Name: Von Duprin 3547A-3ft Concealed Vertical Rod Exit Device, 3 ft Smooth Case Narrow Stile, Grade 1
Brand: Von Duprin
SKU: 3547AEO 3 US26D
Price: 3846.42 USD
Availability: InStock

Product Overview
FAQs

Von Duprin 3547A-3ft Concealed Vertical Rod Exit Device | 3 ft Smooth Case Narrow Stile, Grade 1

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

The Von Duprin 3547A-3ft is a 3-foot, smooth mechanism case, narrow stile concealed vertical rod exit device engineered for demanding commercial and institutional environments. Designed to fit door stiles as narrow as 2-1/8" (44 mm) for metal doors and as narrow as 4" (102 mm) for wood doors, this device accommodates a 36" door size and features a 3/4" latch throw with a door thickness range of 1-3/4". Certified to ANSI/BHMA A156.3 2014 Grade 1 standards and UL listed for panic exit hardware, the 3547A is non-handed (except when the SS signal switch option is used), making it highly versatile for single and double door applications. The device centerline is positioned at 39-13/16" from finished floor, and its one-piece center case cover provides a clean, architectural appearance suited to schools, hospitals, and government buildings.

Professional Features & Benefits

Narrow Stile Compatibility: Fits metal door stiles as narrow as 2-1/8" (44 mm) and wood door stiles as narrow as 4" (102 mm), enabling installation on a wide range of door configurations.
36" Door Size Coverage: Designed for a 36" product size with a device centerline at 39-13/16" from finished floor, ensuring proper alignment and code-compliant placement.
Smooth Mechanism Case: The 3547A features a smooth mechanism case (as distinguished from the grooved case of the 3347A), providing a refined architectural appearance for upscale commercial environments.
ANSI/BHMA Grade 1 Certified: Meets ANSI/BHMA A156.3 2014 Grade 1 standards, ANSI/UL 10C (fire-rated configurations), ANSI/UL 305, CAN/ULC-S104 (fire-rated configurations), and CAN/ULC-S132 for the highest level of industry-recognized performance.
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.
Hex Key Dogging Configuration: Equipped with hex key dogging for straightforward hold-open functionality in appropriate applications.
Retrofit and Upgrade 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 integration with access control systems.
AX and CX Upgrade Availability: Upgradeable to AX (ADA-certified, meeting 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 with 15-second delay and nuisance alarm).
Comprehensive Fastener Inclusion: Includes 1-3/4" and 2-1/4" wood/metal door fasteners with SNB included for versatile installation.
Broad Trim and Function Compatibility: Compatible with 360 (lever/thumbpiece), 386 (pull trim), and 388 (optional pull trim) trim series, with functions including Classroom, Passage, Dummy, Exit Only, and Storeroom.

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 Medical Centers)
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 3547A-3ft certified to ANSI/BHMA A156.3 2014 Grade 1 and listed under ANSI/UL 305 and CAN/ULC-S132 for dependable panic exit performance. The smooth mechanism case, one-piece center case cover, and narrow stile design â€” accommodating stiles as narrow as 2-1/8" â€” reflect the precision construction demanded by institutional applications in schools, hospitals, and government facilities. With a broad ecosystem of retrofit kits, trim options, and upgrade paths including ADA-compliant AX and delayed egress CX configurations, Von Duprin delivers the flexibility and long-term value that commercial door hardware professionals rely on.

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
Tags:: von duprin 3547a, von duprin 3547a, von duprin 3547, von duprin 3547a eo, von duprin 3547a, von duprina nl op, 3547a, 3547a von duprin
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 3547AEO 3 US26D – Frequently Asked Questions

1) Will the Von Duprin 3547A fit a narrow stile aluminum storefront door?

Yes. The 3547A concealed vertical rod device is built for narrow stile openings and fits metal door stiles as narrow as 2-1/8 inches (44 mm). On wood doors the minimum stile is 4 inches (102 mm). Door thickness is a single value: 1-3/4 inches, so it is not an option on thicker doors. If your stile is wider and you would rather buy to that, the Corbin Russwin ED5800 is a wide stile concealed vertical rod at the same Grade 1 level, also 1-3/4 inch door thickness.

2) Do I need to specify handing on a Von Duprin 3547A concealed vertical rod device?

The device itself is non-handed, so one part covers both leaves of a pair. The one exception is the SS signal switch option, which is handed. Handing is still selected on the order (RHR or LHR) because trim and switch orientation follow the door, so know which way your door swings before you order.

