Intumescent Fire Grille & Ventilation Manufacturers


Intumescent Fire Grille

Intumescent fire grilles are constructed with a rust preventative zintec coated steel frame containing slats encasing strips of graphite based intumescent material.

The purpose of the Intumescent Fire Grille is to allow ventilation while maintain each individual compartments fire rating.

The intumescent material reacts when in contact with fire to expand and fill the area inside the grille, cutting off oxygen from the fire and acting as a barrier to prevent the spread of fire.

They are often installed in doors, walls and partitions.

  • Certified to BS476 parts 20 & 22
  • Effective protection for 30, 60 and 120 minutes
  • Up to 85% free area

Intumescent Sealant

A graphite based intumescent used to seal around articles of penetration through a fire barrier.

Its use ensures the integrity of the fire barrier is protected in respect of creating a seal around any gaps.

For use when installing intumescent fire grilles and other passive fire components. Certified to BS standards for up to 4 hours.

  • 4 hour protection
  • Certified to BS standard
  • For use with Intumescent fire grilles

Intumescent Fire Grille

Also known as:

Intumescent Fire Block

Fire Block

Fire Grille

Intumescent Air Transfer Grill

Air Transfer Grille

Intumescent Fire Core

Fire Core



To prevent spread of fire in areas of required ventilation

Fitted in Doors, Walls, partitions

Other areas of ventilation with a requirement for a fire barrier



Prevents the spread of fire for up to 1 hour

Standard Free Area approximately 80%

Tested in accordance with BS476 parts 20 and 22

Intumescent activates at 150-160 degrees Celsius.



Overall Size = List size – 3mm           ie. 300×300 = overall size 297×297

Slats containing intumescent are positioned 37.5mm apart



Frame and slats are constructed out of 0.6mm zintec coated steel

Intumescent material is a graphite based rubber with an expansion rate of 15 times its original size



Pressed Steel Return Air Grilles (Cover Grilles) can be provided to suit the size of your Intumescent Fire Grille


What Is Intumescent?

An intumescent is a substance that swells as a result of heat exposure, thus increasing in volume and decreasing in density. Intumescents are typically used in passive fire protection .