{"product_id":"empire-keystone-37-deluxe-b-vent-fireplace-natural-gas","title":"Empire Keystone 37\" Deluxe B-Vent Fireplace (Natural Gas)","description":"\u003cp\u003eThe Keystone 37 is the honest classic of the vented budget tier: a B-vent gas fireplace that uses simple 4-inch vertical venting - the same pipe logic as a water heater - instead of expensive coaxial systems, and prices accordingly. Empire rates it plainly as supplemental room heat and ambience, 21,000 BTU of it, with your choice of millivolt or intermittent-pilot ignition and a louvered or flush face, all under this listing.\u003c\/p\u003e\u003cp\u003eThe shallow 14-7\/8-inch chassis is the practical star: it frames into walls too thin for most direct-vent boxes, with zero clearance to combustibles on every casing surface.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eThis product is part of the Keystone Deluxe B-Vent family - use the selector above to compare sizes and control options.\u003c\/em\u003e\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSimple 4\" B-vent:\u003c\/strong\u003e vertical venting without coaxial pipe - the budget-honest route to a real vented flame.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e21,000 BTU supplemental heat:\u003c\/strong\u003e rated as room heat and ambience, never as a furnace substitute.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour variants:\u003c\/strong\u003e millivolt or IP ignition, louvered or flush face - the flush version tiles in like masonry.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShallowest vented Empire fireplace:\u003c\/strong\u003e 14-7\/8\" deep; frames at just 14-3\/8\" of cavity depth.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePropane path:\u003c\/strong\u003e the \u003ca href=\"\/products\/empire-natural-gas-to-propane-conversion-kit-for-keystone-b-vent-fireplaces\"\u003ecertified BVCK conversion kit\u003c\/a\u003e converts the millivolt valve; IP valves use factory kits.\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\u003e37\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput (Natural Gas)\u003c\/td\u003e\n\u003ctd\u003e21,000 BTU max\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFuel\u003c\/td\u003e\n\u003ctd\u003eNatural Gas (certified propane conversion kit available)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVenting\u003c\/td\u003e\n\u003ctd\u003eB-Vent, 4\" diameter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeat Class\u003c\/td\u003e\n\u003ctd\u003eSupplemental room heat \/ decorative appliance (not a primary heat source)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eControl\u003c\/td\u003e\n\u003ctd\u003eMillivolt or Intermittent Pilot; louvered or flush face (by variant)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUnit (measured)\u003c\/td\u003e\n\u003ctd\u003e32-3\/4\" H x 37\" W x 14-7\/8\" D\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFraming (measured)\u003c\/td\u003e\n\u003ctd\u003e35-3\/4\" H x 37-3\/8\" W x 14-3\/8\" D\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eClearance to Combustibles\u003c\/td\u003e\n\u003ctd\u003e0\" back, sides, floor, top stand-off; 1\" top framing edge; 36\" to ceiling; 6\" sidewall\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGas Connection\u003c\/td\u003e\n\u003ctd\u003e1\/2\" NPT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003eLimited lifetime (glass, combustion chamber, heat exchanger); 3-yr parts; 1-yr accessories\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch2\u003eInstallation \u0026amp; Planning\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFraming:\u003c\/strong\u003e 35-3\/4\" H x 37-3\/8\" W x 14-3\/8\" D in ordinary 2x4 lumber, with the face extending 1\/2\" proud for finishing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClearances:\u003c\/strong\u003e 0\" at back, sides, floor and top stand-off; 1\" at the top framing edge; 6\" to a sidewall; 36\" to the ceiling; only non-combustible material over the black front\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFacing:\u003c\/strong\u003e the mantel chart starts combustible trim 1\/4\" above the top edge at 3\/4\" projection; a flush mantel base adds 3-3\/4\" to framed height\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVenting:\u003c\/strong\u003e 4\"-diameter B-vent run vertically\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGas:\u003c\/strong\u003e 1\/2\" NPT connection\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eControl:\u003c\/strong\u003e millivolt or intermittent-pilot valve; the \u003ca href=\"\/products\/empire-remote-control-accessory\"\u003eFRBC battery remote\u003c\/a\u003e and \u003ca href=\"\/products\/empire-on-off-wall-switch-accessory\"\u003eFWS-1 wall switch\u003c\/a\u003e are the two factory-listed options\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eCold-climate installs against exterior walls should be insulated to code.\u003c\/p\u003e","brand":"Empire Comfort Systems","offers":[{"title":"Millivolt \/ Louver","offer_id":50213172773103,"sku":"BVD34FP30LN","price":1589.0,"currency_code":"USD","in_stock":true},{"title":"Millivolt \/ Flush Face","offer_id":50213172805871,"sku":"BVD34FP30FN","price":1589.0,"currency_code":"USD","in_stock":true},{"title":"Intermittent Pilot \/ Louver","offer_id":50213172838639,"sku":"BVD34FP70LN","price":1829.0,"currency_code":"USD","in_stock":true},{"title":"Intermittent Pilot \/ Flush Face","offer_id":50213172871407,"sku":"BVD34FP70FN","price":1829.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0761\/5633\/8415\/files\/BVD-1_33056aad-470e-43c5-b8a5-a6393e3f5e6c.jpg?v=1784549984","url":"https:\/\/hearthdepot.com\/products\/empire-keystone-37-deluxe-b-vent-fireplace-natural-gas","provider":"Hearth Depot","version":"1.0","type":"link"}