{"product_id":"empire-keystone-43-premium-b-vent-fireplace-natural-gas","title":"Empire Keystone 43\" Premium B-Vent Fireplace (Natural Gas)","description":"\u003cp\u003eThe Keystone 43\" Premium is a natural-gas B-vent fireplace - a taller, more traditional firebox that vents vertically through a standard 6\" B-vent system rather than a sealed direct-vent pipe. B-vent draws room air for combustion and carries products of combustion up and out, giving a natural, atmospheric flame over its four-log set.\u003c\/p\u003e\u003cp\u003eIt is rated at 30,000 BTU\/hr on natural gas and is zero-clearance certified for close framing. Millivolt (standing-pilot) and Intermittent-Pilot control builds are offered. A propane conversion kit is available where a tank supply is used.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eThis is a distinctive multi-configuration model, sold as a single build - there is no size selector; confirm your rough opening against the framing data below before ordering.\u003c\/em\u003e\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e43\" B-vent firebox:\u003c\/strong\u003e Taller traditional proportions vented vertically through a 6\" B-vent system.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e30,000 BTU natural gas:\u003c\/strong\u003e Atmospheric B-vent flame over a four-log set.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZero-clearance certified:\u003c\/strong\u003e Approved for close-framed enclosures.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eControl choice:\u003c\/strong\u003e Millivolt standing-pilot or Intermittent-Pilot builds.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePropane-convertible:\u003c\/strong\u003e A certified LP conversion kit is available for tank supply.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal Size\u003c\/td\u003e\n\u003ctd\u003e43\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eB-Vent (atmospheric, vertical vent)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput (Natural Gas)\u003c\/td\u003e\n\u003ctd\u003e30,000 BTU max\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFuel\u003c\/td\u003e\n\u003ctd\u003eNatural Gas (certified LP conversion kit available)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVenting\u003c\/td\u003e\n\u003ctd\u003e6\" diameter B-Vent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFirebox (measured)\u003c\/td\u003e\n\u003ctd\u003eFace width 43\"; height 34-3\/4\" without standoff; depth 18-3\/8\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLog Set\u003c\/td\u003e\n\u003ctd\u003eFour-log set\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIgnition\u003c\/td\u003e\n\u003ctd\u003eMillivolt (standing pilot) or Intermittent Pilot\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertification\u003c\/td\u003e\n\u003ctd\u003eZero-clearance \/ design-certified to the ANSI standard (UL)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003eLimited lifetime (combustion chamber, heat exchanger, factory glass); 3-yr parts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e","brand":"Empire Comfort Systems","offers":[{"title":"Millivolt \/ Louver","offer_id":50213173231855,"sku":"BVP42FP30LN","price":2369.0,"currency_code":"USD","in_stock":true},{"title":"Millivolt \/ Flush Face","offer_id":50213173264623,"sku":"BVP42FP30FN","price":2369.0,"currency_code":"USD","in_stock":true},{"title":"Intermittent Pilot \/ Louver","offer_id":50213173297391,"sku":"BVP42FP70LN","price":2649.0,"currency_code":"USD","in_stock":true},{"title":"Intermittent Pilot \/ Flush Face","offer_id":50213173330159,"sku":"BVP42FP70FN","price":2649.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0761\/5633\/8415\/files\/BVP42FP-1_5779422a-2769-41ce-a78a-77cde53f878a.jpg?v=1784549998","url":"https:\/\/hearthdepot.com\/products\/empire-keystone-43-premium-b-vent-fireplace-natural-gas","provider":"Hearth Depot","version":"1.0","type":"link"}