{"product_id":"harvia-m-series-16-5kw-wood-sauna-stove-w-exterior-feed","title":"Harvia M3 SL 16.5kW Wood-Burning Sauna Stove with Exterior Feed","description":"\u003cdiv style=\"max-width: 1200px; margin: 0 auto; font-family: Arial, sans-serif; color: #222; line-height: 1.6; font-size: 15px;\"\u003e\n\u003ch1 style=\"font-size: 28px; margin-bottom: 10px;\"\u003eHarvia M3 SL 16.5kW Wood-Burning Sauna Stove with Exterior Feed\u003c\/h1\u003e\n\u003cp style=\"font-size: 15px; margin-bottom: 18px;\"\u003eEnjoy a traditional wood-fired sauna experience with added convenience using the \u003cstrong\u003eHarvia M3 SL\u003c\/strong\u003e, a \u003cstrong\u003e16.5kW wood-burning sauna stove\u003c\/strong\u003e designed for sauna rooms from \u003cstrong\u003e212 to 459 cubic feet\u003c\/strong\u003e. This unique model is installed in the sauna room while firewood is loaded from the opposite side of the wall, making it an excellent choice for layouts that benefit from exterior feed access. The M3 SL can help warm two adjoining spaces while creating a classic sauna atmosphere with the glow of flames visible through its cast-iron-framed glass door.\u003c\/p\u003e\n\u003cdiv style=\"margin: 12px 0 18px 0; padding: 14px 16px; border: 1px solid #d9d9d9; border-radius: 8px; background: #f8f8f8; font-size: 15px;\"\u003e\n\u003cstrong style=\"display: block; margin-bottom: 8px; font-size: 15px;\"\u003eShop with Confidence\u003c\/strong\u003e\n\u003cul style=\"margin: 0; padding-left: 18px; font-size: 15px;\"\u003e\n\u003cli\u003eAuthorized Retailer of Harvia\u003c\/li\u003e\n\u003cli\u003eManufacturer Warranty Included\u003c\/li\u003e\n\u003cli\u003eFree Shipping to the Contiguous US\u003c\/li\u003e\n\u003cli\u003eSecure Checkout\u003c\/li\u003e\n\u003cli\u003eU.S.-Based Customer Support\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdetails open=\"\" style=\"margin-bottom: 12px;\"\u003e\n\u003csummary style=\"font-weight: bold; font-size: 16px; cursor: pointer;\"\u003eProduct Overview\u003c\/summary\u003e\n\u003cdiv style=\"padding-top: 12px; font-size: 15px;\"\u003e\n\u003cp\u003eThe \u003cstrong\u003eHarvia M3 SL\u003c\/strong\u003e is designed for sauna owners who want the traditional feel of a wood-burning stove with the added practicality of loading firewood from outside the sauna room. This through-wall design helps keep the sauna area cleaner while allowing someone in the adjoining room to enjoy the warmth and ambiance of the fire through the cast-iron-framed glass door.\u003c\/p\u003e\n\u003cp\u003eIdeal for small to medium sauna rooms, the M3 SL delivers satisfying wood-fired heat, dependable performance, and a classic sauna experience. Its durable construction, upper connection opening, and soot opening support traditional installation needs while making it a strong fit for authentic sauna builds.\u003c\/p\u003e\n\u003cp\u003eThis model requires \u003cstrong\u003e66 lbs of sauna stones (2 boxes)\u003c\/strong\u003e, sold separately.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 12px;\"\u003e\n\u003csummary style=\"font-weight: bold; font-size: 16px; cursor: pointer;\"\u003eKey Features\u003c\/summary\u003e\n\u003cdiv style=\"padding-top: 12px; font-size: 15px;\"\u003e\n\u003cul style=\"padding-left: 20px; margin-top: 0; font-size: 15px;\"\u003e\n\u003cli\u003e16.5kW wood-burning sauna stove for rooms from \u003cstrong\u003e212 to 459 cu. ft.\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eExterior feed design allows firewood loading from the other side of the wall\u003c\/li\u003e\n\u003cli\u003eCan help warm two adjoining rooms\u003c\/li\u003e\n\u003cli\u003eCast-iron-framed glass door adds classic fire-view ambiance\u003c\/li\u003e\n\u003cli\u003eFloor model design\u003c\/li\u003e\n\u003cli\u003eUpper connection opening\u003c\/li\u003e\n\u003cli\u003eSoot opening for maintenance access\u003c\/li\u003e\n\u003cli\u003eDesigned, engineered, and made in Finland\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 12px;\"\u003e\n\u003csummary style=\"font-weight: bold; font-size: 16px; cursor: pointer;\"\u003eWhat's Included\u003c\/summary\u003e\n\u003cdiv style=\"padding-top: 12px; font-size: 15px;\"\u003e\n\u003cul style=\"padding-left: 20px; margin-top: 0; font-size: 15px;\"\u003e\n\u003cli\u003eHarvia M3 SL sauna stove\u003c\/li\u003e\n\u003cli\u003eStove door\u003c\/li\u003e\n\u003cli\u003eAsh box\u003c\/li\u003e\n\u003cli\u003eFire chamber extension\u003c\/li\u003e\n\u003cli\u003eInstallation