The vast majority of installations specifying flexible closed-cell elastomeric duct liner have been for traditional rectangular duct. But liner is being used on spiral duct HVAC construction projects.

Spiral Duct Manufacturers Association (SPIDA) members often fabricate an inventory of standard lengths of round spiral ducts. These are fabricated not only for their own use, but may also be inventory ...

Sparks flew at a new factory in Pittsburg on Monday, where a skeleton manufacturing crew christened a state-of-the art assembly line designed to shape and weld massive steel pipes used to transport ...