{"product_id":"duravent-duraplus-7-x-36-square-ceiling-support-box","title":"DuraVent DuraPlus 7\" x 36\" Square Ceiling Support Box","description":"\u003ch2 style=\"text-align: center;\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0100\/7917\/4734\/files\/Duravent_Logo_160x160.jpg?v=1615795217\" alt=\"\" style=\"float: none;\"\u003e\u003cbr\u003e\n\u003c\/h2\u003e\n\u003ch3\u003e\u003cstrong\u003eOverview\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eDuraPlus is designed to stay cool on the outside, to provide a hot draft on the inside, to boost stove efficiency, and provide a fire-safe design that protects both the chimney and the building. This triple-wall chimney features two insulating layers (refractory blanket, plus air space). The refractory insulation is held securely in position, eliminating hot spots common with loose-fill type insulations. In the event of a creosote fire, the compressible blanket insulation permits the chimney liner to expand outwardly in a radial direction\u003c\/p\u003e\n\u003cp\u003eDesigned for normal, continuous operation at 1000° F flue gas temperatures, DuraPlus is subjected to rigorous and stringent HT requirements of the UL standard, including one hour at 1400° F, plus three ten-minute chimney fire tests at 2100° F.\u003c\/p\u003e\n\u003ch3\u003e\n\u003cstrong\u003e\u003c\/strong\u003e\u003cbr\u003e\n\u003c\/h3\u003e\n\u003ch3\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eUse with flat, vaulted, or cathedral ceilings.\u003c\/li\u003e\n\u003cli\u003eThe Square Ceiling Support Box is painted black.\u003c\/li\u003e\n\u003cli\u003eStarter Section built-in.\u003c\/li\u003e\n\u003cli\u003eSupports up to 35’ of DuraPlus Chimney.\u003c\/li\u003e\n\u003cli\u003eFor adapters, see DVL and DuraBlack section.\u003c\/li\u003e\n\u003cli\u003eTrim included.\u003c\/li\u003e\n\u003cli\u003eRefer to the Ceiling Pitch table to determine the size of the support box needed.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eMaterials and Construction\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e.016” 430 stainless steel outer wall\u003c\/li\u003e\n\u003cli\u003e.016” 430 stainless steel inner liner.\u003c\/li\u003e\n\u003cli\u003e.018” galvanized steel outer wall.\u003c\/li\u003e\n\u003cli\u003e.018” aluminized steel intermediate liner.\u003c\/li\u003e\n\u003cli\u003eInsulated layers plus ventilated air space.\u003c\/li\u003e\n\u003cli\u003eLocks tightly with a precision twist-lock connection.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003cbr\u003e\u003c\/p\u003e\n\u003ch3\u003e\n\u003cstrong\u003e\u003c\/strong\u003e\u003cbr\u003e\n\u003c\/h3\u003e\n\u003ch3\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ctable style=\"width: 534px;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 131.1px;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"width: 386.9px;\"\u003e7DP-CS11\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 131.1px;\"\u003eDiameter\u003c\/td\u003e\n\u003ctd style=\"width: 386.9px;\"\u003e7\" (inner)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 131.1px;\"\u003eDimension\u003c\/td\u003e\n\u003ctd style=\"width: 386.9px;\"\u003e11\" (A) x 18.25\" (W)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 131.1px;\"\u003eClearances\u003c\/td\u003e\n\u003ctd style=\"width: 386.9px;\"\u003e2\" clearance to combustible.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 131.1px;\"\u003eListings\u003c\/td\u003e\n\u003ctd style=\"width: 386.9px;\"\u003e\u003cspan\u003eUL Listed to UL 103HT (MH7399).\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 131.1px;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"width: 386.9px;\"\u003eLimited-lifetime warranty\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 524px;\"\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cstrong\u003eCeiling Pitch Table\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: left;\"\u003eDuraBlack\u003c\/td\u003e\n\u003ctd style=\"text-align: left;\"\u003eDVL\u003c\/td\u003e\n\u003ctd style=\"text-align: left;\"\u003eUSE\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: left;\"\u003e0\/12-4\/12\u003c\/td\u003e\n\u003ctd style=\"text-align: left;\"\u003e0\/12-6\/12\u003c\/td\u003e\n\u003ctd style=\"text-align: left;\"\u003e11\" Support Box\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: left;\"\u003e5\/12-9\/12\u003c\/td\u003e\n\u003ctd style=\"text-align: left;\"\u003e7\/12-13\/12\u003c\/td\u003e\n\u003ctd style=\"text-align: left;\"\u003e24\" Support Box\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: left;\"\u003e10\/12-14\/12\u003c\/td\u003e\n\u003ctd style=\"text-align: left;\"\u003e14\/12-20\/12\u003c\/td\u003e\n\u003ctd style=\"text-align: left;\"\u003e36\" Support Box\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0100\/7917\/4734\/files\/SCSB_drawing_480x480.jpg?v=1648552507\" style=\"float: none;\"\u003e\u003c\/div\u003e\n\u003cp\u003e \u003cbr\u003e\u003c\/p\u003e\n\u003ch3\u003e\n\u003cstrong\u003e\u003c\/strong\u003e\u003cbr\u003e\n\u003c\/h3\u003e\n\u003ch3\u003e\u003cstrong\u003eDownloads\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0100\/7917\/4734\/files\/DuraPlus_Brochure.pdf?v=1648525242\" target=\"_blank\"\u003e\u003cstrong\u003eDownload Product Brochure\u003c\/strong\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0100\/7917\/4734\/files\/DuraPlus_Catalog.pdf?v=1648525281\" target=\"_blank\"\u003e\u003cstrong\u003eDownload Product Catalog\u003c\/strong\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0100\/7917\/4734\/files\/DuraPlus_Installation_Manual.pdf?v=1648525317\" target=\"_blank\"\u003e\u003cstrong\u003eDownload Installation Manual\u003c\/strong\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0100\/7917\/4734\/files\/DuraPlus_Installation_Guide.pdf?v=1648525300\" target=\"_blank\"\u003e\u003cstrong\u003eDownload Installation Guide\u003c\/strong\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0100\/7917\/4734\/files\/DuraPlus_Typical_Installation.pdf?v=1648525356\" target=\"_blank\"\u003e\u003cstrong\u003eDownload Typical Installation\u003c\/strong\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCalifornia PROP 65:\u003c\/strong\u003e\u003cspan\u003e This product can expose you to Lead \u0026amp; Chromium, which is known to the State of California to cause cancer and birth defects, or other reproductive harm. See \u003c\/span\u003e\u003ca href=\"https:\/\/usfireplacestore.com\/pages\/ca-prop-65-warning\" target=\"_blank\"\u003eWARNING\u003c\/a\u003e\u003c\/p\u003e","brand":"DuraVent","offers":[{"title":"Default Title","offer_id":47734187589802,"sku":"7DP-CS36","price":565.32,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0100\/7917\/4734\/files\/DuraVent-DuraPlus-7-x-36-Square-Ceiling-Support-Box.jpg?v=1780224329","url":"https:\/\/usfireplacestore.com\/products\/duravent-duraplus-7-x-36-square-ceiling-support-box","provider":"US Fireplace Store","version":"1.0","type":"link"}