{"product_id":"duravent-25-duraflex-al-aluminum-flex-length-type-b-gas-vent-pipe","title":"DuraVent 25' DuraFlex AL - Aluminum Flex Length Type B Gas Vent Pipe","description":"\u003cdiv class=\"product__title\"\u003e\n\u003ch3 style=\"text-align: center;\"\u003eDuraVent DuraFlex AL 3\" x 25\" Aluminum Length\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eDuraVent DuraFlex AL 3\" x 25\" Aluminum Length\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e is an economical \u003c\/span\u003eflexible chimney liner component designed for masonry chimney relining with Category I natural gas and liquid propane appliances. This Type B Gas Vent compatible aluminum liner is ideal for natural gas fireplaces, gas furnaces, boilers, water heaters, and wall or space heating applications. It provides a dependable venting pathway while helping protect masonry chimneys from the damaging effects of flue gas condensation.\u003c\/p\u003e\n\u003cp\u003eBuilt by DuraVent, a trusted leader in chimney liner and venting solutions, the DuraFlex Aluminum flexible liner system delivers lightweight construction, easy installation, and reliable performance for residential and commercial applications. The 25-foot aluminum flex length offers installation flexibility for gas appliance vent replacement, chimney restoration, and Type B Gas Vent relining projects\u003cspan\u003e, providing a cost-effective and durable venting solution.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch3\u003eFeatures\u003cbr\u003e\n\u003c\/h3\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli data-section-id=\"bdc2va\" data-start=\"0\" data-end=\"220\"\u003e\n\u003cstrong data-start=\"2\" data-end=\"50\" data-is-only-node=\"\"\u003eDuraFlex AL Flexible Aluminum Chimney Liner:\u003c\/strong\u003e The DuraVent DuraFlex AL 3\" x 25\" Aluminum Length is an economical flexible chimney liner designed for Category I gas-burning appliance venting applications.\u003cspan aria-hidden=\"true\" class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1e9nilp\" data-start=\"221\" data-end=\"436\"\u003e\n\u003cstrong data-start=\"223\" data-end=\"266\" data-is-only-node=\"\"\u003eDesigned for Draft Hood Gas Appliances:\u003c\/strong\u003e Specifically engineered for use with Category I gas appliances with draft hoods, including gas fireplaces, furnaces, boilers, water heaters, and heating systems.\u003c\/li\u003e\n\u003cli data-section-id=\"pi2o18\" data-start=\"437\" data-end=\"615\"\u003e\n\u003cstrong data-start=\"439\" data-end=\"473\" data-is-only-node=\"\"\u003eUL 1777 Listed Aluminum Liner:\u003c\/strong\u003e Manufactured to meet UL 1777 chimney liner standards, providing a tested and reliable solution for masonry chimney relining projects.\u003c\/li\u003e\n\u003cli data-section-id=\"16vi9o9\" data-start=\"616\" data-end=\"808\"\u003e\n\u003cstrong data-start=\"618\" data-end=\"657\" data-is-only-node=\"\"\u003eAvailable in Multiple Flex Lengths:\u003c\/strong\u003e Offered in 25-foot, 35-foot, and 50-foot flexible liner lengths to support various chimney restoration and gas vent installation requirements.\u003c\/li\u003e\n\u003cli data-section-id=\"au9hx6\" data-start=\"809\" data-end=\"994\"\u003e\n\u003cstrong data-start=\"811\" data-end=\"849\" data-is-only-node=\"\"\u003eLightweight Aluminum Construction:\u003c\/strong\u003e Features durable aluminum flex liner construction for easier handling, installation flexibility, and dependable Type B Gas Vent performance.\u003c\/li\u003e\n\u003cli data-section-id=\"1n2p0bf\" data-start=\"995\" data-end=\"1139\"\u003e\n\u003cstrong data-start=\"997\" data-end=\"1027\" data-is-only-node=\"\"\u003eProtects Masonry Chimneys:\u003c\/strong\u003e Helps reduce damage caused by\u003cstrong\u003e \u003c\/strong\u003eflue gas condensation, extending the service life of masonry chimney systems.\u003c\/li\u003e\n\u003cli data-section-id=\"8v9pyb\" data-start=\"1140\" data-end=\"1333\" data-is-last-node=\"\"\u003e\n\u003cstrong data-start=\"1142\" data-end=\"1185\" data-is-only-node=\"\"\u003eProfessional DuraVent Venting Solution:\u003c\/strong\u003e Backed by DuraVent’s expertise in chimney liners, flexible vent systems, and HVAC venting products for residential and commercial applications.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable style=\"width: 520px;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 128px;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"width: 178.198px;\"\u003eSize\u003c\/td\u003e\n\u003ctd style=\"width: 193.802px;\"\u003eFlex Length\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 128px;\"\u003e3DFA-25\u003c\/td\u003e\n\u003ctd style=\"width: 178.198px;\"\u003e3\" I.D\u003c\/td\u003e\n\u003ctd style=\"width: 193.802px;\"\u003e25 ft.