Description
This DuraTech Cathedral Support Box is designed to provide a positive connection between the support box and DuraTech chimney pipe with a built-in twist-lock feature. This support box is compatible with both flat, and cathedral style ceilings, as well as short attic spaces (see instructions). The Cathedral Support Box is painted black, includes a 2" wide trim collar, and supports up to 60’ of DuraTech chimney pipe.
DuraTech Square Ceiling Support Box (
PDF, 205KB )
DuraTech Additional Info:
Featuring thermal blanket insulation between dual walls, DuraTech delivers top-tier safety and performance. It maintains a cool outer chimney wall while ensuring high flue gas temperatures for optimal draft. The inner wall is 25% thicker than those in competing chimneys, providing an extra layer of safety. With no need for locking bands or mechanical fasteners, DuraTech’s sleek 1" wall design allows for easy installation through 16" on-center framing. For tight spaces, a Reduced Clearance Square Ceiling Support Box is available (6" diameter DuraTech only). Engineered for continuous operation at 1000°F flue gas temperatures, DuraTech meets rigorous UL standards, including testing at 1400°F for one hour and three ten-minute chimney fire tests at 2100°F.
Applications:
5”-8” DuraTech is a double-wall, all-fuel chimney system for use with wood stoves, fireplaces, furnaces, boilers, ranges, water heaters, or other appliances fueled by wood, oil, coal, or gas, and zero-clearance fireplaces that are factory-built.
Materials and Construction:
5”-8” diameter pipe features inner wall of .020” 430 stainless steel. Outer wall options of .016” 430 stainless steel or .021” galvalume steel. A thermal blanket insulation is encased between walls. Stainless steel end rings seal the pipe. DuraTech features light weight insulation, twist-lock fittings, support boxes with factory installed starter sections, elbows with 360° swivel base, select black finish pipe lengths, five-foot length pipe sections, and adjustable pipe lengths.
Clearances:
2” clearance to combustibles.
Shrouds:
UL Listed with Duravent shroud specifications. Information available online at www.duravent.com or call and request L157. Diameters 5”-8”
Listings:
c-UL-us Listed to UL 103 HT and CAN/ULC-604 (MH7399) (Stainless steel outer wall required for oil-burning installations in Canada).
Technical Specifications
View AllCloseAdditional Product Info
• DuraTech Installation Instructions (PDF, 1.7MB)
• DuraTech Adjustable Length Installation Instruction Supplement ( PDF, 673KB)
• DuraTech Universal Support Installation Instruction Supplement (PDF, 698KB)
• DuraTech Shroud Instructions (PDF, 434KB)
• DuraTech®: New Chimney Cap Assembly L1510 Installation Instruction Addendum (PDF, 445KB)
Sales Sheets:
• DuraTech Product Brochure (PDF, 1.3MB)
• DuraTech Install Guide (PDF, 1.0MB)
• DuraTech Comparison (PDF, 589KB)
• Woodburning Best Practices (PDF, 391KB)
• Oil Sizing Chart (PDF, 122KB)
Catalogs:
• DuraTech 5"-8" Catalog Section (PDF, 5.9MB)
• DuraVent All Products Catalog (PDF, 47.4MB)
Bulletins:
• DuraTech® 5”-8” Square Ceiling Support Box w/ Collar (PDF, 70KB)
• Black Paint (PDF, 889KB)
• DuraVent now offering DuraTech Tee Cap (PDF, 458KB)
• DuraTech Square Ceiling Support Box (PDF, 205KB)
• DuraTech Adjustable Parts (PDF, 380KB)
• DuraTech Snow Splitter (PDF, 161KB)
• DuraTech Finishing Collar with Mechanical Connection (PDF, 196KB)
• DuraTech for Oil (PDF, 186KB)
• DuraTech Finishing Collar w/Adapter (PDF, 194KB)
