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    Centrifugal Downblast Exhaust Fan, Product # GB-240-LMD134XQD, 2387-8355 CFM

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    Centrifugal Downblast Exhaust Fan, Product # GB-240-LMD134XQD, 2387-8355 CFM

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    CFM Range
    2387-8355
    CFM

    Mounting Location
    Roof

    Drive Package
    No drive package included

    • 34 x 34 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
    • 30.5 x 30.5 inch recommended roof opening

    • Shipping Type:
      Freight
    View other GB-240 products
    $1,865.85
    In stock 
    1 on Hand
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    CFM Range
    2387-8355
    CFM

    Mounting Location
    Roof

    Drive Package
    No drive package included

    • 34 x 34 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
    • 30.5 x 30.5 inch recommended roof opening

    • Shipping Type:
      Freight
    View other GB-240 products

    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 maximum motor life
    • Permanent embossed aluminum nameplate for exact model and serial number identification

    Similar to:

    1. ACME PV-180
    2. ACME PV-200
    3. ACME PV-220
    4. ACME PV-220
    5. ACME PV-240
    6. ACME PV-260
    7. Carnes VEBK-21
    8. Loren Cook ACEB-195
    9. Loren Cook ACEB-210
    10. Loren Cook ACEB-225
    11. Loren Cook ACEB-245
    12. Soler & Palau SDB-22
    13. Soler & Palau SDB-22
    14. Twin City Fan BCRD-240D
    15. Twin City Fan BCRD-240DHP

    California Residents-

    Prop 65 Warning
    California Title 20
    Specifications
    Base/Panel Length X Width
    34 x 34 in
    Curb Cap Size
    34 in
    Impeller Diameter
    24 3/4 in
    Roof Opening Width x Roof Opening Length
    30 1/2 x 30 1/2 in
    Base Height
    1 3/4 in
    Base Top to Shroud Top
    31 1/2 in
    Damper Width x Damper Height
    24 x 24 in
    Bearing Size
    1 in
    Height
    31 1/2 in
    Weight
    117 lbs
    Overall Diameter
    42 3/4 in
    Application
    Exhaust General and Clean Air
    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
    2387-8355
    FRPM Range
    420-910
    What do these terms (BHP, CFM, Sones, etc.) mean?

    California Title 20 | Fan Energy Index Boundaries
    Fan Energy Index >= 1.00 Efficiency Boundaries

    Max Airflow (CFM) 7101
    Max Fan Speed (RPM) 911
    Max Pressure (in. w.g.) 1.520
    Type of Pressure Static

    Note: Operation outside of these boundaries will result in an energy inefficient operation

