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    Centrifugal Downblast Exhaust Fan, Product # GB-300-LMD140XQD, 2630-14416 CFM

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    Centrifugal Downblast Exhaust Fan, Product # GB-300-LMD140XQD, 2630-14416 CFM

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    CFM Range
    2630-14416
    CFM

    Mounting Location
    Roof

    Drive Package
    No drive package included

    • 40 x 40 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
    • 36.5 x 36.5 inch recommended roof opening

    • Shipping Type:
      Freight
    View other GB-300 products
    $2,567.53
    In stock 
    3 on Hand
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    CFM Range
    2630-14416
    CFM

    Mounting Location
    Roof

    Drive Package
    No drive package included

    • 40 x 40 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
    • 36.5 x 36.5 inch recommended roof opening

    • Shipping Type:
      Freight
    View other GB-300 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-240
    2. ACME PV-260
    3. ACME PV-300
    4. ACME PV-300
    5. Carnes VEBK-24
    6. Loren Cook ACEB-245
    7. Loren Cook ACEB-270
    8. Loren Cook ACEB-270
    9. Loren Cook ACEB-300
    10. Soler & Palau SDB-24
    11. Soler & Palau SDB-24
    12. Soler & Palau SDB-27
    13. Soler & Palau SDB-27
    14. Twin City Fan BCRD-300D
    15. Twin City Fan BCRD-300DHP

