Air Tight Doors

ASSA ABLOY provides a wide range of Air Tight Metal doors available with a variety of configuration and vision panel options, tested according to American Standards (UL) & British Standards (BS) suitable for locations such as staircase, corridor, service rooms or entrances.

Our full range of insulated doors with up to 4 hours fire rating is designed to suit power substations, cold stores, heat transfers applications and other similar locations.

Gasketing and thresholds are used to control the flow of air, smoke, heat or cold, water, sound or other environmental factors through the door opening. The location or intended use of the door assembly, the environment to which it is exposed, and the performance expected will dictate the selection of gasketing and threshold products.

The variety of materials, their composition, profiles, and performance are virtually limitless. These are described in ANSI/BHMA A156.21 or A156.22. Generally, gasket materials are sponge neoprene, rubber, vinyl, brushes, or magnets. Retainers are generally steel, aluminum, brass, bronze, vinyl, or other non-ferrous materials. Information in catalogs published by BHMA members aid in the selection of perimeter sealing “systems” to meet the applicable performance criteria of the door assembly.



  • Full range of sizes
  • Single or double-leaf version
  • Glazing or fire protection
  • Noise insulation properties Rw up to 50 dB
  • Door frames are made of steel galvanised sheet and stainless steel
  • Hollow metal steel doors are powder-coated in any colour from the RAL palette in order to protect steel elements against the corrosion
  • Hollow metal stainless steel doors are also available in brushed finish and mirror finish
  • The adaptability of the material shown to standard steel doors and frames
  • The ability to maintain gasketing at the door and frame during periods of normal thermal movement to the balance of the building structure
  • Easy to maintain and highly durable


  • Fire Rated 30/60/90/120 minutes (BS and UL)
  • Double Leaf Steel Doorset with Decorative Cladding
  • Wall access panel


The production of steel doors is based on unique technology, which involves procedure of joining steel sheets in door leaves by bending and mechanical joints. This solution guarantees high resistance to corrosion and perfectly smooth surface of the door leaf.



The doors are made of galvanized steel sheets or stainless steel sheets grade 304 (also available SS grade 316 on special customer request). Door leaves are filled with structural honeycomb or mineral wool with vertical stiffener of high density depending on the type of the door.



  • Pre-coated steel sheets RAL 7035, 5010, 9002, 9006, 9007, 9010, 9016
  • Powder-coated to any RAL colour from standard RAL colour chart
  • Stainless steel finish (mirror or brush finish)
  • Epoxy powder primed finish
  • Decoral painting system (wooden finish)
  • Wet paint (spray paint)

Doors leaves are wrapped with foil in order to protect during the transport and the assembly.

  • Single or double leaf 
  • With fire resistance up to 120 mins
  • Flush, with vision panel or louver
  • Oversize with maximum height or width 3 m (double leaf)


  • Welded corner
  • Welded Butt corner
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