Spiral Manufacturing provides low-pressure sheet metal gauge construction for rectangular HVAC ductwork used in residential and light commercial systems. Their ductwork options include reinforced joints, connector details, Pittsburgh Lockseam, Button-Punch Snap Lock, and custom fabrication support. Contact their team to request sheet metal ductwork details for your project.
https://www.spiralmfg.com/low-pressure-sheet-metal-gauge-construction/
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