3) What is the Less Bottom Rod option on the Von Duprin 3547A and when should I order it?

Less Bottom Rod deletes the bottom rod and bottom latch, so the device latches only at the head. Order it where the floor is the problem: dirt, snow, carpet, uneven thresholds, or an out of level slab that keeps chewing up a bottom latch. It is the standard fix for exterior openings and high-traffic doors. Note that the ES top pullman latch, for electric strike applications, is only available with the Less Bottom Rod option.

4) Will the 3547A latch into my existing strikes, or do I need new ones?

The latch throw is 3/4 inch, top and bottom. Concealed vertical rod devices use their own top and bottom strikes rather than a jamb strike, and the 3547A is shown with a 338 top strike and 385A bottom strike. If you are replacing another brand's concealed rod device, plan on the matching Von Duprin strikes and verify the head and threshold prep, because strike geometry between manufacturers does not interchange as a rule.

5) What outside trim function do I order with the 3547A for a classroom or a storefront entry?

Trim function is a separate selection and covers eleven choices: EO exit only, L lever, L-BE lever with blank escutcheon, L-DT lever with dummy trim, NL night latch, NL-OP night latch with optional pull, T thumbturn, T-BE thumbturn with blank escutcheon, TL thumbturn and unlocks, TL-BE, and DT dummy trim. For a storefront that staff unlock with a key, NL or NL-OP is the usual pick. For a classroom or office where outside access is by lever, take an L function and pick your lever design (01, 02, 03, 05, 06, 07, 17 or 18). EO leaves the outside blank, which is what you want on a stair or exit-only leaf.

6) Does the Von Duprin 3547A meet ADA opening force requirements?

Only in the AX configuration, which is a selection on the order. AX is ADA certified to the 5 lb force requirement per 2010 ADA Chapters 404.2.7 and 30934 and 2013 California Building Code Chapter 11B-309.4. If accessibility is on your drawings, take AX = Yes rather than assuming the standard device qualifies.

7) Can the 3547A be tied into an access control system with request-to-exit or electric latch retraction?

Yes, and the switch and latch retraction options are chosen at order time. Switches: RX request to exit, LX latchbolt monitor, LX-RX combination, RX2 double RX, WP-RX waterproof, plus alarm kits ALK, RX-ALK and LXRX-ALK. Latch retraction: EL electric, QEL quiet electric, or PN pneumatic. QEL is the one to specify where noise matters, such as a hospital corridor or a library. Bear in mind the SS signal switch is the one option that makes the device handed.

8) Is the Von Duprin 3547A Grade 1 and UL listed for panic hardware?

Certified to ANSI/BHMA A156.3 2014 Grade 1, and listed under ANSI/UL 305 and CAN/ULC-S132 for panic exit hardware. That is the certification set an institutional spec normally calls for on a non-labeled egress door. It is not a fire exit device.

9) The opening needs a fire-rated concealed vertical rod exit device - what should I use instead of the Von Duprin 3547A?

The 3547A is a non-fire-rated concealed vertical rod device, so a fire-rated opening needs a different part. The Adams Rite 3600 Series is a fire-rated Grade 1 wide stile concealed vertical rod device for hollow metal doors, and the Adams Rite 3900 Series is a fire-rated Grade 1 wide stile concealed vertical rod device carrying a 1-1/2 hour rating. For a fire-rated classroom function device, the Sargent 12-MD8613 is a Grade 1 wide stile concealed vertical rod device in classroom function with a fire rating. All three are wide stile, so confirm the door stile will take them - the 3547A is the narrow stile device.

10) What is the closest narrow stile concealed vertical rod equivalent to the Von Duprin 3547A from another manufacturer?

The Von Duprin 3547A is a narrow stile concealed vertical rod device certified to ANSI/BHMA Grade 1 for a 36 inch door at 1-3/4 inch thickness. The closest cross-brand match is the DORMA 9600BB, a 36 inch non-fire-rated Grade 1 narrow stile concealed vertical rod pushpad device with a door thickness range of 1-3/4 inch to 2-1/4 inch. Both are pushpad devices; the 3547A is fixed to 1-3/4 inch doors while the 9600BB covers thicker leaves as well. The Corbin Russwin ED4800 is another Grade 1 narrow stile concealed vertical rod device at 1-3/4 inch door thickness, offered exit only and accepting trim.

