The DuraDuct line of prefabricated duct systems offer protection in virtually any situation. To find your local sales representative please use our Mechanical Rep Locator.
2-Hour Fire Rated Ductwork
DuraDuct™ GNX is a light weight 2-hour fire rated duct system.
DuraDuct™ GNX is an innovative UL/ULC listed 2-hour fire resistance rated duct system that does not require additional wraps or enclosures. It uses a unique and patented double wall construction that is lightweight, impact and moisture resistant.
The duct assembly consists of a series of prefabricated duct sections which feature an easy-to-assemble 4-bolt type connection system familiar to installation contractors.
DuraDuct™ GNX’s slim profile provides substantial space savings by eliminating bulky shaft walls or external wrap enclosures. The quick and easy assembly combined with single trade installation helps to reduce labor costs.
DuraDuct™ GNX Listing Numbers: UL listing HNLJ V-28
DuraDuct™ GNX is a slim, lightweight and versatile fire rated duct solution designed to help you save space and time.
US Patent : 7195290 CDN Patent : 2450977
DuraDuct™ GNX installation in an underground parking garage.
2-Hour Fire & Blast Rated Duct System
The largest 2-hour UL/ULC fire rated duct system that also provides blast resistance.
DuraDuct™ HP was the first fire rated ventilation system tested in North America and continues to offer fire, blast and structural capabilities that are the best in the industry.
Fabricated using DuraSteel, a unique non-combustible material consisting of two metal sheets mechanically bonded to a fiber cement core that is fire, blast, moisture and impact resistant, the DuraDuct™ HP creates a safer environment than standard duct systems.
The space saving DuraDuct™ HP arrives to the project site ready for installation. Once installed, the fire resistance rating is achieved immediately without the need for external wraps or enclosures of any kind, thus eliminating multiple trade co-ordination and helping to improve the overall project schedule.
DuraDuct™ HP Listing Numbers: UL listing HNLJ V-15
DuraDuct™ HP is regarded today as the premier fire and blast rated duct solution when the primary goal is protecting people and property worldwide.
DuraDuct™ HP plenum.
Large DuraDuct™ HP installation in a subway system.
Zero Clearance Kitchen Exhaust Duct
DuraDuct™ KEX is a pre-manufactured and non-combustible double wall kitchen exhaust duct system.
DuraDuct™ KEX is the largest listed kitchen exhaust duct system in the industry. It is rated for 2 hours fire resistance with zero clearance to combustibles and it is compliant with International Mechanical Code (IMC), National Building Code of Canada (NBCC) and National Fire Protection Association (NFPA) codes.
The DuraDuct™ KEX system is listed to meet the requirements of ASTM E2336 and CAN/ULC-S144 as well as being listed for compliance to the International Code Council ICC-ES AC101.2 acceptance criteria for segmented grease duct systems.
By using companion flange connections, DuraDuct KEX eliminates the field welding required for contractor fabricated grease duct systems. Utilizing a rectangular footprint, the DuraDuct™ KEX system allows flexibility in the design of Type I and Type II commercial kitchen exhaust duct systems, enabling the designer to achieve the required airflows in shallower ceiling spaces.
DuraDuct™ KEX listing number: ETL listing DSB FMF 120-01
The DuraDuct™ KEX system has proven through extensive testing to ensure a safe and cost effective solution for new restaurant exhaust systems, commercial kitchens and retrofitting kitchen exhaust duct systems.
A side profile of a DuraDuct™ KEX with a stainless outer shell.
DuraDuct™ KEX installation.US Patents : 9557071, 9976768, 10024569
Single Wall Kitchen Exhaust Duct
DuraDuct™ SED is a pre-manufactured, single wall kitchen exhaust duct system, rated for 18” clearance to combustibles.
As the largest UL 1978 and CAN/ULC-S662 listed exhaust duct system in the industry, DuraDuct™ SED is compliant with the requirements of the International Mechanical Code (IMC), National Building Code of Canada (NBCC) and National Fire Protection Association (NFPA) codes.
Featuring 108” long sections and installer-friendly companion flange connections that include a high temperature liquid-tight sealing system, the DuraDuct™ SED system eliminates the dangerous field welding required for contractor fabricated grease duct systems. The rectangular footprint provides designers of Type I and Type II commercial kitchen exhaust duct systems with the flexibility to achieve required air flows when shallow ceiling spaces limit the size of the ducts.
This system is also ideal for projects where multiple hoods are required to be combined into a common (manifold) duct, giving the designer the ability to reduce the space required and the cost of installing multiple duct runs.
