{"product_id":"dura-plus-7-ceiling-support","title":"DuraVent - DuraPlus 7\" Inner Diameter Square Ceiling Support Box","description":"\u003cdiv data-testid=\"conversation-turn-3\" class=\"group w-full text-token-text-primary border-b border-black\/10 gizmo:border-0 dark:border-gray-900\/50 gizmo:dark:border-0 bg-gray-50 gizmo:bg-transparent dark:bg-[#444654] gizmo:dark:bg-transparent\"\u003e\n\u003cdiv class=\"p-4 justify-center text-base md:gap-6 md:py-6 m-auto\"\u003e\n\u003cdiv class=\"flex flex-1 gap-4 text-base mx-auto md:gap-6 gizmo:gap-3 gizmo:md:px-5 gizmo:lg:px-1 gizmo:xl:px-5 md:max-w-3xl }\"\u003e\n\u003cdiv class=\"relative flex w-[calc(100%-50px)] flex-col gap-1 gizmo:w-full md:gap-3 lg:w-[calc(100%-115px)] agent-turn\"\u003e\n\u003cdiv class=\"flex flex-grow flex-col gap-3 max-w-full\"\u003e\n\u003cdiv class=\"min-h-[20px] flex flex-col items-start gap-3 whitespace-pre-wrap break-words overflow-x-auto\"\u003e\n\u003cdiv class=\"markdown prose w-full break-words dark:prose-invert light\"\u003e\n\u003cp\u003eUpgrade your chimney system with the DuraVent DuraPlus 7\" Square Ceiling Support Box. This essential component is meticulously engineered to elevate safety and performance. Say goodbye to worries about overheating and creosote fires, and step into a world of superior chimney efficiency.\u003c\/p\u003e\n\u003cp\u003eDuraPlus is your trusted solution for maintaining a cool exterior while generating a hot draft within. Its innovative design includes two insulating layers – a refractory blanket and an airspace – ensuring consistent heat distribution and eliminating those troublesome hot spots common in traditional insulation. Even in the event of a creosote fire, the compressible blanket insulation allows the chimney liner to expand safely, preventing damage to your chimney and your home.\u003c\/p\u003e\n\u003cp\u003eCrafted to endure continuous operation at temperatures of up to 1000°F, DuraPlus surpasses the stringent HT requirements of the UL standard. It has been rigorously tested, enduring one hour at 1400°F and three ten-minute chimney fire tests at a blistering 2100°F. With DuraPlus, you can trust in its exceptional fire-safe design, safeguarding both your chimney and your home.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eBenefits:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEnhanced Stove Efficiency\u003c\/li\u003e\n\u003cli\u003eSuperior Insulation for Heat Retention\u003c\/li\u003e\n\u003cli\u003eFire-Safe Design Protects Your Home\u003c\/li\u003e\n\u003cli\u003eVersatile Design for Various Ceiling Types\u003c\/li\u003e\n\u003cli\u003eBuilt-In Starter Section for Easy Installation\u003c\/li\u003e\n\u003cli\u003eSupports up to 35 Feet of DuraPlus Chimney\u003c\/li\u003e\n\u003cli\u003ePrecision Twist-Lock Connection for Security\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ch3\u003eFeatures:\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\u003ch3\u003e\u003cstrong\u003eMaterials and Construction:\u003c\/strong\u003e\u003c\/h3\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\u003ch3\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ch3\u003eSpecifications:\u003c\/h3\u003e\n\u003ctable style=\"width: 534px;\" data-mce-style=\"width: 534px;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 126px;\" data-mce-style=\"width: 126px;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"width: 115px;\" data-mce-style=\"width: 115px;\"\u003e7DP-CS11\u003c\/td\u003e\n\u003ctd style=\"width: 137px;\" data-mce-style=\"width: 137px;\"\u003e7DP-CS24\u003c\/td\u003e\n\u003ctd style=\"width: 126px;\" data-mce-style=\"width: 126px;\"\u003e7DP-CS36\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 126px;\" data-mce-style=\"width: 126px;\"\u003eDiameter\u003c\/td\u003e\n\u003ctd style=\"width: 115px;\" data-mce-style=\"width: 115px;\"\u003e7\" (inner)\u003c\/td\u003e\n\u003ctd style=\"width: 137px;\" data-mce-style=\"width: 137px;\"\u003e7\" (inner)\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 126px;\" data-mce-style=\"width: 126px;\"\u003e7\" (inner)\u003cbr\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 126px;\" data-mce-style=\"width: 126px;\"\u003eDimension\u003c\/td\u003e\n\u003ctd style=\"width: 115px;\" data-mce-style=\"width: 115px;\"\u003e11\" (A) x 18.25\" (W)\u003c\/td\u003e\n\u003ctd style=\"width: 137px;\" data-mce-style=\"width: 137px;\"\u003e24\" (A) x 18.25\" (W)\u003c\/td\u003e\n\u003ctd style=\"width: 126px;\" data-mce-style=\"width: 126px;\"\u003e36\" (A) x 18.25\" (W)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 126px;\" data-mce-style=\"width: 126px;\"\u003eClearances\u003c\/td\u003e\n\u003ctd colspan=\"3\" style=\"width: 378px;\" data-mce-style=\"width: 378px;\"\u003e2\" clearance to combustible.