{"product_id":"air-flow-products-re2018-duct-reducer-increaser-20-to-18","title":"Air Flow Products RE2018 Duct Reducer Increaser 20 to 18","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe AIR FLOW PRODUCTS RE2018 is a duct reducer-increaser fitting designed to transition between 20-inch and 18-inch round duct diameters in forced-air HVAC systems. This type of fitting allows ductwork installers to step down or step up airflow paths where duct sizing changes along a trunk or branch run. The RE2018 maintains airflow continuity across the diameter transition, making it a practical component in both new construction and retrofit duct system work. HVAC sheet metal installers and duct fabricators are the primary trades that specify and install this fitting.\u003c\/p\u003e\n\u003cp\u003eThis reducer-increaser is suited for residential and light commercial forced-air installations where a 20-inch to 18-inch duct transition is required. Typical applications include main trunk reductions as a duct run extends further from the air handler, or branch takeoff configurations where duct sizing must be adjusted to balance system static pressure. The fitting is identified by the AFP designation RE2018 and corresponds to the 85-series product line within the AIR FLOW PRODUCTS catalog.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eTransitions between 20-inch and 18-inch round duct diameters\u003c\/li\u003e\n  \u003cli\u003eSuitable for trunk reductions and branch run adjustments in forced-air systems\u003c\/li\u003e\n  \u003cli\u003ePart of the AIR FLOW PRODUCTS 85-series duct fitting line\u003c\/li\u003e\n  \u003cli\u003eSupports both supply and return duct configurations depending on installation layout\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style duct fitting replacement or new-install component for forced-air HVAC systems requiring a round duct transition from 20 inches to 18 inches in diameter.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by licensed HVAC technicians or qualified sheet metal installers following applicable mechanical codes such as SMACNA duct construction standards and local mechanical codes. Shut down the air handling unit and confirm the system is de-energized before cutting or connecting ductwork sections. Secure the fitting with sheet metal screws and seal all joints with UL 181-listed mastic or foil tape to prevent air leakage. Verify the direction of airflow relative to the reducer orientation before final fastening.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInlet Diameter\u003c\/strong\u003e: 20 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOutlet Diameter\u003c\/strong\u003e: 18 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 85\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: RE2018\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"AIR FLOW PRODUCTS","offers":[{"title":"Default Title","offer_id":51347224101170,"sku":"RE2018","price":62.35,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/310554408.jpg?v=1782099532","url":"https:\/\/voomisupply.com\/products\/air-flow-products-re2018-duct-reducer-increaser-20-to-18","provider":"Voomi Supply","version":"1.0","type":"link"}