Von Duprin 3548A-3ft Concealed...
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$4,068.00
$2,826.53
Von Duprin 3548A-3ft Concealed Vertical Rod Exit Device for Wood Doors, Narrow Stile, 36" Smooth Case

Von Duprin 3548A-3ft Concealed Vertical Rod Exit Device for Wood Doors, Narrow Stile, 36" Smooth Case

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Model: 3548AEO 3 US26D
$4,068.00
$2,826.53
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In Stock (leaves warehouse same day if ordered before 3pm ET)

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Von Duprin 3548A-3ft Concealed Vertical Rod Exit Device for Wood Doors, Narrow Stile, 36" Smooth Case

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

The Von Duprin 3548A-3ft is a professional-grade, narrow stile concealed vertical rod exit device engineered for wood doors in demanding commercial and institutional environments. Featuring a smooth mechanism case, this 36" device accommodates door stiles as narrow as 2-1/8" (44 mm) for standard applications and wood door stiles as narrow as 4" (102 mm), with a 1-3/4" door thickness range and a 3/4" latch throw. Certified to ANSI/BHMA A156.3 2014 Grade 1 standards and UL listed for panic exit hardware, the 3548A-3ft delivers the reliability required in schools, hospitals, and government facilities.

Professional Features & Benefits

  • Narrow Stile Compatibility: Fits door stiles as narrow as 2-1/8" (44 mm) for standard doors and wood door stiles as narrow as 4" (102 mm), providing versatile installation options across a wide range of door configurations.
  • Smooth Mechanism Case: The 35A Series smooth case design distinguishes this device from the grooved 33A Series, offering a refined architectural appearance suited for upscale commercial and institutional settings.
  • Concealed Vertical Rod with 1-1/2" Bottom Bolt: The "48" device type designation indicates a concealed vertical rod configuration with a 1-1/2" bottom bolt, providing secure top and bottom latching while maintaining a clean door appearance.
  • Grade 1 Certified Performance: ANSI/BHMA A156.3 2014 Grade 1 certified and UL listed (ANSI/UL 305; ANSI/UL 10C for fire-rated configurations; CAN/ULC-S104 for fire-rated; CAN/ULC-S132), meeting the highest industry standards for panic exit hardware.
  • Non-Handed Design: The concealed vertical rod device is non-handed (except when the SS signal switch option is used), simplifying inventory management and installation across multiple openings.
  • Field-Configurable Options: A variety of field-configurable options are available, including retrofit kits (CDSI/HDSI dogging indicators, QEL electronic latch retraction, RX request-to-exit, and LX latchbolt monitoring switches) to keep pace with evolving facility technology needs.
  • Hex Key Dogging: Equipped with hex key dogging for convenient hold-open functionality in appropriate applications.
  • ADA and Delayed Egress Upgrade Paths: Upgradeable to AX (ADA-compliant, certified to 5 lb. force requirements per 2010 ADA Chapters 404.2.7 and 30934 and 2013 California Building Code Chapter 11B-309.4) or CX CHEXIT (delayed egress meeting NFPA and IBC requirements, 15-second delay with nuisance alarm).
  • Included Fasteners: Includes 1-3/4" and 2-1/4" wood/metal door fasteners with SNB included for straightforward installation on wood doors.

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: 36"
  • 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 (Schools and Universities)
  • Healthcare Institutions (Hospitals and Clinics)
  • Government and Municipal Buildings
  • Commercial Office Buildings
  • Industrial and Warehouse Facilities
  • Multi-Tenant Residential Properties
  • Retail Establishments

Why Choose Von Duprin Quality?

Von Duprin concealed vertical rod exit devices are engineered to the highest industry standards, with the 3548A-3ft certified to ANSI/BHMA A156.3 2014 Grade 1 and UL listed for panic exit hardware under ANSI/UL 305. The smooth mechanism case, non-handed design, and broad field-configurable retrofit options make this device a dependable long-term investment for institutional and commercial facilities. Designed specifically for high-use and high-abuse environments including schools, hospitals, and government buildings, Von Duprin exit devices deliver the professional-grade performance that demanding applications require.

