Von Duprin 3527AF-4ft Fire Rat...
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$4,338.42
Von Duprin 3527AF-4ft Fire Rated Surface Vertical Rod Exit Device, Narrow Stile, Less Dogging, 4 ft

Von Duprin 3527AF-4ft Fire Rated Surface Vertical Rod Exit Device, Narrow Stile, Less Dogging, 4 ft

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Model: 3527AEO-F 4 US26D
$4,338.42
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Von Duprin 3527AF-4ft Fire Rated Surface Vertical Rod Exit Device, Narrow Stile, Less Dogging, 4 ft

Commercial-Grade Fire Rated Surface Vertical Rod Exit Device for Narrow Stile Doors

The Von Duprin 3527AF-4ft is a fire rated, surface-mounted vertical rod exit device engineered for demanding institutional and commercial applications. Featuring a smooth mechanism case and narrow stile compatibility down to 1-3/4" (44mm), this 4 ft (48") device is ANSI/BHMA A156.3 2014 Grade 1 certified and UL listed under ANSI/UL 10C for fire-rated panic exit hardware. Designed for single and double doors, the 3527A-F is non-handed (except when the SS signal switch option is used), offering flexible installation across a wide range of commercial door configurations. The device ships with 1-3/4" and 2-1/4" wood/metal door fasteners and SNB included.

Professional Features & Benefits

  • Narrow Stile Compatibility: Fits door stiles as narrow as 1-3/4" (44mm), making it ideal for aluminum storefront and narrow stile door applications in commercial and institutional settings.
  • Fire Rated Construction: ANSI/UL 10C and CAN/ULC-S104 fire-rated certification ensures compliance with fire egress requirements for rated door assemblies.
  • 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: The 3527A features a smooth mechanism case (versus the grooved case of the 3327A), providing a clean architectural aesthetic suited for modern commercial interiors.
  • One-Piece Center Case Cover: Newly designed one-piece center case cover simplifies maintenance and contributes to a streamlined appearance.
  • Non-Handed Design: Surface vertical rod device is non-handed (except when SS signal switch option is used), reducing inventory requirements and simplifying specification.
  • Field-Configurable Options: A broad range of field-configurable options and retrofit kits — including CDSI/HDSI security dogging indicators, QEL electronic latch retraction, and RX/LX electronic switches — allow the device to adapt to evolving facility needs.
  • Included Fasteners: Ships complete with 1-3/4" and 2-1/4" wood/metal door fasteners and SNB for straightforward installation on both wood and hollow metal doors.
  • Multiple Certifications: Certified to ANSI/BHMA A156.3 2014 Grade 1, ANSI/UL 10C, ANSI/UL 305, CAN/ULC-S104, and CAN/ULC-S132 for comprehensive code compliance.

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: Surface Vertical Rod Exit Devices
  • Latch Throw: 3/4"
  • Product Type: Exit Devices - Surface 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

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

Why Choose Von Duprin Quality?

Von Duprin surface vertical rod exit devices are engineered to the highest industry standards, with the 3527A-F Series achieving ANSI/BHMA A156.3 2014 Grade 1 certification and full fire-rated compliance under ANSI/UL 10C and CAN/ULC-S104. The 33A/35A Series has been purpose-built for high-use and high-abuse institutional environments including schools, hospitals, and government facilities, with a breadth of field-configurable options and retrofit kits that allow the device to keep pace with evolving technology. When dependable, code-compliant egress performance is essential, Von Duprin delivers proven commercial-grade reliability.

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:
Surface Vertical Rod Exit Devices
Latch Throw:
3/4"
Product Type:
Exit Devices - Surface 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 3527AEO-F 4 US26D – Frequently Asked Questions

