Von Duprin 33AF-3ft Fire Rated...
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$2,130.00
$1,471.37
Von Duprin 33AF-3ft Fire Rated Grooved Case Narrow Stile Rim Exit Device, Less Dogging, 36"

Von Duprin 33AF-3ft Fire Rated Grooved Case Narrow Stile Rim Exit Device, Less Dogging, 36"

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Model: 33AEO-F 3 US28
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$1,471.37
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Von Duprin 33AF-3ft Fire Rated Grooved Case Narrow Stile Rim Exit Device, Less Dogging, 36"

Commercial-Grade Fire Rated Panic Exit Hardware for Narrow Stile Doors

The Von Duprin 33AF-3ft is a fire rated, grooved case narrow stile rim exit device engineered for demanding institutional and commercial applications. Designed to fit door stiles as narrow as 1-3/4" (44mm), this 36" rim exit device features a one-piece center case cover and is certified to ANSI/BHMA A156.3 2014 Grade 1 standards. UL listed for panic exit hardware and compliant with ANSI/UL 10C for fire-rated applications, it is suitable for single and double doors with mullion. The device is non-handed, offering flexible installation across a wide range of openings.

Professional Features & Benefits

  • Narrow Stile Compatibility: Fits door stiles as narrow as 1-3/4" (44mm), making it ideal for aluminum-framed and narrow stile door applications.
  • Fire Rated Construction: Certified to ANSI/UL 10C and CAN/ULC-S104 for fire-rated applications, ensuring code compliance in fire-rated openings.
  • ANSI/BHMA Grade 1 Certified: Meets ANSI/BHMA A156.3 2014 Grade 1 — the highest industry standard — for heavy-duty institutional performance.
  • Grooved Mechanism Case: The 33A Series features a distinctive grooved case design with a newly designed one-piece center case cover for a refined architectural appearance.
  • Non-Handed Design: The rim device is non-handed (except when the SS signal switch option is used), simplifying specification and installation across varied 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 technology.
  • Broad Device Type Availability: The 33A/35A Series supports rim, surface-mounted vertical rod (27), concealed vertical rod with 5/8" bottom bolt (47), concealed vertical rod with 1-1/2" bottom bolt (48), concealed vertical cable (49), and wood door concealed vertical cable (50WDC) configurations.
  • ADA Upgrade Option: The AX upgrade option is certified to meet the 5 lb. force requirements of the 2010 ADA (Chapters 404.2.7 and 30934) and the 2013 California Building Code (Chapter 11B-309.4).
  • Delayed Egress Option: The CX (CHEXIT) upgrade meets NFPA and IBC requirements for delayed egress, securing doors for 15 seconds after a request to exit while a nuisance alarm sounds.

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 - Rim
  • Subcategory: Rim Exit Devices
  • Latch Throw: 3/4"
  • Product Type: Exit Devices - Rim
  • Commercial/Residential: Commercial
  • Device Centerline from Finished Floor: 39-13/16"
  • Stile Type: Narrow Stile
  • Wood Door Compatible: No
  • MAP Policy: Yes
  • Door Hand Direction: Non-Handed
  • Door Thickness Range: 1-3/4"
  • Product Size: 36"
  • 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

Delayed Egress Compliance

The Von Duprin 33A Series supports the CX (CHEXIT) upgrade option, which meets NFPA and IBC requirements for delayed egress. This configuration keeps doors secure for 15 seconds after a request to exit while a nuisance alarm sounds, providing an added layer of security for controlled egress applications.

Why Choose Von Duprin Quality?

Von Duprin rim exit devices are engineered to the highest industry standards, with the 33AF-3ft 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. The grooved case design, narrow 1-3/4" stile compatibility, and broad range of field-configurable retrofit options make this device a trusted choice for schools, hospitals, and government facilities where dependable, fire-rated panic exit performance is essential.

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 - Rim
Subcategory:
Rim Exit Devices
Latch Throw:
3/4"
Product Type:
Exit Devices - Rim
Commercial/Residential:
Commercial
Device Centerline from Finished Floor:
39-13/16"
Stile Type:
Narrow Stile
Wood Door Compatible:
No
MAP Policy:
Yes
Door Hand Direction:
Non-Handed
Door Thickness Range:
1-3/4"
Product Size:
36"
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

