{"product_id":"harvia-m3-sl-wood-burning-stove","title":"Harvia M3 SL 16.5kW Wood Burning Sauna Stove with Exterior Feed - WKM3SL","description":"\u003ch2\u003eHarvia M3 SL 16.5kW Wood Burning Sauna Stove with Exterior Feed - WKM3SL\u003c\/h2\u003e\n\u003cp\u003eExperience the ultimate in convenience and performance with the \u003cstrong\u003eHarvia M3 SL 16.5kW \u003c\/strong\u003e with Exterior Feed, available at My Sauna World. This efficient stove delivers powerful, consistent heat while allowing easy refueling from outside, so you can enjoy uninterrupted relaxation. As a trusted brand renowned for innovation, Harvia exemplifies quality and reliability, making this stove a vital addition to your wellness routine. Embrace the benefits of regular sauna use, including improved muscle recovery, stress reduction, and better sleep, and elevate your holistic wellness journey today. \u003cbr\u003e\u003c\/p\u003e\n\u003ch5\u003eWhat our Experts Think\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli data-section-id=\"1uqmfvr\" data-start=\"27\" data-end=\"302\"\u003e\n\u003cstrong data-start=\"29\" data-end=\"65\"\u003eClassic Finnish workhorse design\u003c\/strong\u003e\u003cbr data-start=\"65\" data-end=\"68\"\u003eThe \u003cstrong data-start=\"74\" data-end=\"99\"\u003eHarvia M3 SL (WKM3SL)\u003c\/strong\u003e is a proven 16.5kW wood-burning stove built for \u003cstrong data-start=\"148\" data-end=\"193\" data-is-only-node=\"\"\u003esmall to medium saunas (~212–459 cu. ft.)\u003c\/strong\u003e, delivering authentic, traditional sauna heat straight from Finland. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"11tevfc\" data-start=\"304\" data-end=\"572\"\u003e\n\u003cstrong data-start=\"306\" data-end=\"365\"\u003eConvenient external feeding system (SL model advantage)\u003c\/strong\u003e\u003cbr data-start=\"365\" data-end=\"368\"\u003eFirewood is loaded from \u003cstrong data-start=\"394\" data-end=\"420\"\u003eoutside the sauna room\u003c\/strong\u003e, keeping the hot room cleaner, cooler, and more comfortable—while still delivering full wood-fired performance. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"25ggt7\" data-start=\"574\" data-end=\"817\"\u003e\n\u003cstrong data-start=\"576\" data-end=\"619\"\u003eDual-room “fireplace effect” experience\u003c\/strong\u003e\u003cbr data-start=\"619\" data-end=\"622\"\u003eThe cast-iron glass door allows users to enjoy the \u003cstrong data-start=\"675\" data-end=\"719\"\u003evisible flame glow from an adjacent room\u003c\/strong\u003e, combining sauna heating with ambient fireplace ambiance. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"p3r343\" data-start=\"819\" data-end=\"1058\"\u003e\n\u003cstrong data-start=\"821\" data-end=\"870\"\u003eStrong steam production with solid stone mass\u003c\/strong\u003e\u003cbr data-start=\"870\" data-end=\"873\"\u003eSupports around \u003cstrong data-start=\"891\" data-end=\"917\"\u003e66 lbs of sauna stones\u003c\/strong\u003e, producing \u003cstrong data-start=\"929\" data-end=\"988\" data-is-only-node=\"\"\u003econsistent heat retention and rich löyly (steam bursts)\u003c\/strong\u003e for a traditional sauna feel. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1025eab\" data-start=\"1060\" data-end=\"1281\"\u003e\n\u003cstrong data-start=\"1062\" data-end=\"1111\"\u003eEfficient, compact footprint for tight builds\u003c\/strong\u003e\u003cbr data-start=\"1111\" data-end=\"1114\"\u003eSlim vertical design (about 15\" wide) makes it ideal for \u003cstrong data-start=\"1173\" data-end=\"1206\"\u003espace-conscious sauna layouts\u003c\/strong\u003e without sacrificing heating power. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"f3tvfc\" data-start=\"1283\" data-end=\"1517\"\u003e\n\u003cstrong data-start=\"1285\" data-end=\"1329\"\u003eDesigned for real wood sauna enthusiasts\u003c\/strong\u003e\u003cbr data-start=\"1329\" data-end=\"1332\"\u003eDelivers a \u003cstrong data-start=\"1345\" data-end=\"1383\"\u003enatural, radiant wood heat profile\u003c\/strong\u003e with strong airflow circulation—best suited for users who value authenticity over automation. