{"product_id":"cozy-heat-og-through-wall-pkg-wood-burning-sauna-stove-package-up-to-18kw","title":"Cozy Heat OG Through-Wall Pkg Wood-Burning Sauna Stove Package, Up to 18kW","description":"\u003cp\u003e\u003c!-- Cozy Heat OG Through-Wall Pkg - Contemporary Trilateral Curved Design, Through-Wall Installation, Up to 18kW --\u003e\u003c\/p\u003e\n\u003ch2\u003eCozy Heat OG Through-Wall Pkg Wood-Burning Sauna Stove Package, Up to 18kW\u003c\/h2\u003e\n\u003c!-- Through-wall | No electrical | Up to 635 cu ft | Stones included | No em dashes --\u003e\u003c!-- SKU: 129800 | Contemporary trilateral curves + through-wall firebox from outside | Handmade in Estonia --\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; 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padding-bottom: 1.25rem; border-bottom: 1px solid #e2e8f0; }\n  .sl-manual-item:last-child { margin-bottom: 0; padding-bottom: 0; border-bottom: none; }\n  .sl-manual-item h6 { font-size: 14px; font-weight: 700 !important; 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\u003cp\u003eThe Cozy Heat OG Through-Wall Sauna Stove Package combines the contemporary trilateral design of the Cozy OG with through-wall installation - the refined three-sided body with clean lines and graceful curves faces the sauna interior, while the firebox passes through the sauna wall so that wood is loaded, fire is tended, and ash is removed entirely from outside the sauna room. The sauna interior stays clean and the session undisturbed. Available in 12kW (210-423 cu ft) and 18kW (317-635 cu ft) with stone style selected at checkout, complete with stones included. The OG Through-Wall is the specific model for buyers who want the most refined version of the trilateral three-sided Cozy form combined with the operational advantages of through-wall external firebox loading.\u003c\/p\u003e\n\u003ch4\u003eThe OG design with through-wall installation\u003c\/h4\u003e\n\u003cp\u003eThe Cozy OG body is the contemporary trilateral variant - three sides with clean lines and graceful curves that refine the base Cozy's more angular geometry into a more design-forward, polished form. In the OG Through-Wall, this body faces the sauna interior: the three-sided curved form with its stone mass is the visible element in the bathing room, while the firebox opening passes through the sauna wall to an adjacent space on the exterior side. Wood loading, fire management, and ash removal all happen outside the sauna without disturbing the session. For sauna rooms designed around a contemporary aesthetic where the stove body's refined trilateral curves should be visible from inside, and where the sauna building layout supports through-wall installation, the OG Through-Wall is the model that satisfies both requirements simultaneously.\u003c\/p\u003e\n\u003ch4\u003eThrough-wall operation - clean sauna, undisturbed session\u003c\/h4\u003e\n\u003cp\u003eIn all conventional inside-loading Cozy models, fire management requires entering the hot sauna room. In the OG Through-Wall, the firebox door is on the exterior side of the sauna wall - in the changing room, a utility corridor, or outdoors. Wood is loaded from outside. The fire is tended from outside. Ash is removed from outside. No wood chips, bark, or ash on the sauna floor. No smoke entering the room when the firebox door opens. The session continues without interruption. This is the traditional Nordic and Baltic installation method that kept the bathing chamber as a clean, uninterrupted space for bathing and separated all the operational work of fire management to a dedicated exterior space. The OG Through-Wall brings this traditional functional principle together with Cozy Heat's most refined trilateral design form.\u003c\/p\u003e\n\u003ch4\u003eSame Cozy Heat engineering throughout\u003c\/h4\u003e\n\u003cp\u003eEvery technical specification of the Cozy Heat range applies: 5mm stainless steel flame cutter, three-stage combustion (primary air through the grate, secondary through mid-chamber channels, tertiary through ceiling pipes burning the flue gases as a third combustion stage), 25-40% firewood reduction, 73.9% efficiency at 12kW and 81.3% at 18kW, and German BlmSchV DIN EN 13240 Level 2 and EN 15821:2010 certification. A chimney installation is required and sold separately. The wall penetration must be correctly sized and fire-protected, and the full installation must be carried out by a qualified professional. Confirm the sauna building layout supports through-wall installation before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-hook\"\u003eWood-burning sauna stove package combining contemporary trilateral design with through-wall installation - available in 12kW (210-423 cu ft) and 18kW (317-635 cu ft), select at checkout. Includes Cozy OG Through-Wall stove and sauna stones (stone style selected at checkout). Three-sided body with clean lines and graceful curves faces sauna interior. Firebox passes through sauna wall - wood loaded, fire tended, ash removed from outside. Clean sauna interior, bathers undisturbed during session. 