{"product_id":"cozy-heat-og-thru-wall-sauna-stove","title":"Harvia  Cozy Heat OG Thru-Wall Sauna Stove - 4745010348082","description":"\u003ch2\u003eHarvia  Cozy Heat OG Thru-Wall Sauna Stove - 4745010348082\u003c\/h2\u003e\n\u003cp\u003eCozy Heat has elevated the time-honored tradition of building  with the hand-crafted OG-TW, made in Estonia, where sauna bathing is a national custom. The innovative \"Through-the-Wall\" design allows you to load firewood from outside the sauna, keeping the interior clean and comfortable. This stove provides mild, long-lasting heat, ideal for pouring water over hot stones to create the perfect steam for an authentic sauna experience. Built for exceptional durability, the flame cutter is crafted from sturdy 5mm-thick stainless steel, ensuring lasting performance. The elegant, trilateral design with sleek lines and a contemporary finish adds sophistication to any sauna, creating a luxurious ambiance. Experience the ultimate in comfort and style with the  OG-TW!\u003c\/p\u003e\n\u003ch5\u003eWhat our Experts Think\u003c\/h5\u003e\n\u003csection class=\"text-token-text-primary w-full focus:outline-none [--shadow-height:45px] has-data-writing-block:pointer-events-none has-data-writing-block:-mt-(--shadow-height) has-data-writing-block:pt-(--shadow-height) [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto [content-visibility:auto] supports-[content-visibility:auto]:[contain-intrinsic-size:auto_100lvh] R6Vx5W_threadScrollVars scroll-mb-[calc(var(--scroll-root-safe-area-inset-bottom,0px)+var(--thread-response-height))] scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" dir=\"auto\" data-turn-id=\"request-WEB:a76567be-9a19-4f37-bbe1-050f157d3815-4\" data-testid=\"conversation-turn-10\" data-scroll-anchor=\"false\" data-turn=\"assistant\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm\/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg\/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)\"\u003e\n\u003cdiv class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col gap-4 grow\"\u003e\n\u003cdiv data-message-author-role=\"assistant\" data-message-id=\"866dd4af-d410-4f68-85bb-e4dd275437d1\" data-turn-start-message=\"true\" dir=\"auto\" data-message-model-slug=\"gpt-5-3-mini\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+\u0026amp;]:mt-1\" tabindex=\"0\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert w-full wrap-break-word light markdown-new-styling\"\u003e\n\u003cul data-start=\"27\" data-end=\"912\"\u003e\n\u003cli data-section-id=\"1batlmj\" data-start=\"27\" data-end=\"140\"\u003ePremium \u003cstrong data-start=\"37\" data-end=\"90\"\u003eEstonian-engineered through-wall wood sauna stove\u003c\/strong\u003e designed for authentic Nordic sauna performance\u003c\/li\u003e\n\u003cli data-section-id=\"1590ilr\" data-start=\"141\" data-end=\"257\"\u003eUnique \u003cstrong data-start=\"150\" data-end=\"177\"\u003eexternal loading system\u003c\/strong\u003e lets you feed firewood from outside the sauna for improved comfort and safety\u003c\/li\u003e\n\u003cli data-section-id=\"ayul8q\" data-start=\"258\" data-end=\"373\"\u003eProduces \u003cstrong data-start=\"269\" data-end=\"298\"\u003emild, steady radiant heat\u003c\/strong\u003e ideal for long, relaxing sauna sessions without harsh temperature spikes\u003c\/li\u003e\n\u003cli data-section-id=\"1mu7842\" data-start=\"374\" data-end=\"478\"\u003eOptimized for \u003cstrong data-start=\"390\" data-end=\"427\"\u003ehigh-quality löyly (steam bursts)\u003c\/strong\u003e when water is poured over properly heated stones\u003c\/li\u003e\n\u003cli data-section-id=\"kgx71g\" data-start=\"479\" data-end=\"582\"\u003eHeavy-duty steel construction with reinforced firebox for \u003cstrong data-start=\"539\" data-end=\"580\"\u003ehigh durability and long service life\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"b7n2zs\" data-start=\"583\" data-end=\"699\"\u003eAdvanced airflow design supports \u003cstrong data-start=\"618\" data-end=\"669\"\u003ecleaner combustion and improved fuel efficiency\u003c\/strong\u003e compared to standard stoves\u003c\/li\u003e\n\u003cli data-section-id=\"10ifyqe\" data-start=\"700\" data-end=\"811\"\u003eEngineered for \u003cstrong data-start=\"717\" data-end=\"745\"\u003estable heat distribution\u003c\/strong\u003e in medium to