Thor Duct®
Kitchen Extract Ductwork
Kitchen extract poses a specific fire risk due to the presence of combustible contaminants, namely grease. Kitchen extract ducts that pass through multiple fire compartments on their way to the outside, are at risk of being exposed to a fire in those compartments. This is outside the kitchen compartment itself. The concern is that a fire will reach the kitchen ductwork that passes through the compartment and cause the grease inside the duct to ignite.
The protection offered by compartmentation is no longer certain as the fire may cascade along the route of the kitchen extract ductwork. The grease in question, due to the process of oxidation, has a low flash point of 180°C. The fire can spread back to the kitchen and all compartments enroute. Thor Duct® is a solution, based on the latest EN1366-1 requirements, tested with Insulation to delay a temperature rise of 180°C inside the ductwork.
Looking to Specify?
All Thor Duct® products are correctly tested and compliant across all European codes. If you would like an inhouse CPD, please contact us.
Compliance with EN1366-1
Includes testing ducts under “Type A” fire, with measuring devices (thermocouples) surface mounted inside the ductwork, inside the furnace, tested to the fire curve EN1363-1.
The insulated ductwork is examined to measure 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
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. This insulation was tested as a combined system (ductwork + Insulation) and evidenced by way of test reports and classification to the standard EN13501-3.
Thor Duct ® Cleaning Doors EN 1366-1
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
Thor Duct® Kitchen Extract is comprehensively tested to satisfy all code requirements.
✓ EN13501-3 Classification
✓ EN1366-1 with Thor Duct®
Cleaning Doors
Fully Tested
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
Thor Duct® Kitchen Extract systems are installed by third party certified installers and are suitable for installation in:
✓ Stud partition
✓ Block wall
✓ Concrete floors
✓ Detailed penetration
requirements provided in our
installation guides
Product Sizes
✓
Square standard maximum
size available up to 2500x
1250mm
✓ Round up to 1000 Ø.
✓ Performance of Ø ducts
differs from square ducts
Manufacturing Standards
- Thor Duct® is manufactured from Galvanised Steel, and uses flanges and stiffeners, without paints or coatings.
- 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 licensed manufacturing location has a factory production control (FPC) in place to ensure exacting standards of manufacture.
Installation Standards
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. 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.
