Fibrous glass ducts are light in weight and can be supported with a minimum of hangers. Care must be taken as to placement of hangers and support. Details may be found in Section VI of the NAIMA Fibrous Glass Duct Construction Standard.

Note: NAIMA Fibrous Glass Duct Construction Standard (AH116) is applicable to all types of duct construction. For residential construction, NAIMA Fibrous Glass Residential Duct Construction Standard (AH119) may be used.