Extend the capabilities of your flue system with the Midtherm HTS Twin Wall Flue – Extension Length (75-350mm). This precision-engineered component of two pieces offers a seamless extension of 75mm to 350mm when attached to a standard flue length, ensuring flexibility and convenience for your installation needs.
Key Features:
- Adjustable Extension: Designed to work with standard lengths, this extension provides a range of flexibility. It can be used on lengths starting from 500mm, with a minimum extension of 260mm when used with a 300mm section.
- High-Quality Construction: Made from premium 0.5mm stainless steel (316 2b inner and 304 BA outer), it offers durability, corrosion resistance, and a sleek, modern finish.
- Insulated Performance: Sold fully insulated for optimal safety and efficiency in high-temperature applications.
- Convenient Installation: Includes a special locking band for secure, consistent connections, making assembly straightforward and reliable.
- Compatibility: Perfect for use with wood, multifuel, gas, oil, biomass, and pellet systems, offering versatility for various heating applications.
Performance and Certification:
- Rated for 450°C operating temperatures with a 4-hour fire rating.
- CE Certified, manufactured under ISO 9001 quality systems, and HETAS registered for assured performance and safety.
Durability You Can Trust:
The Midtherm HTS Twin Wall Flue system comes with a 20-year warranty (available for registered and properly maintained installations), ensuring long-lasting performance and peace of mind.
Joint Type
Push fit socket and spigot type joint, to be installed with a locking band in place.
Note: Images show the extension length paired with a standard flue length for reference.
Downloads:
- Specification Sheet/ Manual: Midtherm_HTS_manual
- Brochure: QF-34-08-BRO24A
- Warranty: QF-34-08-WARA-23A-1






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