{"product_id":"lukjan-rx3107-manual-duct-damper-7-inch-round-steel","title":"Lukjan rx3107 Manual Duct Damper 7 Inch Round Steel","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe LUKJAN rx3107 is a 7-inch round manual duct damper designed for precise airflow regulation in residential and light commercial HVAC duct systems. Built from galvanized steel, it provides durable, corrosion-resistant performance suited to both new construction and retrofit installations. The damper allows HVAC technicians to manually balance system airflow, fine-tuning distribution across zones to maintain consistent temperature control. Its compact profile at 1 inch in height keeps installation straightforward in tight duct runs. This is a field-installed component handled by licensed HVAC contractors and sheet metal mechanics working with round ductwork systems.\u003c\/p\u003e\n\u003cp\u003eThe rx3107 is intended for use with 7-inch round ductwork in forced-air systems where manual zone balancing or airflow restriction is required. Typical applications include residential trunk-and-branch duct systems, light commercial single-zone builds, and retrofit projects where a technician needs to throttle supply runs to correct system imbalance. The damper seats directly into round duct for a clean, low-profile installation that does not require additional fittings in most standard configurations.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e7-inch round manual damper for direct inline duct installation\u003c\/li\u003e\n  \u003cli\u003eGalvanized steel construction for corrosion resistance and long service life\u003c\/li\u003e\n  \u003cli\u003eCompact 1-inch height fits tight duct chases and plenums\u003c\/li\u003e\n  \u003cli\u003eManual operation allows field adjustment of airflow without actuators or controls\u003c\/li\u003e\n  \u003cli\u003eSuitable for new construction and retrofit duct balancing applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement and new-installation damper for 7-inch round duct systems in residential and light commercial forced-air HVAC applications.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should be performed by a licensed HVAC technician or qualified sheet metal mechanic. Shut down the air handler and disable system power before cutting into ductwork or positioning the damper. Secure the damper to the duct using the appropriate sheet metal screws and seal connections with UL-listed foil tape or mastic per local mechanical code requirements. Do not fully close the damper on any supply run without verifying that total system static pressure remains within equipment design limits.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDiameter\u003c\/strong\u003e: 6 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDuct Size\u003c\/strong\u003e: 7 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeight\u003c\/strong\u003e: 1 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWidth\u003c\/strong\u003e: 7 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Galvanized Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOperation Type\u003c\/strong\u003e: Manual\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eItem Type\u003c\/strong\u003e: Damper\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.3 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer\u003c\/strong\u003e: Lukjan Metal Products\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: LUKJAN\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: rx3107\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"LUKJAN","offers":[{"title":"Default Title","offer_id":51620118790450,"sku":"RX3107","price":15.66,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/83b08813308a42f5c8fa5e671d88fc14.jpg?v=1787340684","url":"https:\/\/voomisupply.com\/products\/lukjan-rx3107-manual-duct-damper-7-inch-round-steel","provider":"Voomi Supply","version":"1.0","type":"link"}