{"product_id":"osburn-3500-large-wood-insert-ob03510","title":"Osburn 3500 Large Wood Insert OB03510","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\n\u003cp\u003eThe Osburn 3500 wood insert combines power, efficiency, and safety. Sober lines give way to one of the largest glass surfaces in its category, blending perfectly with the architecture of your home.\u003c\/p\u003e\n\u003cp\u003eBecause every house is unique, choose the door overlay, faceplate, and trims that suit you — no harsh winter can resist it.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOne of the largest glass viewing areas in its category\u003c\/li\u003e\n\u003cli\u003eVery low emissions — 1.6 g\/h at 77% optimum efficiency\u003c\/li\u003e\n\u003cli\u003eHeat-activated blower included\u003c\/li\u003e\n\u003cli\u003eFully customizable door overlay, faceplate, and trim finishes\u003c\/li\u003e\n\u003cli\u003eTakes logs up to 22\" long\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOsburn 3500 insert body, metallic black finish\u003c\/li\u003e\n\u003cli\u003eHeat-activated blower\u003c\/li\u003e\n\u003cli\u003e6\" flue collar\u003c\/li\u003e\n\u003cli\u003eOwner's manual \u0026amp; installation instructions\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eRequired accessories (choose finish, purchased separately):\u003c\/strong\u003e black or brushed nickel door overlay (OA10163\/OA10164), faceplate kit – 32\"x44\" (OA10032) or 32\"x50\" (OA10033), black or brushed nickel faceplate trims (OA10125\/OA10126, OA10128\/OA10129).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOptional accessories:\u003c\/strong\u003e firescreen door (AC01281), 5\" fresh air intake kit, offset liner adaptor, glass ash lip (OA10166).\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable style=\"border-collapse:collapse;width:100%;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"padding:10px 6px 4px;border:none;\"\u003e\u003cstrong\u003ePerformance\u003c\/strong\u003e\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;width:50%;\"\u003eCombustion technology\u003c\/td\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003eNon-catalytic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;width:50%;\"\u003eMaximum heat output (dry cordwood)\u003c\/td\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003e110,000 BTU\/h (32.2 kW)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;width:50%;\"\u003eRecommended heating area\u003c\/td\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003e1,000–2,700 sq. ft.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;width:50%;\"\u003eAverage particulate emissions\u003c\/td\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003e1.6 g\/h\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;width:50%;\"\u003eOptimum efficiency\u003c\/td\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003e77%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;width:50%;\"\u003eMaximum burn time\u003c\/td\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003e10 hours\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"padding:10px 6px 4px;border:none;\"\u003e\u003cstrong\u003eFirebox\u003c\/strong\u003e\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;width:50%;\"\u003eFirebox volume\u003c\/td\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003e3.5 cu. ft.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;width:50%;\"\u003eMaximum log length\u003c\/td\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003e22\" (16\" recommended)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;width:50%;\"\u003eFirebox dimensions (W x H x D)\u003c\/td\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003e22 7\/8\" x 12 7\/8\" x 20 1\/8\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;width:50%;\"\u003eDoor opening (W x H)\u003c\/td\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003e19\" x 9 7\/8\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;width:50%;\"\u003eGlass viewing area (W x H)\u003c\/td\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003e19\" x 11 3\/4\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;width:50%;\"\u003eDoor frame\u003c\/td\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003eCast iron\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"padding:10px 6px 4px;border:none;\"\u003e\u003cstrong\u003eDimensions \u0026amp; Clearances\u003c\/strong\u003e\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;width:50%;\"\u003eFlue spigot diameter\u003c\/td\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003e6\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;width:50%;\"\u003eExterior height x width x depth\u003c\/td\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003e24 7\/8\" x 30 3\/8\" x 29\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;width:50%;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003e540 lb (245 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;width:50%;\"\u003eClearance – adjacent sidewall\u003c\/td\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003e19\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;width:50%;\"\u003eClearance – combustible side surround\u003c\/td\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003e9\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;width:50%;\"\u003eClearance – combustible top surround\u003c\/td\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003e27\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;width:50%;\"\u003eMinimum fireplace opening (H x W x D)\u003c\/td\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003e26 1\/4\" x 31\" x 18 3\/8\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;width:50%;\"\u003eMinimum floor protection, front\u003c\/td\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003e27\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"padding:10px 6px 4px;border:none;\"\u003e\u003cstrong\u003eCertification\u003c\/strong\u003e\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;width:50%;\"\u003eColor\u003c\/td\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003eMetallic black\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;width:50%;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003eLifetime, limited\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;width:50%;\"\u003eSafety standard\u003c\/td\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003eUL 1482, UL 737, ULC S628, NFPA 211, CSA B365\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;width:50%;\"\u003eEmissions \/ efficiency standard\u003c\/td\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003eEPA \/ CSA B415.1-10\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Osburn","offers":[{"title":"Default Title","offer_id":48312571068574,"sku":"OB03510","price":3819.0,"currency_code":"USD","in_stock":false}],"url":"https:\/\/usfireplaceshop.com\/products\/osburn-3500-large-wood-insert-ob03510","provider":"US Fireplace Shop","version":"1.0","type":"link"}