and operation manual\u003c\/li\u003e\n\u003cli\u003eManufacturer warranty documentation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 12px;\"\u003e\n\u003csummary style=\"font-weight: bold; font-size: 16px; cursor: pointer;\"\u003eRequired Components\u003c\/summary\u003e\n\u003cdiv style=\"padding-top: 12px; font-size: 15px;\"\u003e\n\u003cp style=\"margin-top: 0;\"\u003eThe following item is required for proper operation and installation:\u003c\/p\u003e\n\u003cul style=\"padding-left: 20px; margin-top: 0; font-size: 15px;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eSauna Stones:\u003c\/strong\u003e 66 lbs (2 boxes), sold separately\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"margin-bottom: 0;\"\u003eBecause natural sauna stones vary in shape and size, some customers choose to purchase an additional box to help select the best fit for installation. Additional freight charges may apply for extra stones. Review the installation documentation and safety requirements before purchase to confirm compatibility with your sauna build.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 12px;\"\u003e\n\u003csummary style=\"font-weight: bold; font-size: 16px; cursor: pointer;\"\u003eSpecifications\u003c\/summary\u003e\n\u003cdiv style=\"padding-top: 12px; overflow-x: auto;\"\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; font-size: 15px;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 10px;\"\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 10px;\"\u003eM3 SL\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 10px;\"\u003e\u003cstrong\u003eSeries\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 10px;\"\u003eM Series\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 10px;\"\u003e\u003cstrong\u003ePrimary Fuel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 10px;\"\u003eWood\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 10px;\"\u003e\u003cstrong\u003eKilowatt Rating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 10px;\"\u003e16.5 KW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 10px;\"\u003e\u003cstrong\u003eRoom Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 10px;\"\u003e212 to 459 cu. ft.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 10px;\"\u003e\u003cstrong\u003eStone Requirement\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 10px;\"\u003e66 lbs (2 boxes), sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 10px;\"\u003e\u003cstrong\u003eMaximum Firewood Length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 10px;\"\u003e13.7\" (350 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 10px;\"\u003e\u003cstrong\u003eDiameter of Firewood\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 10px;\"\u003e3\" to 6\" (80 to 150 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 10px;\"\u003e\u003cstrong\u003eMinimum Room Height\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 10px;\"\u003e75.4\" (1915 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 10px;\"\u003e\u003cstrong\u003eInstallation Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 10px;\"\u003eFloor model\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 10px;\"\u003e\u003cstrong\u003eWidth\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 10px;\"\u003e15.3\" (390 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 10px;\"\u003e\u003cstrong\u003eDepth\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 10px;\"\u003e25\" (640 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 10px;\"\u003e\u003cstrong\u003eHeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 10px;\"\u003e28\" (715 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 10px;\"\u003e\u003cstrong\u003eHeater Weight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 10px;\"\u003e99 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 10px;\"\u003e\u003cstrong\u003eShipping Weight with Sauna Stones\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 10px;\"\u003e187 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 12px;\" open=\"\"\u003e\n\u003csummary style=\"font-weight: bold; font-size: 16px; cursor: pointer;\"\u003eShipping \u0026amp; Delivery\u003c\/summary\u003e\n\u003cdiv style=\"padding-top: 12px; font-size: 15px;\"\u003e\n\u003cp\u003eThis sauna heater ships free to the contiguous US via scheduled freight delivery. It arrives on a wooden pallet and is protected for transit.