large sauna cabins (depending on kW configuration)\u003c\/li\u003e\n\u003cli data-section-id=\"d1u1d\" data-start=\"812\" data-end=\"912\"\u003eBuilt for users seeking a \u003cstrong data-start=\"840\" data-end=\"912\"\u003etrue traditional wood-fired sauna experience with modern convenience\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"mt-3 w-full empty:hidden\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003ch5\u003eQ\u0026amp;A\u003c\/h5\u003e\n\u003csection class=\"text-token-text-primary w-full focus:outline-none [--shadow-height:45px] has-data-writing-block:pointer-events-none has-data-writing-block:-mt-(--shadow-height) has-data-writing-block:pt-(--shadow-height) [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto [content-visibility:auto] supports-[content-visibility:auto]:[contain-intrinsic-size:auto_100lvh] R6Vx5W_threadScrollVars scroll-mb-[calc(var(--scroll-root-safe-area-inset-bottom,0px)+var(--thread-response-height))] scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" dir=\"auto\" data-turn-id=\"request-WEB:1dd7d47d-7629-4d9a-a6e3-978e5678da81-3\" data-testid=\"conversation-turn-8\" data-scroll-anchor=\"false\" data-turn=\"assistant\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm\/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg\/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)\"\u003e\n\u003cdiv class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col gap-4 grow\"\u003e\n\u003cdiv data-message-author-role=\"assistant\" data-message-id=\"805bb7b1-9eb8-4480-bcdf-e42dcb77cd12\" data-turn-start-message=\"true\" dir=\"auto\" data-message-model-slug=\"gpt-5-3-mini\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+\u0026amp;]:mt-1\" tabindex=\"0\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert w-full wrap-break-word light markdown-new-styling\"\u003e\n\u003cp data-start=\"68\" data-end=\"303\"\u003e\u003cstrong data-start=\"68\" data-end=\"138\"\u003eQ: What is the Harvia Cozy Heat OG Thru-Wall Sauna Stove used for?\u003c\/strong\u003e\u003cbr data-start=\"138\" data-end=\"141\"\u003eA: It is a wood-burning sauna stove designed to efficiently heat sauna rooms while allowing firewood loading from outside the sauna through a wall-mounted design.\u003c\/p\u003e\n\u003cp data-start=\"305\" data-end=\"503\"\u003e\u003cstrong data-start=\"305\" data-end=\"363\"\u003eQ: What is the main advantage of the thru-wall design?\u003c\/strong\u003e\u003cbr data-start=\"363\" data-end=\"366\"\u003eA: It improves convenience and cleanliness by letting you feed wood from outside the sauna, reducing heat loss and indoor smoke exposure.\u003c\/p\u003e\n\u003cp data-start=\"505\" data-end=\"675\"\u003e\u003cstrong data-start=\"505\" data-end=\"547\"\u003eQ: What sauna size is it suitable for?\u003c\/strong\u003e\u003cbr data-start=\"547\" data-end=\"550\"\u003eA: It is typically suited for small to medium sauna rooms (around 210–635 cu.ft., depending on configuration and insulation).\u003c\/p\u003e\n\u003cp data-start=\"677\" data-end=\"849\"\u003e\u003cstrong data-start=\"677\" data-end=\"711\"\u003eQ: Is this a wood-fired stove?\u003c\/strong\u003e\u003cbr data-start=\"711\" data-end=\"714\"\u003eA: Yes, it is a traditional wood-burning heater that produces strong, natural sauna heat and rich steam when water is poured on stones.\u003c\/p\u003e\n\u003cp data-start=\"851\" data-end=\"1058\"\u003e\u003cstrong data-start=\"851\" data-end=\"895\"\u003eQ: What makes its performance efficient?\u003c\/strong\u003e\u003cbr data-start=\"895\" data-end=\"898\"\u003eA: It features optimized combustion, durable 5mm steel components, and fuel-efficient design for long-lasting heat output. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"1060\" data-end=\"1219\"\u003e\u003cstrong data-start=\"1060\" data-end=\"1097\"\u003eQ: What material is it made from?\u003c\/strong\u003e\u003cbr data-start=\"1097\" data-end=\"1100\"\u003eA: Heavy-duty steel construction with reinforced firebox areas designed for high heat resistance and long service life.\u003c\/p\u003e\n\u003cp data-start=\"1221\" data-end=\"1399\"\u003e\u003cstrong data-start=\"1221\" data-end=\"1270\"\u003eQ: Does it require professional installation?\u003c\/strong\u003e\u003cbr data-start=\"1270\" data-end=\"1273\"\u003eA: Yes, professional installation is recommended for safe chimney routing, wall penetration setup, and ventilation compliance.