Ul l501

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Ul l501

Building and fire codes require fire and smoke protection features to safeguard building occupants from fire hazards and hazards associated with smoke and hot toxic gases generated during a fire situation. This includes requiring fire-resistance-rated assemblies, such as fire walls, fire barriers, fire partitions, shaft enclosures and horizontal assemblies be provided to limit the spread of fire. This system of passive protection is an integral part of the overall fire safety approach taken by the model codes. This marking and application guide provides important information on limiting the spread of fire, smoke and toxic gases by protecting duct penetrations and air-handling openings in fire and smoke rated assemblies. There are five types of dampers recognized by the model codes for this purpose: fire, smoke, combination fire-smoke, ceiling and corridor dampers. UL certifies all five types of dampers in accordance with the requirements in model building, fire, and mechanical codes. These dampers and the applications for which they are certified are covered in detail in this guide. There are also duct protection methods that are an integral part of fire-resistance rated assemblies, and are described within the designs. See section 3. For information on smoke control systems, see NFPA Product iQ is free to use, but does require a one-time registration. UL has developed this guide for use by code and inspection authorities, architects, contractors, installers and other interested parties. It is intended to aid in understanding the types of dampers which exist, in association with the applicable codes and standards to facilitate safe, code-compliant installations.

Email Required. It regulates the installation, operational testing, periodic inspection and maintenance of fire, combination fire-smoke and ul l501 dampers used to protect ducts and air transfer openings in walls, floors, and ceilings against the spread of fire within, into, or out of buildings, ul l501.

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Ul l501

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It is important to note that ceiling dampers covered for this specific application are only intended for use in those UL fire resistance designs that indicate the use of a hinged door type damper in the design. Types of dampers include fire dampers, smoke dampers, combination fire-smoke dampers, ceiling dampers and corridor dampers. Ceiling Dampers For Use In Lieu Of Hinged Door Type Dampers — Where floor-ceiling or roof-ceiling designs contain air ducts and specify the use of hinged door type dampers over each duct outlet, ceiling dampers are investigated for use in lieu of the specified hinged door type dampers. The UL certification of ceiling dampers does not cover the products for general installation in any floor-ceiling or roof-ceiling design. Rating Required Select Rating 1 star worst 2 stars 3 stars average 4 stars 5 stars best. Nominal 2Ft. These ratings represent the maximum airflow and closure pressure ratings tested for that product. The construction of floor-ceiling or roof-ceiling assemblies evaluated by UL are published in the BXUV product category. Injection molded high transmission frosted acrylic diffuser. Instructions are required to be shipped with each Damper for use by the installation contractor at the construction site. Although these ratings relate to individual dynamic ceiling damper models it is important to note that both static and dynamic ceiling dampers do not have an assigned hourly fire-resistance rating. Wet location. Ceiling dampers are designated as either static or dynamic and are evaluated for use in HVAC systems.

Navigate your business in an increasingly complex world with industry-leading research and actionable insights from UL Solutions. Explore our press releases and news updates. Delve into detailed press kits for information on our work.

Heavy Duty HP: 0. Price Now. In certain circumstances, steel mullions can be used to divide a large wall or vertical partition opening into smaller individual openings, allowing fire dampers for use in static systems to be sized and installed within the limitations of the certification. Like any appliance, field servicing of these products is not covered under the scope of the UL certification program. Frame: R8. As a general rule, vertical ducts rising through fire rated floors are to be protected by fire rated shaft enclosures. In addition to an hourly fire-protection rating, fire dampers for use in dynamic systems are also provided with an airflow rating which indicates the maximum velocity damper open and static pressure damper closed for which the damper is designed. Normal Duty Current: Amps. The specific equipment investigated under this program bears the UL Field Evaluation label. Heavy Duty Current: 77Amps.