Constructed using code compliant 16 gauge steel or 18 gauge stainless steel, DuraDuct™ SED’s inner liner and outer surfaces are easily cleaned of grease or other contaminants, helping to ensure the longevity and compliance of the system.
DuraDuct™ SED listing number: ETL listing DSB FMF 30-01
Extensive structural, fire and leakage testing has been performed on the DuraDuct™ SED system, helping to ensure a safe solution for new restaurant exhaust systems, commercial kitchens and retrofitting kitchen exhaust duct systems.
A DuraDuct™ SED fitting.
DuraDuct™ SED connected to an existing exhaust system.
US Patent : 9976768
Laboratory Exhaust Duct
DuraDuct™ LXD is a single wall laboratory exhaust duct system.
Featuring installer friendly companion flange connections that include a chemically inert and liquid tight gasketed sealing system. The LXD system eliminates the field welding required for contractor fabricated laboratory duct systems. Third party tested to positive and negative pressures to achieve 10” w.c. in accordance with ANSI/ASHRAE/SMACNA Standard 126-2000 as well as pressure decay tested to 10” in accordance with ASME Standard N510, Testing of Nuclear Air Treatment Systems.
The duct may be supplied in a rectangular or round footprint providing additional flexibility that allows designers to achieve the required air flows when shallow ceiling spaces or shaft requirements limit the duct size. The duct is offered in minimum 18 gauge 304 or 316 stainless steel with fully welded seams. The DuraDuct™ LXD patented flange design allows a flat surface for gasket application, offering a complete, cost effective exhaust solution. Access doors are available and are factory installed and pressure tested prior to delivery to site. Common duct components such as end caps, terminations, fume hoods and fan adaptors are included in the complete LXD system scope with a 2HR fire rated option also available.
Extensive structural, fire and leakage testing has been performed on the DuraDuct™ LXD system ensuring a safe solution for new construction or retrofitting of laboratory exhaust duct systems.
ETL Listed ASTM E119 & CAN/ULC-S101 Fire Resistive Assemblies
DuraSystems DuraDuct™ model 2HR is a direct code-compliant fire resistive rated solution.
DuraDuct™ 2HR is the industry’s first and only ventilation duct and enclosure assembly specifically designed to meet International Mechanical Code (IMC), International Building Code (IBC) and National Building Code of Canada (NBCC) requirements for fire resistance. This assembly also addresses internal and external fire exposures and achieves the specific application requirements for moving air, addressing containment and structural supporting requirements, providing a complete single source solution.
Shaft enclosures shall meet the code requirements of Section 703 in the IBC which requires ASTM E119 or UL 263 certification as well as the NBCC which requires CAN/ULC-S101 to determine the fire resistance rating.
When alternate materials and methods fall short of meeting the requirements of code prescribed fire resistance ratings, DuraSystems’ 2HR is the solution.
Product Features & Solutions:
DuraDuct™ 2HR - Patent Pending
For a code-compliant, single source solution, DuraSystems’ DuraDuct 2HR is the clear choice!
3-Hour Fire Rated Duct
DuraDuct™ 3HR is the slimmest 3-hour fire resistance rated duct system in the industry.
DuraDuct™ 3HR is a 3-hour fire resistance rated, zero clearance ventilation duct system with a slim profile that helps you maximize space.
DuraDuct™ 3HR is impact and moisture resistant as well as maintenance free. As the industry’s thinnest 3-hour fire rated duct system, this slim profile is achieved by eliminating the need for bulky wraps and enclosures.
Once installed, the fire rating is achieved immediately without the need for additional treatment of any kind, thus eliminating multiple trade co-ordination while helping to improve the overall project schedule.
Installed, DuraDuct™ 3HR is suspended on steel threaded rods and support cradles that are fully tested under fire conditions as recorded in the product UL listings. Further, due to the system being factory fabricated under UL follow-up, the duct system is easily inspected as the pre-fabricated design eliminates site installation variables that must be closely monitored to ensure full compliance with listings and tested configurations.
DuraDuct™ 3HR Listing Number: UL listing HNLJ V-23
DuraDuct™ 3HR is manufactured to meet project specific SMACNA leakage and deflection requirements and has unique acoustic properties to offer an extended ability for single source design solutions.
4-Hour Fire Rated Duct
DuraDuct™ 4HR is the only 4-hour fire rated duct system on the market.
DuraDuct™ 4HR is a single source 4-hour fire rated, zero clearance ventilation duct system ideal for applications when the highest degree of fire protection is required. The DuraDuct™ 4HR provides the flexibility you need to get the job done right. Once the DuraDuct™ 4HR is installed, the fire rating is achieved immediately without the need for any additional treatment of the duct.