1) Will the Von Duprin 3527AF fit an aluminum storefront door with a narrow stile?
Yes. The 3527AF is a narrow stile surface vertical rod device and mounts on stiles down to 1-3/4 inches (44mm), which is what aluminum storefront doors typically give you. It is built for 1-3/4 inch thick doors only, so if your leaf is thinner or thicker than that, this is not the device. If you have a wide stile door instead, a wide stile device like the Sargent 2727 or Corbin Russwin ED5400 is the correct family.
2) Is this exit device fire rated, and can I use it on a labeled door?
Yes. The 3527AF is a fire rated exit device, UL listed under ANSI/UL 10C and CAN/ULC-S104, plus ANSI/UL 305 and CAN/ULC-S132 for panic hardware. It is also ANSI/BHMA A156.3 2014 Grade 1. Because it is fire rated, it ships less dogging, mechanical hold-open is not permitted on a rated assembly.
3) Can one 4 ft Von Duprin 3527AF cover a 48 inch wide door?
The 4 ft version is sized for a 48 inch door, that is the device size listed. Mount it with the push pad centerline at 39-13/16 inches from the finished floor and allow 3-13/16 inches of projection off the door face for clearance to walls, jambs, and adjacent hardware. Mechanism case measures 8-3/16 x 1-9/16 x 2-13/32 inches.
4) Do I need to specify handing on a surface vertical rod exit device like this?
The device itself is non-handed, so one part number covers both hands, with one exception: if you add the SS signal switch option the device becomes handed. Handing still has to be called out on the order (RHR or LHR) because the outside trim and escutcheon are handed even when the chassis is not.
5) Will the 3527AF latch into my existing top and bottom strikes?
Latchbolt throw is 3/4 inch top and bottom. A surface vertical rod device latches at the head and the threshold rather than the jamb, so it needs a top strike at the frame head and a bottom strike or floor strike at the sill, not an edge strike. If your opening is currently running a rim device, the strike prep is different and you will be adding new strikes.
6) What do I order to get an outside lever or key access with this device?
Trim function is an order choice. Exit only (EO) gives you no outside operation. For outside entry you can specify L (lever), L-BE (lever with blank escutcheon), L-DT (lever with dummy trim), NL (night latch) or NL-OP (night latch with optional pull), or T, T-BE, TL and TL-BE for thumbturn variants. If you pick an L trim, you also choose the lever design: 06 is the default, with 01, 02, 03, 05, 07, 17 and 18 also offered.
7) Does this device work on a pair of doors without a mullion?
Yes. A surface vertical rod device latches into the frame head and the sill, so each leaf is independently secured and no center mullion is needed. That is the main reason to choose vertical rod over a rim device, a rim device on a pair requires a removable mullion or a vertical rod on the inactive leaf. The 3527AF is offered for both single and double door applications.
8) If the opening is not fire rated, what narrow stile surface vertical rod device can be used instead of the Von Duprin 3527AF?
On a non-rated panic opening you do not need the fire rated construction of the 3527AF. Narrow stile alternatives include the Corbin Russwin ED4400, a Grade 1 non-fire-rated narrow stile surface vertical rod device for 1-3/4 inch doors that accepts trim; the Falcon 19-V-EO, Grade 1 narrow stile exit only for 1-3/4 inch doors; the Adams Rite 8200 Series, a Grade 1 non-rated narrow stile life-safety device; and the TownSteel ED3727, Grade 1 narrow stile and rated for wood doors. Note that a non-fire-rated device cannot be installed on a labeled fire door assembly.
9) Can I order this vertical rod device less bottom rod?
Yes, less bottom rod (LBR) is an available option. LBR removes the bottom rod and latch, which keeps the sill clear where flooring, carpet, or debris would foul a bottom latch. Note that dropping the bottom rod changes how the opening is secured, so confirm the LBR arrangement is acceptable for your rated assembly before specifying it.
10) What electrified options can I get on the Von Duprin 33A/35A vertical rod device?
Latch retraction can be specified as EL (electric latch retraction), QEL (quiet electric latch retraction), or PN (pneumatic). Monitoring and alarm options include RX request to exit, RX2 double RX, LX latchbolt monitor, LX-RX combination, WP-RX waterproof RX, and the ALK alarm kit in three forms (ALK less switch, RX-ALK, LXRX-ALK). Von Duprin also offers CDSI and HDSI security dogging indicators as field-configurable retrofit kits on this platform.
11) Is there an ADA accessible version of this exit device?
AX, the accessible device option, is a required yes/no selection when ordering. Specify AX when the opening has to meet reduced operating force requirements. The push pad style operation itself is the standard touchpad actuation.
12) Are mounting fasteners included, or do I need to order them for a wood door?
Fasteners are in the box. The 3527AF ships with both 1-3/4 inch and 2-1/4 inch wood/metal door fasteners and SNB (sex nuts and bolts), so it covers hollow metal and wood door mounting without a separate fastener pack. You still supply the strikes and any trim you specified separately.
13) What is the difference between the Von Duprin 3527A and the 3327A?
Mechanism case appearance. The 3527A uses a smooth mechanism case, the 3327A uses a grooved case. Both are in the same 33A/35A vertical rod family, so the choice is architectural rather than functional. The 3527A also carries a one-piece center case cover.
