Von Duprin 3547A-4ft Concealed Vertical Rod Exit Device - 4 ft Grooved Case Narrow Stile, Grade 1

Von Duprin 3547A-4ft Concealed Vertical Rod Exit Device - 4 ft Grooved Case Narrow Stile, Grade 1

Heavy-Duty Narrow Stile Concealed Vertical Rod Solution for Institutional and Commercial Applications

The Von Duprin 3547A-4ft is a professional-grade concealed vertical rod exit device engineered for demanding institutional environments including schools, hospitals, and government buildings. Featuring a grooved mechanism case and narrow stile design, 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 UL listed for panic exit hardware, the 3547A-4ft delivers reliable, code-compliant egress performance on single and double door applications. 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 aluminum door stiles as narrow as 2-1/8" (44 mm) and wood door stiles as narrow as 4" (102 mm), making it ideal for glass storefront and narrow stile door applications.
• Grade 1 Certified Performance: ANSI/BHMA A156.3 2014 Grade 1 certified for the highest level of commercial durability and reliability in high-traffic institutional settings.
• Comprehensive Code Compliance: Meets ANSI/UL 10C (fire-rated configurations), ANSI/UL 305, CAN/ULC-S104 (fire-rated configurations), and CAN/ULC-S132 for broad code applicability.
• Non-Handed Design: The concealed vertical rod device is non-handed except when the SS (signal switch) option is used, simplifying specification and reducing inventory requirements.
• Concealed Vertical Rod with 5/8" Bottom Bolt: The 47-suffix configuration provides a concealed vertical rod mechanism with a 3/4" latch throw and 5/8" bottom bolt for clean aesthetics and secure latching performance.
• Field-Configurable Retrofit Options: Compatible with CDSI/HDSI security dogging indicators, QEL electronic latch retraction, and electronic switches including Request to Exit (RX) and Latchbolt Monitoring (LX) for access control integration.
• One-Piece Center Case Cover: Newly designed one-piece center case cover provides a streamlined appearance and simplified maintenance access.
• Broad Trim and Function Compatibility: Supports 360 lever/thumbpiece trim (Classroom, Passage, Dummy functions), 386 pull trim (Storeroom, Dummy), and 388 optional pull trim (Storeroom), with many lever and finish options available.
• AX and CX Upgrade Paths: AX accessible device option certified to meet 5 lb. force requirements for 2010 ADA (Chapters 404.2.7 and 30934) and 2013 California Building Code (Chapter 11B-309.4); CX CHEXIT option meets NFPA and IBC requirements for 15-second delayed egress.

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"
• Dogging Configuration: Hex Key Dogging
• Product Dimension: 8-3/16" x 1-9/16" x 2-13/32"
• Fire Rating: No
• Product Projection: 3-13/16"
• Product Style: Push Pads
• Product Category: Exit Devices and Trim
• Department: Door Hardware

Professional Applications

• Educational Facilities and Schools
• Healthcare Institutions and Hospitals
• Government and Municipal Buildings
• Commercial Office Buildings
• Retail Establishments with Narrow Stile Doors
• Industrial and Warehouse Facilities
• Multi-Tenant Residential and Mixed-Use Properties

Delayed Egress Compliance

The CX CHEXIT upgrade option meets NFPA and IBC requirements for delayed egress applications. When activated, a standard device keeps doors secure for 15 seconds after a request to exit while a nuisance alarm sounds, providing code-compliant controlled egress for facilities requiring delayed exit functionality.

Why Choose Von Duprin Quality?

Von Duprin concealed vertical rod exit devices are certified to ANSI/BHMA A156.3 2014 Grade 1 standards and UL listed for panic exit hardware, ensuring the highest level of performance in institutional and commercial environments. The 3547A-4ft is engineered for high use and abuse in demanding applications such as schools, hospitals, and government facilities, with a broad range of field-configurable retrofit options and upgrade paths to keep pace with evolving technology. Engineered for dependable performance where reliable egress is essential.