11) My door has a wide stile - can I still use the Von Duprin 3547A, or do I need a different device?

The 3547A is the narrow stile device in the 33/35 Series, sized for stiles as narrow as 2-1/8 inch on metal doors and 4 inch on wood. On a wide stile leaf, the Corbin Russwin ED5800 is a Grade 1 wide stile concealed vertical rod device at 1-3/4 inch door thickness that is exit only and accepts trim, and the DORMA 9100 Series is a Grade 1 heavy duty wide stile pushpad concealed vertical rod device covering 1-3/4 inch to 2-1/4 inch doors. The BEST Precision 2701 is a wide stile reversible concealed vertical rod device intended for wood doors.

12) What door width does the 3-foot Von Duprin 3547A cover, and how high does it mount?

It is sized for a 36 inch door. Mounting height is fixed by the device centerline at 39-13/16 inches from finished floor, which is where you set your layout line before drilling. Projection off the door face is 3-13/16 inches, so check clearance against anything in the swing path such as a wall-mounted operator or an adjacent leaf.

13) Should I choose a concealed vertical rod or a surface vertical rod exit device for a pair of doors?

A concealed vertical rod device like the 3547A runs the rods inside the door, latching at the head and the threshold, so a pair of doors is secured with no center mullion and nothing exposed on the door face. That requires a door prepped for concealed rods, either factory or field. Surface rod devices bolt to the face of the door and can go on doors that were never prepped, at the cost of appearance and exposed hardware. If the appearance matters (schools, hospitals, government lobbies) and the doors are prepped, concealed is the reason to buy this one.

14) How does the Von Duprin 3547A differ from the 3347A?

Mechanically they are the same family; the difference is the mechanism case. The 3547A has a smooth mechanism case, the 3347A a grooved one. If you are matching existing devices on other openings in the building, look at the case on what is already installed and match it, because the two do not look alike side by side on a run of doors.

15) Can I dog the Von Duprin 3547A open during business hours, and what dogging options are there?

Standard is hex key dogging, and the hex key ships with the device. Three choices on the order: hex key dogging, CD cylinder dogging if you want to dog it with a key rather than an allen wrench (worth it where staff dog and undog the door daily), or LD less dogging where the application does not permit hold-open.

16) Do I need to order fasteners separately for the 3547A, or are they in the box?

Fasteners are included: 1-3/4 inch and 2-1/4 inch wood/metal door fasteners with SNB (sex nuts and bolts). The hex dogging key is included as well. What is not in the box is the outside trim, which is a separate selection, and the rods and strikes for the specific door height.

17) Can I add security dogging indication or delayed egress to the 3547A later?

Both are available. CDSI and HDSI security dogging indicators tell staff at a glance whether the device is dogged, which is the point on a lockdown-capable school opening. CX is the CHEXIT delayed egress configuration, meeting NFPA and IBC requirements with a 15-second delay and nuisance alarm, for openings where you need to slow an unauthorized exit. QEL quiet electric latch retraction is also part of the same option set.

18) I only need push-to-exit with no outside trim - is there a simpler concealed vertical rod device than the Von Duprin 3547A?

The 3547A is built to take a range of outside trim functions including lever, night latch, thumbturn and dummy, which is more device than an opening that only needs egress. For exit only, the Falcon 24-C is a Grade 1 narrow stile concealed vertical rod device in exit only function for a 36 inch door at 1-3/4 inch thickness, and the Falcon 1690EO is a 3 ft narrow stile Grade 1 concealed vertical rod device in exit only at the same door thickness. The BEST Precision 2601 is a narrow stile non-handed concealed vertical rod device in exit only as well. Choose the 3547A when outside trim may be added later.

19) Is the Corbin Russwin ED7800 a direct substitute for the Von Duprin 3547A?

They are not interchangeable in appearance or operation. The ED7800 is a Grade 1 narrow stile concealed vertical rod device with a crossbar actuator that is exit only and accepts operator trim, at 1-3/4 inch door thickness. The 3547A uses a push pad. On a run of doors where the actuators need to match, a crossbar device beside a push pad device will read as two different openings. If a push pad is required, the Corbin Russwin ED4800 is the narrow stile Grade 1 concealed vertical rod device in that line at the same 1-3/4 inch door thickness.

20) What is the difference between the Von Duprin 3547A and the Adams Rite 8600 for an aluminum storefront door?