14) I need a narrow stile vertical rod device but the door is not fire rated. What are my options?
On a non-rated opening you are not limited to a fire device. Narrow stile non-rated Grade 1 options include the Corbin Russwin ED4400 (exit only, accepts trim, 1-3/4 inch doors), the Corbin Russwin ED7400 (narrow stile crossbar rather than push pad, accepts operator trim), the Falcon 19-V-EO, the Adams Rite 8200 Series life-safety device, and the TownSteel ED3727. Pick the crossbar ED7400 only if you are matching existing crossbar hardware, the rest are pad style.
15) Is a Grade 1 exit device worth it for a school or hospital corridor?
For that traffic, yes. The 3527AF is certified to ANSI/BHMA A156.3 2014 Grade 1, the heaviest duty classification for exit devices, and the 33A/35A platform was built for high-use and high-abuse institutional openings, schools, hospitals, and government buildings. If you are standardizing a facility, the field-configurable option set (dogging indicators, QEL, RX/LX switches) lets you add electronics later without swapping the device.
16) Is there a lighter duty or Grade 2 alternative to the Von Duprin 3527AF for a low traffic non-rated door?
The 3527AF is an ANSI/BHMA Grade 1 fire rated device. Where a lower grade is acceptable on a non-rated opening, the Dexter ED2000 Series is a Grade 2 surface vertical rod panic device and the TownSteel TS5100 Series is a Grade 2 heavy duty wide stile surface vertical rod device, both non-fire-rated. The Design Hardware 2000V is also a standard duty non-rated surface vertical rod device, with the 1000V as the heavy duty version of the same family. None of these carry the fire rating the 3527AF holds, so they are not options on a labeled door.
17) What is the difference between a crossbar surface vertical rod device like the Corbin Russwin ED7400 and the Von Duprin 3527AF?
The Von Duprin 3527AF uses a push pad actuator with a smooth mechanism case. The Corbin Russwin ED7400 is a narrow stile surface vertical rod device with a crossbar actuator for 1-3/4 inch doors, Grade 1, accepting operator trim; the Sargent 3727 is a Grade 1 wide stile device with a standard push bar. All three latch a vertical rod at the top of the door, but the touchpad versus crossbar or push bar difference changes the look of the door face and the way users are accustomed to operating it, so matching existing devices in a building usually decides it.
18) Can I use the Sargent 12-8710 in place of the Von Duprin 3527AF?
No, not as a functional swap. The Sargent 12-8710 is a fire rated wide stile surface vertical rod device in a dummy function, meaning it does not latch or release; it is used on the inactive leaf or where only the appearance of a device is wanted. The Von Duprin 3527AF is an operating fire rated narrow stile device with a 3/4 inch latch throw, available in exit only and in trim functions including lever, night latch, and thumbturn.
19) Which surface vertical rod devices are reversible or non-handed like the Von Duprin 3527AF?
The Von Duprin 3527AF is non-handed, which lets one device cover either hand of opening. Comparable devices described as reversible include the BEST Precision 5201 Series and the Sargent 2727, a Grade 1 fire rated wide stile device. The Orca OED56 Series is also listed as non-handed, in a less bottom rod exit only configuration. Note the 3527AF also offers a less bottom rod option.
20) I need a surface vertical rod device that accepts outside trim instead of exit only - how does that narrow the choice against the Von Duprin 3527AF?
The Von Duprin 3527AF covers both cases, with exit only plus lever, blank escutcheon, dummy trim, night latch, thumbturn and thumbturn-unlock trim functions on the same device family. Among the comparables, the Corbin Russwin ED4400 narrow stile and ED5400 wide stile are listed as exit only or accepting trim, and the ED7400 accepts operator trim. Devices such as the Falcon 19-V-EO, Falcon 24-V-EO, Falcon 25-V-EO, Arrow 3700, Arrow S1150, and Orca OED56 are exit only.
21) For a 48 inch wide door opening, which surface vertical rod exit devices cover that width?
The Von Duprin 3527AF is offered in a 48 inch, 4 ft device size for narrow stile 1-3/4 inch doors. Most of the comparable surface vertical rod devices are catalogued at shorter device lengths - the Adams Rite 3100 and 8200 at 30 inches, the Arrow S1150 at 30 inches, and the Corbin Russwin ED4400, BEST Precision 2201, Falcon 19-V-EO and TownSteel ED3727 at 36 inches - so for a wide leaf the 48 inch 3527AF is the direct fit among these.
22) What finishes does the Von Duprin 3527AF come in for matching other hardware in my 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. For storefront work 628 aluminum and 710 dark bronze anodized are the usual matches to the frame.
23) Which surface vertical rod devices are listed for wood doors as an alternative to the Von Duprin 3527AF?
The Von Duprin 3527AF ships with 1-3/4 inch and 2-1/4 inch wood and metal door fasteners plus SNB, so it is prepared for wood or hollow metal. Among the comparables, the TownSteel EF9727 is a fire rated Grade 1 heavy duty wide stile device listed as wood door compatible, and the TownSteel ED3727 narrow stile and ED8927 wide stile, both Grade 1 and non-fire-rated, are also listed for wood doors.
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Does the Von Duprin 3527AEO-F 4 US26D come with a warranty?
Absolutely. The Von Duprin 3527AEO-F 4 US26D 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 3527AEO-F 4 US26D?
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