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1wmsoel\" data-start=\"1519\" data-end=\"1740\"\u003e\n\u003cstrong data-start=\"1521\" data-end=\"1552\"\u003eDurable Finnish engineering\u003c\/strong\u003e\u003cbr data-start=\"1552\" data-end=\"1555\"\u003eBuilt with a \u003cstrong data-start=\"1570\" data-end=\"1633\"\u003esteel body, cast-iron framed glass door, and ash box system\u003c\/strong\u003e, designed for long-term high-temperature use and easy maintenance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003eQ\u0026amp;A\u003c\/h5\u003e\n\u003cp data-start=\"107\" data-end=\"298\"\u003e\u003cstrong data-start=\"107\" data-end=\"155\"\u003eQ: What is the Harvia M3 SL WKM3SL used for?\u003c\/strong\u003e\u003cbr data-start=\"155\" data-end=\"158\"\u003eA: It’s a wood-burning sauna stove designed for small to medium saunas, offering traditional Finnish heat with a fireplace-style flame view.\u003c\/p\u003e\n\u003cp data-start=\"300\" data-end=\"540\"\u003e\u003cstrong data-start=\"300\" data-end=\"345\"\u003eQ: What makes the “SL” version different?\u003c\/strong\u003e\u003cbr data-start=\"345\" data-end=\"348\"\u003eA: The SL model has a \u003cstrong data-start=\"370\" data-end=\"396\"\u003efire chamber extension\u003c\/strong\u003e, so you can load wood from another room or outside the sauna for cleaner and more convenient operation. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"542\" data-end=\"704\"\u003e\u003cstrong data-start=\"542\" data-end=\"586\"\u003eQ: What size sauna room does it support?\u003c\/strong\u003e\u003cbr data-start=\"586\" data-end=\"589\"\u003eA: Suitable for sauna rooms approximately \u003cstrong data-start=\"631\" data-end=\"663\"\u003e212–459 cubic feet (6–13 m³)\u003c\/strong\u003e. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"706\" data-end=\"900\"\u003e\u003cstrong data-start=\"706\" data-end=\"732\"\u003eQ: How powerful is it?\u003c\/strong\u003e\u003cbr data-start=\"732\" data-end=\"735\"\u003eA: It delivers a strong \u003cstrong data-start=\"759\" data-end=\"781\"\u003e16.5kW heat output\u003c\/strong\u003e, making it effective for fast heating and maintaining high sauna temperatures. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"902\" data-end=\"1089\"\u003e\u003cstrong data-start=\"902\" data-end=\"943\"\u003eQ: How many sauna stones does it use?\u003c\/strong\u003e\u003cbr data-start=\"943\" data-end=\"946\"\u003eA: It holds about \u003cstrong data-start=\"964\" data-end=\"992\"\u003e66 lbs (30 kg) of stones\u003c\/strong\u003e, which helps produce steady heat and soft steam (löyly). \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"1091\" data-end=\"1295\"\u003e\u003cstrong data-start=\"1091\" data-end=\"1130\"\u003eQ: Can it heat more than one space?\u003c\/strong\u003e\u003cbr data-start=\"1130\" data-end=\"1133\"\u003eA: Yes, it can \u003cstrong data-start=\"1148\" data-end=\"1222\"\u003eheat the sauna room and provide fireplace ambiance to an adjacent room\u003c\/strong\u003e thanks to the glass-door design. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"1297\" data-end=\"1410\"\u003e\u003cstrong data-start=\"1297\" data-end=\"1332\"\u003eQ: Does it require electricity?\u003c\/strong\u003e\u003cbr data-start=\"1332\" data-end=\"1335\"\u003eA: No, it is \u003cstrong data-start=\"1348\" data-end=\"1368\"\u003efully wood-fired\u003c\/strong\u003e, requiring firewood and a chimney system.\u003c\/p\u003e\n\u003cp data-start=\"1412\" data-end=\"1588\"\u003e\u003cstrong data-start=\"1412\" data-end=\"1440\"\u003eQ: What is it made from?\u003c\/strong\u003e\u003cbr data-start=\"1440\" data-end=\"1443\"\u003eA: Built from durable steel with a \u003cstrong data-start=\"1478\" data-end=\"1509\"\u003ecast-iron framed glass door\u003c\/strong\u003e for heat resistance and flame viewing. