Acoustic, smoke & fire containment systems

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LVH high performance door dampers

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

Lorient LVH high performance grilles are manufactured using Z275 grade galvanised steel, suitable for external applications. Additionally, the surfaces of fixing points are treated with a corrosion resistant coating, giving them a highly durable finish.

Key benefits

  • Allows free airflow at ambient conditions to provideup to 240 minutes fire resistance and limits the spread of hot smoke.
  • Slim-line, heavy steel construction.
  • Low maintenance.
  • Contains no moving parts.

Standard sizes

300mm x 300mm
450mm x 450mm
600mm x 300mm
600mm x 600mm

Supplied as complete kits including two steel cover grilles, fixings and a tube of Lorient intumescent sealant.

Gap sizes

11mm - 24mm*.

Please refer to our technical brochure “Retrofit Sealing Solutions for Noncompliant
Fire Door Assemblies” regarding maximum allowable gap sizes.

Fixing method

Perimeter caulked with Lorient intumescent sealant and sandwiched between the supplied steel cover grilles.


Fire tested in accordance with AS1530.4 and approved for use on major AS1905.1 proprietary fire door types for up to 4 hours fire resistance.

Intumescent Sealant Lorient intumescent sealant is an integral part of Lorient’s approved i... Read more