DuraVent DuraPlus 7" Inner Diameter Square Ceiling Support Box
DuraPlus is designed to stay cool on the outside, to provide a hot draft on the inside, to boost stove efficiency, and provide a fire-safe design that protects both the chimney and the building. This triple-wall chimney features two insulating layers (refractory blanket, plus air space). The refractory 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
Designed for normal, continuous operation at 1000° F flue gas temperatures, DuraPlus is subjected to rigorous and stringent HT requirements of the UL standard, including one hour at 1400° F, plus three ten-minute chimney fire tests at 2100° F.
- Use with flat, vaulted, or cathedral ceilings.
- The Square Ceiling Support Box is painted black.
- Starter Section built-in.
- Supports up to 35’ of DuraPlus Chimney.
- For adapters, see DVL and DuraBlack section.
- Trim included.
- Refer to the Ceiling Pitch table to determine the size of the support box needed.
Materials and Construction
- .016” 430 stainless steel outer wall
- .016” 430 stainless steel inner liner.
- .018” galvanized steel outer wall.
- .018” aluminized steel intermediate liner.
- Insulated layers plus ventilated air space.
- Locks tightly with a precision twist-lock connection.
|Diameter||7" (inner)||7" (inner)
|Dimension||11" (A) x 18.25" (W)||24" (A) x 18.25" (W)||36" (A) x 18.25" (W)|
|Clearances||2" clearance to combustible.|
|Listings||UL Listed to UL 103HT (MH7399).|
Ceiling Pitch Table
- Download Product Brochure
- Download Product Catalog
- Download Installation Manual
- Download Installation Guide
- Download Typical Installation
About the manufacturer:
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.
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