Safe4 ® Kitchen Extract Ductwork

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.


Safe4 ® 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.

Safe 4 ® is installed with two wraps of insulation, each wrap with a depth of 38mm.

Safe4 ® Cleaning Doors EN 1366-1

Safe4 ® 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

Safe4 ® Kitchen Extract is comprehensively tested to satisfy all code requirements

  • EN 13501-3 Classification
  • EN 1366-1 with Safe4 ® Cleaning Doors

Fully Tested

Safe4 ® Kitchen Extract is tested in a flexible wall with:

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


All Safe4 ® 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
Safe 4 Duct Kitchen Extract Ductwork logo
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All Safe4 ® products are fully tested and compliant across all international codes. 

Additional Information

  • Safe4 ® is manufactured from Galvanised Steel, and uses flanges and stiffeners, without paints or coatings.
  • Safe4 ® 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. Safe4 ® is suitable for installation in flexible walls (Plasterboard) and aerated concrete floors, having been tested in both.
  • All installers are trained by Safe4 ® to understand the risks and to follow the correct installation methods to ensure installation is as tested.
  • 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.