QIG Intumescent Air Transfer Grilles

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.

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40 years of experience

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 Quelfire 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.


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.


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

Application / Installation

Quelfire 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.

Technical Support & Guidance

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


Product CodeDimensions (mm)Fire ResistanceFree Air Flow
QIG150/150150 x 150 x 4060 mins153m²
QIG150/300150 x 300 x 4060 mins307m²
QIG300/300300 x 300 x 4060 mins614m²
QIG112/225112 x 225 x 4060 mins161m²
QIG225/225225 x 225 x 4060 mins323m²
Cover Plates
CP150/150to suit QIG150/150150m²
CP150/300to suit QIG150/300295m²
CP300/300to suit QIG300/300593m²
CP112/225to suit QIG112/225159m²
CP225/225to suit QIG225/225320m²