DuraVent 9438A 6" x 11" Class A Chimney Pipe Square Ceiling Support Box

- Item #: BCI1760813

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DuraTech Collection 6" x 11" Class A Chimney Pipe Square Ceiling Support Box

Warranty Notice: M&G DuraVent warranty applies to this professional grade product only when installed by a trained professional installer.

The DuraTech 6" x 11" Class A Chimney Pipe Square Ceiling Support Box is used to support chimney pipe and provides a positive connection between support box and chimney with a built-in twist lock. Suitable for both flat and cathedral (A-Frame) ceiling applications. Also is used in short attic spaces (see instructions). Fits between standard 16” on-center joists and most manufactured home applications. Supports up to 60' of DuraTech Chimney. Use adapter to attach DVL or DuraBlack to the support box. A 2” wide trim collar is included. Painted black.


  • Inner Diameter: 6"
  • Height: 11"
  • Outer Diameter: 9"
  • Dimensions: 12" x 12"
  • Supports Up To 60' of DuraTech Chimney
  • UL Listed

With a Thermal Tech blanket insulation encased between dual walls, DuraTech offers the optimum in safety and performance. It keeps the outer wall of the chimney cool, while ensuring high flue gas temperatures for optimum draft performance. 5”-8” DuraTech is a double-wall, all-fuel chimney system for use withwood stoves, fireplaces, furnaces, boilers, ranges, water heaters, or other appliances fueled by wood, oil, coal, or gas, and zero-clearance fireplaces thatare factory-built.

Looking for Simpson Dura-Vent? You found it! Simpson Dura-Vent has changed their name to DuraVent. DuraVent is a recognized technological leader in the venting industry. Consistently the first to market with new innovations in venting systems, DuraVent has captured a leadership position in emerging markets. DuraVent has patents for several products and continues to design safe and technologically advanced venting. The company's research into solving problems with corrosion, when biofuels such as corn are used, led to the break-through patent for PelletVent Pro. Scientifically proven materials and unequalled engineering make DuraVent products not only the best choice, or safest choice, but the only choice for professional quality venting products.

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Our SKU: DuraVent 9438A

This product is listed under the following manufacturer number(s):

*Denotes a finish or option that has been discontinued

DuraVent 9438A Product Specifications

Specification Sheet
Configuration Support Box
Fuel Type Coal, Gas, Oil, Wood, Wood/Oil/Coal
Height 11
Length 12
Pipe Class Class A
Pipe Inside Diameter 6
Pipe Shape Round
Product Weight 8.5
UL Listed Yes
Vent Construction Double Wall
Vent Pipe Size 6
Width 12

Installation Resource Center

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  • Does this box come with a double wall adapter?

    A. The Simpson Dura-Vent 9438A is just the box by itself, any other connections will need to be purchased separately.

  • Is this the correct part for a mobile home {Oregon]

    A. The Simpson Dura-Vent 9438A can be installed in a mobile home.

  • Is this the correct part for a mobile home [Oregon]

    A. The Simpson Dura-Vent 9438A can be installed in a mobile home.


    A. The Simpson Dura-Vent 9438A is a Square Ceiling Support Box that is 11" in height. The Simpson Dura-Vent 9436B is a Reduced Clearance Square Ceiling Support Box that is 24" in height.

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