Von Duprin 3547AF-4ft Fire Rat...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$3,993.00
$2,873.83
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

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Model: 3547AEO-F 4 US26
$3,993.00
$2,873.83
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In Stock (leaves warehouse same day if ordered before 3pm ET)

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$2,873.83
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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.

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"
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

Von Duprin 3547AEO-F 4 US26 – Frequently Asked Questions

1) Will the Von Duprin 3547AF fit a narrow stile aluminum storefront door?
Yes. The 3547AF concealed vertical rod device fits aluminum 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 1-3/4 inches, so it is a standard commercial thickness device rather than a range.
2) Is the 3547AF fire rated, and what grade is it?
Fire rated, listed under ANSI/UL 10C and CAN/ULC-S104, and certified to ANSI/BHMA A156.3 2014 Grade 1. That combination is what a school, hospital, or government facility spec normally calls for on a rated egress opening. Note it ships less dogging, which is correct for a fire rated device since mechanical dogging is not permitted on fire doors.
3) Do I need to specify handing for the Von Duprin 3547AF?
The device itself is non-handed, with one exception: if you order the SS signal switch option, handing matters. Handing is still a required selection when ordering (RHR or LHR) because trim and switch prep depend on it.
4) Will the 3547AF latch into the strikes already in my frame?
The latch throw is 3/4 inch and the device projects 3-13/16 inches off the door face. Concealed vertical rod devices use their own top and bottom strike prep, so unless you are replacing another CVR device of the same series the frame head and threshold will need the Von Duprin prep. Von Duprin publishes hollow metal and wood door template indexes as well as trim and strike template indexes for this style of device, and those are the drawings to hand the door shop.
5) My doors are wide stile, not narrow stile. What fire rated concealed vertical rod device should I look at instead?
The 3547AF is a narrow stile device, so on a wide stile door you want a wide stile CVR. Fire rated wide stile options include the Adams Rite 3600 Series and 3900 Series (the 3900 carries a 1-1/2 hour rating), both Grade 1, and the Sargent 12-MD8613, a Grade 1 fire rated classroom function CVR. The Corbin Russwin ED5800 is a Grade 1 wide stile CVR for 1-3/4 inch doors.
6) Which concealed vertical rod exit devices should I use on a wide stile door instead of the 3547AF?
The Von Duprin 3547AF-4ft is built for narrow stile openings, so on a wide stile door look at the Corbin Russwin ED5800, a Grade 1 wide stile concealed vertical rod device for 1-3/4 inch doors, or the DORMA 9100 Series, a Grade 1 heavy duty wide stile pushpad concealed vertical rod device covering 1-3/4 inch to 2-1/4 inch doors. For a fire rated wide stile opening, the Adams Rite 3600 Series and 3900 Series are both Grade 1 fire rated wide stile concealed vertical rod devices.
7) What is the closest narrow stile Grade 1 concealed vertical rod alternative to the Von Duprin 3547AF?
The Corbin Russwin ED4800 is the nearest match in configuration: a Grade 1 narrow stile concealed vertical rod exit device for 1-3/4 inch doors, available exit only or set up to accept trim. The Von Duprin 3547AF-4ft is likewise Grade 1, narrow stile, and specified for 1-3/4 inch doors, with a 48 inch device length and a 3/4 inch latch throw. The practical difference is the trim program: the 3547AF is ordered with a trim function selected up front, including EO exit only, L lever, NL night latch, and thumbturn variants.
8) What door width does the 4 ft 3547AF cover, and where does the push pad sit on the door?
It is a 48 inch device, and the mechanism centerline sets at 39-13/16 inches from the finished floor. Use that dimension when you are matching push pad height across a bank of existing openings so the new leaf lines up with the rest.
9) Should I use a concealed vertical rod device or a rim device with a mullion on a pair of doors?
A concealed vertical rod like the 3547AF latches into the head and the threshold, so a pair of doors works with no center mullion and you get a clear opening for carts, beds, and furniture. The rods and 5/8 inch bottom bolt hide inside the door, which is why it is specified where appearance matters. A rim device plus removable mullion is cheaper to install and easier to service, but you lose the clear opening and someone has to pull the mullion. Choose the concealed rod when the clear width or the clean look is the requirement.
10) Can I order the 3547AF less bottom rod to avoid the floor strike?
Yes, less bottom rod is an ordering option. LBR drops the bottom rod and floor strike, which is what you want where the floor is uneven, carpeted, or the strike keeps collecting dirt. On a fire rated opening confirm the LBR build is acceptable for your rating with the door manufacturer, since LBR normally requires an auxiliary fire pin arrangement.
11) What trim functions can I get with the Von Duprin 3547AF?
