Lindab Thor Duct ® Kitchen Extract Ductwork

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Kitchen extract poses a specific risk due to the presence of combustible contaminants, namely grease, inside the ductwork. When a kitchen extract passes through multi-compartments, there is a risk from a fire in a compartment outside the kitchen. This can cause the grease inside the duct to ignite, and the fire to spread throughout the building.

Compliance with EN 1366-1

Includes testing ducts under “Type A” fire, with measuring devices thermocouples inside the ductwork and inside the furnace, under full 1100°C temperatures.

The insulated ductwork is examined to see how many minutes it can maintain the duct temperature below 180°C on any one thermocouple, or below 140°C as a mean average of all thermocouples.

Insulation

Lindab Thor Duct ® Kitchen Extract is insulated using a calcium magnesium silicate blanket which maintains the duct temperature below 180°C and prevents grease igniting and causing fire to spread throughout the building.

Lindab Thor Duct ® is installed with two wraps of insulation, each wrap with a depth of 38mm.

Lindab Thor Duct ® Cleaning Doors EN 1366-1

Lindab Thor Duct ® Cleaning Doors have been tested to EN 1366-1 and are suitable for kitchen extracts. Cleaning doors are required every 2 linear meters. We strongly recommend a routine cleaning regime by specialist contractors.

Compliance with EN Code

Lindab Thor Duct ® Kitchen Extract is comprehensively tested to satisfy all code requirements.

  • EN 13501-3 Classification
  • EN 1366-1 with Lindab Thor Duct ® Cleaning Doors

Fully Tested

Lindab Thor Duct ® Kitchen Extract is tested in a flexible wall with:

  • Insulated and uninsulated
  • Horizontal and vertical orientations
  • Fire types A and B
  • Square & round orientations

Installation

All Lindab Thor Duct ® Kitchen Extract systems are installed by third party certified installers and are suitable for installation in:

  • Stud partition
  • Block wall
  • Concrete floors
  • Full Penetration seal details are provided for floors and walls

Product Sizes

  • Square standard maximum size of 1250 X 1000
  • Round up to 1000 Ø

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Licensed Manufacturer

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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.

Fully Certified & Accredited

Lindab Thor Duct ® has been tested to the latest EN standards and as required by law, provides CE marking on products where a harmonised standard exists.

accreditation CE
accreditation Certifire

Whilst Lindab Thor Duct ® makes every effort to reflect the industry wide understanding of fire resisting duct standards, we do not suggest replacing a thorough research of CEN documents with our Blog posts.  We make every effort to be accurate and true, and, as the passive fire protection industry experience and knowledge grows, we may update our guidance to reflect this.  The design, selection, and supervision of fire strategies must always be managed by qualified Fire Engineers.

[email protected]

Ireland – Lindab (Irl) Ltd.

U2B, Nangor Road Business Park, Nangor Road, Dublin, D12 W97P

UK – Lindab UK

Units 9 & 10, Carousel Way, Riverside Business Park, Northampton, NN3 9HG

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Thor Duct ® was formerly known as Safe 4 ® Fire Duct in the UK and Ireland.

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