🔥 DRIWON DN-9500 — UL Listed · 3-Hour Fire Rated
Positive latch guaranteed · Grade 1 · Handles doors 44–440 lbs · Ships via Amazon Prime with free delivery.
Why a Listed Closer Is Non-Negotiable on Fire-Rated Openings
NFPA 80 — Standard for Fire Doors and Other Opening Protectives — requires that every piece of hardware on a fire-rated door assembly carry a listing from a recognized testing laboratory (typically UL) for the specific fire rating of that assembly. A single non-listed hardware component invalidates the entire fire-rated assembly, creating a life-safety deficiency that must be corrected before an Authority Having Jurisdiction (AHJ) will accept the installation.
This means you cannot install a non-listed closer on a fire door, even temporarily, and even if the closer is Grade 1 by ANSI/BHMA standards. The ANSI grade and the UL fire listing are separate certifications — a closer can hold one without the other.
⚠️ Critical: A Grade 1 closer without a UL fire listing cannot legally be installed on a fire-rated door assembly. Always verify the UL listing number in the manufacturer's documentation and confirm it in the UL Product iQ database before specifying for a rated opening.
UL 10B vs UL 10C: What's the Difference?
UL 10B (Fire Tests of Door Assemblies) tests the door assembly under standard fire conditions — a specific time-temperature curve applied to one face of the door. A closer listed under UL 10B is suitable for most commercial fire door applications.
UL 10C (Positive Pressure Fire Tests of Door Assemblies) adds a positive pressure differential — simulating the pressurized conditions in a real fire where hot gases push against the door. UL 10C is a more demanding test and is required in jurisdictions that enforce IBC positive-pressure requirements, including most new commercial construction in the US.
For maximum compliance across jurisdictions, specify a closer listed under both UL 10B and UL 10C, and confirm it also carries a UBC 7-2 listing if the project is in a jurisdiction still referencing the Uniform Building Code.
Fire Rating Levels and Where Each Applies
| Fire Rating | Typical Application | Closer Requirement |
|---|---|---|
| 20-minute | Corridor doors, restroom doors in rated walls | UL-listed closer, positive latch |
| 45-minute | Some corridor-to-corridor doors, suite entries | UL-listed closer, positive latch |
| 60-minute (1-hour) | Separation walls between occupancies | UL-listed closer, no hold-open (unless FA-tied) |
| 90-minute | Exit enclosures in sprinklered buildings | UL-listed closer, self-close from 180° |
| 3-hour (180-minute) | Stairwells, unsprinklered buildings, high-hazard | UL 10B/10C listed, self-close from any angle |
NFPA 80 Annual Inspection: What Inspectors Check
NFPA 80 requires annual inspection of all fire-rated door assemblies. For door closers specifically, inspectors verify:
- The closer body carries a visible UL label with the correct fire rating
- The door closes and latches from full-open position without manual assistance
- The arm is securely mounted with no loose or missing fasteners
- No hold-open device is present (unless connected to fire alarm for automatic release)
- Hydraulic fluid is not leaking from the body or valve adjusters
- The closer is the original listed model — field modifications or substitutions invalidate the listing
Failures found during NFPA 80 inspection must be corrected and documented. Facilities with Joint Commission oversight (hospitals, senior care) face additional scrutiny as fire door compliance is a frequently cited immediate threat to life.
Hold-Open Arms on Fire Doors: The Rule
Hold-open arms that mechanically keep a fire door open are prohibited on fire-rated assemblies unless the hold-open mechanism is connected to the building fire alarm system and automatically releases the door upon alarm activation. This is a common non-compliance issue found during inspections — the hold-open arm looks convenient but eliminates the fire door's protective function. Standard delayed-action (which temporarily slows but never stops the closing sequence) is permitted on fire-rated doors when it carries the appropriate UL listing.
📦 DN-9500: The Right Closer for Every Fire-Rated Opening
UL listed · 3-hour fire rated · Positive latch guaranteed · Grade 1. Available on Amazon with free delivery.
Fire-Rated Door Closer Solutions
Fire-Rated Door Closer FAQ
Do fire doors need a door closer?
Yes. NFPA 80 requires fire doors to be self-closing or automatic-closing and positively latching, and the closer must be listed for the fire door assembly.
What is fire rated hardware for hospitals?
Listed closers, hinges, latches and exit devices installed on labeled fire and smoke doors. See our hospital door closer page.
Can I use a hold-open arm on a fire door?
No, unless the hold-open is connected to the fire alarm and releases the door automatically on alarm.