{"product_id":"ac-infinity-4-inch-backdraft-damper-one-way-duct-insert-with-spring-loaded-blades","title":"AC Infinity 4-Inch Backdraft Damper | One-Way Duct Insert with Spring-Loaded Blades","description":"\u003cp\u003eUpgrade your ducting with the AC Infinity 4-in Backdraft Damper, a purpose-built insert designed for 4-in range hoods, bathroom fans, and other common HVAC applications. With thoughtful engineering and durable materials, this damper blends everyday practicality with reliable airflow control.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey features at a glance\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAir-sealing gasket: Outer rubber gaskets create an airtight seal and firm grip between damper and duct, helping minimize unwanted drafts.\u003c\/li\u003e\n\u003cli\u003eVersatile mounting: Install horizontally or vertically to prevent backflow and keep debris from entering the ducting path.\u003c\/li\u003e\n\u003cli\u003eRobust internals: Galvanized steel body houses spring-loaded aluminum damper blades that respond quickly, opening with minimal airflow and closing softly when airflow drops.\u003c\/li\u003e\n\u003cli\u003e4-in compatibility: Designed for standard 4-in duct openings; compact 5.03-inch length with a durable powder-coated finish for lasting use.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eReal-world use cases\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eKitchens: In a range hood, the damper helps prevent indoor air from sneaking back into the kitchen when the fan cycles off.\u003c\/li\u003e\n\u003cli\u003eBathrooms: In ceiling or wall exhausts, it reduces cross-drafts while maintaining venting when the fan runs.\u003c\/li\u003e\n\u003cli\u003eUtility spaces: In damp basements or laundry rooms, it helps keep dust and debris from entering the ductwork during idle periods.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWhy it matters\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe combination of galvanized steel and a powder-coated finish delivers corrosion resistance and a durable finish, while the spring-loaded blades offer a smooth response to changing airflow. The result is a compact, reliable option for 4-in ducting that supports overall system efficiency.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eInstallation tips\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMount options: Choose horizontal or vertical orientation to suit your existing duct layout.\u003c\/li\u003e\n\u003cli\u003eSimplified retrofit: The insert is designed to fit standard 4-in ducts with a straightforward slip-on or screw-in setup.\u003c\/li\u003e\n\u003cli\u003eMaintenance: Periodically inspect seals and blades to ensure consistent performance over time.\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 AC Infinity 4in Backdraft Damper designed to do?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Blocks reverse airflow in 4-in ducts for range hoods and bathroom fans, reducing drafts.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can this damper be mounted in different orientations?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes, it supports horizontal or vertical mounting to fit various duct layouts.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"AC Infinity","offers":[{"title":"Default Title","offer_id":47463324975278,"sku":"B0842XSTV9","price":57.13,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0735\/6012\/9710\/files\/ac-infinity-4in-backdraft-damper-duct-insert.jpg?v=1770279106","url":"https:\/\/handyskook.ca\/products\/ac-infinity-4-inch-backdraft-damper-one-way-duct-insert-with-spring-loaded-blades","provider":"HandySkook","version":"1.0","type":"link"}