Intumescent Air Transfer Grille for Doors

Intumescent Air Transfer Grille | QIG

QIG is a range of Intumescent Air Transfer Grille Systems that are suitable for use in door sets and compartment walls for up to 60 minutes fire resistance.

Features & Benefits

  • Tested to BS 476: Part 22: 1987
  • Up to 60 minutes fire rating
  • Modular robust construction
  • Easy to install and maintenance free


There are no published standards for these components but QIG Intumescent Air Transfer Grilles have been tested by Warrington Fire Research Centre according to BS 476 Parts 20 & 22: 1987. Tests show that a 600 x 600mm can provide fire resistance of up to 60 minutes.

Name: Intumescent Air Transfer Grille (QIG)


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The frames are constructed from Zintec Mild Steel (0.65mm thick) containing high performance graphite based intumescent material which reacts under the influence of heat to form a carbonaceous char which provides an effective insulation plug thus preventing smoke and fire passing through to the adjoining compartment.


QIG Intumescent Air Transfer Grilles are expected to last the lifetime of the service installation.

Technical Support & Guidance

Should you require any further information regarding this product, please don’t hesitate to contact one of our specialists.

Application / installation

QIG Intumescent Air Transfer Grilles have been specifically designed for the use of fire resisting door sets for 30 minutes and 60 minutes.

  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 Quelfire GM Intumescent Acoustic Sealant centrally spread the mastic across the full width of the timber liner, to achieve a thickness of 0.5mm.
  4. Install the Quelfire QIG Intumescent 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.

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Product Code Dimensions (mm) Fire Resistance Free Air Flow
QIG150/150 150 x 150 x 40 60 mins 153m²
QIG150/300 150 x 300 x 40 60 mins 307m²
QIG300/300 300 x 300 x 40 60 mins 614m²
QIG112/225 112 x 225 x 40 60 mins 161m²
QIG225/225 225 x 225 x 40 60 mins 323m²

Cover Plates

Product Code Dimensions (mm) Fire Resistance Free Air Flow
CP150/150 to suit QIG150/150 n/a 150m²
CP150/300 to suit QIG150/300 n/a 295m²
CP300/300 to suit QIG300/300 n/a 593m²
CP112/225 to suit QIG112/225 n/a 159m²
CP225/225 to suit QIG225/225 n/a 320m²

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