 1214 25.7
40000 3549 1145 19.5 1167 21.1 1188 22.6 1208 24.2
838
11.3
1.05
[in.]
[mm]
[ft
[m2]
[ft/min]
[m/s]
3
[ft/min]
3
[m/s]
[ft/min]
[m/s]
2
]
STATIC PRESSURE (in. wg)
STATIC PRESSURE (in. wg)
CFM OV
1.50 2.00 2.50 3.00 3.50 4.00 4.50 5.00 5.50
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
17500 1552 735 6.01 802 7.68 865 9.43 927 11.36 985 13.38 1044 15.57
18500 1641 755 6.5 818 8.23 880 10.05 939 11.96 997 14.05 1051 16.21 1107 18.53 1159 20.92
19500 1730 774 7.03 834 8.81 896 10.69 952 12.64 1009 14.73 1063 16.95 1114 19.25 1167 21.71 1217 24.22
20500 1818 794 7.59 855 9.44 911 11.37 968 13.39 1020 15.45 1074 17.73 1125 20.07 1174 22.51 1224 25.08
21500 1907 815 8.22 874 10.1 927 12.09 983 14.17 1035 16.3 1086 18.53 1137 20.94 1184 23.4
22500 1996 837 8.89 893 10.8 947 12.86 999 14.99 1051 17.19 1100 19.44 1149 21.83 1196 24.36
23500 2085 858 9.61 913 11.55 967 13.67 1015 15.84 1067 18.12 1115 20.44 1161 22.8 1208 25.35
24500 2173 881 10.4 934 12.4 986 14.5 1035 16.8 1082 19.1 1130 21.5 1176 23.9 1219 26.4
25500 2262 904 11.2 956 13.3 1006 15.4 1054 17.7 1099 20.1 1146 22.5 1192 25
26500 2351 927 12 977 14.2 1026 16.4 1074 18.7 1119 21.2 1162 23.7 1207 26.2
27500 2440 951 12.9 999 15.2 1047 17.4 1093 19.8 1138 22.3 1179 24.8 1223 27.5
28500 2528 975 13.8 1022 16.2 1068 18.5 1113 20.9 1157 23.5 1199 26.1
29500 2617 999 14.8 1045 17.2 1090 19.7 1134 22.1 1177 24.7 1218 27.4
30500 2706 1024 15.9 1068 18.4 1112 20.9 1155 23.4 1196 26
31500 2795 1048 17 1092 19.5 1134 22.1 1176 24.7 1217 27.3
32500 2883 1073 18.2 1116 20.8 1157 23.5 1198 26.1
Performance shown is for model LSF with outlet duct. Power ratings (Bhp) do not include transmission losses.
18
LSF-36
Static Pressure (in. wg)
Static Pressure (Pa x 100)
Volume (cfm x 1000)
3
Volume (m /hr x 1000)
0 2 4 6 8 10
0
2
4
6
8
10
12
14
16
0 1 2 3 4 5 6
0
1
2
3
4
5
6
7
LSF-36
Constant rpm
Constant hp
Density 0.075 lb/ft
3
Density 1.2 kg/m
3
422
483
573
656
722
826
909
2
3
5
7½
10
15
20
979
1041
25
30
1108
40
D
O
N
O
T
S
E
L
E
C
T
T
O
T
H
E
L
E
F
T
O
F
T
H
I
S
S
Y
S
T
E
M
C
U
R
V
E
Maximum rpm 1108
Maximum Motor Frame Size 324T
Minimum Motor Size 3 [hp]
Maximum Motor Size 40 [hp]
36.50
Wheel Diameter
Outlet Area
Outlet Velocity
Peak Power
Tip Speed
Imperial data — Metric data
CFM OV
cfm / 13.79
3
m
/s / 8.12
(rpm / 335)
(rpm / 369)
rpm x 9.56
rpm x 0.0485
0.00 0.25 0.50 0.75 1.00 1.25 1.50 1.75 2.00
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
15000 1087 309 0.68 367 1.28 415 1.9 463 2.6 506 3.3 550 4.08 592 4.97 630 5.89
17500 1269 361 1.09 411 1.78 454 2.48 496 3.23 537 4.06 575 4.88 610 5.71 649 6.68 684 7.72
20000 1450 412 1.62 457 2.41 497 3.22 534 4.03 569 4.89 606 5.85 639 6.79 672 7.73 703 8.68
22500 1631 464 2.31 504 3.18 541 4.11 574 5 607 5.94 638 6.91 671 7.97 702 9.05 732 10.09
25000 1812 515 3.17 551 4.13 586 5.15 618 6.16 646 7.15 676 8.21 705 9.28 734 10.44 762 11.64
27500 1994 567 4.22 600 5.27 632 6.38 662 7.51 689 8.6 715 9.7 743 10.87 769 12.05 794 13.28
30000 2175 618 5.48 648 6.61 678 7.82 707 9.05 733 10.26 758 11.45 781 12.66 807 13.93 831 15.21
32500 2356 670 6.97 698 8.18 725 9.48 752 10.8 778 12.15 801 13.44 824 14.73 845 16.04 869 17.41
35000 2538 721 8.7 747 10.01 773 11.39 798 12.81 822 14.25 846 15.68 867 17.06 888 18.45 908 19.86
37500 2719 773 10.7 797 12.1 821 13.6 844 15.1 868 16.6 890 18.2 911 19.7 931 21.1 951 22.6
40000 2900 824 13 847 14.5 870 16 892 17.6 914 19.3 935 20.9 956 22.6 975 24.1 994 25.7
42500 3081 876 15.6 897 17.2 918 18.8 940 20.5 960 22.2 981 23.9 1001 25.7 1020 27.5 1038 29.1
45000 3263 927 18.5 948 20.2 967 21.9 988 23.7 1007 25.5 1027 27.3 1046 29.1 1065 31 1083 32.9
47500 3444 979 21.7 998 23.5 1017 25.3 1036 27.2 1055 29.1 1073 31 1092 32.9
50000 3625 1031 25.4 1049 27.2 1067 29.1 1085 31 1103 33
52500 3807 1082 29.4 1100 31.3
927
13.8
1.28
[in.]
