CONSTRUCTION FEATURES
Flexible soundproof insulated duct.
Sound-absorbing duct consisting of a harmonic steel spiral wrapped in a micro-perforated 74ฮผm aluminium/polyester laminate. Insulating mat in fibreglass with a density of 18 kg/mยณ and a thickness of 25 mm.
External covering in 49ฮผm aluminium/polyester.
B-s1, d0 certified according to EN 13501-1