\u003c\/p\u003e\n\u003cp\u003eThe driver is responsible for delivery only and may provide limited site assistance. Prior to shipping, shipment details may be reviewed if there are access limitations or other site conditions that could affect delivery arrangements or create added carrier charges.\u003c\/p\u003e\n\u003cp\u003ePlease inspect your shipment upon delivery and note any visible freight damage before signing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails open=\"\" style=\"margin-bottom: 12px;\"\u003e\n\u003csummary style=\"font-weight: bold; font-size: 16px; cursor: pointer;\"\u003eWarranty\u003c\/summary\u003e\n\u003cdiv style=\"padding-top: 12px; font-size: 15px;\"\u003e\n\u003cp style=\"margin-top: 0;\"\u003eWarranty coverage may vary by product use. Review the manufacturer warranty documentation for full details and terms.\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 0;\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0587\/9840\/7738\/files\/Harvia-Warranty-11-2025_4.pdf?v=1777389555\" rel=\"noopener noreferrer\" target=\"_blank\"\u003eView Harvia Warranty\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails open=\"\" style=\"margin-bottom: 12px;\"\u003e\n\u003csummary style=\"font-weight: bold; font-size: 16px; cursor: pointer;\"\u003eManuals \u0026amp; Downloads\u003c\/summary\u003e\n\u003cdiv style=\"padding-top: 12px; font-size: 15px;\"\u003e\n\u003cul style=\"padding-left: 20px; margin-top: 0; margin-bottom: 0; font-size: 15px;\"\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0587\/9840\/7738\/files\/Harvia_M3_SL_Technical_Data_Sheet.pdf?v=1777389555\" rel=\"noopener noreferrer\" target=\"_blank\"\u003eM3 SL Technical Data Sheet\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0587\/9840\/7738\/files\/Harvia_M3_Technical_Data_Sheet.pdf?v=1777389557\" rel=\"noopener noreferrer\" target=\"_blank\"\u003eM3 Technical Data Sheet\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0587\/9840\/7738\/files\/Harvia_Sauna_Stove_IOM_3.pdf?v=1777388691\" rel=\"noopener noreferrer\" target=\"_blank\"\u003eInstallation \u0026amp; Operation Manual\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0587\/9840\/7738\/files\/Harvia_M_IOM.pdf?v=1777389556\" rel=\"noopener noreferrer\" target=\"_blank\"\u003eM Series Installation Manual\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0587\/9840\/7738\/files\/Harvia_Sauna_Stove_IOM_3_078a2112-f073-4128-b5bf-f321c5cb4315.pdf?v=1777389556\" rel=\"noopener noreferrer\" target=\"_blank\"\u003eAdditional Stove Manual PDF\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0587\/9840\/7738\/files\/Hariva-M3SL-Additional_Instructions.pdf?v=1777388686\" rel=\"noopener noreferrer\" target=\"_blank\"\u003eAdditional Instructions\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0587\/9840\/7738\/files\/Hariva-M3SL-Additional_Instructions_2d960a4e-8a6a-41ac-8a1a-dfb26b6d0a8a.pdf?v=1777389556\" rel=\"noopener noreferrer\" target=\"_blank\"\u003eAdditional Instructions PDF\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0587\/9840\/7738\/files\/Harvia_Stone_Requirements_02.27.25_5.pdf?v=1777388685\" rel=\"noopener noreferrer\" target=\"_blank\"\u003eStone Requirements\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0587\/9840\/7738\/files\/Harvia_Stone_Requirements_02.27.25_5_a4402109-fcd6-4ebd-9f97-7c0e3feeb56d.pdf?v=1777389554\" rel=\"noopener noreferrer\" target=\"_blank\"\u003eStone Requirements PDF\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails open=\"\" style=\"margin-bottom: 12px;\"\u003e\n\u003csummary style=\"font-weight: bold; font-size: 16px; cursor: pointer;\"\u003eAbout the Brand\u003c\/summary\u003e\n\u003cdiv style=\"padding-top: 12px; font-size: 15px;\"\u003e\n\u003cp\u003eHarvia is one of the world's leading sauna and spa companies, founded in Finland in 1950. Known for their craftsmanship, innovation, and deep roots in sauna culture, Harvia designs and manufactures heaters, controls, and accessories trusted by sauna enthusiasts worldwide.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e","brand":"Harvia","offers":[{"title":"Default Title","offer_id":41218068807738,"sku":"WKM3SL","price":1416.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0587\/9840\/7738\/files\/HarviaM3SL1_1__resized.png?v=1777390214","url":"https:\/\/primeregeneration.com\/products\/harvia-m-series-16-5kw-wood-sauna-stove-w-exterior-feed","provider":"Prime Regeneration","version":"1.0","type":"link"}