{"product_id":"harvia-m3-m-series-16-5kw-wood-burning-sauna-stove","title":"Harvia M3 M Series 16.5kW Wood-Burning Sauna Stove","description":"\u003c!-- Harvia M3 - 16.5kW Wood-Burning Sauna Stove - WKM3 --\u003e\u003c!-- SKU: WKM3 | M Series | 212-459 cu ft | Best-selling classic | Compact floor-standing --\u003e\u003c!-- Wood-burning - no electricity required | Graphite black + stainless steel air-flow spoiler --\u003e\u003c!-- 66 lbs stones (2 boxes AC3020 10-15cm) sold separately --\u003e\u003c!-- 5 document sections: IOM | Data Sheet | Safety Sheet | Declaration of Performance | Stone Requirements --\u003e\n\u003cstyle\u003e\n  .sl { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; color: #1a2a3a; max-width: 900px; margin: 0 auto; line-height: 1.6; }\n  .sl * { box-sizing: border-box; }\n  .sl h4 { font-weight: 700 !important; color: #0f172a !important; margin: 1.5rem 0 0.5rem; line-height: 1.3; }\n  .sl h5 { font-weight: 700 !important; color: #0f172a !important; 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color: #0f172a !important; margin: 0 0 0.5rem; }\n  .sl-doc-link { display: inline-flex; align-items: center; gap: 7px; font-size: 14px; font-weight: 500; color: #4a5568; background: #fff; border: 1px solid #d1d5db; border-radius: 5px; padding: 8px 14px; text-decoration: none; }\n  .sl-doc-link:hover { background: #e8f0fa; border-color: #bfd4ef; color: #2563a8; }\n  .sl-divider { border: none; border-top: 1px solid #e2e8f0; margin: 1.75rem 0; }\n  @media (max-width: 768px) {\n    .sl-feat-grid { grid-template-columns: 1fr 1fr; }\n    .sl-spec-grid { grid-template-columns: 1fr; gap: 1.5rem; }\n    .sl-brand1, .sl-brand2 { grid-template-columns: 1fr; gap: 1rem; padding: 1rem 0; }\n    .sl-brand2 { display: flex; flex-direction: column-reverse; }\n    .sl-brand1 h4, .sl-brand2 h4 { font-size: 18px !important; }\n  }\n  @media (max-width: 480px) {\n    .sl { padding: 0; }\n    .sl-feat-grid { grid-template-columns: 1fr; gap: 8px; }\n    .sl-feat { padding: 0.8rem 0.9rem; }\n    .sl-inc-grid { grid-template-columns: 1fr; }\n    .sl-spec-grid { gap: 1.25rem; }\n    .sl-spec-table, .sl-spec-table tbody, .sl-spec-table tr, .sl-spec-table td { display: block; width: 100%; }\n    .sl-spec-table { border: none; }\n    .sl-spec-table tr { border: 1px solid #e2e8f0; border-radius: 6px; margin-bottom: 6px; padding: 8px 12px; background: #fff !important; }\n    .sl-spec-table tr:nth-child(odd) { background: #f8fafc !important; }\n    .sl-spec-table td { border: none; padding: 1px 0; }\n    .sl-spec-table td:first-child { font-size: 10px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: #64748b; width: 100%; padding-bottom: 2px; }\n    .sl-spec-table td:last-child { font-size: 15px; font-weight: 700 !important; color: #0f172a !important; width: 100%; word-wrap: break-word; overflow-wrap: break-word; }\n    .sl-divider { margin: 1.25rem 0; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"sl\"\u003e\n\u003cdiv class=\"sl-desc\"\u003e\n\u003ch2\u003eHarvia M3 M Series 16.5kW Wood-Burning Sauna Stove\u003c\/h2\u003e\n\u003cp\u003eThe Harvia M3 is a 16.5kW wood-burning sauna stove for rooms from 212 to 459 cubic feet, in an elegant graphite black finish with a stainless steel air-flow spoiler. A best-selling classic in Harvia's lineup, the M3 is notably compact at 15.4\"W x 16.9\"D x 28.15\"H - smaller in footprint than the Legend Series stoves - making it the preferred choice for tighter sauna installations where floor space is limited. No electricity is required. The firebox is accessed from inside the sauna room. The glass door lets the warm glow of the fire complement the sauna atmosphere. Stones (66 lbs, 2 boxes of AC3020, 10-15 cm) are required for operation and sold separately.\u003c\/p\u003e\n\u003ch4\u003eBest-selling compact classic - graphite black with stainless steel spoiler\u003c\/h4\u003e\n\u003cp\u003eThe Harvia M3 has been an industry best-seller for years - a straightforward, reliable, compact wood-burning sauna stove that suits the widest range of home sauna installations. The graphite black finish with stainless steel air-flow spoiler is a distinctive look that differs from the black steel frame of the Legend Series: the M3 has a cleaner, more modern profile suited to both traditional log sauna rooms and contemporary sauna cabin builds. The stainless steel spoiler is not purely aesthetic - it directs airflow across and through the stone mass for efficient, even heat distribution. The M3's compact dimensions (15.4\"W x 16.9\"D x 28.15\"H) make it the easier stove to fit in smaller sauna rooms where the Legend 150's wider 21\" footprint would be too large or where the available floor space near the bench is tight.