Ventilation grilles that let air through in normal use and close by themselves in a fire: slats with intumescent material swell under heat and seal the opening. They are fitted in fire doors, walls and ceilings where ventilation is needed – for example boiler rooms, substations and storerooms.
The grille's fire resistance must match the wall or door it goes into, and the grille must be tested for that kind of installation. For a quotation we need the opening sizes, the required EI class and whether the grille goes into a door, wall or ceiling.
Certification
Delivered with
Documents on the product's performance and class, and installation and maintenance instructions – the documents requested at building inspection.
Intumescent fire grilles
Frequently asked questions
How does the grille close?
By itself, without power or a fire alarm – the slats have an intumescent infill that swells under heat and seals the opening.
Does the grille stop cold smoke?
No – the grille reacts to heat, so cold smoke can pass in the early stage of a fire. Where the design also requires smoke protection, another solution is needed, such as a damper linked to the fire alarm.
Can a grille be fitted into an existing fire door?
Only if the door manufacturer has tested and approved such an installation – otherwise the door loses its rating. The safest option is to order the door with the grille factory-fitted.
Related products
Smoke vents
Roof domes and vents that release smoke and heat in a fire – also for ventilation and roof access.
Describe what you need or paste the items from your bill of quantities. We reply to emails within two hours on working days and send quotations the same day, or within 24 hours at the latest.
