Sonolight AD-L thermal-insulated ducts protect air against heat
loss inside the ventilation ductwork. The perforation improves
the sound-insulating performance of this duct model. The
product is based on the standard Aluduct and includes a 25 or
50 mm thick insulation with aluminium polyester cladding. It is
generally intended for building connections for plenum boxes,
air valves, or high-air-flow heat recovery ventilation systems.