Ten trim functions are available: exit only (EO), night latch (NL), night latch with optional pull (NL-OP), lever (L), lever with blank escutcheon (L-BE), thumbturn (T), thumbturn with blank escutcheon (T-BE), thumbturn and unlocks (TL), TL with blank escutcheon (TL-BE), and dummy trim (DT). If you pick an L trim you also select the lever design: 01, 02, 03, 05, 06, 07, 17, or 18.
12) Can the 3547AF be tied into an access control system?
Yes. Electric latch retraction is available as EL, QEL quiet electric latch retraction, or PN pneumatic, which lets the device latch be pulled back on a card read or scheduled unlock. For monitoring you can add RX request-to-exit, LX latchbolt monitor, LX-RX combined, RX2 double request-to-exit, or WP-RX waterproof. Alarm kits are available as ALK, RX-ALK, and LXRX-ALK. CDSI and HDSI security dogging indicators are also field-configurable options.
13) What is the difference between the Von Duprin 3547A and the 3347A?
Case shape. The 3547A has a smooth mechanism case, the 3347A has a grooved case. Both are 33/35 Series narrow stile devices; the 47 in the model number is the concealed vertical rod configuration with a 5/8 inch bottom bolt. Pick the one that matches the other openings in the building so the elevation reads consistently.
14) What else do I need to buy to install the 3547AF on a metal or wood door?
Mounting hardware is in the box: 1-3/4 inch and 2-1/4 inch wood and metal door fasteners plus sex nut and bolt (SNB) hardware for through-bolting. What you specify separately is the trim function and, if you are running electrified options, the power supply and wiring to the door.
15) What is a simpler exit only concealed vertical rod device if I do not need lever trim?
If the opening only needs egress with no outside operation, the Falcon 24-C Series is a Grade 1 narrow stile concealed vertical rod device supplied exit only at 36 inches for 1-3/4 inch doors, and the Falcon 1690EO is a Grade 1 narrow stile exit only device in a 3 ft length. The BEST Precision 2601 Series is another narrow stile concealed vertical rod exit only device and is non-handed. The Von Duprin 3547AF-4ft can also be ordered in an EO exit only trim function, and is itself non-handed.
16) Is a crossbar concealed vertical rod device available instead of the push pad 3547AF?
Yes. The Corbin Russwin ED7800 is a Grade 1 narrow stile crossbar concealed vertical rod exit device for 1-3/4 inch doors, supplied exit only or to accept operator trim. The Von Duprin 3547AF-4ft uses a push pad actuator rather than a crossbar, so the choice comes down to the look and feel the architect specified rather than the latching arrangement.
17) I need a classroom function fire rated concealed vertical rod device. Does the 3547AF cover that?
The Von Duprin 3547AF-4ft is fire rated and Grade 1, and its trim functions run EO exit only, L lever, L-BE lever with blank escutcheon, NL night latch, NL-OP, thumbturn and thumbturn-and-unlock variants, and DT dummy trim. If the spec calls out classroom function specifically, the Sargent 12-MD8613 is a fire rated Grade 1 concealed vertical rod exit device supplied in classroom function.
18) What concealed vertical rod exit device works on wood doors?
The BEST Precision 2701 Series is a wide stile reversible concealed vertical rod exit device built for wood doors. The Von Duprin 3547AF-4ft is a narrow stile device and ships with 1-3/4 inch and 2-1/4 inch wood and metal door fasteners plus SNB sex nuts and bolts, so it covers wood door installations where the stile is narrow; Von Duprin also publishes separate wood door prep and wood door trim and strike template indexes for laying out the prep.
19) Is the BEST Precision 2801 a drop-in replacement for the 3547AF?
Not on a narrow stile opening. The BEST Precision 2801 Series is a wide stile concealed vertical rod exit device, while the Von Duprin 3547AF-4ft is narrow stile and fits the slim aluminum and narrow wood stiles those openings use. Within the BEST Precision line, the 2601 Series is the narrow stile concealed vertical rod device.
20) Does the Sargent MD8613F with L trim do the same job as a 3547AF with lever trim?
Both provide concealed vertical rod latching with outside lever trim. The Sargent MD8613F-LTRIM is a Grade 1 heavy duty concealed vertical rod device set up for metal doors at 36 by 84 inches and includes hex dogging. The Von Duprin 3547AF-4ft is a 48 inch Grade 1 narrow stile device ordered less dogging, with L lever or L-BE lever with blank escutcheon trim functions and a choice of lever designs including 01, 02, 03, 05, 06, 07, 17 and 18.
21) What finishes does the Von Duprin 3547AF come in for matching existing hardware?
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 aluminum storefront, 628 and 710 are the usual matches to the frame; 626 is the common institutional standard alongside existing lever hardware.
22) Is the 3547AF available as an accessible device for lower operating force?
Yes, AX accessible device is a required yes/no selection when ordering. The AX option reduces the force needed to operate the push pad, which is what you specify on openings that have to meet accessibility operating force requirements.
How fast can I get the Von Duprin 3547AEO-F 4 US26 delivered?
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Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Von Duprin 3547AEO-F 4 US26 come with a warranty?
Absolutely. The Von Duprin 3547AEO-F 4 US26 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Von Duprin 3547AEO-F 4 US26?
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