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    Centrifugal Downblast Exhaust Fan, Product # GB-100-LMD119XQD

    Centrifugal Downblast Exhaust Fan, Product # GB-100-LMD119XQD

    • 19 x 19 inch base with prepunched mounting holes for easy attachment to roof curb
    • Multiple motor and drive options available to meet any performance and application need
    • 14.5 x 14.5 inch recommended roof opening
    • Shipping Type:
      Freight
    $543.00
    In stock 
    2 on Hand
    Free shipping
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    • 19 x 19 inch base with prepunched mounting holes for easy attachment to roof curb
    • Multiple motor and drive options available to meet any performance and application need
    • 14.5 x 14.5 inch recommended roof opening
    • Shipping Type:
      Freight

    Model GB, belt drive centrifugal roof exhaust fans are designed to meet the general clean air exhaust requirements for industrial and commercial buildings. Units feature a fully rolled windband bead for increased stability and easy transport. Fresh outside air is drawn in under the motor cover to maximize motor life. Ideal for new installations or for retrofit, replacement applications. Curb adapters and reducers available to eliminate the need to field fabricate transitions when there is an existing roof curb.

    • Centrifugal wheel provides high-efficiency and minimal sound
    • True vibration isolation supports the motor and wheel for long life and quiet operation
    • One-piece aluminum curb cap provides a weather-tight fit
    • Galvanized birdscreen protects the fan discharge from birds and small objects
    • Fully rolled windband bead for increased stability and easy transport
    • Positive motor cooling with fresh air results in maximm motor life
    • Permanent embossed aluminum nameplate for exact model and serial number identification
    • Suitable for High Wind applications
    California Residents - Prop 65 Warning
    Specifications
    Base/Panel Length X Width
    19 x 19 in
    Curb Cap Size
    19 in
    Impeller Diameter
    11 3/8 in
    Roof Opening Width x Roof Opening Length
    14 1/2 x 14 1/2 in
    Base Height
    1 3/4 in
    Base Top to Shroud Top
    23 3/4 in
    Damper Width x Damper Height
    12 x 12 in
    Bearing Size
    3/4 in
    Height
    23 3/4 in
    Weight
    41 lbs
    Overall Diameter
    24 3/8 in
    Application
    Exhaust General and Clean Air
    High Wind
    Housing Material
    Spun Aluminum
    Drive Type
    Belt Drive
    Impeller Type
    Centrifugal Wheel
    Impeller Material
    Aluminum
    Certifications
    AMCA Sound & Air
    High Wind and Hurricane
    Seismic
    UL/cUL 705
    Drive Package Description
    No drive package included
    Required Accessory
    Roof curb for new installations
    Motor Included
    No
    Shipping Type
    Freight
    Warranty Length
    1 Year
    Performance
    CFM Range
    477-1526
    FRPM Range
    700-1800
    Ps (in. wg) 0 0.125 0.25 0.375 0.5 0.625 0.75 0.875 1 1.25
    1/4 0.02 720 700 CFM 610 477 - - - - - - - -
    Sones 3.8 2.8 - - - - - - - -
    Bhp 0.018 0.021 - - - - - - - -
    1/4 0.04 890 720 CFM 754 651 519 - - - - - - -
