Skip to content
Blog Contact Us About Us Shipping Policy Refund And Returns Policy Privacy Policy Terms Of Service Financing
DuraVent DuraPlus 7" Inner Diameter Square Ceiling Support Box

DuraVent DuraPlus 7" Inner Diameter Square Ceiling Support Box

by DuraVent
Save $83.95
$419.77

$335.82
SKU 7DP-CS11
Size
Supported payment methods
  • American Express
  • Diners Club
  • Discover
  • JCB
  • Mastercard
  • Visa

Notify me when back in stock

Fast and FREE Shipping

Fast and FREE Shipping

You Save $299

No Sales Taxes

No Sales Taxes

State Exclusions Apply

We Will Work With You On Pricing! Call Or Chat With Us Today!

We Will Work With You On Pricing! Call Or Chat With Us Today!


Overview

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.

Features

  • 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.

 

Specifications

Model 7DP-CS11 7DP-CS24 7DP-CS36
Diameter 7" (inner) 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).
Warranty Limited-lifetime warranty
Ceiling Pitch Table
DuraBlack DVL USE
0/12-4/12 0/12-6/12 11" Support Box
5/12-9/12 7/12-13/12 24" Support Box
10/12-14/12 14/12-20/12 36" Support Box

 

Downloads

 

California PROP 65: This product can expose you to Lead & Chromium, which is known to the State of California to cause cancer and birth defects, or other reproductive harm. See WARNING


Overview

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.

Features

  • 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.

 

Specifications

Model 7DP-CS11 7DP-CS24 7DP-CS36
Diameter 7" (inner) 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).
Warranty Limited-lifetime warranty
Ceiling Pitch Table
DuraBlack DVL USE
0/12-4/12 0/12-6/12 11" Support Box
5/12-9/12 7/12-13/12 24" Support Box
10/12-14/12 14/12-20/12 36" Support Box

 

Downloads

 

California PROP 65: This product can expose you to Lead & Chromium, which is known to the State of California to cause cancer and birth defects, or other reproductive harm. See WARNING