Space-Saving Fire Rated Ductwork for Modern Building Services
Thor Duct® Evo is an advanced evolution of the trusted Thor Duct® system—engineered specifically for compact plantrooms, service risers, and congested installations.
Designed to deliver EI60–EI180 fire performance while reducing weight and installation complexity, Thor Duct® Evo offers a smarter, more efficient solution for today’s space-constrained projects.
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.
Why Choose Thor Duct® Evo?
Thor Duct® Evo has been developed to address the growing demand for high-performance fire-rated ductwork in tighter spaces.
- Up to 30% less metal than traditional systems
- Up to 70% less insulation, reducing bulk
- Slimmer profile for confined or complex installations
- No external stiffening for improved spatial efficiency
- Factory-insulated for consistent quality and performance
Engineered for Simplicity On Site
Thor Duct® Evo is designed to streamline installation and reduce risk on site:
- Pre-insulated with 25mm calcium silicate wrap
- Durable silver foil encapsulation
- 30mm flange-to-flange connection
- No site-applied chemicals required at joints
- Simple collar system for secure jointing
- Reduced risk of installation errors
Performance & Compliance
Thor Duct® Evo meets the highest standards for fire and smoke performance:
- Fire rated: EI60 to EI180
- Tested to: EN 1366-1 & EN 1366-8
- Classified under: EN 13501-3 & EN 13501-4
- CE Marked: EN 12101-7
- Smoke classification: S
- Ventilation standard: EN 1507 (Class C)
- Tested at 600°C for up to 120 minutes
Versatile Applications
Thor Duct® Evo is suitable for a wide range of building services applications:
- Smoke control systems (multi-compartment)
- Fire-rated ductwork (Type A & B)
- Passive ventilation systems
- Pressurisation systems
- Projects requiring EI60–EI180 classification
- Retrofit and refurbishment projects
Designed for Modern Projects
With increasing pressure on plantroom space and service coordination, Thor Duct® Evo provides:
- Reduced system weight
- Simplified penetration details
- No requirement for plasterboard patrices
- Compatibility with tested:
- Access doors
- Drains
- Smoke grilles
Maximum duct size: 1250mm x 1000mm
Important Note – Kitchen Extract
Thor Duct® Evo is not currently optimised for kitchen extract systems.
- Achieves 44 minutes with combustible lining
- For full kitchen extract compliance, we recommend Thor Duct® 1.0
Speak to a Licensed Manufacturer
Planning a project? Our licensed manufacturing partners can help specify the right solution for your application.
A Smarter Choice for Space-Critical Projects
Thor Duct® Evo is ideal where space, weight, and installation efficiency are critical—without compromising fire performance.
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.
