Von Duprin 3547A-4ft Concealed...
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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

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Model: 3547AEO 4 US26D
$4,094.58
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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.

Manufacturer Resources

Von Duprin 88 Series Catalog

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:
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

Von Duprin 3547AEO 4 US26D – Frequently Asked Questions

1) Will the Von Duprin 3547A concealed vertical rod exit device fit a narrow stile aluminum storefront door?
Yes. The 3547A is a narrow stile device and goes on aluminum stiles as narrow as 2-1/8 inches (44 mm). On wood doors the stile has to be at least 4 inches (102 mm). Door thickness is 1-3/4 inches, so it is a single-thickness device, not a range. If your stile is narrower than 2-1/8 inches, no concealed vertical rod device is going to work on that opening.
2) Do I need to specify handing when ordering a Von Duprin 3547A concealed vertical rod device?
The device itself is non-handed, except when the SS signal switch option is used. The order form still asks for RHR or LHR because the trim and switch packages are built to a hand, so pick the one that matches your door. If you are ordering exit only with no switch, the hand is not changing the mechanism.
3) Will a concealed vertical rod exit device secure a pair of doors without a center mullion?
That is exactly what a concealed vertical rod device is for. The 3547A latches at the head and at the threshold rather than into a strike on the jamb, so a pair of doors latches to each other and the frame with no center mullion in the opening. If you would rather keep a mullion and a clear door face, a rim device on a removable mullion is the simpler install, because concealed rods have to be routed into the door and the door has to be prepped for them. Concealed rod is the choice when you want the hardware hidden and the clear opening unobstructed.
4) What does the Less Bottom Rod option on the Von Duprin 3547A actually change?
Less bottom rod drops the bottom latch, so the device only latches at the head. That is the common call where the floor is uneven, the threshold is wet or dirty, or the bottom bolt keeps hanging up on carpet. In exchange you lose the bottom point of security. If you go less bottom rod and want an electric strike at the head, order the ES top Pullman latch, which is built for that application and is only offered with less bottom rod. With both rods you can order PL top and PL bottom Pullman latches instead.
5) Will the Von Duprin 3547A latch into the strike I already have on my door?
The latch throw is 3/4 inch and the bottom bolt throws 5/8 inch. Because it latches vertically at the head and floor rather than into the jamb, the existing strike prep matters less than the head and threshold prep. Device centerline sits 39-13/16 inches off the finished floor, so if you are replacing an older device you want that centerline to line up with the existing push pad cutout or you will be patching the door face.
6) Can I hold the doors open during business hours with the Von Duprin 3547A?
Yes, three ways to specify it. Hex key dogging is the default, so a maintenance person with the hex wrench can depress and hold the pad to leave the door push-pull during the day. Cylinder dogging (CD) lets you dog it with a key instead, which is what you want when the public can reach the device or you are keying the building to one system. Less dogging (LD) removes the feature entirely.
7) Can the Von Duprin 3547A be tied into an access control system?
It can. For signalling, you can order RX request to exit, LX latchbolt monitor, LX-RX combined, RX2 double request to exit, or WP-RX for a waterproof application. For remote unlocking, order EL electric latch retraction, QEL quiet electric latch retraction, or PN pneumatic. There are also alarm kits (ALK, RX-ALK, LXRX-ALK) and CDSI/HDSI security dogging indicators. Note the device is non-handed except with the SS signal switch, so a switch option is where handing starts to matter.
8) Is the Von Duprin 3547A ADA compliant for opening force?
Only if you order the AX accessible device option, which is certified to meet the 5 lb force requirement under 2010 ADA chapters 404.2.7 and 30934, and the 2013 California Building Code chapter 11B-309.4. AX is a yes/no choice at order time, so it is not on the device by default. If the opening is on an accessible route, specify AX.
9) Do I get outside trim with the Von Duprin 3547A, or is that a separate order?
