Grease Duct

PREFAB GREASE DUCT: THE SMART SOLUTION

Security Chimneys' Factory-Built, UL-Listed Prefab Grease Duct is designed for efficiency, safety, cost savings, and compliance. It provides a plug-and-play alternative to traditional welded steel duct systems.

CUSTOMER DRIVEN FEATURES

For Installers: 
No welding needed, prefab eliminates or greatly reduces the need for hard to find, expensive welders. Designed for easy install. 

For Project Engineers or Design Build Contractors:
Support throughout the project by our Design Team who ensure proper specs and lowest-cost solutions.

For AHJ/Inspectors:
Easy inspections due to code compliant no-leak solutions in new or existing buildings.

For General Contractors:
Faster duct installation reduces time on site and keeps project on schedule.

For Architects:
Options to save space and provide superior aesthetics due to large product line.

For Owners:
Reduced fire risk, lower maintenance and energy costs, less long-term liability.

CORE BENEFITS

Risk Reduction

• Zero-leak design prevents grease/water leaks, reducing fire risk, mold, and water damage.
• Fire-rated to UL 2221 (2-hr), preventing spread of fire.

Cost Savings

• Lower install and lifecycle costs via modular design, pre-installed insulation, and fewer skilled labor needs.
• Reduced life-cycle expenses due to stainless steel durability, energy efficiency, and ease of cleaning.

Efficient Installation

• Modular, pre-engineered system.
• No on-site welding = less risk and faster, safer installation.

Compliance & Certification

• UL1978 and UL2221 listed
• Complies with IMC, UMC, NFPA 96
• Fire tested: 500°F continuous, 2000°F for 30 min

Why Security Chimneys' Prefab Grease Duct?

Security Chimneys' Prefab Grease Duct provides benefits that help Owners reduce Expense and Risk. These benefits lower install and lifecycle costs, reduce risks and ensure less long-term headaches. They also reduce the chances for problems and conflicts between other stakeholders including contractors, AHJ’s and engineers working on your project.

REDUCED RISK … LOWEST COST

Reduced Risks | Superior Warranty | Lower Costs – Install & Lifecycle Expenses
Design, Application, & Training Support

What are the Benefits?

What if you could reduce your risks of leaks during cleaning, operations and a possible fire… The Security Chimneys prefab solution is your zero-leak option. Zero-leaks during cleaning ensures water damage during duct cleaning and subsequent mold aren’t a problem. Grease leaks during operations and fire escaping the duct are not an issue. Safety, IAQ and cleanliness are benefits of DuraVent’s Zero-leak Grease Duct.

What if you could keep the job on schedule without delays and conflicts… Zero leaks and code compliant design support means your job goes smoothly, passes inspection without delays and conflicts and keeps the overall project on-schedule. Contractors, AHJ’s and Engineers have one less source of concern.

What if you could lower installation costs… a long list of Voice of Customer driven features ensures the system is installed quickly and correctly leading to lower costs, higher quality and durability. 

Finding good employees will not get easier. A prefab, Plug-N-Play solution, ensures you save time on the jobsite and reduce costs using less skilled, less expensive and more available manpower.

What if you could reduce Life-cycle Expenses… stainless steel inner wall, round design, centering sleeve, no-tool tee cap and access panels are just some of the features that improve energy efficiency, quality and ease of maintenance, and durability. Additionally, there is a limited lifetime warranty

Fire-rated (DIS3Z) significantly reducing installation footprint and frees up space for other use.

No need to build an expensive fire-rated chase or apply two layers of fire wrap typically required for welded steel grease duct designs.

Certification:
UL1978, UL2221 (2 HR)
IMC, UMC and NFPA96 Code Compliance

Assembly:
Blanket insulation is already installed in the portion that lines up with the outside casing. We provide an insulation band to be field installed behind the outside band.

Goes together with the inner flange and inner locking band (with centering extension). The outer locking band is on the outside for more support, making it a stronger system.

Diameters:
Available in 5″- 36″; 3″ wall insulation and single wall. DuraStack Pro is now UL 1978 listed for applications where 1″ air insulated, 1″, 2″, or 4″ AES Wool Insulated grease duct is required. Please see the Security Chimneys Pro product pages for more details. 

Listings:
DuraVent, Inc. Model DIS3Z grease ducts have been tested and listed by UL to UL/ULC Standards. UL 1978 Grease Duct and UL2221(2 hr Fire Rating). IMC, UMC and NFPA96 Code Compliance.

Grease Duct is subjected to rigorous and stringent requirements of the UL1978 & UL-2221 standard, including continuous firing at 500°F (260°C), plus 30 minute firing at 2000°F (1093°C).

More Features & Benefits:

• Stainless steel construction is highly corrosion resistant and extremely durable.
• Round tubular design maintains structural integrity significantly longer than a rectangular welded steel product.
• 0″ Clearance grease duct (3″ insulation & 2 hours fire rating) eliminates the need for a separate fire-rated enclosure around the duct.
• Inner casing available in 304 or 316 stainless steel.
• Outer casing available in 304 or galvalume. 
• Superior flow rate is achieved with round tube construction.

• Modular design assembles quickly with common tools.
• Contaminants of combustion are not trapped within the flue like it is commonly found in the corners of a rectangular design, thus making it much easier to clean and reduce the chance of fire from accumulated grease.
• No safety concerns with having welding on site that could cause a fire.
• Backed by a comprehensive Limited Lifetime Warranty.