4″ Galvanized Steel Spiral Duct, 12″ Long

Engineered for durability and precision, this 4-inch spiral duct pipe is crafted from high-grade galvanized steel to withstand the rigors of daily use in residential and commercial HVAC systems. The corrosion-resistant construction ensures long-term reliability, effectively handling extreme environmental conditions with a heat resistance capacity of up to 248°F (120°C). This makes it an ideal solution for installations in attics, basements, or tight wall cavities where temperature fluctuations and potential moisture exposure are common. By leveraging robust material properties, this ducting solution provides a dependable foundation for air exhaust and intake applications, supporting both central air conditioning lines and dryer ventilation systems.

Designed with airflow efficiency as a primary objective, the duct features tight spiral sealing that achieves Class D hermetic standards, minimizing air leakage and maximizing ventilation performance. The precise female fit, with an internal diameter of 3.97 inches, allows for a seamless connection to male end connectors, ensuring a secure and leak-tight junction that maintains system integrity. This optimized design facilitates smooth air movement, which is critical for maintaining the efficiency of exhaust fans, kitchen range hoods, and bathroom ventilation units. The round profile and smooth internal surface reduce turbulence, contributing to quieter operation and improved overall system performance.

Installation is straightforward and accessible for both professional HVAC technicians and DIY enthusiasts. The smooth round ends are designed for quick fitment to either flexible or rigid ducting components, requiring only standard foil tape or sealant to secure the connection. No special tools are necessary, making this duct an excellent choice for system upgrades, maintenance replacements, or new construction projects. Whether you are enhancing airflow in a laundry room, improving comfort in a residential space, or managing industrial exhaust needs, this heavy-duty duct offers a practical, cost-effective, and durable solution for a wide variety of ventilation requirements.