[mm]
[ft
[m2]
[ft/min]
[m/s]
3
[ft/min]
3
[m/s]
[ft/min]
[m/s]
2
]
STATIC PRESSURE (in. wg)
STATIC PRESSURE (in. wg)
CFM OV
1.50 2.00 2.50 3.00 3.50 4.00 4.50 5.00 5.50
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
20000 1450 639 6.79 703 8.68 768 10.98 828 13.42
21500 1559 658 7.49 720 9.51 780 11.68 839 14.21 893 16.85
23000 1667 677 8.21 737 10.39 793 12.56 850 15.04 904 17.77 955 20.59
24500 1776 697 8.99 756 11.34 810 13.62 861 15.95 915 18.73 966 21.65 1014 24.65
26000 1885 720 9.89 775 12.28 828 14.74 878 17.19 927 19.73 977 22.75 1025 25.84 1070 29.03
27500 1994 743 10.9 794 13.3 847 15.9 896 18.5 942 21.1 988 23.9 1036 27.1 1081 30.4
29000 2102 766 11.9 816 14.4 866 17.1 914 19.9 959 22.6 1002 25.3 1047 28.4 1092 31.7
30500 2211 789 13 838 15.6 885 18.3 932 21.3 977 24.1 1020 27 1060 29.9 1103 33.1
32000 2320 815 14.3 861 17 906 19.7 951 22.7 995 25.8 1037 28.8 1078 31.8
33500 2429 841 15.6 884 18.4 928 21.2 971 24.2 1014 27.4 1056 30.6 1095 33.7
35000 2538 867 17.1 908 19.9 951 22.8 991 25.8 1033 29.1 1074 32.5
36500 2646 894 18.6 933 21.5 974 24.5 1014 27.6 1052 30.9 1093 34.4
38000 2755 920 20.2 959 23.2 997 26.3 1037 29.6 1074 32.8
39500 2864 947 22 985 25.1 1021 28.2 1060 31.6 1096 34.9
41000 2973 974 23.8 1012 27 1047 30.3 1083 33.7
42500 3081 1001 25.7 1038 29.1 1073 32.5 1106 35.9
Performance shown is for model LSF with outlet duct. Power ratings (Bhp) do not include transmission losses.
19
Typical Specifications
Roof mounted, filtered supply fans shall be of the belt-driven,
double width/double inlet, centrifugal blower type.
Hoods shall be louvered penthouses constructed of heavy
gauge extruded aluminum louvers with mitered corners.
Hoods shall include insulated and hinged aluminum covers.
Base panels shall have prepunched mounting holes.
Permanent washable 2-inch aluminum filters shall be
provided.
Fan wheels shall be of the flat blade, backward inclined type (sizes 12-16) or airfoil type
(sizes 18-36), constructed of heavy gauge steel, and statically and dynamically balanced
to ensure smooth, vibration free operation.
Motors shall be carefully matched to the fan load and furnished at the specified voltage,
phase and enclosure.
The fan shaft shall be precision turned, ground and polished steel sized so that the first
critical speed shall be at least 25% over the maximum operating speed.
Bearings shall be of the highest quality ball or roller type mounted in cast iron pillow
blocks with grease fittings. Bearings shall be selected for a minimum (L10) life in excess
of 80,000 hours at maximum cataloged operating speeds. Pulleys shall be of the fully
machined cast iron type, keyed and securely attached to the wheel and motor shafts.
Motor sheaves shall be adjustable for final system balancing. Drives shall be sized for
a minimum of 150% of driven horsepower. The entire fan and motor assembly shall be
mounted on vibration isolators to reduce noise transmission. Lifting lugs shall be provided.
Fans shall be Model LSF as manufactured by Greenheck Fan Corporation of Schofield,
Wisconsin, USA.
Building Value in Air
Greenheck delivers value
to mechanical engineers by
helping them solve virtually
any air quality challenges
their clients face with a
comprehensive selection of
top quality, innovative airrelated equipment. We offer
extra value to contractors
by providing easy-to-install,
competitively priced, reliable
products that arrive on time.
And building owners and
occupants value the energy
efficiency, low maintenance
and quiet dependable operation
they experience long after the
construction project ends.
Our Warranty
Greenheck warrants this equipment to be free from defects in material and workmanship for a period
of one year from the purchase date. Any units or parts which prove defective during the warranty
period will be replaced at our option when returned to our factory, transportation prepaid. Motors are
warranted by the motor manufacturer for a period of one year. Should motors furnished by Greenheck
prove defective during this period, they should be returned to the nearest authorized motor service
station. Greenheck will not be responsible for any removal or installation costs.
As a result of our commitment to continuous improvement, Greenheck reserves the right to change
specifications without notice.
Prepared to Support
Green Building Efforts
P.O. Box 410 • Schofield, WI 54476-0410 • Phone (715) 359-6171 • greenheck.com
20
Copyright © 2008 Greenheck Fan Corp.
LSF Rev. 3 August 2008 IP
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