Home > Companies > Lorient Polyproducts Ltd > High Performance Vision Style Grilles

Heavy duty intumescent air transfer grilles designed for use in the aggressive environments often found in industrial premises.

Features and benefits:

  • Can be used to provide fire resistance of up to 180 minutes.
  • Complete seal achieved in approximately two minutes when tested in accordance with with BS 476: Parts 20 and 22.
  • Exhibit excellent airflow characteristics and give silent efficient operation with normal to high air velocities.
  • Can be used in ducting where the steel and aluminium casing protects the intumescent material from the corrosive effect of hot gases travelling at high velocities.
  • Can be used in high humidity.
  • Have a steel frame which contributes to fire resistance by preventing the inward deformation of surrounding structures thus protecting the intumescent materials.
  • Are resistant to vibration damage.
  • Are suitable for horizontal and vertical applications.
  • Are suitable for external applications.
  • Suitable for use in numerous applications - doors, walls, ducts, floors and ceilings.
  • Holds CERTIFIRE CF564 certification.

Related literature

The following content references this product:

Standard product features


  • LVH44 / LVHC44: 44 mm thick.
  • LVH54: 54 mm thick.

Free area

  • LVH44: 60% approximately.
  • LVH54: 60% approximately.
  • LVHC44: 60% approximately.
  • LVH20S: 30% approximately.
  • LVH44S: 30% approximately.



Grilles are available in a range of widths and heights from 100–600 mm. Larger sizes can be produced dependent upon application - please refer to Lorient's Technical Department. Circular grilles are available in diameters up to 600 mm.

Smoke control system:

The LVH20S and LVH44S are designed to be used with the Talkback smoke control system. The Talkback system can control up to sixteen dampers/ shutters and features a status monitoring display.

NBS Specification

NBS Create logo
This product is associated with the following NBS Create clause:
90-45-25/445 Intumescent fire and smoke dampers

Product specification

An important note about specifying



Lorient Polyproducts Ltd


+44 (0)1626 834252

Product reference

[Lorient High Performance intumescent fire damper Ref: LVH44]
[Lorient High Performance intumescent fire damper, circular Ref: LVHC44]
[Lorient High Performance intumescent fire and smoke damper Ref: LVH20S]
[Lorient High Performance intumescent fire and smoke damper Ref: LVH44S]

Fire resistance

[60 minutes]
[90 minutes]
[120 minutes]
[180 minutes]


[Not required]
[For LVHC44 damper]
[As drawing ___]
[100 mm]
[200 mm]
[300 mm]
[400 mm]
[500 mm]
[600 mm]


[Not required]
[As drawing ___]
[200 x 200 mm]
[300 x 300 mm]
[400 x 400 mm]
[450 x 450 mm]
[500 x 500 mm]
[600 x 600 mm]


 - Grille:
[Not required]


[Pressed steel]


[Natural satin anodized]
[Primed for site painting]

Fitting: Screwed and bedded in Lorient intumescent mastic.

 - Mastic colour:

Smoke control system

[Not required]

Manufacturer details

Endeavour House,
Fairfax Road,
Heathfield Industrial Estate,
Newton Abbot,
Devon, TQ12 6UD
Tel +44 (0)1626 834252
Fax +44 (0)1626 833166
NBS Plus