Specflue DW30 has been specifically designed to meet the requirements of today’s clean burning multi-fuel appliances. The system provides an economical and robust twin wall insulated stainless steel chimney system offering high material specification, design, manufacturing quality, thermal performance and ease of installation. It is suitable for negative draught conditions where the maximum continuous flue gas temperature does not exceed 600°C and is soot fire rated at 1000°C.

Suitable For

  • Gas, Wood, Oil, Solid Fuel, Multi-Fuel
  • Pellet Appliances
  • Woodburning Stoves
  • Biomass Appliances
  • Non-condensing Boilers/Appliances


  • Internal Diameters of 130mm & 150mm with stainless steel or matt black outer case
  • Easy to use Push-Fit design with locking bands
  • Corrosion resistant 316L inner liner
  • 25 year conditional warranty

Technical Data

Continuous Firing Temperature 600°C
Thermal Shock 1000°C
Mode of Operation Zero and Negative Pressure
Outer Case 411L: 1.4509: 0.45mm Stainless Steel
Outer Case Thickness 0.5mm
Outer Case Seam Laser or Inert Gas Welded
Liner 316L: 1.4404 : 0.45mm Stainless Steel 
Liner Thickness 0.5mm
Liner Seam Plasma TIG Fully Welded
Insulation High Performance Mineral Fibre/Rock Wall
Insulation Thickness 30mm
Distance to Combustibles 60 mm


Internal Diameter (mm) 130 150
External Diameter (mm) 190 210


Specflue DW30 is CE Certified to BS EN 1856-1 T600 N1 D V2 L50050 G60 with designations:

System Chimney BS EN 1856-1
T600 N1 D V2 L50050 G60
60mm distance to combustibles in a combustible shaft

  Filename Format  
DW30 Brochure DW30 Brochure .PDF
DW30 Declaration of Performance (DoP) DW30 Declaration of Performance (DoP) .PDF