{"product_id":"mm-manufacturing-203rf-8x4x5-90-angle-register-boot-with-flange","title":"Mm Manufacturing 203RF-8X4X5 90 Angle Register Boot with Flange","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe MM Manufacturing 203RF-8X4X5 is a 90-degree angle register boot with flange, designed for residential and light commercial HVAC duct systems. This fitting transitions supply air from a horizontal or vertical duct run to a floor, wall, or ceiling register opening. It connects to round duct and terminates at a rectangular register face with an integrated flange that seats flush against the finished surface. The 203RF-8X4X5 accommodates an 8-inch by 4-inch register opening and connects to a 5-inch round duct. Weighing 1 pound, it is a lightweight, field-installable component suited for new construction and retrofit applications.\u003c\/p\u003e\n\u003cp\u003eThis register boot is used in forced-air heating and cooling systems where a 90-degree transition is required between round trunk or branch duct and a rectangular floor, wall, or ceiling register. It is part of the 203RF series, which covers 8 common sizes for connecting to 5-inch, 6-inch, 7-inch, 8-inch, and 9-inch round duct. Typical installation scenarios include residential new construction, mobile home duct systems, and light commercial HVAC retrofits where sheet metal fittings are specified.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e90-degree angle configuration transitions round duct to rectangular register opening in a single fitting\u003c\/li\u003e\n  \u003cli\u003eIntegrated flange seats flush against finished floor, wall, or ceiling surface for a clean register fit\u003c\/li\u003e\n  \u003cli\u003e8-inch by 4-inch register face opening accepts standard residential register grilles\u003c\/li\u003e\n  \u003cli\u003eConnects to 5-inch round duct branch line\u003c\/li\u003e\n  \u003cli\u003eLightweight at 1 pound for easy single-hand positioning during install\u003c\/li\u003e\n  \u003cli\u003ePart of the 203RF series spanning five round duct sizes for consistent fitting selection across a job\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eThe 203RF series is available in 8 common sizes for use with 5-inch, 6-inch, 7-inch, 8-inch, and 9-inch round duct connections. This specific fitting is designed as an OEM-style sheet metal register boot for residential and light commercial forced-air duct systems.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eRegister boots are typically installed by HVAC sheet metal technicians or mechanical contractors. Power down the air handling unit and close the system dampers before cutting into existing duct. Secure the boot to the branch duct using sheet metal screws and seal all joints with UL 181-rated mastic or foil tape per local mechanical code requirements. Do not overtighten sheet metal screws into the collar seam, as this can distort the round inlet and create air leakage.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRegister Opening\u003c\/strong\u003e: 8 inches x 4 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRound Duct Connection\u003c\/strong\u003e: 5 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength\u003c\/strong\u003e: 9 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWidth\u003c\/strong\u003e: 10 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeight\u003c\/strong\u003e: 8.5 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 1 pound\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConfiguration\u003c\/strong\u003e: 90-degree angle with flange\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: MM Manufacturing\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 203RF-8X4X5\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"M\u0026M MANUFACTURING","offers":[{"title":"Default Title","offer_id":51268120281394,"sku":"203RF-8X4X5","price":28.29,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/308913454.webp?v=1780699476","url":"https:\/\/voomisupply.com\/products\/mm-manufacturing-203rf-8x4x5-90-angle-register-boot-with-flange","provider":"Voomi Supply","version":"1.0","type":"link"}