Description: The Eastern Sheet Metal Equivalent Round Duct Calculator app allows sheet metal contractors, installers, HVAC engineers, and contractors to quickly convert rectangular and flat oval duct ...

Officials with Streimer Sheet Metal Works Inc. of Portland, Oregon, said they believe that spiral is the most efficient means of producing steel air-handling ductwork. Streimer has observed that ...

Homeowners want the best performance from their ducts and sheet metal ducts still provide the most durable, efficient and clean air distribution system. In addition to offering superior air flow, the ...