Insulated Spiral Duct Systems
Roladuct produces an extensive range of internally insulated spiral duct in round and oval forms for conditioned air handling.
Both round and oval insulated duct and fittings are double walled, consisting of an outer pressure tight shell, a layer of fire resistant or acoustic glass fibre or similar insulation and an inner liner of perforated metal.
Both inner and outer liners are manufactured from our 4 ply lockseam ductwork utilising premium grade zinc coated steel or aluminium.
Where only thermal insulation properties (and not acoustical) are a factor, insulated duct is optionally available with unperforated internal liners.
Insulation is available in the following thicknesses:
Method 1No Capping
Internal & External Joiner
Method 2Flanged Joint
Method 3Flanged Joint