{"product_id":"harvia-36-duo-wood-burning-stove","title":"Harvia 36 Duo Wood Burning Stove - WKPR36DUOS","description":"\u003ch2\u003eHarvia 36 Duo Wood Burning Stove - WKPR36DUOS\u003c\/h2\u003e\n\u003cp\u003eThe 36 Duo is an essential 2-in-1 wood-burning stove designed to heat two rooms, creating a traditional sauna atmosphere rich in steam while allowing you to relax in the adjoining fireplace room during breaks. With a large, stylish steel-framed glass door, this impressive heater is framed in durable stainless steel, making it suitable for large saunas up to 1,271 cubic feet. Enjoy the seamless transition between rejuvenating sauna sessions and cozy relaxation, all in one elegant setup.\u003cbr\u003e\u003c\/p\u003e\n\u003ch5\u003eWhat our Experts Think\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli data-section-id=\"wpu1v7\" data-start=\"27\" data-end=\"334\"\u003e\n\u003cstrong data-start=\"29\" data-end=\"81\"\u003eHeavy-duty high output (31 kW class performance)\u003c\/strong\u003e\u003cbr data-start=\"81\" data-end=\"84\"\u003eThe WKPR36DUOS is considered a premium \u003cstrong data-start=\"125\" data-end=\"168\" data-is-only-node=\"\"\u003elarge-capacity wood-burning sauna stove\u003c\/strong\u003e designed for sauna rooms approx. \u003cstrong data-start=\"202\" data-end=\"214\"\u003e14–36 m³\u003c\/strong\u003e, delivering fast heat-up and strong, stable temperatures even in demanding use. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"gn8vsi\" data-start=\"336\" data-end=\"613\"\u003e\n\u003cstrong data-start=\"338\" data-end=\"395\"\u003eTrue 2-in-1 sauna + fireplace experience (DUO design)\u003c\/strong\u003e\u003cbr data-start=\"395\" data-end=\"398\"\u003eExperts highlight its standout feature: it heats the sauna while also acting as a \u003cstrong data-start=\"482\" data-end=\"515\" data-is-only-node=\"\"\u003efireplace in an adjacent room\u003c\/strong\u003e, adding comfort, ambiance, and flexible living space use. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1q6w9pl\" data-start=\"615\" data-end=\"907\"\u003e\n\u003cstrong data-start=\"617\" data-end=\"682\"\u003eStrong steam quality with large stone mass (~60 kg \/ 132 lbs)\u003c\/strong\u003e\u003cbr data-start=\"682\" data-end=\"685\"\u003eThe high stone capacity ensures \u003cstrong data-start=\"719\" data-end=\"755\" data-is-only-node=\"\"\u003esoft, long-lasting löyly (steam)\u003c\/strong\u003e with smoother heat distribution—ideal for traditional sauna enthusiasts who value consistent humidity and heat. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1wt7y5k\" data-start=\"909\" data-end=\"1146\"\u003e\n\u003cstrong data-start=\"911\" data-end=\"959\"\u003eOutside loading for cleaner sauna experience\u003c\/strong\u003e\u003cbr data-start=\"959\" data-end=\"962\"\u003eWood can be loaded from outside the sauna, keeping the interior cleaner, reducing smoke exposure, and improving user comfort during operation. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1jw00j8\" data-start=\"1148\" data-end=\"1363\"\u003e\n\u003cstrong data-start=\"1150\" data-end=\"1197\"\u003eEfficient heat performance for large groups\u003c\/strong\u003e\u003cbr data-start=\"1197\" data-end=\"1200\"\u003eBuilt to maintain heat stability even with frequent door opening or multiple users, making it suitable for \u003cstrong data-start=\"1309\" data-end=\"1360\" data-is-only-node=\"\"\u003efamily saunas, cabins, and light commercial use\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli data-section-id=\"wvrm33\" data-start=\"1365\" data-end=\"1588\"\u003e\n\u003cstrong data-start=\"1367\" data-end=\"1405\"\u003eDurable Finnish steel construction\u003c\/strong\u003e\u003cbr data-start=\"1405\" data-end=\"1408\"\u003eStainless steel outer casing + reinforced firebox structure provides long service life under repeated high-temperature wood firing cycles. