{"product_id":"air-flow-products-840-1-atd200-000004-stick-on-takeoff-damper","title":"Air Flow Products 840-1-ATD200-000004 Stick-on Takeoff Damper","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe AIR FLOW PRODUCTS 840-1-ATD200-000004 is an airtight stick-on takeoff fitting with an integrated damper, designed for use with flat duct systems. The fitting measures 4 inches in diameter with a 2-inch standoff, allowing it to mount flush to flat duct and extend into the branch run with minimal obstruction. The built-in damper provides manual airflow control at the takeoff point without requiring a separate balancing component. This type of fitting is installed by licensed HVAC technicians during new duct construction or duct modification work in residential and light commercial applications.\u003c\/p\u003e\n\u003cp\u003eThis takeoff is suited for flat duct installations where airtight performance and branch airflow regulation are required at a single fitting. The stick-on design simplifies installation by adhering directly to the flat duct surface, eliminating the need for sheet metal cutting tools in some configurations. It is commonly used in trunk-and-branch supply duct systems where balanced airflow distribution across multiple zones or rooms is the installation goal.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eAirtight construction minimizes air leakage at the branch takeoff connection\u003c\/li\u003e\n  \u003cli\u003eIntegrated damper allows airflow balancing without a separate fitting\u003c\/li\u003e\n  \u003cli\u003eStick-on mounting method attaches directly to flat duct surface\u003c\/li\u003e\n  \u003cli\u003e4-inch collar size fits standard branch duct connections\u003c\/li\u003e\n  \u003cli\u003e2-inch standoff provides clearance for branch duct connection at the takeoff\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement or new-installation fitting for flat duct supply systems requiring an airtight stick-on takeoff with integrated damper.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by licensed HVAC technicians. Shut down the air handling unit and confirm the system is de-energized before cutting into or modifying any duct section. Ensure the flat duct surface is clean and free of debris before adhering the fitting to achieve a proper airtight seal. Duct installation should conform to ACCA Manual D and applicable local mechanical codes.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCollar Size\u003c\/strong\u003e: 4 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStandoff Height\u003c\/strong\u003e: 2 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDuct Type\u003c\/strong\u003e: Flat Duct\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDamper\u003c\/strong\u003e: Integrated\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMounting Type\u003c\/strong\u003e: Stick-On\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: AIR FLOW PRODUCTS\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 840-1-ATD200-000004\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"AIR FLOW PRODUCTS","offers":[{"title":"Default Title","offer_id":51347415204146,"sku":"840-1-ATD200-000004","price":28.93,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/310553241.jpg?v=1782104233","url":"https:\/\/voomisupply.com\/products\/air-flow-products-840-1-atd200-000004-stick-on-takeoff-damper","provider":"Voomi Supply","version":"1.0","type":"link"}