\u003c\/p\u003e\n\u003cp data-start=\"1401\" data-end=\"1640\"\u003e\u003cstrong data-start=\"1401\" data-end=\"1430\"\u003eQ: Why choose this stove?\u003c\/strong\u003e\u003cbr data-start=\"1430\" data-end=\"1433\"\u003eA: It combines authentic wood-fired sauna experience, space-saving thru-wall loading, and durable engineering from \u003cspan class=\"hover:entity-accent entity-underline inline cursor-pointer align-baseline\"\u003e\u003cspan class=\"whitespace-normal\"\u003eHarvia\u003c\/span\u003e\u003c\/span\u003e, a globally trusted sauna brand known for reliability.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"mt-3 w-full empty:hidden\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003ch5\u003eMaintenance Tips\u003c\/h5\u003e\n\u003csection class=\"text-token-text-primary w-full focus:outline-none [--shadow-height:45px] has-data-writing-block:pointer-events-none has-data-writing-block:-mt-(--shadow-height) has-data-writing-block:pt-(--shadow-height) [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto [content-visibility:auto] supports-[content-visibility:auto]:[contain-intrinsic-size:auto_100lvh] R6Vx5W_threadScrollVars scroll-mb-[calc(var(--scroll-root-safe-area-inset-bottom,0px)+var(--thread-response-height))] scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" dir=\"auto\" data-turn-id=\"request-WEB:f7051717-371b-4d73-b829-ae53c5f2d208-52\" data-testid=\"conversation-turn-8\" data-scroll-anchor=\"false\" data-turn=\"assistant\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm\/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg\/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)\"\u003e\n\u003cdiv class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col gap-4 grow\"\u003e\n\u003cdiv data-message-author-role=\"assistant\" data-message-id=\"371b2799-95fc-4f92-a262-2fedf8f8a760\" data-turn-start-message=\"true\" dir=\"auto\" data-message-model-slug=\"gpt-5-3-mini\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+\u0026amp;]:mt-1\" tabindex=\"0\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert w-full wrap-break-word light markdown-new-styling\"\u003e\n\u003cul data-start=\"66\" data-end=\"813\"\u003e\n\u003cli data-section-id=\"azno3x\" data-start=\"66\" data-end=\"152\"\u003eEmpty ash tray after each use to maintain strong airflow and efficient combustion.\u003c\/li\u003e\n\u003cli data-section-id=\"ol6b9x\" data-start=\"153\" data-end=\"232\"\u003eClean firebox and remove soot buildup regularly for safer, cleaner burning.\u003c\/li\u003e\n\u003cli data-section-id=\"fb1pe3\" data-start=\"233\" data-end=\"308\"\u003eInspect thru-wall loading chamber and door seals for heat wear or gaps.\u003c\/li\u003e\n\u003cli data-section-id=\"197vy19\" data-start=\"309\" data-end=\"393\"\u003eUse only dry, seasoned firewood to reduce creosote and improve stove efficiency.\u003c\/li\u003e\n\u003cli data-section-id=\"7f04ht\" data-start=\"394\" data-end=\"499\"\u003eRe-stack sauna stones periodically; replace cracked or crumbling stones for consistent steam quality.\u003c\/li\u003e\n\u003cli data-section-id=\"1o9dvfh\" data-start=\"500\" data-end=\"572\"\u003eEnsure stone placement allows proper airflow to prevent overheating.\u003c\/li\u003e\n\u003cli data-section-id=\"hif7yn\" data-start=\"573\" data-end=\"643\"\u003eKeep external loading hatch and ventilation paths clear of debris.\u003c\/li\u003e\n\u003cli data-section-id=\"o3qhi6\" data-start=\"644\" data-end=\"721\"\u003eWipe exterior surfaces after cooling to prevent rust and maintain finish.\u003c\/li\u003e\n\u003cli data-section-id=\"x9gi9o\" data-start=\"722\" data-end=\"813\"\u003eSchedule annual chimney and flue cleaning to ensure safe draft and long-term performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"mt-3 w-full empty:hidden\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e","brand":"Harvia","offers":[{"title":"Default Title","offer_id":45598864834751,"sku":"4745010348082","price":1885.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0683\/5703\/0079\/files\/cozy-12og-tw-sauna-stove-main.png?v=1777388038","url":"https:\/\/backyardprovider.com\/products\/cozy-heat-og-thru-wall-sauna-stove","provider":"Your Outdoor Setup Starts Here","version":"1.0","type":"link"}