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"1590\" data-end=\"1741\"\u003e\u003cstrong data-start=\"1590\" data-end=\"1618\"\u003eQ: Is installation easy?\u003c\/strong\u003e\u003cbr data-start=\"1618\" data-end=\"1621\"\u003eA: It requires \u003cstrong data-start=\"1636\" data-end=\"1665\"\u003eprofessional installation\u003c\/strong\u003e, including proper chimney routing, safety clearances, and floor protection.\u003c\/p\u003e\n\u003cp data-start=\"1743\" data-end=\"1957\"\u003e\u003cstrong data-start=\"1743\" data-end=\"1778\"\u003eQ: Why choose this sauna stove?\u003c\/strong\u003e\u003cbr data-start=\"1778\" data-end=\"1781\"\u003eA: It’s a \u003cstrong data-start=\"1791\" data-end=\"1862\"\u003eclassic Finnish wood sauna heater with external loading convenience\u003c\/strong\u003e, strong heat output, and a cozy flame-view experience—ideal for traditional sauna enthusiasts.\u003c\/p\u003e\n\u003ch5\u003eMaintenance Tips\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli data-section-id=\"11wbsp5\" data-start=\"103\" data-end=\"274\"\u003e\n\u003cstrong data-start=\"105\" data-end=\"135\"\u003eClean ash after every use:\u003c\/strong\u003e Remove cooled ash regularly to maintain strong airflow, faster ignition, and efficient combustion. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1t79wl7\" data-start=\"275\" data-end=\"435\"\u003e\n\u003cstrong data-start=\"277\" data-end=\"312\"\u003eInspect chimney \u0026amp; flue monthly:\u003c\/strong\u003e Check for soot buildup or blockages to ensure safe draft and prevent smoke issues. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1mdmfi5\" data-start=\"436\" data-end=\"555\"\u003e\n\u003cstrong data-start=\"438\" data-end=\"470\"\u003eUse only dry, seasoned wood:\u003c\/strong\u003e Wet wood reduces heat output, increases smoke, and causes faster creosote buildup.\u003c\/li\u003e\n\u003cli data-section-id=\"1uds82q\" data-start=\"556\" data-end=\"720\"\u003e\n\u003cstrong data-start=\"558\" data-end=\"595\"\u003eRe-stack sauna stones (annually):\u003c\/strong\u003e Replace cracked stones and ensure proper spacing for even heat and steam production. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"11mf6a7\" data-start=\"721\" data-end=\"878\"\u003e\n\u003cstrong data-start=\"723\" data-end=\"769\"\u003eMaintain stone coverage over fire chamber:\u003c\/strong\u003e Keep stones properly arranged so heating efficiency stays consistent and elements\/structure are protected.\u003c\/li\u003e\n\u003cli data-section-id=\"7rg04\" data-start=\"879\" data-end=\"1016\"\u003e\n\u003cstrong data-start=\"881\" data-end=\"928\"\u003eCheck exterior feed fire chamber regularly:\u003c\/strong\u003e Ensure feed door seals properly and remains free of ash or debris for safe operation.\u003c\/li\u003e\n\u003cli data-section-id=\"pyoeya\" data-start=\"1017\" data-end=\"1184\"\u003e\n\u003cstrong data-start=\"1019\" data-end=\"1054\"\u003eClean air intake \u0026amp; draft paths:\u003c\/strong\u003e Good airflow is critical—blocked vents reduce heat performance and cause poor combustion. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1l0jmb4\" data-start=\"1185\" data-end=\"1306\"\u003e\n\u003cstrong data-start=\"1187\" data-end=\"1223\"\u003eInspect stove body \u0026amp; glass door:\u003c\/strong\u003e Look for rust, cracks, or soot buildup and clean with a dry cloth after cooling.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Harvia","offers":[{"title":"Default Title","offer_id":45598056480959,"sku":"WKM3SL","price":1062.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0683\/5703\/0079\/files\/HARVIA_M3_SL_WOOD_BURNING_STOVE_1_1.png?v=1777374790","url":"https:\/\/www.mybackyardzone.com\/products\/harvia-m3-sl-wood-burning-stove","provider":"Your Outdoor Setup Starts Here","version":"1.0","type":"link"}