    		Ps (in. wg) 0 0.125 0.25 0.375 0.5 0.625 0.75 0.875 1 1.25 1.5
    1/4 0.28 470 430 CFM 4315 3887 3323 2387 - - - - - - -
    Sones 6.9 6.8 6.1 4.8 - - - - - - -
    Bhp 0.26 0.28 0.28 0.26 - - - - - - -
    1/3 0.38 520 420 CFM 4774 4392 3939 3288 - - - - - - -
    Sones 8.2 7.9 7.5 6.6 - - - - - - -
    Bhp 0.35 0.38 0.38 0.37 - - - - - - -
    1/2 0.3 480 430 CFM 4407 3989 3456 2606 - - - - - - -
    Sones 7.2 7 6.4 5.2 - - - - - - -
    Bhp 0.27 0.3 0.3 0.28 - - - - - - -
    1/2 0.56 590 480 CFM 5417 5079 4720 4261 3638 2488 - - - - -
    Sones 10.5 9.9 9.5 9 8.4 7.4 - - - - -
    Bhp 0.51 0.54 0.56 0.56 0.54 0.46 - - - - -
    3/4 0.45 550 450 CFM 5050 4688 4282 3722 2929 - - - - - -
    Sones 9.1 8.7 8.3 7.7 6.8 - - - - - -
    Bhp 0.41 0.44 0.45 0.45 0.42 - - - - - -
    3/4 0.86 680 550 CFM 6243 5949 5653 5315 4903 4374 3708 - - - -
    Sones 14 13.3 12.7 12.3 12 11.5 11.4 - - - -
    Bhp 0.78 0.82 0.85 0.86 0.86 0.84 0.8 - - - -
    1 0.59 600 500 CFM 5509 5177 4828 4383 3789 2851 - - - - -
    Sones 10.8 10.2 9.8 9.4 8.8 8 - - - - -
    Bhp 0.53 0.57 0.58 0.59 0.57 0.51 - - - - -
    1 1.11 740 600 CFM 6794 6523 6257 5969 5625 5212 4718 4110 2676 - -
    Sones 16.3 15.4 14.8 14.4 14 13.7 13.3 12.9 12.1 - -
    Bhp 1 1.05 1.09 1.1 1.11 1.1 1.08 1.03 0.82 - -
    1 1/2 1.68 850 680 CFM 7804 7568 7335 7098 6844 6553 6216 5820 5381 4084 -
    Sones 21 19.8 18.9 18.6 18.1 17.5 17.3 17.2 16.2 13.3 -
    Bhp 1.52 1.57 1.62 1.65 1.66 1.68 1.68 1.67 1.64 1.47 -
    2 1.06 730 650 CFM 6702 6428 6158 5861 5507 5077 4568 3920 - - -
    Sones 15.9 15.1 14.5 14 13.7 13.4 13 12.7 - - -
    Bhp 0.96 1.01 1.05 1.05 1.06 1.06 1.03 0.98 - - -
    2 2.06 910 730 CFM 8355 8135 7916 7700 7467 7215 6933 6616 6240 5388 3707
    Sones 24 23 22 21 21 20 19.8 19.8 19.8 17.2 13.8
    Bhp 1.86 1.92 1.97 2.02 2.03 2.05 2.06 2.06 2.05 1.96 1.66
    		1/4 1/3 1/2 1/2 3/4 3/4 1 1 1 1/2 2 2
    		0.28 0.38 0.3 0.56 0.45 0.86 0.59 1.11 1.68 1.06 2.06
    		470 520 480 590 550 680 600 740 850 730 910
    		430 420 430 480 450 550 500 600 680 650 730
    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 CFM Sones Bhp CFM Sones Bhp
    0 4315 6.9 0.26 4774 8.2 0.35 4407 7.2 0.27 5417 10.5 0.51 5050 9.1 0.41 6243 14 0.78 5509 10.8 0.53 6794 16.3 1 7804 21 1.52 6702 15.9 0.96 8355 24 1.86
    0.125 3887 6.8 0.28 4392 7.9 0.38 3989 7 0.3 5079 9.9 0.54 4688 8.7 0.44 5949 13.3 0.82 5177 10.2 0.57 6523 15.4 1.05 7568 19.8 1.57 6428 15.1 1.01 8135 23 1.92
    0.25 3323 6.1 0.28 3939 7.5 0.38 3456 6.4 0.3 4720 9.5 0.56 4282 8.3 0.45 5653 12.7 0.85 4828 9.8 0.58 6257 14.8 1.09 7335 18.9 1.62 6158 14.5 1.05 7916 22 1.97
    0.375 2387 4.8 0.26 3288 6.6 0.37 2606 5.2 0.28 4261 9 0.56 3722 7.7 0.45 5315 12.3 0.86 4383 9.4 0.59 5969 14.4 1.1 7098 18.6 1.65 5861 14 1.05 7700 21 2.02
    0.5 - - - - - - - - - 3638 8.4 0.54 2929 6.8 0.42 4903 12 0.86 3789 8.8 0.57 5625 14 1.11 6844 18.1 1.66 5507 13.7 1.06 7467 21 2.03
    0.625 - - - - - - - - - 2488 7.4 0.46 - - - 4374 11.5 0.84 2851 8 0.51 5212 13.7 1.1 6553 17.5 1.68 5077 13.4 1.06 7215 20 2.05
    0.75 - - - - - - - - - - - - - - - 3708 11.4 0.8 - - - 4718 13.3 1.08 6216 17.3 1.68 4568 13 1.03 6933 19.8 2.06
    0.875 - - - - - - - - - - - - - - - - - - - - - 4110 12.9 1.03 5820 17.2 1.67 3920 12.7 0.98 6616 19.8 2.06
    1 - - - - - - - - - - - - - - - - - - - - - 2676 12.1 0.82 5381 16.2 1.64 - - - 6240 19.8 2.05
    1.25 - - - - - - - - - - - - - - - - - - - - - - - - 4084 13.3 1.47 - - - 5388 17.2 1.96
    1.5 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3707 13.8 1.66
    • ¹û¶³ÊÓƵ 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.
    Documents

    General

    Instruction Manuals

    Videos

    Common methods for tensioning a rooftop exhaust fan belt

    Centering a wheel on a spun aluminum rooftop exhaust fan

    Questions & Answers
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