Lindab Thor Duct ® Fire Ductwork

Lindab Thor Duct ® Fire Ductwork helps maintain pressurisation systems and ensures compartmentation. The integrity of the duct and its ability to function must be maintained in the event of a fire.

Passive ducts, specified as fire ducts, are tested to EN 1366-1. Lindab Thor Duct ® Fire Ductwork meets all of these requirements and is the most suitable choice. Lindab Thor Duct ® Fire Ductwork has been tested with insulation, and is classified to standard EN 13501-3.

Lindab Thor Duct ® Fire Ductwork is a non-coated system, suitable for installation in multi-compartment, single compartment, stud wall, solid wall, and aerated concrete floors. A comprehensive set of support bracketry is provided. Penetration seals guidance is provided with detailed drawings.

Compliance with EN Code

Lindab Thor Duct ® Fire Ductwork is comprehensively tested to satisfy all code requirements.

Fully Tested

Lindab Thor Duct ® Fire Ductwork tested with:


All fixing and support components fully tested to EN standards.
More information on installation standards below.

Product Sizes

Looking to Specify?

All Lindab Thor Duct ® products are fully tested and compliant across all international codes.

Additional Information

  • Lindab Thor Duct ® is manufactured from Galvanised Steel, and uses flanges and stiffeners, without paints or coatings.
  • Lindab Thor Duct ® is insulated using a calcium magnesium silicate blanket.

Both the product and the insulation have been tested as a system in accordance with test standards which includes access doors, silencers and bracketry.

All tests were conducted in EOTA approved laboratories, and each licenced manufacturing location has a factory production control (FPC) in placed to ensure exacting standards of manufacture.

You can be 100% sure that your installation has been properly managed and is fit for purpose when called upon in the event of a fire.

  • Penetration seal detail is provided for floors and walls. Lindab Thor Duct ® is suitable for installation in flexible walls (Plasterboard) and aerated concrete floors, having been tested in both.
  • Our installers in Ireland and the UK comply with local guidance and are all members of third party certification schemes.
  • In mainland Europe, installers comply with certification schemes where available.