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    Centrifugal Downblast Exhaust Fan, Product # GB-160-LMD122XQD

    Centrifugal Downblast Exhaust Fan, Product # GB-160-LMD122XQD

    • 22 x 22 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
    • 18.5 x 18.5 inch recommended roof opening
    • Shipping Type:
      Freight
    $777.45
    In stock 
    2 on Hand
    Free shipping
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    • 22 x 22 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
    • 18.5 x 18.5 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
    22 x 22 in
    Curb Cap Size
    22 in
    Impeller Diameter
    17 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
    52 lbs
    Overall Diameter
    28 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
    970-4667
    FRPM Range
    480-1580
    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
    1/4 0.08 580 480 CFM 1713 1417 970 - - - - - - - - -
    Sones 5.8 5.6 5.3 - - - - - - - - -
    Bhp 0.071 0.078 0.072 - - - - - - - - -
    1/4 0.15 720 580 CFM 2127 1893 1632 1243 - - - - - - - -
    Sones 7.8 7.5 7.2 6.8 - - - - - - - -
    Bhp 0.14 0.15 0.15 0.14 - - - - - - - -
    1/4 0.28 890 720 CFM 2629 2439 2248 2031 1757 1355 - - - - - -
    Sones 11.3 10.8 10.4 10 9.3 8.7 - - - - - -
    Bhp 0.26 0.27 0.28 0.28 0.28 0.25 - - - - - -
    1/3 0.1 640 570 CFM 1890 1626 1292 - - - - - - - - -
    Sones 6.6 6.4 6.1 - - - - - - - - -
    Bhp 0.095 0.1 0.1 - - - - - - - - -
    1/3 0.2 790 640 CFM 2334 2121 1894 1611 - - - - - - - -
    Sones 9.1 8.7 8.4 7.9 - - - - - - - -
    Bhp 0.018 0.19 0.2 0.19 - - - - - - - -
    1/3 0.38 980 790 CFM 2895 2722 2551 2365 2157 1887 1518 - - - - -
    Sones 13.5 12.8 12.3 12 11.4 10.7 10 - - - - -
    Bhp 0.34 0.36 0.37 0.38 0.38 0.37 0.34 - - - - -
    1/2 0.29 900 720 CFM 2658 2471 2282 2069 1803 1421 - - - - - -
    Sones 11.6 11 10.6 10.2 9.6 8.9 - - - - - -
    Bhp 0.27 0.28 0.29 0.29 0.29 0.27 - - - - - -
    1/2 0.56 1120 900 CFM 3308 3157 3008 2855 2688 2508 2290 2013 - - - -
    Sones 15.7 15.2 14.6 14.2 13.9 13.4 12.8 12.5 - - - -
    Bhp 0.51 0.53 0.54 0.56 0.56 0.56 0.56 0.53 - - - -
    3/4 0.44 1030 840 CFM 3042 2878 2716 2546 2354 2126 1824 - - - - -
    Sones 14.3 13.6 13.1 12.7 12.3 11.7 11.1 - - - - -
    Bhp 0.4 0.41 0.43 0.44 0.44 0.43 0.41 - - - - -
    3/4 0.84 1280 1030 CFM 3781 3648 3517 3387 3251 3107 2953 2788 2584 2058 - -
    Sones 18.6 18.1 17.6 17.1 16.8 16.5 16.1 15.7 15.5 14.1 - -
    Bhp 0.76 0.78 0.8 0.82 0.83 0.84 0.84 0.84 0.83 0.77 - -
    1 0.58 1130 940 CFM 3338 3188 3040 2889 2725 2547 2336 2069 1742 - - -
    Sones 15.9 15.3 14.8 14.4 14 13.6 13 12.7 11.7 - - -
    Bhp 0.53 0.54 0.56 0.57 0.58 0.58 0.57 0.55 0.52 - - -
    1 1.13 1410 1130 CFM 4165 4045 3924 3807 3687 3564 3432 3292 3146 2790 2306 -