Trim is a choice you make on the order, and it is what decides how the door behaves from the outside. Options run exit only (EO), lever (L, L-BE, L-DT), night latch (NL, NL-OP), thumbturn (T, T-BE, TL, TL-BE), and dummy trim (DT). The device supports 360 lever/thumbpiece trim in Classroom, Passage and Dummy functions, 386 pull trim in Storeroom and Dummy, and 388 optional pull trim in Storeroom. If you pick an L trim, you also pick the lever design: 01, 02, 03, 05, 06 (default), 07, 17 or 18.
10) What else could I buy instead of the Von Duprin 3547A for a narrow stile aluminum door?
Several narrow stile concealed vertical rod devices cover the same application. The Corbin Russwin ED4800 is the closest straight equivalent: Grade 1, narrow stile, 1-3/4 inch door thickness, exit only and accepts trim. The Adams Rite 8600 Series is narrow stile, Grade 1, non-fire-rated, and built for aluminum doors. The DORMA 9600BB is a Grade 1 narrow stile pushpad device with a wider 1-3/4 to 2-1/4 inch thickness range, which matters if your doors are thicker than 1-3/4. If you want a crossbar instead of a push pad, the Corbin Russwin ED7800 is narrow stile Grade 1 with a crossbar.
11) What is the closest narrow stile concealed vertical rod alternative to the Von Duprin 3547A if I need a fire label on the opening?
The 3547A itself is not a fire rated device, so a labeled opening needs a different part. Among concealed vertical rod devices, the Adams Rite 3600 Series and the Adams Rite 3900 Series are both Grade 1 and fire rated, and the 3900 Series carries a 1-1/2 hour rating; both are wide stile devices built for hollow metal doors. The Sargent 12-MD8613 is also Grade 1 and fire rated, wide stile, in classroom function. If the door is a narrow aluminum stile, those fire rated peers will not fit the stile, and the opening has to be resolved with a wide stile door or a labeled narrow stile device.
12) What narrow stile concealed vertical rod device should I look at instead of the Von Duprin 3547A if the aluminum doors are thicker than 1-3/4 inch?
The Von Duprin 3547A is specified for 1-3/4 inch doors. When the leaf runs thicker, the DORMA 9600BB Series is the narrow stile pushpad concealed vertical rod device to look at: Grade 1, heavy duty, non-fire rated, covering 1-3/4 inch to 2-1/4 inch door thickness. It is catalogued at 36 inches, so device length has to be confirmed against the opening.
13) What is a direct Grade 1 narrow stile concealed vertical rod equivalent to the Von Duprin 3547A?
The Von Duprin 3547A is a Grade 1 concealed vertical rod device for narrow stile doors, 1-3/4 inch thick. The Corbin Russwin ED4800 is the closest match on those points: Grade 1, narrow stile, 1-3/4 inch door thickness, exit only and accepts trim. The Falcon 1990EO is also Grade 1 narrow stile at 1-3/4 inch but is exit only, so it covers an opening with no outside trim. The Falcon 24-C Series is another Grade 1 narrow stile exit only device at the same door thickness.
14) Is the Adams Rite 8600 a like-for-like alternative to the Von Duprin 3547A on aluminum storefront doors?
They line up closely on the points that decide the opening. The Adams Rite 8600 Series is a Grade 1 narrow stile concealed vertical rod exit device for aluminum doors and is not fire rated; the Von Duprin 3547A is Grade 1, narrow stile and also non-fire rated. Both are aimed at aluminum storefront work. Trim, dogging and finish selection differ between the two lines, so the outside function and finish have to be picked on the alternative rather than carried across.
15) How much does the Von Duprin 3547A device stick out from the door face?
Projection is 3-13/16 inches, and the center case measures 8-3/16 x 1-9/16 x 2-13/32 inches. That projection is what you check against a door that swings into a tight vestibule or past an adjacent wall, and against any pull or gate on the push side.
16) I need 15 second delayed egress on a stairwell door. Does the Von Duprin 3547A do that?
Yes, with the CX CHEXIT upgrade, which meets NFPA and IBC requirements for delayed egress. Push the pad and the door stays secure for 15 seconds while a nuisance alarm sounds, then releases. That is a specified-at-order upgrade on the concealed vertical rod device, not something you bolt on after the fact.
17) Are mounting fasteners included with the Von Duprin 3547A exit device?
Yes. It ships with 1-3/4 inch and 2-1/4 inch wood/metal door fasteners, plus SNB (sex nut and bolt) hardware for through-bolting. What is not in the box is the trim, the cylinder if you order CD cylinder dogging or a keyed trim function, and any power supply or wiring for an EL, QEL or switch option.
18) What is a Grade 1 exit device and is the 3547A durable enough for a school corridor?
