The GR1 + K is a circular fire resistant ventilation grill with 60’ fire resistance. It is a see-through grill finished with a frame and aluminium collars.

The fire resistant ventilation grill is composed of plastic sleeves filled with intumescent strips (lamellas start to swell at 100°C)

For 120’ fire resistance, 2 GR1 (+K) grills can be placed one behind the other.

• Tested according to NBN 713.020
• Suitable for incorporation in rigid wall
• The maximal air velocity is 8m/s
• Not suitable for use in outer walls
• The strips swell from 100°C
• Maintenance-free
• The direction of the air circulation does not influence the proper functioning of the grill