Air Transfer Grilles are suitable for use in fire resisting doorsets for up to 60 minutes fire resistance.

In normal use, the system allows air to be circulated and moved throughout the building. In the event of a fire the intumescent grilles are designed to close and provide a fire barrier to restrict the passage of hot gases.

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.

Also known as intumescent grilles, intumescent vents, fire louvres, fire blocks, or fire vents.