All-in-one Phenolic Foam Air Duct is composite with aluminium foil, phenolic foam, fiber reinforcement and painted steel. It has all the advantages of both traditional GI air duct and phenolic foam air duct with aluminum foil on both sides:
Low thermal conductivity ensures excellent insulaiton property
Light weight for handing and transportation
Good shock resistance & Fire Resistance
Easy Fabrication and quick installation
Good weather resistance
Life time more than 30 years
Uniform in appearance of finished and installed air ducts.