McMaster-Carr logo
    Filter by
    Duct Size
    Diffuser Shape
    Material
    Mounting Location
    Shape
    Overall Diameter
    DFARS Specialty Metals
    Color
    Width
    ID
    Attribute Image
    U.S.–Mexico–Canada Agreement (USMCA) Qualifying
    Fitting Connection
    Export Control Classification Number (ECCN)
    Industrial Info Snippet
    Diameter
    Attribute Image
    Length
    Duct Profile
    Duct Type
    Gauge
    End Construction
    Forward
    Enter e-mail addresses in the fields below
    Message
    Cancel
    Print
    How can we improve?
    Comments
    E-mail address (if you would like a response)
    5 Products

    Ready-to-Connect Ceiling Diffusers

    Image of Product. Front orientation. Diffusers. Ready-to-Connect Ceiling Diffusers, Round Diffuser.
    Image of Product. Front orientation. Diffusers. Ready-to-Connect Ceiling Diffusers, Square Diffuser.

    Round Diffuser

    Square Diffuser

    Diffusers come with a collar and damper already in place for simple installation. They evenly disperse airflow into a room to maintain a consistent temperature throughout the space. Collar is adjustable to fit a range of duct sizes.
    Made of plastic, these diffusers are impact, abrasion, and chemical resistant.
    Overall
    For Duct
    Size
    Dia.
    Lg.
    Wd.
    Diffuser
    Shape
    Material
    Color
    Mounting Fasteners
    Included
    Each
    6, 7, 8—11 1/4"11 1/4"SquarePlasticWhiteYes2559K5000000
    6, 7, 812 1/8"——RoundPlasticWhiteYes2559K900000
     

    Standard Duct and Fittings

    Image of System. Front orientation. Exploded view. Duct and Fittings. Standard Duct and Fittings.
    Deliver air for a range of HVAC applications, including exhaust and dust collection. Our basic duct, the round shape creates smoother, more efficient airflow than rectangular and oval duct. The male end is slightly smaller than the female, so sections join without clamps or tools.
    Vent Caps
    Image of Product. Front orientation. Duct and Fittings. Standard Duct and Fittings, Vent Caps, Exhaust Vent.
    Image of Product. Front orientation. Duct and Fittings. Standard Duct and Fittings, Vent Caps, Intake Vent.

    Exhaust Vent

    Intake Vent

    Cover vents with caps that let air in or out.
    Exhaust Vent—A built-in damper allows air to escape while blocking backdrafts, rain, and snow.
    Intake Vent—Only fresh air enters though the screen—no debris or pests allowed.
    Galvanized Steel—Corrosion resistant and affordable, galvanized steel is the most commonly used ductwork material.
    Galvanized Steel
    Duct
    Size
    ID
    OD
    Ga.
    Features
    Includes
    Each
    Exhaust Vent
    77"—30—Backdraft Damper1766K486000000
     
    Intake Vent
    7—6 7/8"30Bird Screen—1766K48300000
     
    Rain Caps
    Image of Product. Front orientation. Duct and Fittings. Standard Duct and Fittings, Rain Caps.
    Top off vertical duct and exhaust stacks to prevent corrosion and blockages that can disrupt airflow.
    Galvanized Steel—Corrosion resistant and affordable, galvanized steel is the most commonly used ductwork material.
    Galvanized Steel
    Duct
    Size
    ID
    Ga.
    Each
    77"261766K75000000
     
    back to top