{"product_id":"galvanized-steel-roof-vent-cap-4-with-backdraft-damper-bird-screen-for-4","title":"Galvanized Steel Roof Vent Cap 4\" with Backdraft Damper \u0026 Bird Screen for 4\"","description":"\u003cstyle\u003e\nbody { font-family: Arial, sans-serif; color: #333; line-height: 1.6; padding: 20px; }\nh1 { color: #1e90ff; text-align: center; font-size: 28px; margin-bottom: 20px; }\nh2 { color: #00bfff; font-size: 22px; border-bottom: 2px solid #1e90ff; padding-bottom: 5px; margin-top: 25px; }\np { font-size: 16px; margin: 10px 0; }\ntable { width: 100%; border-collapse: collapse; margin: 20px 0; background-color: #fff; box-shadow: 0 4px 8px rgba(0,0,0,0,0.1); }\nth, td { padding: 12px; text-align: left; border: 1px solid #ddd; }\nth { background-color: #1e90ff; color: white; font-weight: bold; }\ntr:nth-child(even) { background-color: #f9f9f9; }\n.highlight { color: #1e90ff; font-weight: bold; }\n.section { background-color: #f0f8ff; padding: 20px; border-radius: 10px; margin: 20px 0; }\nul, ol { margin-left: 20px; }\nli { margin-bottom: 10px; }\n\u003c\/style\u003e\n\u003ch1\u003eGalvanized Steel Roof Vent Cap 4\" with Backdraft Damper \u0026amp; Bird Screen for 4\" Duct\u003c\/h1\u003e\n\u003cp\u003eThe Air Vent galvanized steel roof vent cap terminates 4-inch round ducts through the roof. Heavy-gauge construction with a built-in backdraft damper, removable 1\/4-inch mesh bird screen, and 10.5-inch square sealing flange provides durable weatherproof performance for bathroom fans, range hoods, and attic ventilation.\u003c\/p\u003e\n\u003cdiv class=\"section\"\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan class=\"highlight\"\u003eBuilt-in Backdraft Damper\u003c\/span\u003e – Gravity-assisted flapper opens for exhaust and closes to block drafts, rain, and pests.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"highlight\"\u003eRemovable Pest Guard\u003c\/span\u003e – 1\/4-inch mesh screen keeps birds, rodents, and insects out; pops out for easy cleaning.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"highlight\"\u003eOversized Sealing Flange\u003c\/span\u003e – 10.5 in x 10.5 in base allows full shingle overlap and roofing cement seal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"highlight\"\u003eHeavy-Gauge Galvanized Steel\u003c\/span\u003e – Withstands hail, snow loads, and UV exposure better than plastic or thin aluminum.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"highlight\"\u003eCorrosion-Resistant Coating\u003c\/span\u003e – Hot-dipped galvanized finish protects in coastal or high-moisture areas.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"highlight\"\u003eUniversal Roof Pitch\u003c\/span\u003e – Works on pitches from 3\/12 to 12\/12.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"highlight\"\u003e4-Inch Duct Compatibility\u003c\/span\u003e – Fits standard 4-inch round duct (inner diameter) for bathroom, kitchen, and attic exhaust.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"highlight\"\u003eSafety Note for Dryer Use\u003c\/span\u003e – Remove the bird screen when venting a clothes dryer to prevent lint buildup.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"section\"\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAir Vent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eVent and Pipe Flashing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMPN\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4-in x 10.5-in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eUnited States\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHeavy-Gauge Galvanized Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDuct Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4-inch Round Duct\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBase Flange\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10.5 in x 10.5 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eScreen\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1\/4-inch Mesh (Removable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eVent Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eOne-Way Exhaust with Damper\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"section\"\u003e\n\u003ch2\u003eInstallation Overview\u003c\/h2\u003e\n\u003cp\u003eCut a 4-1\/4-inch hole, slide the stem into the duct from the attic, seal the flange with roofing cement, nail in place, and overlap shingles on the top and sides while leaving the bottom edge exposed for drainage. Confirm the damper moves freely after installation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"section\"\u003e\n\u003ch2\u003eUse Cases\u003c\/h2\u003e\n\u003cp\u003eIdeal for terminating bathroom exhaust fans, range hoods, and attic ventilation ducts through asphalt or composition roofs. The galvanized steel construction offers long-term durability in residential roofing applications.\u003c\/p\u003e\n\u003c\/div\u003e\u003cdiv\u003e\n\u003cp\u003e\u003cstrong\u003eBrand:\u003c\/strong\u003e Air Vent\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eType:\u003c\/strong\u003e Vent and Pipe Flashing\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMPN:\u003c\/strong\u003e 4-in x 10.5-in\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e United States\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Air Vent","offers":[{"title":"Default Title","offer_id":43903897370742,"sku":"P300\/3416P+3415P\/1911\/RNW1\/RNAI","price":59.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0679\/4277\/6950\/files\/57_96051c35-e9f8-4a45-87cc-75ff5bfa0882.jpg?v=1785037127","url":"https:\/\/sellizoe.com\/products\/galvanized-steel-roof-vent-cap-4-with-backdraft-damper-bird-screen-for-4","provider":"Sellizo","version":"1.0","type":"link"}