Air Transfer Grilles

Air Transfer Grilles

Air Transfer Grilles

Application: Fire doors
Fire Resistance Period: Up to 60 minutes
Insulation/integrity: Integrity
Test Standard: BS 476: Part 22
Approval Type: IFC Certificate No. IFCC1001

Pyroplex® Limited offers a comprehensive range of Fire Rated Air Transfer Grille Systems that are suitable for use in fire resisting doorsets for up to 60 minutes fire resistance.

In normal use, the Pyroplex® system allows air to be circulated and moved throughout the building. During a fire the system is designed to close and provide a fire barrier to restrict the passage of hot gases.

Pyroplex® Fire Rated Air Transfer Grille Systems are tested for 30 and 60 minutes fire resistance. Test Reports No.146520/146521 and 148053 apply – combined within Assessment Report No.149511.

Testing & Certification

Test Standard

BS 476: Part 22 – fire

Approval Type

IFC Certificate No. IFCC1001

Air Transfer Grille Large Technical
Air Transfer Grille with Front Panel


  • Grilles are of a modular robust construction.
  • The frames are constructed from Zintec Mild Steel [0.65mm thick] with matching Zintec clips.
  • The system is easy to install and is maintenance free.
  • Pyroplex® intumescent material is totally unaffected by water, robust, ‘non-flaking’ and difficult to tear.


  • Faceplates are constructed from Zintec Mild Steel [1.0mm thick] and powder coated.
  • Faceplates are supplied with fixing screws.
  • Faceplates are available in a choice of two powder coated finishes – white and silver.

Pyroplex® Fire Rated Air Transfer Grille Systems have been specifically designed for use in the following applications:

  • Fire resisting doorsets – 30 minutes and 60 minutes.
Part NoDimensions [mm]Fire resistanceFree Area (%)*
ATG1500150 x 150 x 4030 and 60 mins60
ATG1503150 x 300 x 4030 and 60 mins60
ATG1300300 x 300 x 4030 and 60 mins60
ATG2251112 x 225 x 40 30 and 60 mins60
ATG2250225 x 225 x 4030 and 60 mins60

*Calculation is based upon overall grille dimensions and distance between product veins.






Part NoGrille Compatibility

The installer must ensure that the doorset/door blank has been tested with an aperture to accept an air transfer grille system for the required period of fire resistance.


Installation procedure

1. Cut the aperture in the door [The system shall be installed no closer than 150mm to the threshold and no higher than 1850mm].
2. Line the aperture with a 6mm hardwood liner.
3. Apply a bead of Pyroplex® Intumescent Acrylic Sealant centrally and spread the acrylic across the full width of timber liner, to achieve a thickness of 0.5mm.
4. Install the Pyroplex® Fire Rated Air Transfer Grille into the aperture.
5. Secure the system into place using steel pins [not supplied]. Alternatively, secure the system using self-tapping screws.
6. Fit the cover plates on both faces of the door and secure with screws provided.

Independently tested by Warringtonfire for 30 and 60 minutes fire resistance. The system has been tested for positive and negative pressure planes, satisfying integrity performance for 30 and 60 minutes. Test Report No.146520/146521 and 148053 apply – combined within Assessment Report No.149511. IFCC1001 accreditation applies.

Providing the product is installed in accordance with the requirements of the guidance document the product is guaranteed for a period of 10 years.