The Midtherm Wall Band Extension Kit 75–200mm Black Twin Wall Flue is designed to increase the stand-off distance between a twin wall flue system and the wall, allowing installations to achieve the correct spacing for safety, airflow, and structural alignment. With an adjustable range of 75–200mm, it provides installers with the flexibility needed to tailor the clearance precisely to the demands of the project. Its black finish integrates seamlessly with modern HT-S systems, ensuring both functionality and a uniform visual appearance.
Each kit includes a pair of robust extension arms engineered for compatibility with all Midtherm wall bands, regardless of flue diameter. This makes it a practical accessory for systems that require additional room for maintenance access, routing around obstacles, or accommodating thicker external wall materials. The extension arms provide stable, rigid support once fitted, delivering confidence in both residential and commercial environments where accurate spacing is essential.
Manufactured to withstand high-temperature operation up to 450°C and produced to the same standards as the full HT-S range, the extension kit is built for reliability and longevity. Suitable for a wide variety of multi-fuel, gas, oil, biomass, and pellet installations, it carries full certification and forms part of a system backed by a 20-year warranty for registered setups. Its durability, adaptability, and professional finish make it a valuable addition to any high-performance flue installation.
Features and Benefits
- Adjustable 75–200mm wall clearance
- Black powder-coated finish for consistent appearance
- Compatible with all Midtherm wall bands
- Provides secure, rigid extension support
- Rated for continuous 450°C operation
- Suitable for solid fuel, gas, oil, biomass, and pellet systems
- Ideal for increased airflow or obstacle clearance
- Class 1 Twin Wall compliant
- Built to ISO 9001 and CE standards
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