{"product_id":"air-flow-products-re065-reducer-increaser-6-to-5-inch","title":"Air Flow Products RE065 Reducer Increaser 6 to 5 Inch","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe AIR FLOW PRODUCTS RE065 is a duct reducer-increaser fitting designed to transition between 6-inch and 5-inch round ductwork sections. This type of fitting is used to step duct diameter up or down within a supply or return air system, maintaining airflow continuity where duct sizes change. Licensed sheet metal mechanics and HVAC installers work with fittings like this during new construction trunk-and-branch layouts and retrofit modifications. The RE065 is a compact, purpose-built transition piece that seats into standard round duct connections at both ends.\u003c\/p\u003e\u003cp\u003eThe RE065 is suited for residential and light commercial HVAC duct systems where a 6-inch-to-5-inch diameter transition is required. Common install scenarios include branch takeoff adjustments, equipment replacement where duct sizing does not match the new unit's collar, and system rebalancing work. This fitting allows the installer to reduce or increase duct diameter within a single piece rather than using multiple fittings, keeping transitions clean and minimizing pressure drop.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eTransitions between 6-inch and 5-inch round duct diameters in a single fitting\u003c\/li\u003e\n\u003cli\u003eSuitable for both reducing and increasing duct diameter depending on airflow direction\u003c\/li\u003e\n\u003cli\u003eDesigned for integration into standard round duct supply and return systems\u003c\/li\u003e\n\u003cli\u003eCompact form factor reduces the need for additional transition fittings\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement and new-install fitting for residential and light commercial round duct systems requiring a 6-inch to 5-inch transition.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is typically performed by licensed HVAC technicians or sheet metal mechanics. Power down the air handling unit and confirm the system is de-energized before modifying any ductwork. Secure the fitting with sheet metal screws and seal all joints with UL 181-listed duct tape or mastic sealant in accordance with local mechanical codes. Do not force the fitting onto undersized duct collars.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLarge End Diameter\u003c\/strong\u003e: 6 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSmall End Diameter\u003c\/strong\u003e: 5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitting Type\u003c\/strong\u003e: Reducer-Increaser\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: RE065\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"AIR FLOW PRODUCTS","offers":[{"title":"Default Title","offer_id":51348013023538,"sku":"RE065","price":19.57,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/310554507.jpg?v=1782118008","url":"https:\/\/voomisupply.com\/products\/air-flow-products-re065-reducer-increaser-6-to-5-inch","provider":"Voomi Supply","version":"1.0","type":"link"}