A single-wall system used as a flue liner for open combustion chamber stoves or connection components for chimneys with insulation. This makes it possible to upgrade boiler rooms and adapt old chimneys to new operating conditions. It is available in two versions: Premium – for gas, oil, wood, pellets and Standard – for gas and oil boilers. The system is suited for dry operation at temperatures of up to 450 degrees Celsius. It is also available in oval and rectangular versions.