    California Residents-

    Prop 65 Warning
    California Title 20
    Specifications
    Base/Panel Length X Width
    40 x 40 in
    Curb Cap Size
    40 in
    Impeller Diameter
    30 3/4 in
    Roof Opening Width x Roof Opening Length
    36 1/2 x 36 1/2 in
    Base Height
    1 3/4 in
    Base Top to Shroud Top
    36 in
    Damper Width x Damper Height
    34 x 34 in
    Bearing Size
    1 in
    Height
    36 in
    Weight
    248 lbs
    Overall Diameter
    50 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
    2630-14416
    FRPM Range
    300-890
    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) 1119
    Max Fan Speed (RPM) 891
    Max Pressure (in. w.g.) 2.180
    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 1.75 2
    1/3 0.36 370 300 CFM 5993 5314 4455 2630 - - - - - - - - -
    Sones 9.2 6.4 5.9 5.4 - - - - - - - - -
    Bhp 0.34 0.36 0.36 0.29 - - - - - - - - -
    1/2 0.31 350 310 CFM 5669 4943 3974 - - - - - - - - - -
    Sones 9.2 6 5.6 - - - - - - - - - -
    Bhp 0.29 0.31 0.3 - - - - - - - - - -
    1/2 0.57 430 350 CFM 6965 6401 5738 4902 3232 - - - - - - - -
    Sones 10 8.6 7.6 6.9 6.5 - - - - - - - -
    Bhp 0.53 0.56 0.57 0.56 0.47 - - - - - - - -
    3/4 0.26 330 300 CFM 5345 4567 3445 - - - - - - - - - -
    Sones 9.1 5.7 5.3 - - - - - - - - - -
    Bhp 0.24 0.26 0.25 - - - - - - - - - -
    3/4 0.46 400 330 CFM 6479 5862 5130 4059 - - - - - - - - -
    Sones 9.3 7.2 6.5 6.1 - - - - - - - - -
    Bhp 0.43 0.45 0.46 0.43 - - - - - - - - -
    3/4 0.85 490 400 CFM 7937 7461 6898 6285 5490 4130 - - - - - - -
    Sones 12.2 11.6 10.6 9.9 8.8 8.8 - - - - - - -
    Bhp 0.79 0.82 0.84 0.85 0.83 0.74 - - - - - - -
    1 0.61 440 370 CFM 7127 6579 5937 5151 3768 - - - - - - - -
    Sones 10.4 9 8 7.3 6.9 - - - - - - - -
    Bhp 0.57 0.6 0.61 0.6 0.54 - - - - - - - -
    1 1.13 540 440 CFM 8747 8320 7824 7294 6684 5933 4663 - - - - - -
    Sones 14 13.5 12.8 12.2 11.4 10.3 10 - - - - - -
    Bhp 1.06 1.09 1.12 1.13 1.13 1.1 1 - - - - - -
    1 1/2 1.63 610 490 CFM 9881 9503 9086 8633 8152 7615 6981 6158 4704 - - - -
    Sones 16.5 16 15.5 14.9 14.5 13.8 12.8 11.8 10.4 - - - -
    Bhp 1.52 1.56 1.6 1.62 1.63 1.63 1.6 1.54 1.37 - - - -
    2 2.16 670 540 CFM 10853 10508 10148 9739 9323 8874 8382 7819 7159 - - - -
    Sones 19.1 18.6 18.1 17.7 17.3 16.8 16.1 15.2 14.1 - - - -
    Bhp 2.02 2.06 2.11 2.14 2.15 2.16 2.16 2.13 2.08 - - - -
    3 1.72 620 530 CFM 10043 9671 9264 8819 8352 7840 7232 6516 5233 - - - -
    Sones 16.9 16.4 15.9 15.4 15 14.3 13.4 12.4 11 - - - -
    Bhp 1.6 1.64 1.68 1.7 1.71 1.72 1.69 1.64 1.5 - - - -
    3 3.29 770 620 CFM 12473 12173 11873 11535 11180 10817 10440 10039 9596 8556 6864 - -
    Sones 23 23 22 22 21 21 21 19.9 19.3 17.7 15.4 - -
    Bhp 3.06 3.11 3.17 3.21 3.25 3.27 3.28 3.29 3.28 3.2 2.93 - -
    5 2.69 720 630 CFM 11663 11342 11022 10643 10259 9868 9439 8970 8447 6984 - - -
    Sones 21 21 20 19.7 19.4 19 18.5 17.8 16.9 14.5 - - -
    Bhp 2.5 2.55 2.6 2.64 2.67 2.68 2.69 2.68 2.65 2.49 - - -
    5 5.09 890 720 CFM 14416 14157 13898 13639 13335 13028 12716 12402 12073 11379 10536 9568 7963
    Sones 28 28 28 28 27 26 26 26 25 24 23 22 20
    Bhp 4.73 4.79 4.85 4.91 4.96 5.01 5.03 5.05 5.06 5.09 5.02 4.89 4.54
    		1/3 1/2 1/2 3/4 3/4 3/4 1 1 1 1/2 2 3 3 5 5
    		0.36 0.31 0.57 0.26 0.46 0.85 0.61 1.13 1.63 2.16 1.72 3.29 2.69 5.09
    		370 350 430 330 400 490 440 540 610 670 620 770 720 890
    		300 310 350 300 330 400 370 440 490 540 530 620 630 720
    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 CFM Sones Bhp CFM Sones Bhp CFM Sones Bhp
    0 5993 9.2 0.34 5669 9.2 0.29 6965 10 0.53 5345 9.1 0.24 6479 9.3 0.43 7937 12.2 0.79 7127 10.4 0.57 8747 14 1.06 9881 16.5 1.52 10853 19.1 2.02 10043 16.9 1.6 12473 23 3.06 11663 21 2.5 14416 28 4.73
    0.125 5314 6.4 0.36 4943 6 0.31 6401 8.6 0.56 4567 5.7 0.26 5862 7.2 0.45 7461 11.6 0.82 6579 9 0.6 8320 13.5 1.09 9503 16 1.56 10508 18.6 2.06 9671 16.4 1.64 12173 23 3.11 11342 21 2.55 14157 28 4.79
    0.25 4455 5.9 0.36 3974 5.6 0.3 5738 7.6 0.57 3445 5.3 0.25 5130 6.5 0.46 6898 10.6 0.84 5937 8 0.61 7824 12.8 1.12 9086 15.5 1.6 10148 18.1 2.11 9264 15.9 1.68 11873 22 3.17 11022 20 2.6 13898 28 4.85
    0.375 2630 5.4 0.29 - - - 4902 6.9 0.56 - - - 4059 6.1 0.43 6285 9.9 0.85 5151 7.3 0.6 7294 12.2 1.13 8633 14.9 1.62 9739 17.7 2.14 8819 15.4 1.7 11535 22 3.21 10643 19.7 2.64 13639 28 4.91
    0.5 - - - - - - 3232 6.5 0.47 - - - - - - 5490 8.8 0.83 3768 6.9 0.54 6684 11.4 1.13 8152 14.5 1.63 9323 17.3 2.15 8352 15 1.71 11180 21 3.25 10259 19.4 2.67 13335 27 4.96
    0.625 - - - - - - - - - - - - - - - 4130 8.8 0.74 - - - 5933 10.3 1.1 7615 13.8 1.63 8874 16.8 2.16 7840 14.3 1.72 10817 21 3.27 9868 19 2.68 13028 26 5.01
    0.75 - - - - - - - - - - - - - - - - - - - - - 4663 10 1 6981 12.8 1.6 8382 16.1 2.16 7232 13.4 1.69 10440 21 3.28 9439 18.5 2.69 12716 26 5.03
    0.875 - - - - - - - - - - - - - - - - - - - - - - - - 6158 11.8 1.54 7819 15.2 2.13 6516 12.4 1.64 10039 19.9 3.29 8970 17.8 2.68 12402 26 5.05
    1 - - - - - - - - - - - - - - - - - - - - - - - - 4704 10.4 1.37 7159 14.1 2.08 5233 11 1.5 9596 19.3 3.28 8447 16.9 2.65 12073 25 5.06
    1.25 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 8556 17.7 3.2 6984 14.5 2.49 11379 24 5.09
    1.5 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6864 15.4 2.93 - - - 10536 23 5.02
    1.75 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 9568 22 4.89
    2 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 7963 20 4.54
    • 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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