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"i04trt\" data-start=\"1590\" data-end=\"1812\"\u003e\n\u003cstrong data-start=\"1592\" data-end=\"1626\"\u003eComfort-focused design details\u003c\/strong\u003e\u003cbr data-start=\"1626\" data-end=\"1629\"\u003eLarge glass door creates visible flames, enhancing ambiance, while adjustable feet simplify installation and leveling in custom sauna builds. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"10s25nz\" data-start=\"1814\" data-end=\"2025\"\u003e\n\u003cstrong data-start=\"1816\" data-end=\"1856\"\u003eBest suited for premium sauna builds\u003c\/strong\u003e\u003cbr data-start=\"1856\" data-end=\"1859\"\u003eExperts recommend it for users who want a \u003cstrong data-start=\"1903\" data-end=\"1941\" data-is-only-node=\"\"\u003epowerful heater + fireplace hybrid\u003c\/strong\u003e, maximum heat capacity, and an authentic wood-fired sauna experience in one system.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003eQ\u0026amp;A\u003c\/h5\u003e\n\u003cp data-start=\"62\" data-end=\"266\"\u003e\u003cstrong data-start=\"62\" data-end=\"104\"\u003eQ: What is the Harvia 36 Duo used for?\u003c\/strong\u003e\u003cbr data-start=\"104\" data-end=\"107\"\u003eA: It is a powerful wood-burning sauna stove designed for large sauna rooms, offering both strong heating performance and a fireplace-style viewing experience.\u003c\/p\u003e\n\u003cp data-start=\"268\" data-end=\"486\"\u003e\u003cstrong data-start=\"268\" data-end=\"311\"\u003eQ: What makes the “Duo” design special?\u003c\/strong\u003e\u003cbr data-start=\"311\" data-end=\"314\"\u003eA: It has a dual-purpose structure that allows the firebox to face an adjacent room, so you can heat the sauna while also enjoying a fireplace atmosphere outside the sauna.\u003c\/p\u003e\n\u003cp data-start=\"488\" data-end=\"688\"\u003e\u003cstrong data-start=\"488\" data-end=\"530\"\u003eQ: What sauna size is it suitable for?\u003c\/strong\u003e\u003cbr data-start=\"530\" data-end=\"533\"\u003eA: It is designed for large sauna rooms approximately \u003cstrong data-start=\"587\" data-end=\"614\"\u003e14–36 m³ (494–1271 ft³)\u003c\/strong\u003e depending on insulation and layout. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"690\" data-end=\"883\"\u003e\u003cstrong data-start=\"690\" data-end=\"723\"\u003eQ: What is its heating power?\u003c\/strong\u003e\u003cbr data-start=\"723\" data-end=\"726\"\u003eA: It delivers around \u003cstrong data-start=\"748\" data-end=\"785\"\u003e31 kW of wood-burning heat output\u003c\/strong\u003e, making it suitable for fast heating of large sauna spaces. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"885\" data-end=\"1074\"\u003e\u003cstrong data-start=\"885\" data-end=\"930\"\u003eQ: What are its key performance features?\u003c\/strong\u003e\u003cbr data-start=\"930\" data-end=\"933\"\u003eA: It offers a large stone capacity for strong steam (löyly), fast heat-up time, and long-lasting heat retention for extended sauna sessions.\u003c\/p\u003e\n\u003cp data-start=\"1076\" data-end=\"1235\"\u003e\u003cstrong data-start=\"1076\" data-end=\"1114\"\u003eQ: Can it heat more than one room?\u003c\/strong\u003e\u003cbr data-start=\"1114\" data-end=\"1117\"\u003eA: Yes, the DUO design allows heat and flame visibility in an adjacent room while still effectively heating the sauna.\u003c\/p\u003e\n\u003cp data-start=\"1237\" data-end=\"1428\"\u003e\u003cstrong data-start=\"1237\" data-end=\"1275\"\u003eQ: What materials is it made from?