The Sheet Metal and Air Conditioning Contractors’ National Association (SMACNA) has published the fourth edition of its HVAC Duct Systems Inspection Guide.

This is where the basics of sheet metal fabrication come in. Fabrication is the process of cutting, bending, and shaping metal into usable forms. Whether it’s a roofing panel, ductwork for HVAC ...

The system consists of Phenolic Pre-insulated Duct Panels, fabrication methods, jointing systems and a complete line of accessories to produce a System where air leakage can be reduced to a fraction ...