Type B Double Wall Adapter Round to Oval 4"

Type B Double Wall Adapter Round to Oval 4" bridges round and oval ductwork systems with precision engineering. This transition fitting accommodates 4-inch round ducts connecting to Type B double wall oval configurations, eliminating the need for custom fabrication. Built to exacting standards, it ensures minimal air leakage and maintains system efficiency across mixed duct geometries. Essential for retrofits, system expansions, or installations combining round and oval duct runs in HVAC applications.