\u003c\/strong\u003e\u003cbr data-start=\"1275\" data-end=\"1278\"\u003eA: It features a durable steel body with a stainless-steel outer casing and a large glass door for fire viewing. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"1430\" data-end=\"1609\"\u003e\u003cstrong data-start=\"1430\" data-end=\"1493\"\u003eQ: Does it require a chimney and professional installation?\u003c\/strong\u003e\u003cbr data-start=\"1493\" data-end=\"1496\"\u003eA: Yes, it requires a proper chimney system and professional installation to ensure safe and efficient operation.\u003c\/p\u003e\n\u003ch5\u003eMaintenance Tips\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli data-section-id=\"1y8prpx\" data-start=\"99\" data-end=\"243\"\u003e\n\u003cstrong data-start=\"101\" data-end=\"132\"\u003eRemove ash after every use:\u003c\/strong\u003e Keeps airflow strong and ensures efficient, clean burning performance. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1nknktl\" data-start=\"244\" data-end=\"354\"\u003e\n\u003cstrong data-start=\"246\" data-end=\"282\"\u003eUse only dry, seasoned firewood:\u003c\/strong\u003e Reduces soot buildup, improves heat output, and protects the firebox.\u003c\/li\u003e\n\u003cli data-section-id=\"h75k5k\" data-start=\"355\" data-end=\"515\"\u003e\n\u003cstrong data-start=\"357\" data-end=\"389\"\u003eChimney cleaning (critical):\u003c\/strong\u003e Inspect and clean flue regularly to prevent creosote buildup and maintain safe draft. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1jvkjxo\" data-start=\"516\" data-end=\"703\"\u003e\n\u003cstrong data-start=\"518\" data-end=\"553\"\u003eStone inspection \u0026amp; replacement:\u003c\/strong\u003e Check sauna stones yearly; replace cracked ones and keep loose stacking for proper airflow and steam quality. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"bu3d00\" data-start=\"704\" data-end=\"845\"\u003e\n\u003cstrong data-start=\"706\" data-end=\"734\"\u003eMaintain DUO air system:\u003c\/strong\u003e Ensure firebox air intake and external feeding channel stay clear for stable combustion and clean operation.\u003c\/li\u003e\n\u003cli data-section-id=\"170ig9e\" data-start=\"846\" data-end=\"952\"\u003e\n\u003cstrong data-start=\"848\" data-end=\"866\"\u003eExterior care:\u003c\/strong\u003e Wipe stainless steel body to prevent soot stains and maintain corrosion resistance.\u003c\/li\u003e\n\u003cli data-section-id=\"1805924\" data-start=\"953\" data-end=\"1062\"\u003e\n\u003cstrong data-start=\"955\" data-end=\"976\"\u003eAvoid overfiring:\u003c\/strong\u003e Do not overload wood—excess heat can damage internal structure and reduce lifespan.\u003c\/li\u003e\n\u003cli data-section-id=\"14ckq56\" data-start=\"1063\" data-end=\"1223\"\u003e\n\u003cstrong data-start=\"1065\" data-end=\"1093\"\u003eSafety clearance checks:\u003c\/strong\u003e Regularly ensure required distances from walls\/ceiling are maintained for safe operation. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"lngjk6\" data-start=\"1224\" data-end=\"1339\"\u003e\n\u003cstrong data-start=\"1226\" data-end=\"1261\"\u003eAnnual professional inspection:\u003c\/strong\u003e Check chimney connection, firebox condition, and overall structural safety\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Harvia","offers":[{"title":"Default Title","offer_id":45598569562303,"sku":"WKPR36DUOS","price":3244.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0683\/5703\/0079\/files\/Harvia_36-Duo_Heaters_2-500x500_1_4c41599d-1fd1-472f-94da-7b49d02147c2.png?v=1777379086","url":"https:\/\/backyardprovider.com\/products\/harvia-36-duo-wood-burning-stove","provider":"Your Outdoor Setup Starts Here","version":"1.0","type":"link"}