{"product_id":"mm-manufacturing-641r6-8x4x4-insulated-register-box","title":"Mm Manufacturing 641R6-8X4X4 Insulated Register Box","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe MM Manufacturing 641R6-8X4X4 is an insulated register box with flange designed for use in residential and light commercial HVAC duct systems. This box connects supply ductwork to a floor, wall, or ceiling register and provides an insulated transition point that helps reduce heat loss and condensation at the register opening. The R-6 insulation value makes it suitable for installations where energy code compliance or comfort performance is a priority. At 1.8 pounds, it is lightweight enough for single-technician handling during installation in tight plenum or joist-bay spaces.\u003c\/p\u003e\n\u003cp\u003eThis register box is used in forced-air heating and cooling systems where a rigid or flexible supply duct terminates at a register grille. The 8 x 4 x 4 inch configuration fits a standard 8-inch-by-4-inch register opening and is appropriate for residential new construction, retrofit duct work, and light commercial HVAC applications. HVAC installers and sheet metal contractors typically use this box when running supply branches from a trunk line or air handler to individual room registers.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eR-6 insulation value reduces heat loss and limits condensation at the register boot\u003c\/li\u003e\n  \u003cli\u003eIntegrated flange provides a positive register grille mounting surface for a clean, secure fit\u003c\/li\u003e\n  \u003cli\u003e8 x 4 x 4 inch throat size fits standard register openings of that dimension\u003c\/li\u003e\n  \u003cli\u003eLightweight at 1.8 pounds, easing single-person installation in confined spaces\u003c\/li\u003e\n  \u003cli\u003eCompact package dimensions of 10 x 6 x 6.75 inches for efficient jobsite storage and transport\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement or new-installation register box for residential and light commercial forced-air HVAC duct systems requiring an 8 x 4 x 4 inch insulated boot with flange.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\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 all duct connections with mechanical fasteners and seal with UL 181-rated mastic or foil tape per local mechanical code requirements. Do not compress or puncture the insulation layer during handling, as damage reduces effective R-value.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThroat Size\u003c\/strong\u003e: 8 x 4 x 4 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsulation Rating\u003c\/strong\u003e: R-6\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Length\u003c\/strong\u003e: 10 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Width\u003c\/strong\u003e: 6 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Height\u003c\/strong\u003e: 6.75 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 1.8 pounds\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: 641R6-8X4X4\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"M\u0026M MANUFACTURING","offers":[{"title":"Default Title","offer_id":51267947561266,"sku":"641R6-8X4X4","price":33.39,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/308913370.webp?v=1780695240","url":"https:\/\/voomisupply.com\/products\/mm-manufacturing-641r6-8x4x4-insulated-register-box","provider":"Voomi Supply","version":"1.0","type":"link"}