Product Specs

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:
36"
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

Von Duprin 3548AEO 3 US26D – Frequently Asked Questions

1) Will the 3548A latch into my existing top and bottom strikes?
Latch throw is 3/4 inch at the latches, and the 48 device type uses a concealed vertical rod with a 1-1/2 inch bottom bolt. If your existing prep was cut for a different rod device, the top strike and the floor or threshold strike almost always need to be reworked to that geometry. Device centerline sits at 39-13/16 inches from finished floor, so check that against the existing through-bolt holes before you commit.
2) Does the 3548A meet the 5 pound ADA operating force requirement?
Only if you order the AX accessible device option, which is certified to the 5 lb. force requirement under 2010 ADA Chapters 404.2.7 and 30934 and 2013 California Building Code Chapter 11B-309.4. AX is a yes/no choice at order time, not a field add, so specify it up front on openings that have to meet that force limit.
3) Can I add electric latch retraction or a request-to-exit switch to this Von Duprin device?
Yes, and they're order-time options: EL electric latch retraction, QEL quiet electric latch retraction, or PN pneumatic. Switches include RX request to exit, RX2 double switch, LX latchbolt monitor, LX-RX combination, WP-RX waterproof, and the ALK alarm exit kits with or without RX and LX. Von Duprin also offers retrofit kits for CDSI/HDSI dogging indicators, QEL, RX and LX, so a mechanical device installed today can be electrified later without replacing it.
4) Is the Von Duprin 3548A Grade 1, and what is it UL listed under?
Certified to ANSI/BHMA A156.3 2014 Grade 1 and UL listed for panic exit hardware under ANSI/UL 305. The Grade 1 rating is the one institutional specs call for on high-traffic openings in schools and hospitals.
5) The 3548A-3ft is not fire rated - what concealed vertical rod device should I use on a fire rated opening instead?
The Von Duprin 3548A-3ft carries a fire rating of No, so a labeled opening needs a different device. Fire rated concealed vertical rod options include the Adams Rite 3600 Series and the Adams Rite 3900 Series, both Grade 1 and fire rated, the 3900 carrying a 1-1/2 hour rating, and the Sargent 12-MD8613, a fire rated Grade 1 classroom function device. Note that the Adams Rite 3600 and 3900 and the Sargent 12-MD8613 are all wide stile devices, so confirm the door stile before specifying - the 3548A-3ft is a narrow stile device.
6) What is the closest narrow stile concealed vertical rod alternative to the Von Duprin 3548A-3ft for a 36 inch opening?
The Falcon 24-C Series 36 inch device is the nearest match: it is a Grade 1 narrow stile concealed vertical rod exit device sized for a 36 inch door with a 1-3/4 inch door thickness, the same thickness the 3548A-3ft is built for. The difference is function - the Falcon 24-C is cataloged as exit only, while the 3548A-3ft is ordered with a trim function such as lever, night latch, thumbturn or dummy trim. If an outside trim is part of the opening, the 3548A-3ft covers it in one order; if the door is push-to-exit with no outside operation, the Falcon 24-C is the simpler build.
7) My door is a wide stile door - what replaces the Von Duprin 3548A-3ft there?
The 3548A-3ft is a narrow stile device, so a wide stile leaf needs a wide stile concealed vertical rod instead. Grade 1 wide stile options include the Corbin Russwin ED5800, built for 1-3/4 inch doors and available exit only or accepting trim, the DORMA 9100 Series heavy duty pushpad device with a 1-3/4 to 2-1/4 inch door thickness range, and the Adams Rite 8500 Series for hollow metal doors. The BEST Precision 2701 Series is a wide stile reversible device specifically described for wood doors, which is the closest wide stile counterpart if the leaf is wood like the 3548A-3ft application.
8) Is the Adams Rite 8600 a substitute for the Von Duprin 3548A-3ft?
Only in part. The Adams Rite 8600 Series is a Grade 1 narrow stile concealed vertical rod device that is not fire rated, which lines up with the 3548A-3ft on stile type, grade and fire rating. The distinction is door material: the 8600 is described for aluminum doors, while the 3548A-3ft is set up for wood doors and ships with 1-3/4 inch and 2-1/4 inch wood/metal door fasteners with SNB included. On an aluminum storefront leaf the 8600 is the right family; on a wood leaf stay with the 3548A.
