Type B Double Wall Adapter Oval to Round 4"

Type B Double Wall Adapter Oval to Round 4" This adapter transitions oval ductwork to 4" round piping with double-wall construction for enhanced durability and thermal performance. The Type B design ensures secure, code-compliant connections in HVAC and ventilation systems. Ideal for retrofits and new installations where duct shape conversion is required. Engineered for reliable airflow management and long-term reliability in commercial and residential applications.