Rectangular Duct – Commercial Applications
Rectangular Duct – Commercial Applications

Punny HVAC Duct & Sheet Metal Work manufactures high-performance rectangular duct systems in full compliance with Canadian HVAC industry standards, including CSA and SMACNA guidelines. Backed by extensive industry experience and a modern, state-of-the-art manufacturing facility, we deliver precision-engineered ductwork tailored for commercial, institutional, and industrial HVAC applications across the Toronto market. Our rectangular duct systems are designed to meet stringent quality, performance, and durability requirements, ensuring dependable operation in demanding commercial environments.

All rectangular ducts are produced using advanced CNC-controlled machinery, including automated folding and shearing machines, plasma arc cutting systems, and automatic seaming equipment. This technology-driven manufacturing process ensures consistent dimensional accuracy, superior workmanship, and controlled air leakage performance for improved energy efficiency and indoor air quality. Fabricated from hot-dip galvanized steel sheets conforming to ASTM A653 specifications with a minimum G90 / Z275 zinc coating (275 g/m²), our GI ductwork offers excellent corrosion resistance, structural integrity, and long-term reliability for commercial HVAC systems. blades.

Rectangular Duct – Residential Applications
Rectangular Duct – Residential Applications

Punny HVAC Duct & Sheet Metal Work manufactures rectangular duct systems specifically engineered for residential HVAC applications, fully compliant with applicable Canadian standards, including CSA guidelines and SMACNA best practices. Utilizing a modern CNC-equipped manufacturing facility, our residential ductwork is precision-fabricated to ensure accurate fit, low air leakage, and quiet system performance—key requirements for energy-efficient and comfortable homes. The duct systems are designed to support balanced airflow, improved indoor air quality, and long-term reliability for single-family homes, townhouses, and multi-residential developments.

Our rectangular residential ducts are fabricated from high-quality hot-dip galvanized steel sheets conforming to ASTM A653 specifications, with a minimum G90 / Z275 zinc coating (275 g/m²) for superior corrosion resistance and durability. Advanced manufacturing processes, including automated folding, shearing, and seaming, ensure consistent quality and smooth airflow while meeting Canadian residential building and HVAC code requirements. The result is a durable, efficient, and code-compliant duct solution that supports optimal HVAC system performance throughout the life of the residence.