9) My door is thicker than 1-3/4 inches - what concealed vertical rod device fits?
The Von Duprin 3548A-3ft is specified for a 1-3/4 inch door thickness. For a thicker leaf, the DORMA 9600BB Series covers 1-3/4 to 2-1/4 inches and is a heavy duty Grade 1 narrow stile pushpad device in a 36 inch non-fire rated size, which keeps the narrow stile and push pad configuration of the 3548A-3ft. The DORMA 9100 Series carries the same 1-3/4 to 2-1/4 inch range in a wide stile pushpad build.
10) Do I have to order the 3548A handed?
The device itself is non-handed, so one part number covers both swings. Handing still gets selected on the order (RHR or LHR) because trim and certain options follow the door, and the description notes the SS signal switch option is the exception to the non-handed build.
11) Concealed vertical rod or surface vertical rod - which should I use on a pair of wood doors?
Concealed rod, like the 3548A, runs the rods inside the door, so nothing is exposed to abuse and the door face stays clean. That's why it lands in schools, hospitals and government work. The trade-off is that the door has to be prepped for it, which means either ordering the door prepped or routing an existing one. Surface vertical rod is the retrofit answer when you can't prep the door. Either type latches at the head and the floor, so both secure a pair with no center mullion.
12) How much does the 3548A push pad stick out into the opening?
Projection is 3-13/16 inches from the door face, with a mechanism case measuring 8-3/16 x 1-9/16 x 2-13/32 inches. That projection is the number that matters in a tight vestibule or where the door swings toward a wall or a second leaf.
13) What outside trim can I get with the Von Duprin 3548A?
Eleven trim functions: exit only, dummy trim, lever, lever with blank escutcheon, lever with dummy trim, night latch, night latch with optional pull, thumbturn, thumbturn with blank escutcheon, thumbturn and unlocks, and thumbturn and unlocks with blank escutcheon. If you pick an L lever function you also choose the lever design - 01, 02, 03, 05, 06 (default), 07, 17 or 18.
14) Can I get the 3548A with cylinder dogging instead of hex key?
Standard build is hex key dogging, and you can swap it on the order for CD cylinder dogging, CDSI cylinder dogging with an indicator, or LD less dogging. Pick LD if the opening will ever be fire rated in future or your AHJ doesn't allow dogging. The indicator version is the one facilities crews like, since staff can see at a glance whether the device is dogged down.
15) What fasteners come with the Von Duprin 3548A for a wood door install?
Both 1-3/4 inch and 2-1/4 inch wood/metal door fasteners ship with the device, and SNB (sex nut and bolt) is included. Strikes and rod hardware for the top and bottom are part of the device package; outside trim is the separate selection you make when ordering.
16) I need delayed egress on a wood door exit - can this device do it?
Yes, via the CX CHEXIT upgrade, which is a 15-second delay with a nuisance alarm and meets NFPA and IBC delayed egress requirements. Specify it with the device rather than trying to bolt on a separate delayed egress product later.
17) What is the difference between the Von Duprin 3548A-3ft and the Corbin Russwin ED4800?
Both are Grade 1 narrow stile concealed vertical rod exit devices for 1-3/4 inch doors. The Corbin Russwin ED4800 is offered exit only or accepting trim. The 3548A-3ft is a push pad device with a smooth 35A mechanism case, a 3/4 inch latch throw, hex key dogging as standard with cylinder dogging, less dogging and cylinder dogging with indicator available, and eleven trim functions from exit only through lever, night latch and thumbturn variants. Pick by which trim and dogging configuration the opening calls for.
18) I want a crossbar look instead of a push pad - is there a narrow stile concealed vertical rod option?
Yes. The Corbin Russwin ED7800 is a Grade 1 narrow stile crossbar concealed vertical rod device for 1-3/4 inch doors, offered exit only or accepting operator trim. The Von Duprin 3548A-3ft is a push pad device, so if the building standard is a crossbar aesthetic the ED7800 is the narrow stile equivalent at the same grade and door thickness.
