{"product_id":"duravent-7dp-cs24-7-x-24-duraplus-square-ceiling-support-box","title":"DuraVent 7DP-CS24 7\" x 24\" DuraPlus Square Ceiling Support Box","description":"\u003cp data-path-to-node=\"1\"\u003e\u003cspan\u003eBuild the perfect custom venting system for your heating appliance with the DuraVent 7\" x 24\" DuraPlus Square Ceiling Support Box.\u003c\/span\u003e\u003cspan\u003e Designed for exceptional performance and long-lasting durability,\u003c\/span\u003e\u003cspan\u003e this essential structural component is expertly engineered for use with flat,\u003c\/span\u003e\u003cspan\u003e vaulted,\u003c\/span\u003e\u003cspan\u003e or cathedral ceilings to safely support up to 35 feet of 7-inch triple-wall DuraPlus chimney pipe.\u003c\/span\u003e\u003cspan\u003e Featuring a 7-inch inner diameter with a built-in starter section and measuring 24\" (A) x 18.\u003c\/span\u003e\u003cspan\u003e25\" (W),\u003c\/span\u003e\u003cspan\u003e it locks tightly into your chimney run using a precision twist-lock connection.\u003c\/span\u003e\u003cspan\u003e Specifically sized for medium-to-steep roof pitches,\u003c\/span\u003e\u003cspan\u003e this 24-inch support box accommodates ceiling pitches from 5\/12 to 9\/12 when paired with DuraBlack single-wall pipe,\u003c\/span\u003e\u003cspan\u003e or 7\/12 to 13\/12 when paired with DVL double-wall connector pipe (stove pipe adapters sold separately).\u003c\/span\u003e\u003cspan\u003e Finished in an attractive painted black coating,\u003c\/span\u003e\u003cspan\u003e it comes complete with matching trim right in the box for a clean,\u003c\/span\u003e\u003cspan\u003e finished interior look.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-path-to-node=\"2\"\u003e\u003cspan\u003eEngineered for professional hearth contractors and dedicated DIY homeowners,\u003c\/span\u003e\u003cspan\u003e this premium square ceiling support box (model 7DP-CS24) guarantees a fast,\u003c\/span\u003e\u003cspan\u003e reliable assembly for a fully code-compliant installation.\u003c\/span\u003e\u003cspan\u003e Tested and listed to strict UL 103 HT safety standards and backed by a limited-lifetime warranty,\u003c\/span\u003e\u003cspan\u003e it provides dependable,\u003c\/span\u003e\u003cspan\u003e long-term stability for your high-temperature venting system.\u003c\/span\u003e\u003cspan\u003e As with all DuraPlus installations,\u003c\/span\u003e\u003cspan class=\"\"\u003e always remember to maintain a strictly mandatory 2-inch minimum airspace clearance to all combustible materials throughout your main chimney run.\u003c\/span\u003e\u003cspan class=\"\"\u003e Complete your residential wood stove or fireplace exhaust setup safely today with this indispensable DuraPlus support component!\u003c\/span\u003e\u003c\/p\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\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\u003eSpecifications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003e7DP-CS24\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDiameter\u003c\/td\u003e\n\u003ctd\u003e7\" (inner)\u003cbr\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimension\u003c\/td\u003e\n\u003ctd\u003e24\" (A) x 18.25\" (W)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eClearances\u003c\/td\u003e\n\u003ctd\u003e2\" clearance to combustible.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eListings\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eUL Listed to UL 103HT (MH7399).\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003eLimited-lifetime warranty\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv\u003e\u003cstrong\u003eCeiling Pitch Table\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eDuraBlack\u003c\/td\u003e\n\u003ctd\u003eDVL\u003c\/td\u003e\n\u003ctd\u003eUSE\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e0\/12-4\/12\u003c\/td\u003e\n\u003ctd\u003e0\/12-6\/12\u003c\/td\u003e\n\u003ctd\u003e11\" Support Box\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e5\/12-9\/12\u003c\/td\u003e\n\u003ctd\u003e7\/12-13\/12\u003c\/td\u003e\n\u003ctd\u003e24\" Support Box\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e10\/12-14\/12\u003c\/td\u003e\n\u003ctd\u003e14\/12-20\/12\u003c\/td\u003e\n\u003ctd\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\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0718\/5022\/9802\/files\/DTDP_-_Square_Ceiling_Support_Box_5b079bd9-3251-4fa9-a0ef-3cc7234c39f7.png?v=1792836017\" alt=\"\"\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ch3\u003e\u003cspan\u003eWarranty\u003c\/span\u003e\u003c\/h3\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 45.2979%;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0718\/5022\/9802\/files\/ChatGPT_Image_Jun_18_2026_02_25_23_PM.png?v=1781771144\" alt=\"\"\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 54.3543%;\"\u003eDuravent, Inc. (“Duravent”) provides this limited lifetime warranty for all of its products with the exception of Ventinox® (lifetime), and PolyPro® (ten years). Subject to the limitations set forth below, Duravent warrants that its products will be free from defects in material or manufacturing, if properly installed, maintained and used.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3 style=\"color: rgb(255, 128, 0);\"\u003e\u003cspan style=\"color: rgb(48, 48, 48); font-size: 0.875rem;\"\u003eAbout The Manufacturer\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan style=\"color: rgb(48, 48, 48); font-size: 0.875rem;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0718\/5022\/9802\/files\/Duravent_Logo.png?v=1789738697\" alt=\"\" width=\"411\" height=\"124\" style=\"display: block; margin-left: auto; margin-right: auto;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eDuraVent is a leading manufacturer of high-quality chimney and venting systems for residential and commercial applications. The company provides reliable solutions for wood, gas, pellet, and oil-burning appliances. Its products are rigorously tested to meet strict safety standards in the United States and Canada. DuraVent systems are engineered for durability, dependable performance, and long-term protection. Innovative features such as twist-lock connections help make installation faster, easier, and more secure. Trusted by homeowners and industry professionals, DuraVent is a recognized leader in venting technology.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"DuraVent","offers":[{"title":"Default Title","offer_id":53121524138271,"sku":"7DP-CS24","price":519.35,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0718\/5022\/9802\/files\/DuraVent_7DP-CS36_7_x_36_DuraPlus_Square_Ceiling_Support_Box.jpg?v=1792836605","url":"https:\/\/ridgeflame.com\/products\/duravent-7dp-cs24-7-x-24-duraplus-square-ceiling-support-box","provider":"Ridge Flame","version":"1.0","type":"link"}