{"product_id":"hon-guan-duct-damper-4-inch-upgraded-backdraft-damper-one-way-airflow-for-4-inch-duct-2-pack","title":"Hon\u0026Guan Duct Damper 4 Inch – Upgraded Backdraft Damper, One-Way Airflow for 4-Inch Duct (2-Pack)","description":"\u003ch2\u003eUpgrade design for lasting performance\u003c\/h2\u003e\n\u003cp\u003eThe Hon\u0026amp;Guan 4-inch duct damper is engineered with two concave inward pressure ribs and a thicker body at 0.6 mm. This enhanced structure adds solidity and helps the unit withstand routine HVAC handling while keeping a slim profile for tight installations.\u003c\/p\u003e\n\u003cp\u003eWith a rugged yet compact build, the dampers are designed to resist wear from daily airflow shifts, reducing wobble and providing a steadier seal over time. The two-pack offers ready coverage for multiple ducts or future replacements, making it a practical choice for both new setups and upgrades.\u003c\/p\u003e\n\u003ch2\u003eMaterials and quiet operation\u003c\/h2\u003e\n\u003cp\u003eThe damper leaves are galvanized steel, the axis is aluminum, and the springs are carbon steel. A rubber ring guarantees snug closure and quiet operation, so you can maintain comfortable acoustics in living spaces while controlling airflow.\u003c\/p\u003e\n\u003ch2\u003eHow it works and proper placement\u003c\/h2\u003e\n\u003cp\u003eValve wings open under the pressure of moving air; when airflow reverses, the spring action seals the pathway to help prevent reverse drafts. For best results, install with the spring oriented horizontally so the damper opens and closes smoothly and consistently.\u003c\/p\u003e\n\u003ch2\u003eApplications and real-life use cases\u003c\/h2\u003e\n\u003cp\u003eDesigned for use with flexible or non-flexible HAVC ducts, these dampers are well suited for range hoods, bathroom fans, kitchens, and other home HVAC applications. The 2-pack provides versatile coverage across different ducts in a single project.\u003c\/p\u003e\n\u003ch2\u003eWhat’s included and practical tips\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e2 x 4-inch backdraft dampers\u003c\/li\u003e\n  \u003cli\u003eHorizontal orientation recommended for optimal operation\u003c\/li\u003e\n  \u003cli\u003eRubber seal ensures reliable closure and reduced drafts\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What is the Hon\u0026amp;Guan Duct Damper 4 Inch designed for?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: A backdraft damper that blocks reverse airflow in 4-inch ducts, ideal for range hoods, bathrooms, and other home HVAC installations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What materials and features does it include?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Galvanized steel leaves, aluminum axis, carbon steel springs, 0.6 mm ribs, rubber seal for quiet closure; installs horizontally for best operation.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Hon\u0026Guan","offers":[{"title":"Default Title","offer_id":53087801671791,"sku":"B0DDQGDDXY","price":24.91,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/0598\/3087\/files\/honguan-duct-damper-4inch-front-view.jpg?v=1778661028","url":"https:\/\/taskholt.com\/products\/hon-guan-duct-damper-4-inch-upgraded-backdraft-damper-one-way-airflow-for-4-inch-duct-2-pack","provider":"TaskHolt","version":"1.0","type":"link"}