CL Ward: Access Doors For Round and Flat Duct Work (One page PDF) Design Polymerics: DP 1015 and DP 1030 water based duct sealants
Duro Dyne: Air Regulation Control Equipment (12 page PDF) Leader: Model D Series 205 Dynamic Fire Damper (One page PDF)
Stamped Fittings: The Edge, Self-Sealing Round Duct System (18 page PDF) Duro Dyne: Dyna-Tite Suspension System (Eight page PDF)
ATCO: Flexible Duct Systems Seal-Tite: Duct, pipe, and fittings
CL Ward: Snap-Lock pipe, elbows, take-offs SPIDA, Org.: Spiral Duct Manufacturers Association
Metal Aire: Spiral Pipe Diffuser Metal Aire: GRD's