Midtherm HT-S is a Class 1 twin wall insulated flue system engineered for medium and high temperature applications across domestic and commercial installations. Suitable for gas, oil, solid fuel and biomass systems, it offers a versatile solution where performance, reliability and ease of installation are essential.
Manufactured using advanced welding and forming techniques, HT-S delivers consistent joint integrity and long-term durability. The precision socket and spigot jointing system ensures a close, uniform fit, while the locking band with over-centre clip provides a secure, gas-tight connection and fast installation on site.
Constructed from high-grade stainless steel, with a 316L inner liner and 304 outer casing, the system incorporates 25mm high-density mineral wool insulation to maintain thermal efficiency and safe operation at elevated temperatures.
With a smooth, modern appearance and flexible installation capability, HT-S is designed as a reliable, all-round system for a wide range of applications, including installations where no existing chimney is present.
Applications:
- Gas appliances
- Oil systems
- Solid fuel and multifuel installations
- Woodburning stoves
- Biomass and pellet systems
- Ventilation and extract
Key Features:
- Twin wall insulated construction
- Designed for medium and high temperature applications
- Precision socket and spigot jointing system
- Locking band with over-centre clip for secure installation
- Smooth external finish for improved aesthetics
- Suitable for internal and external installations
- Available in stainless steel or powder-coated finishes
Specification:
- Inner liner: 0.5mm 316L stainless steel
- Outer casing: 0.5mm 304 stainless steel
- Insulation: 25mm high-density mineral wool
- Maximum operating temperature: 450°C
- Diameter range: 100mm – 350mm
- Jointing: Push-fit socket and spigot with locking band