Spiral Manufacturing provides low-pressure sheet metal gauge construction for rectangular duct used in residential and light commercial HVAC applications. Their rectangular duct fittings are factory-fabricated in a broad range of standard sizes, with lengths up to ten feet to help reduce field assembly costs. Options include Pittsburgh Lockseam, Button-Punch Snap Lock, Ductmate connectors, Slip & Drive joints, four-bolt connectors, crossbroke ductwork, and custom rectangular fabrication. These products are built to meet or exceed SMACNA duct construction standards. Contact their team to request rectangular ductwork details for your project.