{"product_id":"hart-cooley-821-10x4-supply-register-white-10x4-inches-steel","title":"Hart Cooley 821-10x4 Supply Register White 10x4 Inches Steel","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe Hart Cooley 821-10x4 is a steel supply register designed for residential and commercial HVAC air distribution systems. Built from heavy-gauge steel with a clean white finish, this register delivers reliable performance in forced-air supply applications. HVAC technicians and contractors rely on supply registers like the 821-10x4 to direct conditioned air into living and working spaces with consistent airflow control. The white finish blends with standard wall and ceiling surfaces, making it a practical choice for finished interior installations. The register measures 10 inches by 4 inches, a common size for single-room supply drops and branch duct terminations. Steel construction provides long-term durability compared to plastic alternatives, resisting warping and damage in high-velocity airflow conditions. The fin spacing is 3\/4 inches, which controls the direction and spread of air discharge into the room. This spacing is standard for supply registers used in residential and light commercial HVAC systems. Supply registers like this one are installed at the end of supply ducts to introduce heated or cooled air into a conditioned space. They differ from return air grilles, which pull air back into the system. Proper selection of register size and fin spacing helps balance airflow throughout a duct system, improving comfort and system efficiency. The Hart Cooley 821-10x4 fits into the 821 series product line, which is part of the Air Diffusers collection. This makes it compatible with other 821 series components for consistent aesthetics across a project. HVAC installers, sheet metal contractors, and facilities maintenance teams will find this register straightforward to install in standard duct openings. It is suited for new construction and replacement applications where a durable, steel supply register in a 10x4 inch size is required.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSteel construction for long-lasting durability in supply air applications\u003c\/li\u003e\n\u003cli\u003eWhite finish blends with standard interior wall and ceiling surfaces\u003c\/li\u003e\n\u003cli\u003e3\/4 inch fin spacing for consistent and controlled air direction\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eProduct Highlights\u003c\/h4\u003e\u003cp\u003eThe Hart Cooley 821-10x4 is a 10x4 inch steel supply register with a white finish and 3\/4 inch fin spacing, built for reliable use in residential and commercial HVAC duct systems.\u003c\/p\u003e\u003ch3\u003eProduct Information\u003c\/h3\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: HART COOLEY\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 821-10x4\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCollection\u003c\/strong\u003e: Air Diffusers\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type\u003c\/strong\u003e: Supply Register\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish\u003c\/strong\u003e: White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize\u003c\/strong\u003e: 10x4 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFin Spacing\u003c\/strong\u003e: 3\/4 inches\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HART \u0026 COOLEY","offers":[{"title":"Default Title","offer_id":51120915906866,"sku":"821-10X4","price":27.4,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/304886564.jpg?v=1777743216","url":"https:\/\/voomisupply.com\/products\/hart-cooley-821-10x4-supply-register-white-10x4-inches-steel","provider":"Voomi Supply","version":"1.0","type":"link"}