The 225 x 225 x 40mm Air Transfer Grille is suitable for use in fire resisting doorsets and compartment walls for up to 60 minutes fire resistance.

In normal use, the Passive Fire 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.

Passive Fire 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. CERtIFIRE Certificate No. CF549