\u003c\/p\u003e\n\u003ch4\u003eAir-flow spoiler and efficient air circulation\u003c\/h4\u003e\n\u003cp\u003eThe stainless steel air-flow spoiler is a defining engineering feature of the M3. It is specifically designed to direct heat and air circulation through and around the stone mass, ensuring even heat distribution throughout the sauna room and bringing the stones to temperature efficiently. When water is ladled onto the stones for steam (loyly), well-circulated, evenly heated stones produce a rounder, more consistent steam response than unevenly heated stone masses. The M3's spoiler-driven circulation is a key reason for its reputation for even heat despite its compact size and relatively modest 66-lb stone load compared to larger stoves.\u003c\/p\u003e\n\u003ch4\u003eNorth American installation - 6\" flue adapter required\u003c\/h4\u003e\n\u003cp\u003eLike all Harvia wood-burning sauna stoves, the M3 uses a 115mm (4.5\") European standard flue connection. A 6\" (155mm) adapter is required for every North American chimney installation and must be purchased separately. The M3 is compatible with Harvia flue pipe components including the WZ11520, WZ11550, and WZ115100 pipe extensions and the WZ115155 adapter for North American installation. Wall clearance is 2\" (50mm) from combustible walls provided air can circulate freely in front and to one side of the stove; increase to 4\" (100mm) if the stove is installed in a recessed wall niche. A licensed or certified chimney professional is recommended for all flue installations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-hook\"\u003e16.5kW wood-burning sauna stove for rooms from 212 to 459 cubic feet. Best-selling compact classic. Graphite black with stainless steel air-flow spoiler. Glass door - see the fire from inside. No electricity required. Even heat and efficient air circulation from the stainless steel spoiler. 66 lbs stones required (2 boxes AC3020 10-15 cm, sold separately). Flue: 115mm (4.5\") - 6\" North American adapter required (sold separately). Adjustable legs. Ash box included. Optional pipe-mounted water heater compatible. 15.4\"W x 16.9\"D x 28.15\"H. 2-year warranty (consumer), 6-month (commercial). Designed, engineered, and made in Finland by Harvia.\u003c\/div\u003e\n\u003cdiv class=\"sl-badges\"\u003e\n\u003cspan class=\"sl-badge\"\u003e16.5 kW\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e212 to 459 cu ft (6-13 m³)\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eBest-selling compact classic\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eWood-burning - no electricity required\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eGraphite black finish\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eStainless steel air-flow spoiler\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eGlass door - see the fire\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eEven heat - efficient air circulation\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e66 lbs AC3020 stones required (2 boxes, 10-15 cm)\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e115mm flue - 6\" adapter required for North America\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eAdjustable legs\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eAsh box included\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eOptional pipe-mounted water heater\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e15.4\"W x 16.9\"D x 28.15\"H\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e2-year warranty (consumer)\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eMade in Finland by Harvia\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-notice-yellow\"\u003e⚠️ \u003cstrong\u003e66 lbs of AC3020 stones (2 boxes, 10-15 cm) required - not included.\u003c\/strong\u003e An additional box is recommended - each natural stone is unique in shape and size; extra stones allow selection of the best fit. A 6\" (155mm) North American flue adapter is also required and sold separately. A licensed chimney professional is recommended for all flue installations.\u003c\/div\u003e\n\u003cdiv class=\"sl-notice\"\u003eℹ️ \u003cstrong\u003eM3 vs Legend 150 - same room range, very different stoves.\u003c\/strong\u003e Both cover 212-459 cu ft. Key differences: M3 is 15.4\"W x 16.9\"D x 28.15\"H with 66 lbs of stones - compact, best-suited for space-limited sauna rooms. Legend 150 is 21\"W x 28\"D x 30\"H with 264 lbs of stones - larger stone mass for more sustained heat after the fire dies, with a cast-iron glass door and two-stage combustion air grate. Choose the M3 for compact footprint, lighter stone load, and quick setup. Choose the Legend 150 for maximum stone mass, longer sustained heat, and the cast-iron door aesthetic.