19) If I only need push-to-exit with no outside trim, is there a simpler option than the Von Duprin 3548A-3ft?
Yes. The 3548A-3ft is ordered in an EO exit only trim function, but if the whole opening set is exit only, dedicated exit only devices keep the order simpler. Narrow stile exit only concealed vertical rod options include the Falcon 1690EO in a 3 ft size and the Falcon 24-C in 36 inch, both Grade 1 for 1-3/4 inch doors, and the BEST Precision 2601, a non-handed narrow stile exit only device. The 3548A-3ft is itself non-handed, so either path keeps handing out of the order.
20) I need the same device on a 42 or 48 inch leaf - what matches the Von Duprin 3548A-3ft?
The 3548A-3ft is a 36 inch device. For wider leaves in a comparable configuration, the Falcon 1990EO is a Grade 1 narrow stile concealed vertical rod exit only device in a 44 inch size for 1-3/4 inch doors, and the CRL Jackson 1085 Series is a 48 inch non-handed concealed vertical rod panic device in exit only, wide stile. Confirm stile width and whether outside trim is required, since both of those are exit only builds.
21) I need a matching inactive leaf device to pair with the Von Duprin 3548A-3ft - what works?
The 3548A-3ft can itself be ordered in DT dummy trim or L-DT lever with dummy trim functions for the inactive leaf, which keeps the smooth case appearance consistent across the pair. A separate option is the Falcon 1491DT, a narrow stile concealed vertical rod dummy trim device with a 9970 pull in a 42 inch length, Grade 1 for 1-3/4 inch doors. Match the length to the leaf before ordering, since the Von Duprin device is a 36 inch size.
22) Will the CRL Jackson 1285 work where the Von Duprin 3548A-3ft is specified?
The CRL Jackson 1285 is a push pad concealed vertical rod panic exit device listed for narrow, medium or wide stile, so stile width is not the limiting factor - but it is an exit only device. The Von Duprin 3548A-3ft is ordered with a trim function, including lever with eight lever designs, night latch, thumbturn and blank escutcheon variants, so if the opening requires keyed or lever entry from the outside the 1285 does not cover it.
23) Is the Sargent MD8613F a direct swap for the Von Duprin 3548A-3ft on a wood door?
No. The Sargent MD8613F-LTRIM is a Grade 1 heavy duty concealed vertical rod device with hex dogging in a 36 inch by 84 inch size, but it is described for metal doors. The Von Duprin 3548A-3ft is a narrow stile device set up for wood doors and ships with 1-3/4 inch and 2-1/4 inch wood/metal door fasteners with SNB included. The two share hex dogging and Grade 1 certification, so the Sargent is the counterpart on a hollow metal leaf rather than a swap on wood.
24) What's the difference between the Von Duprin 33A and 35A exit device cases?
Mechanically they're the same 33/35 Series family; the difference is the case face. The 35A used on the 3548A is the smooth case, while the 33A is grooved. It's an appearance decision, so match whichever case is already running on the rest of the building's openings.
25) What finishes does the Von Duprin 3548A come in?
Ten: 605 bright brass, 606 satin brass, 612 satin bronze, 613 oil rubbed bronze, 625 bright chrome, 626 satin chrome, 628 aluminum, 643E aged bronze, 710 dark bronze anodized and 711 flat black. 626 and 628 are the two that usually match existing institutional hardware; 613 and 711 are the ones to pick when you're matching newer architectural specs.
26) Which concealed vertical rod devices are available in a wide stile version from the same family logic as the BEST Precision 2601?
Within the BEST Precision line, the 2601 Series is a narrow stile exit only non-handed concealed vertical rod device, the 2701 Series is wide stile reversible for wood doors, and the 2801 Series is a wide stile concealed vertical rod device. The Von Duprin 3548A-3ft sits on the narrow stile side and is non-handed, so the 2601 is the closest on stile and handing while the 2701 is the one specifically called out for wood doors.
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Does the Von Duprin 3548AEO 3 US26D come with a warranty?
Absolutely. The Von Duprin 3548AEO 3 US26D is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
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