Parts & Accessories

    Von Duprin 33AEO-F 3 US28 – Frequently Asked Questions

    1) Will the Von Duprin 33AF rim exit device fit an aluminum storefront door with a narrow stile?
    Yes. The 33AF is a narrow stile rim device that fits stiles as narrow as 1-3/4 inches, which is what puts it on aluminum-framed storefront and narrow stile doors where a wide stile pushpad device will not land. It is built for 1-3/4 inch thick doors, and the device body measures 8-3/16 x 1-9/16 x 2-13/32 inches with a 3-13/16 inch projection off the door face, so check your clearance to any adjacent wall or return.
    2) What is the difference between the Von Duprin 33AF and the Adams Rite 8800 or 8700 narrow stile rim devices?
    Fire rating is the dividing line. The 33AF is fire rated and Grade 1; the Adams Rite 8800 and 8700 Series narrow stile rim devices are Grade 1 but not fire rated, so they belong on non-rated openings. The 8800 is listed for 1-3/4 to 2-1/4 inch doors, which is wider than the 33AF's single 1-3/4 inch thickness, and the 8700 is wood door compatible where the 33AF is not. If you need narrow stile plus fire rating, the Adams Rite 3700 Series is the fire rated option in that line.
    3) Is the Von Duprin 33AF fire rated, and what standards does it meet?
    Fire rated, yes. The 33AF is UL listed panic hardware and certified to ANSI/UL 10C and CAN/ULC-S104 for fire rated openings, plus ANSI/UL 305 and CAN/ULC-S132, and it is ANSI/BHMA A156.3 2014 Grade 1. That combination is what lets it go on a fire rated egress door in a school, hospital or government building. Note the fire rated version is supplied less dogging, since dogging is not permitted on a fire door.
    4) Why does the fire rated 33AF have no dogging, and how do I hold the door open during business hours?
    Fire rated exit devices are supplied less dogging because holding the latch retracted would defeat the door's ability to latch in a fire. If you need the latch held back on a schedule, do it electrically: the 33AF takes EL electric latch retraction, QEL quiet electric latch retraction, or PN pneumatic retraction as an ordering option, and there is a QEL modular conversion kit (Von Duprin 040061) for 3-foot and 4-foot devices in this family. On a non-rated opening, a mechanically dogged device is the simpler answer.
    5) Does the Von Duprin 33AF have to be handed when I order it?
    No handing to specify. The 33AF is non-handed, so one device covers left and right hand openings, which is why it is a common stock item for property managers standardizing across a building. The one exception is when the SS signal switch option is used, which does become handed.
    6) Will a rim exit device like the 33AF work on a pair of doors, or do I need vertical rods?
    A rim device latches into a strike on the frame or, on a pair, into a removable mullion set between the leaves. So the 33AF handles a pair only if you are putting a mullion in. If you need a clear opening with no mullion, go to a vertical rod configuration instead: the 33A/35A family also comes as surface vertical rod (27), concealed vertical rod with 5/8 inch bottom bolt (47), concealed vertical rod with 1-1/2 inch bottom bolt (48), concealed vertical cable (49), and wood door concealed vertical cable (50WDC).
    7) What outside trim do I have to order with the Von Duprin 33AF, and what does exit only mean?
    Trim function is a separate choice and it decides how people get back in. The options are EO exit only (no outside operation at all), L lever and L-BE lever with blank escutcheon, NL night latch and NL-OP night latch with optional pull (key retracts the latch), T and T-BE thumbturn, TL and TL-BE thumbturn that unlocks, and DT dummy trim. If you pick an L trim you also pick the lever design: 06 is the default, with 01, 02, 03, 05, 07, 17 and 18 also available. EO is the usual pick on a stair discharge or a rear exit where nobody needs to re-enter.
    8) What fire rated 36 inch rim exit device can I use if the door is not narrow stile?
    The Marks USA M9900F is a fire rated 36-inch rim exit device supplied exit only with a panic protector end cap, and the Orca Hardware OED85 Series is a fire rated 36-inch rim device also configured exit only. Both keep the fire rating and the 36-inch length of the Von Duprin 33AF-3ft. Where they part company is trim: the 33A device is ordered with a trim function such as lever, night latch, or thumbturn, while the M9900F and the OED85 are exit only, so outside access has to come from somewhere else on the opening.
    9) Which narrow stile rim device should I use on a door thicker than 1-3/4 inches?
    The Von Duprin 33AF-3ft is built for 1-3/4 inch doors. For a thicker leaf, the Adams Rite 8800 Series narrow stile rim exit device covers 1-3/4 inch to 2-1/4 inch and is Grade 1. It is not fire rated, so it fits a thicker non-rated narrow stile opening rather than a fire rated one.
    10) Is the SDC PSB560 pressure sense bar a substitute for a Von Duprin 33A rim exit device?
    It is a different class of hardware. The SDC SureExit PSB560 at 36 inches is a pressure sense bar with tri-failsafe technology, and the SDC MSB550 is a mechanical switch bar that releases an electromagnetic lock; both are switching bars that signal a lock to release, and neither is fire rated. The Von Duprin 33AF-3ft is a fire rated rim exit device with its own 3/4 inch latch throw doing the latching at the frame. If the opening is fire rated and needs a latching device, the switch bars do not fill that role.
    11) Is a Cal-Royal A9800 rim exit device an equivalent to the Von Duprin 33AF?
    The Cal-Royal A9800 Series is a 36-inch heavy duty rim exit device carrying a Grade 2 rating and is not fire rated. The Von Duprin 33AF-3ft is ANSI Grade 1 and fire rated. If the spec on the drawing calls for Grade 1 on a fire rated opening, the A9800 does not meet it; on a non-rated opening where Grade 2 is acceptable, it is a working rim device at the same 36-inch length.