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 128px;\"\u003e4DFA-25\u003c\/td\u003e\n\u003ctd style=\"width: 178.198px;\"\u003e4\" I.D\u003c\/td\u003e\n\u003ctd style=\"width: 193.802px;\"\u003e25 ft.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 128px;\"\u003e5DFA-25\u003c\/td\u003e\n\u003ctd style=\"width: 178.198px;\"\u003e5\" I.D\u003c\/td\u003e\n\u003ctd style=\"width: 193.802px;\"\u003e25 ft.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 128px;\"\u003e55DFA-25\u003c\/td\u003e\n\u003ctd style=\"width: 178.198px;\"\u003e5.5\" I.D\u003c\/td\u003e\n\u003ctd style=\"width: 193.802px;\"\u003e25 ft.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 128px;\"\u003e6DFA-25\u003c\/td\u003e\n\u003ctd style=\"width: 178.198px;\"\u003e6\" I.D\u003c\/td\u003e\n\u003ctd style=\"width: 193.802px;\"\u003e25 ft.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 128px;\"\u003e7DFA-25\u003c\/td\u003e\n\u003ctd style=\"width: 178.198px;\"\u003e7\" I.D\u003c\/td\u003e\n\u003ctd style=\"width: 193.802px;\"\u003e25 ft.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 128px;\"\u003e8DFA-25\u003c\/td\u003e\n\u003ctd style=\"width: 178.198px;\"\u003e8\" I.D\u003c\/td\u003e\n\u003ctd style=\"width: 193.802px;\"\u003e25 ft.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 128px;\"\u003eVent Type\u003c\/td\u003e\n\u003ctd colspan=\"2\" style=\"width: 372px;\"\u003e\u003cspan\u003eType B Gas Vent\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 128px;\"\u003e\u003cspan\u003eMaterials \u0026amp; Const.\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 372px;\" colspan=\"2\"\u003e\u003cspan\u003e010” aluminum (2-ply of .005”)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 128px;\"\u003eClearance\u003c\/td\u003e\n\u003ctd colspan=\"2\" style=\"width: 372px;\"\u003e\u003cspan\u003e0” clearance to masonry\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 128px;\"\u003eListings\u003c\/td\u003e\n\u003ctd colspan=\"2\" style=\"width: 372px;\"\u003e\u003cspan\u003eListed to UL 1777 and ULC S635\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 128px;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd colspan=\"2\" style=\"width: 372px;\"\u003eLimited Lifetime Warranty\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eDownloads\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0100\/7917\/4734\/files\/DuraFlex_AL_Catalog.pdf?v=1667002866\" target=\"_blank\"\u003e\u003cstrong\u003eProduct Catalog\u003c\/strong\u003e\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0100\/7917\/4734\/files\/DFAL_Warranty.pdf?v=1667002768\" target=\"_blank\"\u003e\u003cstrong\u003eProduct Warranty\u003c\/strong\u003e\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0100\/7917\/4734\/files\/DFAL_Installation_Instruction.pdf?v=1667002803\" target=\"_blank\"\u003e\u003cstrong\u003eInstallation Manual\u003c\/strong\u003e\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0100\/7917\/4734\/files\/Typical_Installations_DFAL.pdf?v=1667002846\" target=\"_blank\"\u003e\u003cstrong\u003eTypical Installations\u003c\/strong\u003e\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"DuraVent","offers":[{"title":"3\"","offer_id":53631895503139,"sku":"3DFA-25","price":227.0,"currency_code":"USD","in_stock":false},{"title":"4\"","offer_id":55342626177315,"sku":"4DFA-25","price":287.0,"currency_code":"USD","in_stock":false},{"title":"5\"","offer_id":55342626210083,"sku":"5DFA-25","price":359.0,"currency_code":"USD","in_stock":false},{"title":"5.5\"","offer_id":55342626242851,"sku":"55DFA-25","price":387.0,"currency_code":"USD","in_stock":false},{"title":"6\"","offer_id":55342626275619,"sku":"6DFA-25","price":419.0,"currency_code":"USD","in_stock":false},{"title":"7\"","offer_id":55342626308387,"sku":"7DFA-25","price":496.0,"currency_code":"USD","in_stock":false},{"title":"8\"","offer_id":55342626341155,"sku":"8DFA-25","price":945.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0780\/6926\/8771\/files\/DuraVent-25_-DuraFlex-AL-Aluminum-Flex-Length-Type-B-Gas-Vent-Pipe-DuraVent-Dreamwood-Living-26029892.jpg?v=1780434739","url":"https:\/\/www.dreamwoodliving.com\/products\/duravent-25-duraflex-al-aluminum-flex-length-type-b-gas-vent-pipe","provider":"Dreamwood Living","version":"1.0","type":"link"}