8 Inch x 24 Inch DuraPlus Square Ceiling Support Box

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  • DuraPlus 24 Square Ceiling Support Box 8"
  • DuraPlus 24 Square Ceiling Support Box 8". The size is indicated on the image.
  • DuraPlus 24" Square Ceiling Support Box Sizing Chart
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The Square Ceiling Support Box has a sophisticated black exterior that complements its totally practical design. Stove efficiency is increased by the novel triple wall structure, which keeps things warm while keeping things cool outside. As a result, a fire-safe framework shields the building and chimney from damage. The triple-wall chimney is insulated in two layers. Security is provided via an air gap and a ceramic blanket.

Product Features:

  • Trim included
  • Triple-wall chimney
  • Starter Section built-in
  • 2" clearance to combustibles
  • Clean, smooth exterior finish
  • Use when air-cooled chimney is required
  • Outer diameter is 4" larger than inner diameter
  • Use with flat, vaulted, or cathedral ceilings
  • The Square Ceiling Support Box is painted black
  • Supports up to 35’ of DuraPlus Chimney
  • For adapters, see DVL and DuraBlack section
  • Refer to the Ceiling Pitch table to determine the size of the support box needed
  • Free-floating inner 430-alloy liner maintains structural integrity in chimney fires
  • For uses with wood stoves, fireplaces, furnaces, boilers, stoves, ranges, water heaters, or other appliances fueled by wood, oil, coal, or gas

Product Specifications:

 Size:  8" Inner Diameter
 Length:  18-1/4"
 Height:  24-Inch
 Width:  14-1/4"
 DuraBlack Ceiling Pitch:  5/12-9/12
 DVL with Ceiling Pitch:  7/12-19/12
 Inner Pipe Gauge:  27
 Outer Pipe Gauge:  28
 Pipe Class:       Class A
 Vent Construction:  Triple Wall
 Weight:  14.5 lbs.
 Material:  Galvanized
Use:  Ducting and Venting
Style:  Repair & Replacement
 Fuel Type:  Coal, Gas, Oil, Wood
 UL Listing Number:
 UL 103 HT
 Product Type:   Ceiling Support Box

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Warranty Information

DuraVent, Inc. (“DuraVent”) provides this limited lifetime warranty for all of its products with the exception of Ventinox® (lifetime), and PolyPro® (ten years). Subject to the limitations set forth below, DuraVent warrants that its products will be free from defects in material or manufacturing, if properly installed, maintained and used.

DuraVent products are fully warranted if installed only by a professional installer. This Warranty is transferable from the original homeowner to the buyer of the home.

This warranty does not cover normal wear and tear, smoke damage or damage caused by chimney fires, acts of God, or any product that was:

(1) purchased other than from an authorized DuraVent dealer, retailer or distributor;

(2) modified or altered;

(3) improperly serviced, inspected or cleaned; or (4) subject to negligence or any use not in accordance with the installation instructions included with the product as determined by DuraVent.

This limited lifetime warranty applies only to parts manufactured by DuraVent.

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