    Sones 4.8 4.1 3.4 - - - - - - -
    Bhp 0.035 0.04 0.04 - - - - - - -
    1/4 0.08 1110 890 CFM 941 855 774 663 - - - - - -
    Sones 6.4 5.9 5.5 5 - - - - - -
    Bhp 0.067 0.073 0.078 0.078 - - - - - -
    1/4 0.15 1380 1110 CFM 1170 1100 1033 969 886 782 - - - -
    Sones 9 8.5 8.2 8.2 7.8 7.3 - - - -
    Bhp 0.13 0.14 0.14 0.15 0.15 0.15 - - - -
    1/4 0.29 1720 1380 CFM 1458 1401 1346 1293 1246 1187 1120 1045 947 -
    Sones 12.3 11.9 11.5 11.4 11 10.4 10 9.5 9.2 -
    Bhp 0.25 0.26 0.27 0.28 0.29 0.29 0.29 0.29 0.29 -
    1/3 0.05 930 840 CFM 788 688 572 - - - - - - -
    Sones 5.1 4.4 3.8 - - - - - - -
    Bhp 0.04 0.044 0.046 - - - - - - -
    1/3 0.09 1160 930 CFM 983 901 826 726 570 - - - - -
    Sones 6.8 6.3 6 5.5 4.7 - - - - -
    Bhp 0.077 0.082 0.09 0.09 0.085 - - - - -
    1/3 0.17 1440 1160 CFM 1220 1153 1089 1031 954 865 733 - - -
    Sones 9.5 9 8.7 8.5 8.1 7.6 6.9 - - -
    Bhp 0.15 0.15 0.16 0.17 0.17 0.17 0.16 - - -
    1/3 0.33 1800 1440 CFM 1526 1471 1419 1368 1321 1270 1209 1142 1065 793
    Sones 13.5 12.9 12.6 12.6 12.4 11.5 11 10.7 10.3 10.3
    Bhp 0.29 0.3 0.3 0.31 0.33 0.33 0.33 0.33 0.33 0.3
    1/4 1/4 1/4 1/4 1/4 1/3 1/3 1/3 1/3
    0.02 0.04 0.08 0.15 0.29 0.05 0.09 0.17 0.33
    720 890 1110 1380 1720 930 1160 1440 1800
    700 720 890 1110 1380 840 930 1160 1440
    Ps (in. wg) CFM Sones Bhp CFM Sones Bhp CFM Sones Bhp CFM Sones Bhp CFM Sones Bhp CFM Sones Bhp CFM Sones Bhp CFM Sones Bhp CFM Sones Bhp
    0 610 3.8 0.018 754 4.8 0.035 941 6.4 0.067 1170 9 0.13 1458 12.3 0.25 788 5.1 0.04 983 6.8 0.077 1220 9.5 0.15 1526 13.5 0.29
    0.125 477 2.8 0.021 651 4.1 0.04 855 5.9 0.073 1100 8.5 0.14 1401 11.9 0.26 688 4.4 0.044 901 6.3 0.082 1153 9 0.15 1471 12.9 0.3
    0.25 - - - 519 3.4 0.04 774 5.5 0.078 1033 8.2 0.14 1346 11.5 0.27 572 3.8 0.046 826 6 0.09 1089 8.7 0.16 1419 12.6 0.3
    0.375 - - - - - - 663 5 0.078 969 8.2 0.15 1293 11.4 0.28 - - - 726 5.5 0.09 1031 8.5 0.17 1368 12.6 0.31
    0.5 - - - - - - - - - 886 7.8 0.15 1246 11 0.29 - - - 570 4.7 0.085 954 8.1 0.17 1321 12.4 0.33
    0.625 - - - - - - - - - 782 7.3 0.15 1187 10.4 0.29 - - - - - - 865 7.6 0.17 1270 11.5 0.33
    0.75 - - - - - - - - - - - - 1120 10 0.29 - - - - - - 733 6.9 0.16 1209 11 0.33
    0.875 - - - - - - - - - - - - 1045 9.5 0.29 - - - - - - - - - 1142 10.7 0.33
    1 - - - - - - - - - - - - 947 9.2 0.29 - - - - - - - - - 1065 10.3 0.33
    1.25 - - - - - - - - - - - - - - - - - - - - - - - - 793 10.3 0.3
    • Greenheck Fan Corporation certifies that the model shown herein is 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.
    • Performance certified is for installation type A: Free inlet, Free outlet.
    • Power rating (BHP/kW) includes transmission losses.
    • Performance ratings include the effects of birdscreen.
    • The sound ratings shown are loudness values in fan sones at 5 ft. (1.5 m) in a hemispherical free field calculated per AMCA Standard 301. Values shown are for installation type A: free inlet hemispherical sone levels.
    Videos

    Common methods for tensioning a rooftop exhaust fan belt

    Centering a wheel on a spun aluminum rooftop exhaust fan

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