{"title":"4'' DuraFlex Aluminum Chimney Liner (Gas)","description":"\u003ch2\u003eDura-Vent DuraFlexAL Aluminum Chimney Liner\u003c\/h2\u003e \u003cbr\u003e\u003cstrong\u003eDuraFlexAL\u003c\/strong\u003e is Dura-Vent's flexible aluminum liner for gas burning appliances (not for use with wood, oil, pellet or coal burning appliances).  If you have a straight down installation DuraFlexAL is a good choice, especially if price is a concern.  We recommend you study the brochure and installation instructions to become familiar with the product.  Follow manufacturer recommendations whenever applicable. Never use a chimney liner that is smaller in diameter than the flue size of the appliance it is being connected to.  See \u003ca href=\"\/4-inch-duraflex-stainless-steel-chimney-liner.html\"\u003eDuraFlexSS\u003c\/a\u003e for wood, oil, pellet or coal burning appliances.\u003cbr\u003eNot what you're looking for? See all \u003ca href=\"\/duraflex-gas-chimney-liner.html\"\u003eDuraFlex AL Gas Chimney Liner\u003c\/a\u003e","products":[{"product_id":"4-duraflexal-25-aluminum-chimney-liner-4dfa-25-6189","title":"4\" DuraFlexAL 25' Aluminum Gas Chimney Liner - 4DFA-25","description":"\u003cp\u003eFeatures:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eInner Diameter: 4\"\u003c\/li\u003e\n\u003cli\u003eFuel Types Compatible With: Natural Gas, Liquid Propane\u003c\/li\u003e\n\u003cli\u003eUL Listed: Yes\u003c\/li\u003e\n\u003cli\u003eLength:  25' \u003c\/li\u003e\n\u003cli\u003eDouble Wall Construction\u003c\/li\u003e\n\u003cli\u003eLimited Lifetime Warranty\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eDuraFlex Aluminum Flex Liner is available in 3\" to 8\" diameters and in 25', 35', and 50' lengths.\u003c\/p\u003e\u003cp\u003eAn economical venting system used for relining masonry chimney for natural gas or liquid propane category I, draft hood equipped appliances, and appliances tested and listed to use Type B Gas Vent for a wide range of applications, including: natural gas fireplaces, gas-fired furnaces, boilers, water heaters, and wall or space heating applications. Protects the masonry chimney from damaging effects of flue product condensation.\u003c\/p\u003e\u003cp\u003eSee all \u003ca href=\"\/4-inch-duraflex-aluminum-chimney-liner.html\"\u003e4\" DuraFlex AL chimney pipe\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAdditional Information:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eDuraFlex AL is an economical venting system used for relining masonry chimney for natural gas or liquid propane category I, draft hood equipped appliances, and appliances tested and listed to use Type B Gas Vent for a wide range of applications, including: natural gas fireplaces, gas fired furnaces, boilers, water heaters, and wall or space heating applications. DuraFlex AL also protects the masonry chimney from the damaging effects of flue product condensation.\u003c\/p\u003e\u003cp\u003eDuraFlex AL Relining Systems ensure safe and efficient venting of heating appliances while protecting the masonry chimney from the damaging effects of flue product condensation.  DuraFlex AL, an aluminum relining system, provides and economical means to reline masonry chimney for Category 1 gas furnaces, water heaters, fireplace inserts, and non-condensing boilers and comes with a Lifetime Limited Warranty.  DuraFlex AL flexible aluminum liner and components are UL Listed.\u003c\/p\u003e\u003cp\u003e\u003cimg src=\"\/content\/icons\/pdf.svg\" alt=\"Adobe PDF Icon\" width=\"26\" height=\"25\"\u003e  \u003ca target=\"_blank\" href=\"\/content\/pdf\/duraflexinstall-instructions.pdf\"\u003eInstallation Instructions\u003c\/a\u003e\u003c\/p\u003e \u003cp\u003e\u003cimg src=\"https:\/\/images.salsify.com\/image\/upload\/s--k0fMd_sa--\/fao5prhwofvdgmyvovp8.webp\" alt=\"California Proposition 65 Warning Symbol\"\u003e\u003cstrong\u003eWARNING:\u003c\/strong\u003e This product can expose you to chemicals including Chromium, which is known to the State Of California to cause cancer and birth defects or other reproductive harm. For more information go to \u003ca href=\"http:\/\/www.p65warnings.ca.gov\/\" target=\"_blank\"\u003ehttp:\/\/www.P65Warnings.ca.gov\u003c\/a\u003e.\u003c\/p\u003e","brand":"DuraFlex AL","offers":[{"title":"Default Title","offer_id":48045113409773,"sku":"NLE5SP_4DFA_25","price":233.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0713\/2309\/1181\/files\/omc9q323jnnoivupswxc.jpg?v=1746139750"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0713\/2309\/1181\/collections\/apipbkeba__10774.jpg?v=1767776599","url":"https:\/\/www.northlineexpress.com\/collections\/4-inch-duraflex-aluminum-chimney-liner-1.oembed","provider":"Northline Express","version":"1.0","type":"link"}