Both are non-fire-rated Grade 1 narrow stile concealed vertical rod devices. The Adams Rite 8600 Series is specified for aluminum doors. The Von Duprin 3547A fits metal stiles as narrow as 2-1/8 inch and wood stiles as narrow as 4 inch, is non-handed except with the SS signal switch option, and comes in ten finishes from 605 bright brass through 711 flat black, with a less bottom rod option. Confirm the stile dimension on the storefront leaf before committing to either.

21) Which concealed vertical rod devices besides the Von Duprin 3547A come with hex key dogging?

The 3547A ships with hex key dogging standard, with cylinder dogging and less dogging also available. The Sargent MD8613F-LTRIM is a Grade 1 heavy duty concealed vertical rod device for 36 inch by 84 inch metal doors specified with hex dogging. On an institution that dogs doors open during business hours, matching the dogging method across the building keeps one tool on the maintenance ring.

22) I have a mix of narrow, medium and wide stile doors - can one concealed vertical rod device cover all of them instead of the Von Duprin 3547A?

The 3547A is the narrow stile device, fitting metal stiles as narrow as 2-1/8 inch and wood stiles as narrow as 4 inch. The CRL Jackson 1285 push pad concealed vertical rod panic device is specified for narrow, medium or wide stile and is exit only. For openings in that mix that need outside trim, the 3547A takes lever, night latch, thumbturn and blank escutcheon functions, so a facility may end up with the 1285 on egress-only leaves and the 3547A where trim is required.

23) The Adams Rite 8500 came up as a substitute for the Von Duprin 3547A - is it?

Not for the same opening. The Adams Rite 8500 Series is a non-fire-rated Grade 1 concealed vertical rod device, but it is a wide stile device for hollow metal doors. The 3547A is a narrow stile device fitting metal stiles as narrow as 2-1/8 inch. The two share the concealed vertical rod configuration and the Grade 1 certification, which is why they read as alternates on paper, but the stile prep decides it. For a wide stile hollow metal leaf the 8500 applies; for a narrow stile leaf it does not.

24) Do I need the Von Duprin 3547A for a classroom function opening, or is there another concealed vertical rod device in that function?

The 3547A supports classroom function among its trim options and is non-fire-rated. The Sargent 12-MD8613 is a Grade 1 wide stile concealed vertical rod device supplied in classroom function with a fire rating, which is the one to specify when the classroom opening is in a rated wall. On a non-rated narrow stile classroom leaf, the 3547A applies at 1-3/4 inch door thickness with a 3/4 inch latch throw.

25) What finishes does the Von Duprin 3547A come in for matching existing hardware across a building?

Ten finishes: 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 a standardization program, 626 satin chrome and 628 aluminum are the usual institutional picks and 710 or 711 the ones that match dark storefront framing.

26) Is the 3547A push pad or crossbar, and does that matter for a school?

Push pad. The whole active width is the actuator, which is what you want in a school or any high-traffic corridor where people hit the device with a hip or an elbow rather than a hand. If your specification calls for a crossbar instead, the Corbin Russwin ED7800 is a Grade 1 narrow stile crossbar concealed vertical rod device at the same 1-3/4 inch door thickness.

27) The inactive leaf of a pair only needs to look like the active one - is the Von Duprin 3547A the right choice?

The 3547A is a working panic device with top and bottom latching, and it does offer DT dummy trim and L-DT lever with dummy trim configurations. Where the leaf needs only the appearance of a device and no latching, the Falcon 1491DT is a 42 inch narrow stile dummy trim concealed vertical rod device with a 9970 pull, Grade 1, for 1-3/4 inch doors. Match the actuator and finish across the pair so the two leaves read together.

28) For a wide stile wood door, what concealed vertical rod device works where the Von Duprin 3547A does not?

The 3547A fits wood door stiles as narrow as 4 inch but is a narrow stile device. On wide stile wood leaves the BEST Precision 2701 is a wide stile reversible concealed vertical rod device specified for wood doors, and the BEST Precision 2801 is a wide stile concealed vertical rod device in the same family. Both differ from the 3547A in stile class, so the rod and strike prep in the leaf will not carry across.

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Does the Von Duprin 3547AEO 3 US26D come with a warranty?

Absolutely. The Von Duprin 3547AEO 3 US26D is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.

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Von Duprin 3547A-3ft Concealed Vertical Rod Exit Device, 3 ft Smooth Case Narrow Stile, Grade 1

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