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DuraVent 9048BN 6" x 24" Class A Chimney Pipe Square Ceiling Support Box

Item #: BCI1762856
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Product Details for the DuraVent 9048BN

DuraPlus Collection 6" x 24" Class A Chimney Pipe Square Ceiling Support Box

The DuraPlus 6" x 24" Class A Chimney Pipe Square Ceiling Support Box is used with flat, vaulted, or cathedral ceilings. Square Ceiling Support Box is painted black. Refer to Ceiling Pitch table to determine size of support box needed. Supports up to 35’ of DuraPlus Chimney. Starter Section built in. Trim included.


  • Length: 18-1/4"
  • Width: 14-1/4"
  • Height: 24"
  • Inner Diameter: 6"
  • For DuraBlack Ceiling Pitch 5/12-9/12 Use This Support Box
  • For DVL Pipe with Ceiling Pitch of 7/12-19/12 Use This Support Box

DuraPlus is designed to stay cool on the outside, to provide a hot draft on the inside, to boost stove efficiency, and to provide for a fire-safe design that protects both the chimney and the building. This triple-wall chimney features two insulating layers (ceramic blanket, plus air space). The ceramic blanket insulation is held securely in position, eliminating hot spots common with loose-fill type insulations. In the event of a creosote fire, the compressible blanket insulation permits the chimney liner to expand outwardly in a radial direction. DuraPlus Chimney is a triple-wall, all-fuel chimney for use with wood stoves, fireplaces, furnaces, boilers, stoves, ranges, water heaters, or other appliances fueled by wood, oil, coal, or gas.

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.

Our SKU: DuraVent 9048BN

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

*Denotes a finish or option that has been discontinued

4 Questions from the Community
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I have a 7/12 pitched roof (no attic) and am trying to run the Class A triple wall pipe up through the roof. Which box would I use? And... the salesman told me that the pipe slips right through the box, but the ad says that it "supports 35 feet of pipe". How does it support the pipe if it just passes through? Is that just lateral support?

You will need a ceiling support box, a DVL adapter to transition from stove pipe to the chimney pipe and then on the exterior you will need the cap, storm collar and a roof flashing. Please feel free to email me back directly and I would be happy to build you a quote to your installation specifications.

I have a 9021SS Will it fit in a 9048BN

Yes, they will fit together.

What is the outside dimension of the bax. Is it 12 x 12 or 11 x 11 . One has to know this to design a wood frame to hang from ceiling, especially if 10/12 pitch

The Simpson Dura-Vent 9048BN box measures 18.25" x 18.25".

Does this box include the pipe?

The Duravent 9048BN does not include the pipe that runs through the ceiling support box.

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6" x 11" Class A Chimney Pipe Square Ceiling Support Box
DuraVent 9048DN
6" x 36" Class A Chimney Pipe Square Ceiling Support Box
DuraVent 9148BN
7" x 24" Class A Chimney Pipe Square Ceiling Support Box

DuraVent 9048BN Technical Specs

Configuration Support Box
Fuel Type Coal, Gas, Oil, Wood, Wood/Oil/Coal
Height 24
Length 18.25
Pipe Class Class A
Pipe Inside Diameter 6
Pipe Shape Round
Product Weight 14
UL Listed Yes
Vent Construction Triple Wall
Vent Pipe Size 6
Width 14.25

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