الشفاه الألومنيوم

In modern HVAC pre-insulated duct systems, the HVAC duct flanges connection system plays a critical role in ensuring duct airtightness and installation efficiency. The two most commonly used types are PVC duct flanges and aluminum duct flanges. They differ in structural strength, durability, and application environments, making proper selection essential for overall system performance. 1. Features […]