The DuraDuct™ 4HR system is easily inspected as the pre-fabricated design eliminates the need to closely monitor the site installation variables so often found with wrap and enclosure type systems.
Pair the DuraDuct™ 4HR with DuraSystems’ 4 hour fire rated walls and ceilings to source a complete design solution for extreme environment applications.
DuraDuct™ 4HR Listing Numbers: UL listing BXUV G302
UL listing BXUV V460
When the highest degree of fire protection is needed the DuraDuct™ 4HR is the solution you can trust to protect your facility.
DuraDuct™ 4HR installations.
Pre-fabricated Ballistic-Rated Duct System
DuraDuct™ BRD provides ballistic resistance up to UL752 Level 3 or National Institute of Justice (NIJ) Level IIIA.
DuraDuct™ BRD offers ballistic protection against penetration and passage of fragments. It is designed to preserve the stability and integrity of the mechanical ventilation system from the high impact of a ballistic threat.
Used in high security facilities to provide emergency supply air to safe rooms, DuraDuct™ BRD provides the protection required for safe shelter and safe egress for personnel in emergency situations.
DuraDuct™ BRD utilizes a lightweight fiberglass reinforced plastic (FRP) composite panel which is 25% lighter than equivalent systems. Three levels of ballistic protection are currently available, ranging from multiple rounds from a small caliber firearm (UL752 Level 1 / NIJ Level I) to multiple rounds from a 0.44 Magnum at close range (UL752 Level 3 / NIJ Level IIIA).
DuraDuct™ BRD is a versatile ballistic-rated duct system designed for protection of critical life safety ventilation systems in high risk operations.
Underground Corrosion Resistant Duct
The prefabricated DuraDuct™ UCR is a corrosion resistant, underground duct system.
DuraDuct™ UCR is a stainless steel underground duct system that is designed to provide superior structural strength and integrity in a variety of harsh underground environments. Available in both round and rectangular cross sections, the UCR system uses a proven liquid and air tight bolted joint connection, helping to reduce installation time, and does not require any additional reinforcing or supports, the bane of most underground duct systems.
With a fully customizable design, DuraDuct™ UCR is engineered to the specific requirements of each project. The unique design of the DuraDuct™ UCR system can eliminate the requirement for concrete encasement of the ductwork and reduces the excavation and backfill required.
The DuraDuct™ UCR duct assembly is shipped to site with fully welded and tested seams, ensuring a leak free installation. With a smooth inner surface allowing for effective air movement and available in lengths up to 10 feet, DuraDuct™ UCR is your answer when looking for a quick, easy, and cost effective installation.
DuraSystems offers a comprehensive selection of fittings and configurations to suit your project’s needs.
DuraDuct™ UCR is a unique pre-fabricated rectangular underground duct system that is ideal for corrosive environments.
Acoustic Option for DuraDuct Systems
A DuraDuct acoustic option can be added to any DuraDuct ventilation system to help reduce fan noise and still allow for superior fire protection.
All DuraDuct ventilation systems offer outstanding fire protection with excellent breakout noise reduction capabilities. Sometimes, however, excessive fan noise traveling through the duct calls for an enhanced noise reduction solution. By enhancing the inside of any DuraDuct ventilation system with acoustic material the DuraDuct acoustic option helps reduce unwanted fan noise problems while the outer shell of the DuraDuct system still provides fire, impact and moisture resistance without the need for additional wraps or enclosures. With an overall footprint just slightly larger than the DuraDuct system, the DuraDuct acoustic option offers a slim, lightweight and maintenance-free acoustic solution.
The slim profile DuraDuct Acoustic option can be added to any DuraDuct ventilation system to help combat challenging fan noise issues, while still allowing for superior fire protection.
Single Skin Access Doors
UL/ULC listed single skin grease duct access doors that meet or exceed all NFPA 96 and mechanical code requirements.
DuraSystems’ UL/ULC listed grease duct access doors are available in galvanized steel, 304 stainless steel or 316 stainless steel construction and can be used in zero clearance systems. They come in various shapes and size, including curved designs for installation on round duct.
DuraSystems’ UL1978 listed grease doors are light weight and easy to install, as no frame is required and a cut around template sticker is provided. The grease doors require no welding and no tools are required for removal or reinstallation of the grease door. A single rigid handle also helps eliminate the misalignment problems so often seen in grease door installations.
Listing Numbers: UL listing YYXS MH26975
DuraSystems’ Grease Duct Access Doors are easy to install and remove and are the perfect solution to allow for proper cleaning of your grease duct system.
A curved access door installation.