\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cdiv class=\"sl-spec-grid\"\u003e\n\u003cdiv class=\"sl-spec-tables\"\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003ePerformance\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower output\u003c\/td\u003e\n\u003ctd\u003e16.5 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFuel type\u003c\/td\u003e\n\u003ctd\u003eWood - no electricity required\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRoom volume\u003c\/td\u003e\n\u003ctd\u003e212 to 459 cu ft (6-13 m³)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone capacity (maximum)\u003c\/td\u003e\n\u003ctd\u003e66 lbs (30 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone requirement\u003c\/td\u003e\n\u003ctd\u003e66 lbs - 2 boxes AC3020 (10-15 cm) - sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003ePhysical\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions (W x D x H)\u003c\/td\u003e\n\u003ctd\u003e15.4\" x 16.9\" x 28.15\" (390 x 430 x 720 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrame finish\u003c\/td\u003e\n\u003ctd\u003eGraphite black\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpoiler\u003c\/td\u003e\n\u003ctd\u003eStainless steel air-flow spoiler\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDoor\u003c\/td\u003e\n\u003ctd\u003eGlass door\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eFloor-standing with adjustable legs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAsh box\u003c\/td\u003e\n\u003ctd\u003eIncluded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eWall clearances\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandard clearance (all sides)\u003c\/td\u003e\n\u003ctd\u003e2\" (50mm) - provided air circulates in front and to one side\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRecessed wall installation\u003c\/td\u003e\n\u003ctd\u003e4\" (100mm) all sides for air circulation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSafety Distances document\u003c\/td\u003e\n\u003ctd\u003eSee Declaration of Performance for full clearance data\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-image\"\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eFlue and installation\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlue connection diameter\u003c\/td\u003e\n\u003ctd\u003e115mm (4.5\") - standard European\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNorth American adapter\u003c\/td\u003e\n\u003ctd\u003e6\" (155mm) adapter required - sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFirebox access\u003c\/td\u003e\n\u003ctd\u003eFrom inside the sauna room (standard M3 model)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLegs\u003c\/td\u003e\n\u003ctd\u003eAdjustable for levelling\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eM3 vs Legend 150 comparison\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput\u003c\/td\u003e\n\u003ctd\u003eM3: 16.5kW | Legend 150: 16kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eM3: 15.4\"W x 16.9\"D x 28.15\"H | Legend 150: 21\"W x 28\"D x 30\"H\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone load\u003c\/td\u003e\n\u003ctd\u003eM3: 66 lbs (2 boxes) | Legend 150: 264 lbs (6 boxes)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDoor\u003c\/td\u003e\n\u003ctd\u003eM3: Glass door | Legend 150: Cast-iron glass door\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAir system\u003c\/td\u003e\n\u003ctd\u003eM3: Stainless steel spoiler | Legend 150: Two-stage combustion grate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRoom range\u003c\/td\u003e\n\u003ctd\u003eBoth: 212-459 cu ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eOptional accessories (sold separately)\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eNorth American flue adapter\u003c\/td\u003e\n\u003ctd\u003eHarvia WZ115155 (6\" \/ 155mm adapter)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePipe-mounted water heater\u003c\/td\u003e\n\u003ctd\u003eHarvia WL200 or WL300\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtective shield\u003c\/td\u003e\n\u003ctd\u003eHarvia WL450 (for M1\/M2\/M3\/M3SL)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlue pipe extensions\u003c\/td\u003e\n\u003ctd\u003eHarvia WZ11520, WZ11550, WZ115100\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThrough-wall firebox variant\u003c\/td\u003e\n\u003ctd\u003eM3SL for outside-room wood loading\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cdiv class=\"sl-inc-grid\"\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eHarvia M3 wood-burning sauna stove - graphite black with stainless steel spoiler\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eStove door\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eAsh box\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eAdjustable legs\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eInstallation and operation manual\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"margin-top: 1rem; font-weight: 500; color: #64748b; font-size: 14px;\"\u003e\u003cstrong\u003eRequired (not included):\u003c\/strong\u003e 66 lbs AC3020 sauna stones - 2 boxes, 10-15 cm (an additional box recommended); 6\" North American flue adapter (Harvia WZ115155). \u003cstrong\u003eOptional accessories (sold separately):\u003c\/strong\u003e Pipe-mounted water heater (WL200 or WL300); protective shield (WL450); flue pipe components (WZ11520, WZ11550, WZ115100). A licensed chimney professional is recommended for all flue installations.