Schiedel 5″ (125mm) – 6″ (150mm) Internal Diameter ICID Plus Increaser
The ICID Plus 125-150mm Increaser is designed to connect a 125mm ECO ICID flue to a 150mm ECO ICID flue, allowing seamless up-sizing of the system. It features a durable stainless steel finish for a clean appearance and long-lasting performance.
This increaser is part of the ICID Plus twin wall flue system, built with advanced corrosion resistant construction. It includes a laser welded 316L stainless steel inner liner and a stainless steel outer casing for reliable, long-term use. The system is insulated with 25mm of high-density rockwool to maintain flue gas temperature, maximise efficiency, and minimise condensation.
All components connect using a twist lock bayonet jointing system and are secured with a locking band. A rubber joint seal is included, making the increaser suitable for use with condensing and biomass appliances.
The ICID Plus twin wall insulated chimney system is designed for open and closed stoves operating at temperatures up to 450°C. The load-bearing outer casing supports the structure while allowing the inner liner to expand independently, safely accommodating thermal expansion at every joint.
About ICID Plus
ICID Plus, manufactured by Schiedel, is a versatile twin wall chimney system designed for a wide range of domestic and commercial applications. It is suitable for Dry, Wet, and Positive Pressure installations and supports multiple fuel types.
Compatible appliances include gas, oil, wood, multi fuel, traditional stoves, pellet stoves, biomass systems, mini and micro CHP units, and condensing boilers designed for positive pressure operation.
Key Features of ICID Plus
- Internal diameters available in sizes 125mm and 150mm
- Secure twist lock bayonet jointing system with locking band
- High corrosion resistance using a laser welded 316L stainless steel inner liner and stainless steel outer case
- 25mm high density mineral wool insulation to maintain flue gas temperature, improve efficiency, and reduce condensation
- Low external surface temperature for enhanced safety
- Inner liner designed to allow maximum thermal expansion and prevent moisture ingress
- Lifetime guarantee for long term peace of mind
ICID Plus delivers reliable performance, advanced engineering, and long lasting construction, making it an excellent choice for a wide range of heating and flue system applications.






