Chimney system suitability for particular cases must be decided taking into consideration the documentation of the heating appliance manufacturer, guide for mounting chimneys and national legal acts.

1 The actual minimum distance to combustible material from the outer surface of a connecting flue pipe (for flue liners isn’t applied) must be defined according to the designation of the product, as described in their marking, and national legal acts. If the legal acts and chimney designation indicate different distances to the combustible materials it is necessary to follow a bigger distance. 

Rigid Round flue liner system I-1


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System is designated to exhaust combustion products by natural draught from heating appliances. System is being used for relining of existing chimneys.


Oil, gas, solid fuels

Working temperature

≤ 600 °c


Stainless steel EN 1.4404

Wall thickness

When dn from 80 to 200 mm – 0.5, 0.6, 0.8, 1.0 mm
When dn from 230 to 550 mm – 0.6, 0.8, 1.0 mm
When dn from 600 to 900 mm – 0.8, 1.0 mm

Pressure class

N1 – natural draught

Sootfire resistance

G – resistant

Distance to combustible materials

≥ 5001mm

Condensate resistance

W – designated for wet operating conditions

Certificate no.


Designation code

EN 1856-2 T600-N1-W-Vm-L50050-G(500)
EN 1856-2 T600-N1-W-Vm-L50060-G(500)
EN 1856-2 T600-N1-W-Vm-L50080-G(500)
EN 1856-2 T600-N1-W-Vm-L50100-G(500)