The spiral ducts are Air Movement and Control Association International ... lipped EPDM rubber gasket that provides an independently tested high-performance Sheet Metal and Air Conditioning ...

Northeastern Sheet Metal Inc. of Goffstown, N.H., recently purchased a spiral duct elbow machine from Standard Sheet Metal Machinery of Cedar Rapids, Iowa. NESM officials said they bought the model SE ...

Nathan Allred shared how he became a sheet-metal apprentice and what the benefits ... He said a highlight was working with the spiral machine, which creates spiral pipe duct using coils typically ...