\u003c\/p\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eWhy the Harvia M3 stands out\u003c\/h3\u003e\n\u003cdiv class=\"sl-feat-grid\"\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eIndustry best-selling compact classic\u003c\/div\u003e\n\u003cp\u003eThe M3 has been a consistently best-selling wood-burning sauna stove for years - a track record that reflects its combination of compact footprint, reliable performance, and accessible stone requirement (66 lbs vs 264 lbs for the Legend 150). For sauna builders, contractors, and homeowners who want a proven, well-supported wood-burning stove that fits most small sauna room configurations without requiring a large floor area, the M3 is the standard-setter in its category.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eStainless steel air-flow spoiler - even heat\u003c\/div\u003e\n\u003cp\u003eThe stainless steel spoiler directs airflow through and across the stone mass precisely to produce even heat distribution and efficient stone heating. The result is a consistent temperature throughout the sauna room and stones that heat evenly for good loyly (steam response) when water is ladled. The spoiler is a key engineering feature that distinguishes the M3's thermal performance from simpler wood stoves without active airflow direction.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eCompact footprint - 15.4\" wide\u003c\/div\u003e\n\u003cp\u003eAt 15.4\" wide and 16.9\" deep, the M3 occupies significantly less floor space than the Legend 150 (21\"W x 28\"D). In a 212-459 cu ft sauna room, bench placement and available floor space near the stove can be tight. The M3's compact profile gives sauna builders more flexibility in positioning the stove relative to the bench layout and required safety distances, and makes it the preferred choice for small barrel saunas, cabin saunas, and outdoor sauna builds where floor area is at a premium.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eGlass door - fire visible from inside\u003c\/div\u003e\n\u003cp\u003eThe M3's glass door lets the fire glow be seen from inside the sauna room throughout the session. The crackling fire visible through the glass contributes to the traditional sauna atmosphere - the visual presence of the fire is a meaningful part of the wood-burning sauna experience that an opaque metal door eliminates. The glass door also allows the bather to monitor the fire state without opening the door.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003e66 lbs stones - lighter load, easier setup\u003c\/div\u003e\n\u003cp\u003eThe M3's 66-lb stone requirement (2 boxes of AC3020) is a practical advantage for installation: considerably easier to source, handle, and load compared to the Legend 150's 264 lbs (6 boxes). For buyers fitting out a sauna for the first time, or for installations where stone delivery to the sauna site is challenging, the M3's lighter stone requirement reduces both cost and physical setup effort. An additional box beyond the minimum 2 is still recommended - natural stones vary in shape and size, and extra stones allow selection of the best-fitting pieces.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eOptional pipe-mounted water heater + protective shield\u003c\/div\u003e\n\u003cp\u003eThe M3 is compatible with Harvia pipe-mounted water heaters (WL200 and WL300, sold separately) for on-demand hot water heated by flue gas waste heat. It is also compatible with the Harvia WL450 protective shield designed specifically for the M1\/M2\/M3\/M3SL series. The through-wall loading variant (M3SL) is available for installations where loading wood from outside the sauna room is preferred. Both require the same AC3020 stones and 6\" North American flue adapter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eAbout Harvia\u003c\/h3\u003e\n\u003cdiv class=\"sl-brand1\"\u003e\n\u003cimg alt=\"Harvia M3 WKM3 16.5kW wood-burning sauna stove graphite black stainless steel air-flow spoiler glass door compact floor-standing 212-459 cu ft\" src=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-02\/harvia-m3-sauna-stove-WKM3.jpg\" class=\"sl-brand-img\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"sl-brand-tag\"\u003eMade in Finland - Wood-Burning - M Series\u003c\/span\u003e\n\u003ch4\u003eHarvia M3. 16.5kW wood-burning. Best-selling compact. 212-459 cu ft. Graphite black + stainless spoiler.\u003c\/h4\u003e\n\u003cp\u003eHarvia is a Finnish sauna and spa company established in 1950. The M3 is Harvia's best-selling compact wood-burning sauna stove - 16.5kW, 212-459 cu ft, graphite black with stainless steel air-flow spoiler, glass door, and a notably compact 15.4\"W x 16.9\"D x 28.15\"H footprint. 66 lbs of AC3020 stones (2 boxes) and a 6\" North American flue adapter are required and sold separately. Designed, engineered, and made in Finland. We are an authorized Harvia dealer.