{"product_id":"air-flow-products-77161616-transition-boot-16x16-16-inch","title":"Air Flow Products 77161616 Transition Boot 16x16 16 Inch","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe AIR FLOW PRODUCTS 77161616 is a straight transition boot with flange, designed to connect square or rectangular duct openings to round collar duct runs. The boot features a 16x16 inch square inlet and a 16 inch round collar outlet, making it a core fitting for transitioning between flat duct sections and round trunk or branch lines. This type of fitting is standard in low-pressure residential and light commercial HVAC supply and return systems. Sheet metal workers and HVAC installers use this fitting when converting duct geometry at air handlers, plenums, and distribution points.\u003c\/p\u003e\n\u003cp\u003eThe 77161616 is suited for residential and light commercial forced-air systems where square or rectangular duct must transition to a round collar for flexible or rigid round ductwork connections. The 77F series flange design allows the boot to seat flat against a plenum wall, ceiling, or sub-floor deck, providing a secure, airtight mounting surface. This fitting is commonly installed at air handler outlets, supply plenum taps, and return air boxes where a round collar collar connection is required.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eSquare to round geometry: 16x16 inch inlet transitions to a 16 inch round collar\u003c\/li\u003e\n  \u003cli\u003eIntegrated flange for flat mounting against plenum walls, decks, or framing\u003c\/li\u003e\n  \u003cli\u003eStraight boot profile maintains consistent airflow direction through the transition\u003c\/li\u003e\n  \u003cli\u003e77F series design for standard low-pressure forced-air duct systems\u003c\/li\u003e\n  \u003cli\u003eCompatible with both flexible and rigid round duct connections at the collar\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement and standard fitting for residential and light commercial forced-air HVAC duct systems requiring a square to round transition at supply or return air plenums.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eThis fitting is typically installed by licensed sheet metal workers or HVAC technicians. Power down the air handling unit and verify the system is de-energized before beginning any ductwork modification. The flange should be secured to the plenum or framing surface using appropriate sheet metal screws, and all seams and the collar connection should be sealed with UL 181-rated mastic or foil tape in accordance with local mechanical codes and SMACNA guidelines. Do not overtighten fasteners at the collar connection when attaching flexible duct.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInlet Size\u003c\/strong\u003e: 16x16 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCollar Diameter\u003c\/strong\u003e: 16 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBoot Style\u003c\/strong\u003e: Straight\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTransition Type\u003c\/strong\u003e: Square to Round\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlange\u003c\/strong\u003e: Yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 77F\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\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: 77161616\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"AIR FLOW PRODUCTS","offers":[{"title":"Default Title","offer_id":51346416140594,"sku":"77161616","price":95.98,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/310552908.jpg?v=1782079579","url":"https:\/\/voomisupply.com\/products\/air-flow-products-77161616-transition-boot-16x16-16-inch","provider":"Voomi Supply","version":"1.0","type":"link"}