Von Duprin 3547AF-4ft Fire Rated Concealed Vertical Rod Exit Device, Narrow Stile Smooth Case Less Dogging

Von Duprin 3547AF-4ft Fire Rated Concealed Vertical Rod Exit Device, Narrow Stile Smooth Case Less Dogging

Commercial-Grade Concealed Vertical Rod Exit Device for Narrow Stile Doors

The Von Duprin 3547AF-4ft is a fire-rated, 4-foot concealed vertical rod exit device engineered for narrow stile single and double doors in demanding institutional environments. Featuring a smooth mechanism case and a 5/8" bottom bolt concealed vertical rod configuration, this device accommodates door stiles as narrow as 2-1/8" (44 mm) for aluminum stiles and as narrow as 4" (102 mm) for wood door stiles. Certified to ANSI/BHMA A156.3 2014 Grade 1 standards and listed under ANSI/UL 10C for fire-rated applications, the 3547A-F delivers the reliability required for schools, hospitals, and government facilities. The device is non-handed (except when the SS signal switch option is used), offering flexible installation across a wide range of door configurations.

Professional Features & Benefits

• Narrow Stile Compatibility: Fits door stiles as narrow as 2-1/8" (44 mm) for aluminum stile doors and as narrow as 4" (102 mm) for wood door stiles, making it ideal for narrow stile commercial door applications.
• Fire-Rated Construction: Certified to ANSI/UL 10C and CAN/ULC-S104 for fire-rated door applications, ensuring compliance with fire and life safety codes in commercial and institutional buildings.
• ANSI/BHMA Grade 1 Certified: Meets ANSI/BHMA A156.3 2014 Grade 1 standards — the highest industry certification — for heavy-duty performance in high-traffic institutional environments.
• Smooth Mechanism Case Design: The 3547A features a smooth mechanism case (as distinguished from the grooved case of the 3347A), providing a clean architectural appearance suited to modern commercial interiors.
• Concealed Vertical Rod with 5/8" Bottom Bolt: The "47" device type designation confirms a concealed vertical rod configuration with a 5/8" bottom bolt, keeping hardware hidden for a streamlined look while maintaining secure latching.
• Non-Handed Configuration: The device is non-handed except when the SS (signal switch) option is used, simplifying inventory management and installation across varied door applications.
• One-Piece Center Case Cover: Newly designed one-piece center case cover enhances durability and provides a cleaner, more robust mechanism housing for long-term reliability.
• Field-Configurable & Retrofit-Ready: A variety of field-configurable options are available, including CDSI/HDSI security dogging indicators, QEL electronic latch retraction, and electronic switches (RX request-to-exit, LX latchbolt monitoring) for integration with access control systems.
• Manufacturer Warranty: Backed by Von Duprin's manufacturer warranty for added confidence and protection in commercial installations.

Technical Specifications

• Product Group: Exit Devices and Trim
• Series: 33 & 35 Series
• Grade: Grade 1
• Fasteners: Includes 1-3/4" and 2-1/4" wood/metal door fasteners, SNB included
• Product Subgroup: Exit Devices - Vertical Rod
• Subcategory: Concealed Vertical Rod Exit Devices
• Latch Throw: 3/4"
• Product Type: Exit Devices - Concealed Vertical Rod
• Commercial/Residential: Commercial
• Device Centerline from Finished Floor: 39-13/16"
• Stile Type: Narrow Stile
• MAP Policy: Yes
• Door Hand Direction: Non-Handed
• Door Thickness Range: 1-3/4"
• Product Size: 48"
• Product Dimension: 8-3/16" x 1-9/16" x 2-13/32"
• Fire Rating: Yes
• Product Projection: 3-13/16"
• Product Style: Push Pads
• Product Category: Exit Devices and Trim
• Department: Door Hardware

Professional Applications

• Educational Facilities — Schools and Universities
• Healthcare Institutions — Hospitals and Medical Centers
• Government and Municipal Buildings
• Commercial Office Buildings
• Industrial and Warehouse Facilities
• Multi-Tenant Residential Properties
• Retail Establishments Requiring Fire-Rated Egress Compliance

Why Choose Von Duprin Quality?

Von Duprin concealed vertical rod exit devices are engineered to the highest industry standards, with the 3547A-F Series certified to ANSI/BHMA A156.3 2014 Grade 1 and listed under ANSI/UL 10C and CAN/ULC-S104 for fire-rated door applications. The smooth mechanism case, one-piece center case cover, and non-handed design reflect Von Duprin's commitment to durable, architecturally refined hardware built for institutional environments. Trusted in schools, hospitals, and government buildings, Von Duprin exit devices deliver dependable performance where life safety compliance is non-negotiable.