ALEXANDRIA, Va. — The North American Insulation Manufacturers Association (NAIMA) has partnered with the HVACR department of Fortis Institute in Palm Springs, Florida, to provide comprehensive, ...

Ducts are made of segments of sheet metal, or combinations of sheet metal, duct board and flex duct. Between the sections and at the elbows there are joints which are simply bent, crimped, or screwed ...

In 2006, the Olympia School District (OSD), of Olympia, WA, had enough of being burdened with outdated mechanical and electrical systems at its Reeves Middle School. Though some new mechanical and ...