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AeroRound™ Galvanized Iron Round Duct Systems

Punny HVAC Duct & Sheet Metal Work proudly presents AeroRound™ Galvanized Iron Round Duct Systems, engineered to meet the highest Canadian HVAC industry standards, including CSA and SMACNA guidelines. Designed for both commercial and residential applications, AeroRound™ ducts deliver exceptional airflow efficiency, reduced pressure loss, and robust structural integrity. The circular design ensures uniform air distribution, minimizes turbulence, and supports energy-efficient operation while maintaining low air leakage and long-term reliability across a wide range of projects—from high-demand commercial, institutional, and industrial systems to single-family homes, multi-residential buildings, and custom residential installations.

Constructed from hot-dip galvanized steel sheets conforming to ASTM A653 specifications with a G90 / Z275 zinc coating (275 g/m²), AeroRound™ ducts provide superior corrosion resistance and durability. Advanced precision fabrication ensures accurate diameters, smooth internal surfaces, and leak-tight joints, with optional EPDM gaskets for enhanced airtightness. Available in diameters from 125 mm to 1600 mm and straight lengths up to 6 meters, AeroRound™ round ducts reduce the number of joints, simplify installation, minimize noise, and provide a clean, professional appearance. Ideal for HVAC supply and exhaust systems, kitchen and fume exhaust, laboratories, industrial plants, and exposed architectural or residential installations, AeroRound™ offers a versatile, high-performance ductwork solution for projects of any scale.

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SpiraFlow™ Spiral Duct Systems

Punny HVAC Duct & Sheet Metal Work proudly offers SpiraFlow™ Galvanized Iron Spiral Duct Systems, engineered to meet the highest Canadian HVAC industry standards, including CSA and SMACNA guidelines. Designed for both commercial and residential applications, SpiraFlow™ ducts provide superior airflow efficiency, reduced pressure drop, and excellent structural performance. The continuous spiral design ensures smooth internal surfaces, minimizes turbulence and noise, and supports energy-efficient operation. These ducts are ideal for a wide range of projects—from high-demand commercial, institutional, and industrial systems to residential homes, multi-residential buildings, and custom architectural installations.

Manufactured from hot-dip galvanized steel sheets conforming to ASTM A653 specifications with a G90 / Z275 zinc coating (275 g/m²), SpiraFlow™ ducts offer superior corrosion resistance, durability, and long-term performance. The precision spiral seam allows for airtight, leak-resistant joints and faster installation with fewer connections, reducing labor costs and air leakage. Available in diameters from 125 mm to 1600 mm and straight lengths up to 6 meters, SpiraFlow™ spiral ducts provide versatility, ease of installation, and a clean, modern appearance for both exposed and concealed applications. Ideal for HVAC supply and exhaust systems, kitchen and fume exhaust, laboratories, industrial plants, swimming pools, and architectural installations, SpiraFlow™ delivers high performance, energy efficiency, and long-lasting reliability for projects of any scale.