During the combustion process, cold external air flows through the air-carrying tube. Single-walled, non-insulated tubes thus cool down within a short space of time.
Condensation and/or water droplet formation on the combustion air supply line. This problem is countered by using CB alu insulating flexible tubes (coloured coating).
The elaborately designed CB alu insulating flexible tubes comprise 5 layers:
The TR_OL 2012 (technical regulations for stove and air heating construction) states:
»5.3 Insulation of combustion air lines: to prevent condensation of room humidity, accessible lines must be sufficiently insulated.«
In some countries it must be possible to check and inspect supply air lines.
All alu flexible tubes are packed in premium cardboard boxes to allow, amongst other things, remaining lengths to be repackaged and used for subsequent assembly.
Outside air grill Double valve LAS-connector Connector for separate shaft
Plug-in connector Alu flexible tube reducers