Intumescent Fire and Smoke Grilles
Rated 3.5/5 based on 11 customer reviews

Intumescent Fire and Smoke Grilles

Available: In Stock
  • Product SKU: Product 34-intugrill- 0
  • Category: Ventilation

    The Envirograf® TJ Grille offers full fire and smoke protection for openings in walls, ceilings and fire doors, or at the entry point of ventilation ducting. Automatically seals off in a fire and is available with a variety of resetting options.

    – Provides up to 73 minutes integrity- Can be wired into an existing 24V fire/smoke alarm system, or into an Envirograf® AC mains to 24V control unit. This unit can be used to control up to 3 TJ grilles
    – Four resetting options are available for the grille:
    (A) Manual re-set (by hand, with a screwdriver or knife) with a permanent loading of 125mA 24V
    (B) An automatic re-set grille with a permanent loading of 125mA, with a re-set loading of 6A 24V for a period of 1 second
    (C) A non-electrical grille containing a thermal breaker that automatically activates at 70ºC, moving the shutter to the closed position
    (D) A non-electrical grille containing a memory spring device that operates in the temperature range 50ºC to 65ºC, closing the shutter to fire and smoke in about 47 seconds

    The TJ grille can be fitted into doors, walls and partitions. Cut a hole in the door or wall to the sizes as
    quoted in the Order References – other sizes can be made to suit your opening (price quoted on request)
    The grille is fitted into the aperture and screwed to the wall, door or partition. The intumescent plate is screwed to the opposite side of the door, wall or partition to the main unit. This intumescent plate need not be fitted if the main unit is fitted in ventilation ducting. The plates can be supplied with open slots which allow viewing or louvered for non-viewing.



    This type is reset by pushing the internal plate back to its original position by means of pen or screwdriver. The plate is held open by an electro-magnet 24V 125mA.


    This type resets itself and has a permanent loading of 24V 125mA, with the solenoid to open the grille taking 24V 8A for 1 second.


    This type closes when the fire gets near the grille. At 55°C, a thermal link breaks and closes the shutter.


    This type closes when the fire gets near the grille. At 50°C to 65°C, the grille will close, but the spring returns to the open position after the fire is over.


    The grilles are supplied to be open normally and close up in a fire. However, all of these grille types can be made to be closed normally and to open in the event of a fire.


    Manual Reset and Automatic Reset grille options can be wired to a 24V alarm system. Alternatively, an Envirograf® mains to 24V control unit can be used to control up to 8 manual reset grilles or 3 automatic reset grilles. The control units have N O (normally open) and N C (normally closed) contacts to wire to the existing fire alarm or optional smoke detector.



    Internal Hole Size                External Size
    Ref Height x Width              Height x Width

    NTJ1             140 x 280mm                    200 x 340mm
    NTJ2            240 x 280mm                    300 x 340mm
    NTJ3            190 x 305mm                    250 x 365mm
    NTJ4            270 x 305mm                    325 x 365mm
    NTJ5            340 x 380mm                   400 x 440mm

    References shown for manual reset grilles only. Other grilles made to order...

    Standard finish is brown or white
    Other colours may be available.
    State colour requirements clearly when ordering
    Special custom sizes are non-refundable.

    SG/S - A smoke detector and base with terminals for wiring into a 24V fire alarm system and controlling the Envirograf® Smoke and Intumescent ventilation grille. This unit can slo be used with the Envirogarf® CTJ/1 control unit 24V.

    REF SG/S

    CTJ/1 - A 240V to 24V control unit for smoke and vent grilles. Should an existing fire alarm system not be capable of taking the smoke vent grille or no smoke detector circuit be installed? Envirograf® make a 240V to 24V reducing unit for connecting up to 3 smoke and vent grill units with terminal connections to feed to an Envirograf® SG/S smoke detector and connections to alert the fire alarm system if smoke is detected.

    REF CTJ/1 controls up to 3 TJ units.

    All of our 'in stock' product orders will be shipped same day, as long as the order has been processed before 3pm - this is simply to be in a position to catch the courier pickups.

    Some of couriers are explicit in their non-liquid deliveries so if you have ordered a mixture of ambient and liquid products your order has to be split across two couriers. These are lead by courier company policies, however the courier selection was done of price and so you can be safe in the knowledge that you will be getting the most competitive delivery prices around. 

    We deliver across the Island of Ireland and aim for 48/72hrs deliveries on all our orders. If you order a product that is 'out of stock' we will get them shipped by our supplier, Envirograf UK over night for our next days deliveries.