Firemiser Insulated Rolling Fire Door

Fire Doors – Model Number: ERD20 and ERD21

Insulated Rolling Fire Door

Our Firemiser rolling door offers all of the life safety benefits of a rolling fire door along with the energy efficiency and sound reduction of an insulated rolling door.  

This insulated fire door will close in the event of a fire, acting as a physical barrier to prevent smoke and flames from spreading throughout the building. By keeping the incident isolated, both lives and property are being protected.  

The insulation used in this door is made of mineral wool, which helps to decrease sound transmission – with an R value of 5.3 and a U Value of .189 based on the ASHRAE Handbook of Fundamentals. The mineral wool also minimizes thermal transfer, which helps to keep the climate controlled air inside and the uncontrolled temperature outside. 

A Firemiser insulated fire door is ideal for an application that is on the exterior of a building but may be expanded in the future or an area that requires a fire door but also needs the sound deadening benefit of an insulated door.   

Our insulated roll up fire door is UL listed, Factory Mutual Approved and listed with the California O­ffice of the State Fire Marshall. It is listed with a protection ratings of 45 minutes, 90 minutes, 3 and 4 hours.

The SmokeShield® seal package is an option that can be added to this door if you are required to conform to UL 1784. This seal package is an additional barrier that will eliminate the migration of smoke through the building.    

Mounting Options

Insulated fire doors can be installed face of wall or between jambs on an interior or exterior wall. Acceptable wall types include masonry, structural steel jambs and drywall construction with structural steel or wood studs.

Materials and Finishes

Firemiser curtains are available in:


  • Interior slat 24 gauge / Exterior slat 24 gauge
  • Interior slat 22 gauge / Exterior slat 24 gauge
  • Interior Slat 20 gauge / Exterior slat 24 gauge
  • Interior slat 18 gauge / Exterior slat 24 gauge

Stainless Steel

  • Interior slat 22 gauge / Exterior slat 22 gauge
  • Click here for additional material and finishes options and information.
  • Finish and gauge availability may vary. Contact us with any questions.  


A standard UL labeled fire door is available up to 13.5′ wide by 12′ high.
An oversized UL labeled fire door is available up to 60′ wide by 40′ high or 1,200 sq. ft. 

For openings that fall outside of the standard construction, please contact us

Sloping or Irregular Openings – Our special bottom bar designs can address these conditions.


Entrapment Protection Devices – Entrapment protection devices ensure that a motorized door or grille will not close on an object.  If an object enters path of closure, the entrapment protection device will stop the door or grille from closing and return it to the fully open position.

Guide-Mounted Interlocks – An electrical cutout switch to prevent motor operation if locking device is not first disengaged.

Rolling Door Protector (RDP) – The RDP eliminates costly fork truck damage to coiling doors by creating a physical barrier at the top of the door that absorbs impacts.

Static Wind Load – Can be configured to withstand the full range of specific wind load requirements including missile impact ratings.  

High Cycle Springs – Heavy duty springs manufactured to withstand cycles of 100,000.

Seismic Performance Validation – We can provide project specific seismic calculations for all coiling doors that are mounted Face of Wall to steel or masonry. Seismic performance validation is per ASCE 7-05.

SpectraShield™ Powder Coat Finish – Polyester finish in more than 180 colors for durability, aesthetics, superior finish life and cost effectiveness.

Hood and Operator Covers – Metal cover to protect the coil or operator from exterior weather, debris or to meet OSHA or UL 325 safety requirements.

Vision Windows – Improve aesthetics and visibility with one- or two-way windows incorporated in the curtain.

Battery Back Up Devices – Available for motor, chain and crank operators, these devices prevent fire doors from closing from a power failure.

Firefly & Firefly BB Release Device – Optional device that ties in to a building alarm system and closes a Simple-Test fire door upon alarm activation, rather than by melting its fusible link.   

SmokeShield® Seal Package – Often required by local building codes, our smoke seal adds smoke and draft control.

Testing Stations – Safely and conveniently test and reset the functionality of the fire door at floor level.  May be flush or recess mounted.​


Codes & Listings

  • ISO 9001:2008
  • Buy America Compliance
  • LEED® Compliance

See Codes and Listings page for detailed information.

Drawing Generator

Need to see clearances and mounting details? Enter your opening dimensions into our Drawing Generator, and get custom generated drawings of your door with all the details.