\u003c\/p\u003e\n\u003cul class=\"sl-check\"\u003e\n\u003cli\u003e\n\u003cstrong\u003e16.5kW wood-burning\u003c\/strong\u003e - 212-459 cu ft - no electricity required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBest-selling compact classic\u003c\/strong\u003e - 15.4\"W x 16.9\"D x 28.15\"H\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGraphite black\u003c\/strong\u003e with stainless steel air-flow spoiler\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e66 lbs AC3020 stones (2 boxes) required\u003c\/strong\u003e - sold separately\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e6\" North American flue adapter required\u003c\/strong\u003e - sold separately\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align: start;\" class=\"sl-brand2\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"sl-brand-tag\"\u003eM3 (WKM3) vs M3SL (WKM3SL) - firebox access\u003c\/span\u003e\n\u003ch4\u003eM3 (WKM3) vs M3SL (WKM3SL) - same stove, different firebox direction\u003c\/h4\u003e\n\u003cp\u003eThe Harvia M3 is available in two firebox access configurations. WKM3 (this listing): standard model - the firebox door faces into the sauna room and wood is loaded from inside the sauna. WKM3SL: SL model - the firebox extends through the sauna wall so wood is loaded from outside the sauna room, from an adjacent room or outdoors. Both the WKM3 and WKM3SL share the same stove body, stone capacity (66 lbs), room coverage (212-459 cu ft), dimensions (15.4\"W x 16.9\"D x 28.15\"H), graphite black finish, stainless steel spoiler, glass door, and all other specifications. The only difference is the firebox access direction. Both are compatible with the WL450 protective shield, WL200\/WL300 pipe water heaters, and Harvia flue pipe components. Both require the same 6\" North American adapter and AC3020 stones. Choose the WKM3SL if loading from outside the sauna is preferred or required by the layout.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cimg style=\"margin-bottom: 16px; float: none;\" alt=\"Harvia M3 WKM3 interior firebox versus M3SL WKM3SL exterior through-wall firebox same stove two access directions\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/harvia-sauna-stove-harvia-m3-series-16-5kw-wood-sauna-stove-wkm3-1182030573.jpg?v=1780673865\u0026amp;width=800\" class=\"sl-brand-img\"\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eManuals and Documents\u003c\/h3\u003e\n\u003cdiv class=\"sl-manual\"\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eInstallation and Operation Manual\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-02\/Harvia%20Sauna%20Stove%20IOM.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Installation and Operation Manual (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eData Sheet\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2022-02\/Hariva-M3-datasheet_0.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Data Sheet (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eSafety Sheet\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2022-02\/Harvia-Safety%20Distances.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Safety Sheet (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eDeclaration of Performance\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2022-02\/Hariva-M3-DOP.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Declaration of Performance (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eStone Requirements\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2026-02\/Harvia%20Stone%20Requirements%2002.27.25.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Stone Requirements (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eWarranty\u003c\/h3\u003e\n\u003cdiv class=\"sl-warranty\"\u003e\n\u003ch5\u003e2-year limited warranty (consumer use) | 6-month limited warranty (commercial use)\u003c\/h5\u003e\n\u003cp\u003eThe Harvia M3 is covered by a \u003cstrong\u003e2-year limited warranty from the date of purchase for consumer use\u003c\/strong\u003e and a \u003cstrong\u003e6-month limited warranty for commercial use\u003c\/strong\u003e. The warranty covers defects in manufacturing and materials under normal use conditions. The warranty does not cover damage caused by improper installation, use of incorrect stone type or size, operating without the required stone load, failure to follow the installation and operating guidelines, damage from inadequate chimney maintenance, or soot fires. A licensed or certified chimney professional is recommended for all flue installation and regular chimney sweep maintenance. Proof of purchase from an authorized Harvia dealer is required for warranty claims. We are an authorized Harvia dealer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Harvia","offers":[{"title":"Default Title","offer_id":52318922932506,"sku":"WKM3","price":1299.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/1690\/0634\/files\/harvia-sauna-stove-harvia-m3-series-16-5kw-wood-sauna-stove-wkm3-1182037373.jpg?v=1780673778","url":"https:\/\/mediriser.com\/products\/harvia-m3-m-series-16-5kw-wood-burning-sauna-stove","provider":"Mediriser","version":"1.0","type":"link"}