Schiedel ICS

ICS 5000 Flue System

Multi-functional twin wall insulated venting system for use on heating appliances, stand-by gensets, CHP and service ducting.

ICS 5000 flue system

Fire resistance classification

ICS 5000 flue system

Schiedel has recently successfully carried out fire resistance tests according to the latest European standard EN 1366-13:2019 “Fire resistance tests for service installations, Part 13: Chimneys” and has reached EI 120 classification for our Double Wall Insulated System Chimney ICS in a closed scenario (type A) for both vertical and horizontal set-ups.

Schiedel is the first European chimney manufacturer to have performed the tests according to this latest fire resistance standard for chimneys.


ICS 5000 is a multi-functional twin wall insulated venting system, which is suitable for internal and external use on a wide range of engineering, combustion and process equipment, including heating appliances, diesel generators, CHP systems and service ducting.

ICS 5000 comes with a high quality specification as standard with a 316L Grade Stainless steel liner, high performance mineral blanket insulation and a bright annealed 304 Grade stainless steel outer case.

Both liner and outer case have a continuous seam welded joint and each flue gas bearing component has a uniquely profiled spigot and socket joint with bevelled end forms to ensure ease of installation whilst ensuring the joint meets H1 performance criteria at 5000 Pa.

The thermal insulation blanket ensures continuous insulation over the entire effective length of the liner, ensuring fast priming to normal operating temperatures, whilst maintaining low external surface temperatures.


  • Engineered spigot and socket joint
  • Pronounced lead in edge
  • Quick and easy assembly
  • Pressure gasket on outer case protected by insulation
  • Continuous insulation avoids thermal bridging
  • Inner liner free to expand and contract
  • No requirement for expansion joints
  • Lightweight
  • No onsite welding or cutting required

Horizontal installation example with silencers

Vertical installation example with silencers

Schiedel BIM Catalogue

A range of Schiedel Products for Commercial and Residential are now available within our new 3D BIM (Building Information Modelling) Catalogue.

Engineers, planners and architects now can have an significant influence on making Schiedel the choice of the chimney at the beginning of the planning process, with the comprehensive data available for a range of components.

All BIM and AEC CAD formats, like Autodesk Revit, Nemetschek Allpan and Grafisoft Archicad for the respective CAD systems are available to engineers, planners and purchasers for free. You can add these formats under your own account section. Schiedel BIM is free to use and you just need to enter your email address to register and download your formats (for free!).


Fuel Diesel generators, gas, oil
Firing temp 600°C
Continuous Firing temp 600° C
Short Firing temp 700°C
Thermal Shock 1000°C
Mode of Operation High Positive Pressure 5000 Pa (H1)
Pressure Capabilities 5000Pa
Fire Rating 4 Hours Fire Rating to BS 476 Part 20
Outer Case 304 : 1.4301 : X5CrNi 18-10
Outer Case Thickness 0,5mm (Ø130-Ø300), 0,6mm (Ø350-Ø600), 0,7mm Ø650-Ø700)
Seam Fully seam welded
Liner 316L : 1.4404 : X2CrNiMo 17-12-2
Liner Thickness (mm) 0,5mm (Ø80 -350), 0,6mm (Ø400-Ø600)
Insulation High performance mineral fibre
Insulation Thickness 25mm or 50mm
Average Thermal Resistance (200°C) 25mm 0.4 m2k/W, 50mm 0.6 m2k/W


Chimneys are subject to significant corrosion attack by flue gas condensates, particularly from solid fuel and condensing appliances. ICS is specifically designed and manufactured to resist this  corrosion. It is the only stainless steel chimney system in the world to have passed the internationally recognised Gastec corrosion test.


The chimney size should be as recommended by the appliance manufacturer. Where there is a requirement for a flue diameter smaller than the appliance spigot, then the operational requirements of the appliance and the configuration of the flue must satisfy the flue sizing requirements of BS EN 13384-1 for single appliances.

System Chimney BS EN 1856-1 (TÜV 0036 CPR 9195 027)
ICS25 5000 ICS50 5000
T600 H1 D V3 L50050 O75* T600 H1 D V3 L50050 O25*
T200 H1 W V2 L50050 O50**
*Distance to Combustibles *Distance to Combustibles
*Ø80-Ø300 distance – 75mm *Ø80-Ø300 distance – 25mm
*Ø350-Ø450 distance – 112.5mm *Ø350-Ø450 distance – 37.5mm
*Ø500- Ø600 distance – 150mm *Ø500- Ø600 distance – 50mm
**Ø80-Ø200 distance – 50mm


Connecting Flue Pipe BS EN 1856-2 (TÜV 0036 CPR 9195 038) Connecting Flue Pipe BS EN 1856-2 (TÜV 0036 CPR 9195 036)
T600 H1 D V3 L50050 O100 M T600 H1 D V3 L50050 O100 M


EI 120 Fire rating to BS EN 1366-13 Chimneys
ICS25 5000 ICS50 5000
Horiziontal and Vertical Horiziontal and Vertical


BS 476 part 20 (4 Hour Fire Rating)
ICS25 5000 ICS50 5000


Corrosion testing on Gas, Oil, Solid Fuel (TÜV 0036 CPR 9195 027)
Gastec, MPA,TÜV


ICS 5000 brochure

ICS 5000 brochure

3.56 MB

ICS 5000 Installation Instructions

ICS 5000 Installation Instructions

3.45 MB

ICS 5000 - Approvals

ICS 5000 - Approvals

3.54 MB

Get in touch for more information

Personal Data
Contact and inquiry

Maximum 10MB

Please note our data protection regulations, which are the basis for any use of data by Schiedel GmbH & Co KG.
Please wait...