Thermal lining of a chimney or ventilation duct.

摘要

1. The thermal lining of a chimney or ventilation duct is made of thermal insulator. Characterized in that: It has the form of a sleeve, made of acid resistant aluminium foil (2), externally coated with fusible polypropylene foil (3), inserted into a glass-fibre sleeve (4). Both sleeves are inserted into a sleeve made of polyethylene foil (5).