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    Centrifugal Downblast Exhaust Fan, Product # GB-140-4122XQD, 1085-1595 CFM

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    Centrifugal Downblast Exhaust Fan, Product # GB-140-4122XQD, 1085-1595 CFM

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    Electrical
    115V / 1Ph,
    60Hz

    CFM Range
    1085-1595
    CFM

    Motor
    1/4 HP
    Belt Drive

    • 22 x 22 inch base with prepunched mounting holes for easy attachment to roof curb
    • Variable pitch adjustable motor pulley to optimize fan performance
    • 18.5 x 18.5 inch recommended roof opening

    • Shipping Type:
      Freight
    View other GB-140 products
    $1,281.00
    In stock 
    1 on Hand
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    Electrical
    115V / 1Ph,
    60Hz

    CFM Range
    1085-1595
    CFM

    Motor
    1/4 HP
    Belt Drive

    • 22 x 22 inch base with prepunched mounting holes for easy attachment to roof curb
    • Variable pitch adjustable motor pulley to optimize fan performance
    • 18.5 x 18.5 inch recommended roof opening

    • Shipping Type:
      Freight
    View other GB-140 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

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    California Residents-

    Prop 65 Warning
    Specifications
    Base/Panel Length X Width
    22 x 22 in
    Curb Cap Size
    22 in
    Impeller Diameter
    14 3/4 in
    Roof Opening Width x Roof Opening Length
    18 1/2 x 18 1/2 in
    Base Height
    1 3/4 in
    Base Top to Shroud Top
    23 3/4 in
    Damper Width x Damper Height
    16 x 16 in
    Bearing Size
    3/4 in
    Height
    23 3/4 in
    Weight
    64 lbs
    Overall Diameter
    28 3/8 in
    Dim
    Value
    A
    22 in
    B
    28.375 in
    C
    23.75 in
    Performance
    CFM Range
    1085-1595
    FRPM Range
    673-860
    What do these terms (BHP, CFM, Sones, etc.) mean?
    		Ps (in. wg) 0 0.125 0.25 0.375
    1/4 0.13 860 673 CFM 1595 1457 1304 1085
    Sones 7.2 7.2 6.8 6.2
    Bhp 0.12 0.12 0.13 0.13
    		1/4
    		0.13
    		860
    		673
    Ps (in. wg) CFM Sones Bhp
    0 1595 7.2 0.12
    0.125 1457 7.2 0.12
    0.25 1304 6.8 0.13
    0.375 1085 6.2 0.13
    • 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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