23 3100 - HVAC Ducts and Casings

See also:
23 3130 - Fabric Ducts
23 3300 - Duct Specialties
23 3700 - Air Grilles, Outlets and Inlets

• AccuDuct Manufacturing - Spiral duct systems
• AES Industries
• Berner International Corporation - Air curtains, designed to save energy and create healthy, comfortable environments.
• CertainTeed
• EHG Duct - sound solutions for ductwork including round silencers, registers, and dust collection.
• GAF
• Hart & Cooley
• Johns Manville - JM has an extensive offering of HVAC & plumbing insulation including boards/liners/wraps and pipe fittings.
• Knauf Insulation - Knauf Eclipse™ Air Duct Board with ECOSE® Technology is designed for commercial and residential installations.
• Kroy Industries - below slab ducts
• Linx Industries - Linx Industries manufactures and distributes HVAC products, including ductwork and related products.
• McGill AirFlow Corporation
• NCA Manufacturing
• Norfab Systems
• Spiral Pipe of Texas

Related Associations and Reference Organizations

• Air Duct Council
• Sheet Metal and Air Conditioning Contractors National Association
• Spiral Duct Manufacturers Association
• Testing, Adjusting and Balancing Bureau