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 126px;\" data-mce-style=\"width: 126px;\"\u003eListings\u003c\/td\u003e\n\u003ctd colspan=\"3\" style=\"width: 378px;\" data-mce-style=\"width: 378px;\"\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: 126px;\" data-mce-style=\"width: 126px;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd colspan=\"3\" style=\"width: 378px;\" data-mce-style=\"width: 378px;\"\u003eLimited-lifetime warranty\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cdiv style=\"text-align: center;\" data-mce-style=\"text-align: center;\"\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: center;\" data-mce-style=\"text-align: center;\"\u003e\n\u003ctable width=\"100%\" style=\"text-align: left;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 524px;\" data-mce-style=\"width: 524px;\"\u003e\n\u003cdiv style=\"text-align: center;\" data-mce-style=\"text-align: center;\"\u003e\u003cstrong\u003eCeiling Pitch Table\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: center;\" data-mce-style=\"text-align: center;\"\u003e\n\u003ctable width=\"100%\" style=\"text-align: left;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: left;\" data-mce-style=\"text-align: left;\"\u003eDuraBlack\u003c\/td\u003e\n\u003ctd style=\"text-align: left;\" data-mce-style=\"text-align: left;\"\u003eDVL\u003c\/td\u003e\n\u003ctd style=\"text-align: left;\" data-mce-style=\"text-align: left;\"\u003eUSE\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: left;\" data-mce-style=\"text-align: left;\"\u003e0\/12-4\/12\u003c\/td\u003e\n\u003ctd style=\"text-align: left;\" data-mce-style=\"text-align: left;\"\u003e0\/12-6\/12\u003c\/td\u003e\n\u003ctd style=\"text-align: left;\" data-mce-style=\"text-align: left;\"\u003e11\" Support Box\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: left;\" data-mce-style=\"text-align: left;\"\u003e5\/12-9\/12\u003c\/td\u003e\n\u003ctd style=\"text-align: left;\" data-mce-style=\"text-align: left;\"\u003e7\/12-13\/12\u003c\/td\u003e\n\u003ctd style=\"text-align: left;\" data-mce-style=\"text-align: left;\"\u003e24\" Support Box\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: left;\" data-mce-style=\"text-align: left;\"\u003e10\/12-14\/12\u003c\/td\u003e\n\u003ctd style=\"text-align: left;\" data-mce-style=\"text-align: left;\"\u003e14\/12-20\/12\u003c\/td\u003e\n\u003ctd style=\"text-align: left;\" data-mce-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\u003ch3\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ch3\u003eDownloads:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"color: #ff8000;\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0591\/9912\/7740\/files\/DuraPlus_Brochure.pdf?v=1696776293\" style=\"color: #ff8000;\"\u003e\u003cstrong\u003eProduct Brochure\u003c\/strong\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"color: #ff8000;\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0591\/9912\/7740\/files\/DuraPlus_Catalog.pdf?v=1696776356\" style=\"color: #ff8000;\"\u003e\u003cstrong\u003eProduct Catalog\u003c\/strong\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"color: #ff8000;\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0591\/9912\/7740\/files\/DuraPlus_Installation_Manual.pdf?v=1696776408\" style=\"color: #ff8000;\"\u003e\u003cstrong\u003eInstallation Manual\u003c\/strong\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"color: #ff8000;\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0591\/9912\/7740\/files\/DuraPlus_Installation_Guide.pdf?v=1696776460\" style=\"color: #ff8000;\"\u003e\u003cstrong\u003eInstallation Guide\u003c\/strong\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"color: #ff8000;\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0591\/9912\/7740\/files\/DuraPlus_Typical_Installation_423de4cc-b135-4032-a78f-28518d97fa67.pdf?v=1696776510\" style=\"color: #ff8000;\"\u003e\u003cstrong\u003eTypical Installation\u003c\/strong\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eAbout the Manufacturer:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp class=\"safety-warning\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0591\/9912\/7740\/files\/Duravent_Logo_TM_RGB-1024x179_240x240.png?v=1693424318\"\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eConsistently the first to market with new innovations in venting systems, DuraVent has captured a leadership position in emerging markets. DuraVent has patents for several products and continues to design safe and technologically advanced venting.The company’s research into solving problems with corrosion, when biofuels such as corn are used, led to the break-through patent for PelletVent Pro.\u003c\/p\u003e","brand":"DuraVent","offers":[{"title":"11\"","offer_id":53065249751339,"sku":"7DP-CS11","price":310.51,"currency_code":"USD","in_stock":true},{"title":"24\"","offer_id":53065249784107,"sku":"7DP-CS24","price":377.05,"currency_code":"USD","in_stock":true},{"title":"36\"","offer_id":53065249816875,"sku":"7DP-CS36","price":439.15,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0968\/8491\/6523\/files\/chimney-components-duravent-duraplus-7-inner-diameter-square-ceiling-support-box-33432960139434.jpg?v=1775146753","url":"https:\/\/nationfireplace.com\/products\/dura-plus-7-ceiling-support","provider":"nationfireplace.com","version":"1.0","type":"link"}