As recently as 40 years ago, the process of fabricating ductwork was incredibly time-consuming. Skilled tradesman known as “tin knockers” individually laid out each galvanized component using templates made of plywood, metal, or cardboard. They’d take a template and sketch out the location of parts on the raw steel before wielding hand and electric tin snips to cut the parts out.

Mestek Machinery’s ISM brand has a new website at www.ismmachinery.com. The site has the ductwork fabrication machinery company’s spiral, round and oval HVAC ductwork equipment and fittings, including specifications and videos in a redesigned mobile-friendly layout, the company said.  

Spot welding looks simple and easy until your products fall apart while being delivered to the job site.

SPIDA — aka the Spiral Duct Manufacturers Association — is a nonprofit organization promoting the use of spiral-seamed round and flat-oval duct through research and education.