    12) Will the 33AF latch into the strike that is already on my frame?
    The 33AF has a 3/4 inch latch throw, which is the depth it needs from the strike. A rim strike is surface mounted on the frame stop, so if you are swapping in a Von Duprin rim device on an opening that already had one, the existing strike and prep will usually take it. Coming off a different manufacturer's rim device, plan on the strike being replaced with the one supplied.
    13) What height should the 33AF exit device be mounted at?
    Set the device centerline at 39-13/16 inches from the finished floor. That is the dimension to lay out from before you drill, and holding it consistently across a building keeps the push pads lined up from opening to opening.
    14) What is the AX option on Von Duprin exit devices and do I need it for ADA?
    AX is the accessible upgrade, certified to the 5 lb force requirement of the 2010 ADA (Chapters 404.2.7 and 30934) and the 2013 California Building Code Chapter 11B-309.4. It is a yes/no choice at order time on the 33AF, and it matters on openings where operating force is being enforced, which in practice is most public accessible routes and anything in California.
    15) What other fire rated 36 inch rim exit devices are there besides the Von Duprin 33AF?
    If the opening is not narrow stile, a few fire rated rim devices cover 36 inch doors: the Marks USA M9900F 36 inch exit only device with a panic protector end cap, the Orca Hardware OED85 Series 36 inch fire rated rim device (exit only), and the Dexter ED1000 Series Grade 1 fire rated rim device. Those are exit only, so if you need lever, night latch or thumbturn trim on the outside, the 33AF is the one that takes it. For a smaller narrow opening, the Arrow FS1250 is a fire rated 32 inch device for 1-3/4 inch doors.
    16) Can I add electric latch retraction to a 33AF I already have installed, or do I have to buy a new device?
    You can convert in the field. Von Duprin makes a QEL modular conversion kit (040061) for 3-foot and 4-foot 33A/35A/98/99 devices, a matching QEL baseplate conversion kit with connectors for 3-foot devices (040063), and a 36 inch electric latch retraction conversion kit for the same families. The 33AF is a 36 inch device, so the 3-foot kits are the right length. Von Duprin also lists CDSI/HDSI dogging indicator, RX and LX retrofit kits for this series.
    17) Do any of the Grade 1 wide stile rim exit devices work on a 1-3/4 inch narrow stile aluminum door?
    No. Devices such as the Corbin Russwin ED5200, the BEST Precision 2101 at 36 inches, the TownSteel ED1100 and the Dormakaba 8300 are all wide stile rim exit devices, which means the chassis needs more stile face than a narrow stile aluminum door provides. The Von Duprin 33AF-3ft is a narrow stile device, which is what the 1-3/4 inch stile calls for.
    18) What narrow stile rim device is the alternative if a crossbar or paddle actuator is wanted instead of a push pad?
    The Von Duprin 33AF-3ft is a push pad device. If the opening calls for a crossbar, the CRL Jackson 1095 Series at 48 inches is a crossbar rim panic device, and the CRL Jackson 1095P is the paddle version; the Corbin Russwin ED3200 is a 48-inch crossbar rim device for 1-3/4 inch doors. All three are wide stile and none is fire rated, so they belong on a non-rated wide stile opening rather than a fire rated narrow stile one.
    19) Which narrow stile rim device has a night latch function without ordering trim separately?
    The Sargent 8504 is a Grade 1 narrow stile rim exit device supplied in the night latch function. The Von Duprin 33AF-3ft reaches the same result through its trim function selection, which includes NL night latch and NL-OP night latch with optional pull, alongside lever and thumbturn options, and the 33A device is fire rated where the opening requires it.
    20) Can a concealed vertical rod device replace a rim exit device on the same opening?
    Not directly. The Hager 4601 Series 36-inch device is a Grade 1 concealed vertical rod narrow stile exit device, and the Hager 4501 is the wide stile concealed vertical rod version at 36 inches; both latch top and bottom into the frame and floor and need the door prepped for concealed rods. The Von Duprin 33AF-3ft is a rim device latching at the strike with a 3/4 inch throw, so swapping between the two means changing the door and frame prep, not just the device.
    21) What finishes does the Von Duprin 33AF come in, and which one matches aluminum storefront?
    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 clear anodized aluminum storefront, 628 aluminum is the match; on dark bronze anodized storefront, 710 lines up with the frame.
    22) What are the narrow stile alternatives from Falcon and Detex to a Von Duprin 33A rim device?
    The Falcon 1590EO is a Grade 1 narrow stile rim exit device at 42 inches, exit only, for 1-3/4 inch doors, and the Falcon 1790EO is the same 42-inch exit only narrow stile arrangement. The Detex 40 Advantex is a Grade 1 extra heavy duty narrow stile rim device. All three share the narrow stile chassis with the Von Duprin 33AF-3ft; the 33A device is 36 inches and non-handed, so on a 36-inch leaf the length is the first thing to reconcile.
    How fast can I get the Von Duprin 33AEO-F 3 US28 delivered?
    Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
    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 33AEO-F 3 US28 come with a warranty?
    Absolutely. The Von Duprin 33AEO-F 3 US28 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 33AEO-F 3 US28?
    You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
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