Double-wall 25 mm Standard
Purpose: To remove the products of combustion from the combustion space to the atmosphere
Fuel: Oil, gas, solid (except fuel the amount of sulphur of which is ≥ 0.2% according to the mass) and solid fuel without using peat and charcoal
System marking according to EN 1856-1
Ø 80-300 mm, T450-N1-D-Vm-L20(050-100)-G70
Ø 350-450 mm, T450-N1-D-Vm-L20(060-100)-G105
Ø 500-600 mm, T450-N1-D-Vm-L20(060-100)-G140
T450°C – maximum operating temperature
N1 – natural draught
D – dry operating conditions
Vm – resistant to corrosion
G – resistance to soot fire
70;105;140 – distance to combustible materials
Flue liner - L20 – stainless steel 1.4301
Ø - 80-200 mm – 0.5; 0.6; 0.8; 1.0 mm
Ø - 250-550 mm – 0.6; 0.8; 1.0 mm
Ø - 600 mm – 0.8; 1.0 mm
The outer pipe – stainless steel 1.4301
The outer pipe – stainless steel 1.4509
The outer pipe – painted stainless steel 1.4509
Insulation – injected mineral wool, thickness -25 mm, density 180 kg/m3
Double-wall 25 mm standard chimney benefits
- Broad fuel compatibility.
Works with oil, gas, and most solid fuels (excludes peat, charcoal, and high-sulphur fuel). - Dry-condition design.
Rated for dry operating conditions, ideal for standard household setups. - Reliable insulation.
25 mm mineral wool (180 kg/m³) for safe, efficient performance. - Sizes for every need.
Available from Ø80 to Ø600 mm. - Solid stainless build.
Flue liner in 1.4301 steel, outer pipe in 1.4301 or 1.4509. - Certified safety.
Meets EN 1856-1, with corrosion and soot-fire resistance built in.
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