Centrifugal Downblast Exhaust Fan, Product # GB-300-5140X3QD-DR1

    Greenheck Product # GB-300-5140X3QD-DR1
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    PRODUCT ALERT : New Product SKU
    Product # GB-300-5X-3-QD-DR1 has been replaced with GB-300-5140X3QD-DR1. The product change is in name only. Form, fit and function remain the same.

    • 40 x 40 inch base with prepunched mounting holes for easy attachment to roof curb
    • Variable pitch adjustable motor pulley to optimize fan performance
    • 32.5 x 32.5 inch recommended roof opening


    • AMCA Sound & Air
    • High Wind and Hurricane
    • Seismic
    • UL/cUL 705
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    Product Description

    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
    • Motor, belt and pulleys shipped loose for field assembly
    California Residents - Prop 65 Warning