{"product_id":"air-flow-products-77f111616-transition-boot-11x16-16-in-collar","title":"Air Flow Products 77F111616 Transition Boot 11x16 16 in Collar","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe AIR FLOW PRODUCTS 77F111616 is a straight transition boot with flange designed to connect square or rectangular ductwork to round collar outlets in forced-air HVAC systems. The boot transitions an 11 by 16 inch rectangular opening to a 16-inch round collar, making it a critical fitting where trunk lines or plenums meet branch runouts. HVAC installers and sheet metal contractors use this fitting during new construction and retrofit duct work to maintain airflow geometry and minimize turbulence at the transition point. The integrated flange supports secure attachment to register boxes or ceiling and floor deck surfaces.\u003c\/p\u003e\u003cp\u003eThis fitting is suited for residential and light commercial forced-air installations where a square-to-round transition is required at the end of a rectangular duct run. It is commonly installed at floor, ceiling, or sidewall positions as a termination fitting before a grille or register. The 77F series designation identifies the straight-body, flanged style within the AIR FLOW PRODUCTS line, making it a standard selection for duct layout work on new builds and replacement jobs alike.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eStraight-body design maintains consistent airflow path through the transition\u003c\/li\u003e\n\u003cli\u003eIntegrated flange allows flush mounting to decking or register openings\u003c\/li\u003e\n\u003cli\u003eSquare-to-round geometry bridges rectangular trunk or branch duct to round collar outlet\u003c\/li\u003e\n\u003cli\u003e11 by 16 inch rectangular inlet with 16-inch round collar outlet\u003c\/li\u003e\n\u003cli\u003e77F series construction suited for standard residential and light commercial duct systems\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style sheet metal transition fitting for standard forced-air residential and light commercial duct systems requiring a square-to-round boot with flange at the supply or return termination point.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is typically performed by a licensed HVAC technician or sheet metal contractor. Power down the air handler or furnace at the disconnect before beginning any duct work. Secure the flange to the decking surface using appropriate fasteners and seal all seams with listed duct sealant or metal-backed tape per local mechanical code requirements. Do not compress or restrict the collar opening during installation, as this will reduce airflow and system performance.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRectangular Inlet Size\u003c\/strong\u003e: 11 x 16 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRound Collar Diameter\u003c\/strong\u003e: 16 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody Style\u003c\/strong\u003e: Straight Transition with Flange\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTransition Type\u003c\/strong\u003e: Square to Round\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 77F\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: AIR FLOW PRODUCTS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 77F111616\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"AIR FLOW PRODUCTS","offers":[{"title":"Default Title","offer_id":51347633537330,"sku":"77F111616","price":79.31,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/310552862.jpg?v=1782110006","url":"https:\/\/voomisupply.com\/products\/air-flow-products-77f111616-transition-boot-11x16-16-in-collar","provider":"Voomi Supply","version":"1.0","type":"link"}