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Winter weather and extreme cold are causing shipping delays for small parcel and LTL carriers in certain parts of the country, including expedited shipments. Please expect extended lead times.

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Shipping Cutoff Times
Shipping Type Order By
Standard Ground Small Parcel
FREE - On orders over $25 View Transit Map 		7:00 PM CST
Next Day Air
(Calculated at checkout) 		3:00 PM CST
Standard Ground Freight
FREE - On orders over $25 		1:00 PM CST
  • Shipping cutoff times apply to in-stock items. Please note item lead-times when placing your order.
  • Orders placed on weekends or holidays will be processed the next business day.
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    • Product # WD-320

    Vertical mount backdraft damper, Flange on Discharge, Model WD-320

    Greenheck Product # WD-320
    Model WD is a backdraft damper used in ventilation systems, allowing airflow in one direction and preventing airflow in the opposite direction.Rated for duct velocities up to 2,500 ft/min.Horizontal and vertical mounting options.

    Product Variants

    Showing 12 of 12
    SKU DAMPER WIDTH x DAMPER HEIGHT MAX VELOCITY PRESSURE DIFFERENTIAL MAX MOUNTING POSITION PRICE LEAD TIME
    WD320-10X10
    Model: WD
    Model / Size: WD-320
    		10 x 10 in 2500 2 Vertical $147.00
    In stock 
    8 on Hand

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    WD320-12X12
    Model: WD
    Model / Size: WD-320
    		12 x 12 in 2500 2 Vertical $147.00
    In stock 
    7 on Hand

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    WD320-14X14
    Model: WD
    Model / Size: WD-320
    		14 x 14 in 2500 2 Vertical $174.00
    In stock 
    23 on Hand

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    WD320-16X16
    Model: WD
    Model / Size: WD-320
    		16 x 16 in 2500 2 Vertical $174.00
    In stock 
    22 on Hand

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    WD320-18X18
    Model: WD
    Model / Size: WD-320
    		18 x 18 in 2500 2 Vertical $215.00
    In stock 
    8 on Hand

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    WD320-20X20
    Model: WD
    Model / Size: WD-320
    		20 x 20 in 2500 2 Vertical $215.00
    In stock 
    14 on Hand

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    WD320-22X22
    Model: WD
    Model / Size: WD-320
    		22 x 22 in 2500 2 Vertical $261.00
    In stock 
    152 on Hand

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    WD320-26X26
    Model: WD
    Model / Size: WD-320
    		26 x 26 in 2500 2 Vertical $280.00
    In stock 
    113 on Hand

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    WD320-32X32
    Model: WD
    Model / Size: WD-320
    		32 x 32 in 2500 2 Vertical $358.00
    In stock 
    59 on Hand

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    WD320-38X38
    Model: WD
    Model / Size: WD-320
    		38 x 38 in 2500 2 Vertical $495.00
    In stock 
    96 on Hand

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    WD320-44X44
    Model: WD
    Model / Size: WD-320
    		44 x 44 in 2500 2 Vertical -
    Obsolete 
    WD320-50x50
    Model: WD
    Model / Size: WD-320
    		44 x 44 in 2500 2 Vertical $819.00
    In stock 
    62 on Hand

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