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Intumescent Grilles for windows (SVG & HMG)

Product 150


A range of fire and smoke resistant vent grilles for UPVC or metal door and window frames

Not available to purchase online.

We need to ask you a few more questions and ensure this is the suitable product for your needs.

To order please call us on +44 (0) 1 304 842 555

£0.00 ex. Vat


Ventilation Grilles for Windows

Intumescent Grilles for windows and doors.

Provides complete fire as well as smoke protection, in addition to improved ventilation.

When opened or closed, the multi-directional intumescent Grilles for windows expand and seal spaces to contain fires before they spread. Therefore providing one hour of fire and smoke protection.

Two sizes and two types are available.

  • Type C for use in metal casement frames above windows, thus giving ventilation to the ceiling above.
  • Type W is for use directly into the glazing of a bathroom or kitchen window. See the order references tab for more information.

All grilles tested to BS476 Part 22 1987.

Specially designed passive fire range to meet Document B of Building Regulations, and also tested to European Standards. For more information, browse our full range of ventilation products online.

Envirograf ® passive fire products carry the hallmark of excellence, reflecting the high standards that prevail in its laboratory, test rig, and manufacturing plant. Envirograf® passive fire products are subject to rigorous quality control which, at all stages, ensures products remain at the leading edge of fire containment technology. This quality has earned the company and its passive fire products a high reputation. With its operating system accredited to ISO9001.


– SVG suitable for ventilation for all UPVC frames but especially useful for areas such as kitchens and bathrooms

– HMG designed to fit into head reveals on metal cased windows, or into windows such as in fire escape corridors, bathrooms and kitchens

– Both types are fitted with intumescent which will expand in a fire, sealing the grille whether it is in the open or closed position

Application Instructions

SVG metal grille available in two standard sizes or can be made to suit. Fit in the frame head over uPVC windows at time of installing windows. Particularly suitable for bathroom and kitchen windows.

HMG metal grille available in two options. Option /C for use in metal casement frames above windows giving ventilation to the ceiling above – a single section screwed in place. Option /W fitted directly into the glazing of a bathroom or kitchen window – two sections screwed together either side of the hole.

Order References / Sizes

SVG Grilles       

Ref                         To fit aperture size (W x H x D) 

SVG360                 360mm x 100mm x 100mm

SVG900                 900mm x   75mm x   60mm

HMG Grilles

Ref                         Size

HMG1                    280mm x 110mm

HMG2                    280mm x 140mm