    Sones 21 21 20 19.9 19.5 19.2 18.9 18.5 18.2 17.7 16.6 -
    Bhp 1.02 1.04 1.06 1.08 1.1 1.11 1.12 1.13 1.13 1.1 1.03 -
    1 1/2 0.82 1270 1150 CFM 3751 3618 3485 3355 3218 3070 2915 2748 2537 1991 - -
    Sones 18.5 17.9 17.4 16.9 16.6 16.3 15.9 15.5 15.3 13.7 - -
    Bhp 0.75 0.76 0.78 0.8 0.81 0.82 0.82 0.82 0.81 0.74 - -
    1 1/2 1.58 1580 1270 CFM 4667 4560 4452 4346 4241 4134 4024 3912 3787 3531 3221 2825
    Sones 25 25 24 24 24 23 23 23 22 22 21 21
    Bhp 1.44 1.46 1.48 1.5 1.53 1.55 1.56 1.57 1.58 1.58 1.56 1.5
    1/4 1/4 1/4 1/3 1/3 1/3 1/2 1/2 3/4 3/4 1 1 1 1/2 1 1/2
    0.08 0.15 0.28 0.1 0.2 0.38 0.29 0.56 0.44 0.84 0.58 1.13 0.82 1.58
    580 720 890 640 790 980 900 1120 1030 1280 1130 1410 1270 1580
    480 580 720 570 640 790 720 900 840 1030 940 1130 1150 1270
    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 1713 5.8 0.071 2127 7.8 0.14 2629 11.3 0.26 1890 6.6 0.095 2334 9.1 0.018 2895 13.5 0.34 2658 11.6 0.27 3308 15.7 0.51 3042 14.3 0.4 3781 18.6 0.76 3338 15.9 0.53 4165 21 1.02 3751 18.5 0.75 4667 25 1.44
    0.125 1417 5.6 0.078 1893 7.5 0.15 2439 10.8 0.27 1626 6.4 0.1 2121 8.7 0.19 2722 12.8 0.36 2471 11 0.28 3157 15.2 0.53 2878 13.6 0.41 3648 18.1 0.78 3188 15.3 0.54 4045 21 1.04 3618 17.9 0.76 4560 25 1.46
    0.25 970 5.3 0.072 1632 7.2 0.15 2248 10.4 0.28 1292 6.1 0.1 1894 8.4 0.2 2551 12.3 0.37 2282 10.6 0.29 3008 14.6 0.54 2716 13.1 0.43 3517 17.6 0.8 3040 14.8 0.56 3924 20 1.06 3485 17.4 0.78 4452 24 1.48
    0.375 - - - 1243 6.8 0.14 2031 10 0.28 - - - 1611 7.9 0.19 2365 12 0.38 2069 10.2 0.29 2855 14.2 0.56 2546 12.7 0.44 3387 17.1 0.82 2889 14.4 0.57 3807 19.9 1.08 3355 16.9 0.8 4346 24 1.5
    0.5 - - - - - - 1757 9.3 0.28 - - - - - - 2157 11.4 0.38 1803 9.6 0.29 2688 13.9 0.56 2354 12.3 0.44 3251 16.8 0.83 2725 14 0.58 3687 19.5 1.1 3218 16.6 0.81 4241 24 1.53
    0.625 - - - - - - 1355 8.7 0.25 - - - - - - 1887 10.7 0.37 1421 8.9 0.27 2508 13.4 0.56 2126 11.7 0.43 3107 16.5 0.84 2547 13.6 0.58 3564 19.2 1.11 3070 16.3 0.82 4134 23 1.55
    0.75 - - - - - - - - - - - - - - - 1518 10 0.34 - - - 2290 12.8 0.56 1824 11.1 0.41 2953 16.1 0.84 2336 13 0.57 3432 18.9 1.12 2915 15.9 0.82 4024 23 1.56
    0.875 - - - - - - - - - - - - - - - - - - - - - 2013 12.5 0.53 - - - 2788 15.7 0.84 2069 12.7 0.55 3292 18.5 1.13 2748 15.5 0.82 3912 23 1.57
    1 - - - - - - - - - - - - - - - - - - - - - - - - - - - 2584 15.5 0.83 1742 11.7 0.52 3146 18.2 1.13 2537 15.3 0.81 3787 22 1.58
    1.25 - - - - - - - - - - - - - - - - - - - - - - - - - - - 2058 14.1 0.77 - - - 2790 17.7 1.1 1991 13.7 0.74 3531 22 1.58
    1.5 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2306 16.6 1.03 - - - 3221 21 1.56
    1.75 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2825 21 1.5
    • 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.
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