The 3547A is certified to ANSI/BHMA A156.3 2014 Grade 1, which is the top of the three commercial grades for exit devices and the one written for high use and abuse openings. That is the grade you want on school, hospital and government corridor doors where the device is cycled constantly. It is a commercial-duty device, not a light residential one.
19) I only need a push-to-exit device with no outside operation. Is the Von Duprin 3547A overkill?
Not overkill, just specify the EO exit only trim function and skip the lever, switch and latch retraction options. If you want a simpler exit-only device from the start, the BEST Precision 2601 is a narrow stile non-handed concealed vertical rod exit-only device, and the Falcon 1690EO, 1990EO and 24-C are all narrow stile Grade 1 exit only at 1-3/4 inch thickness. The CRL Jackson 1085 and 1285 are exit only as well. Where the 3547A earns its keep is when you later want to add trim, dogging indicators, or electric latch retraction on the same opening.
20) I am standardizing a school on push pad exit devices - which concealed vertical rod devices besides the Von Duprin 3547A use a push pad rather than a crossbar?
The 3547A is a push pad device. Among concealed vertical rod peers, the DORMA 9100 Series and the DORMA 9600BB Series are both pushpad devices, wide stile and narrow stile respectively, and the CRL Jackson 1285 is a push pad concealed vertical rod panic exit that covers narrow, medium or wide stile. The Corbin Russwin ED7800 is the one to keep out of a push pad standard - it is a narrow stile crossbar device.
21) I need a 48 inch concealed vertical rod device for a wide storefront leaf - what are the options next to the Von Duprin 3547A-4ft?
The Von Duprin 3547A-4ft is a 48 inch narrow stile device. For a 48 inch wide stile leaf, the CRL Jackson 1085 Series is a 48 inch non-handed concealed vertical rod panic exit device in exit only function. Both are non-handed, so neither has to be ordered by hand of door; the difference is the stile the device is designed to sit on and the fact that the 1085 is exit only where the 3547A takes lever, night latch and thumbturn trim.
22) The opening needs a matching inactive leaf with no working latch - is the Von Duprin 3547A the right part?
Not for a pure dummy application on its own. The 3547A is a working Grade 1 concealed vertical rod device with a 3/4 inch latch throw, though it can be ordered with DT dummy trim on the outside. If the leaf needs a device that matches visually and does not latch at all, the Falcon 1491DT is a narrow stile concealed vertical rod device in dummy function with a 9970 pull, Grade 1, 1-3/4 inch door thickness, at 42 inches.
23) I need a classroom function concealed vertical rod device - does the Von Duprin 3547A cover it or should I look at Sargent?
The 3547A supports classroom function through 360 lever trim, and it is ordered with a lever trim function including L and L-BE. If the opening is a labeled wide stile metal door, the Sargent 12-MD8613 is a Grade 1 concealed vertical rod device in classroom function with a fire rating. The Sargent MD8613F-LTRIM is a Grade 1 heavy duty concealed vertical rod device for metal doors at 36 by 84 inches with hex dogging, which matches the hex key dogging the 3547A uses as its default.
24) For wood doors, is the Von Duprin 3547A the right concealed vertical rod device or is there a better fit?
The 3547A accommodates wood door stiles as narrow as 4 inches and ships with 1-3/4 inch and 2-1/4 inch wood and metal door fasteners plus SNB, so it does go on wood. If the wood door is a wide stile leaf, the BEST Precision 2701 Series is a wide stile reversible concealed vertical rod device made for wood doors, and the BEST Precision 2801 Series is another wide stile concealed vertical rod option.
25) What finishes does the Von Duprin 3547A concealed vertical rod device come in?
Ten, and they cover both the brass/bronze and the aluminum storefront palettes: 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. On an aluminum storefront, 628 and 710 are the two that normally match the existing frame; 711 flat black matches a black anodized or painted system.
26) I need a matching inactive leaf with no working device. What do I order?
Order the DT dummy trim function, which gives you the same push pad appearance with no latching mechanism, so the inactive leaf of a pair matches the active one. L-DT pairs a lever with dummy trim if the outside needs to look the same too. The Falcon 1491DT narrow stile dummy device with a 9970 pull is another route if you want a separate dummy unit.
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Does the Von Duprin 3547AEO 4 US26D come with a warranty?
Absolutely. The Von Duprin 3547AEO 4 US26D is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
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