{"product_id":"harvia-m3-sl-wood-burning-heater-external-feed","title":"Harvia M3 SL Wood Burning Heater | External Feed","description":"\u003cp\u003e\u003cstrong\u003eTraditional Sauna Heating with External Feed Convenience and Dual-Room Enjoyment\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe Harvia M3 SL WKM3SL wood-burning sauna heater combines authentic sauna performance with the added convenience of an external feed system. Designed for small and medium-sized sauna spaces, this heater allows firewood to be loaded from an adjacent room, creating a cleaner sauna environment while extending the experience beyond the steam room itself.\u003c\/p\u003e\n\u003cp\u003eThe external-feed design creates a dual-purpose experience by functioning as both a sauna heater and a fireplace. While the sauna room enjoys rich heat and steam, the adjacent room can benefit from the warm glow visible through the cast-iron framed glass door. Designed and manufactured in Finland, the M3 SL combines traditional sauna atmosphere with practical functionality.\u003c\/p\u003e\n\u003cp\u003eBuilt for dependable performance and flexible installation, this heater brings warmth and ambiance to multiple spaces.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eExternal Feed Design:\u003c\/strong\u003e Allows firewood loading from an adjacent room.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDual-Room Heating Experience:\u003c\/strong\u003e Functions as both a sauna heater and fireplace.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eWood-Burning Sauna Heater:\u003c\/strong\u003e Provides an authentic traditional sauna atmosphere.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eCast-Iron Framed Glass Door:\u003c\/strong\u003e Creates visible fire ambiance in the adjoining space.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDesigned for Small and Medium Saunas:\u003c\/strong\u003e Delivers balanced heat and steam performance.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eFloor-Mounted Installation:\u003c\/strong\u003e Stable and practical heater positioning.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eUpper Connection Opening:\u003c\/strong\u003e Supports flexible chimney installation.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eSoot Access Opening:\u003c\/strong\u003e Designed for easier maintenance access.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDesigned and Manufactured in Finland:\u003c\/strong\u003e Built according to Harvia quality standards.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eModel:\u003c\/strong\u003e WKM3SL\u003cbr\u003e\u003cstrong\u003eSeries:\u003c\/strong\u003e M3 SL\u003cbr\u003e\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Wood-Burning Sauna Heater\u003cbr\u003e\u003cstrong\u003eFuel Loading Type:\u003c\/strong\u003e External Feed\u003cbr\u003e\u003cstrong\u003eInstallation Type:\u003c\/strong\u003e Floor Model\u003cbr\u003e\u003cstrong\u003eSauna Room Capacity:\u003c\/strong\u003e 212–459 cu. ft.\u003cbr\u003e\u003cstrong\u003eStone Capacity Requirement:\u003c\/strong\u003e Minimum 66 lbs\u003cbr\u003e\u003cstrong\u003eStone Requirement:\u003c\/strong\u003e 2 Boxes AC3020\u003cbr\u003e\u003cstrong\u003eDoor Type:\u003c\/strong\u003e Cast-Iron Framed Glass Door\u003cbr\u003e\u003cstrong\u003eConnection Type:\u003c\/strong\u003e Upper Connection Opening\u003cbr\u003e\u003cstrong\u003eMaintenance Access:\u003c\/strong\u003e Soot Opening\u003cbr\u003e\u003cstrong\u003eCountry of Manufacture:\u003c\/strong\u003e Finland\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWidth:\u003c\/strong\u003e 15.3\" (390 mm)\u003cbr\u003e\u003cstrong\u003eDepth:\u003c\/strong\u003e 25\" (640 mm)\u003cbr\u003e\u003cstrong\u003eHeight:\u003c\/strong\u003e 28\" (715 mm)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eManufacturer Note:\u003c\/strong\u003e Natural sauna stones vary in shape and size. Additional stones may be recommended for optimal arrangement and performance.\u003c\/p\u003e","brand":"Harvia","offers":[{"title":"Default Title","offer_id":51061135474921,"sku":"WKM3SL","price":1416.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0788\/2575\/0761\/files\/61IbZLNrAfL._AC_UF894_1000_QL80.webp?v=1779108376","url":"https:\/\/betweenliving.com\/products\/harvia-m3-sl-wood-burning-heater-external-feed","provider":"Between Living","version":"1.0","type":"link"}