5mm stainless steel flame cutter. Three-stage combustion - 25-40% less firewood. EN 15821:2010 and German BlmSchV DIN EN 13240 Level 2 certified. 12kW: 73.9% efficiency. 18kW: 81.3% efficiency. No electrical required. Chimney required - sold separately. Wall penetration installation required - by qualified professional. Handmade in Estonia. 2-year warranty.\u003c\/div\u003e\n\u003cdiv class=\"sl-badges\"\u003e\n\u003cspan class=\"sl-badge\"\u003ePackage - stove + stones included\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eContemporary trilateral curves + through-wall\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e12kW (210-423 cu ft) or 18kW (317-635 cu ft)\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eRefined three-sided form inside sauna\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eFirebox from outside - clean interior\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eBathers undisturbed during session\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eThree-stage combustion\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e25-40% less firewood than comparable stoves\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e5mm stainless steel flame cutter\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eEN 15821:2010 certified\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eGerman BlmSchV DIN EN 13240 Level 2\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eChimney required - sold separately\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eHandmade in Estonia\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e2-year warranty\u003c\/span\u003e\n\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\u003eOutput selection - choose at checkout\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e12kW\u003c\/td\u003e\n\u003ctd\u003e210 to 423 cu ft | Min 265 lbs stones | 73.9% efficiency\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e18kW\u003c\/td\u003e\n\u003ctd\u003e317 to 635 cu ft | Min 353 lbs stones | 81.3% efficiency\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eElectrical required\u003c\/td\u003e\n\u003ctd\u003eNone\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChimney required\u003c\/td\u003e\n\u003ctd\u003eYes - sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone style\u003c\/td\u003e\n\u003ctd\u003eSelected at checkout\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\u003eDesign, installation and combustion\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eDesign feature\u003c\/td\u003e\n\u003ctd\u003eContemporary trilateral - clean lines with graceful curves\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstallation type\u003c\/td\u003e\n\u003ctd\u003eThrough-wall - firebox on exterior side of sauna wall\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone mass location\u003c\/td\u003e\n\u003ctd\u003eInside sauna room\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFirebox door location\u003c\/td\u003e\n\u003ctd\u003eOutside sauna room\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCombustion stages\u003c\/td\u003e\n\u003ctd\u003eThree-stage: primary, secondary, tertiary\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFirewood reduction\u003c\/td\u003e\n\u003ctd\u003e25-40% less than comparable stoves\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertification\u003c\/td\u003e\n\u003ctd\u003eEN 15821:2010 | BlmSchV DIN EN 13240 Level 2\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\u003eFirebox opening dimensions\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e12kW minimum opening width\u003c\/td\u003e\n\u003ctd\u003e10.0\" (255 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e12kW minimum floor height\u003c\/td\u003e\n\u003ctd\u003e17.3\" (440 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e18kW minimum opening width\u003c\/td\u003e\n\u003ctd\u003e12.4\" (315 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e18kW minimum floor height\u003c\/td\u003e\n\u003ctd\u003e18.5\" (470 mm)\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\u003eConstruction\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eDesign\u003c\/td\u003e\n\u003ctd\u003eContemporary trilateral - clean lines and graceful curves\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlame cutter material\u003c\/td\u003e\n\u003ctd\u003e5mm stainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBody construction\u003c\/td\u003e\n\u003ctd\u003eSteel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlue outlet position\u003c\/td\u003e\n\u003ctd\u003eTop of stove\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eHandmade in Estonia\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\u003eInstallation requirements\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eWall penetration\u003c\/td\u003e\n\u003ctd\u003eRequired - correctly sized and fire-protected\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAdjacent space required\u003c\/td\u003e\n\u003ctd\u003eYes - on exterior firebox side of sauna wall\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChimney\u003c\/td\u003e\n\u003ctd\u003eRequired - sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProfessional installation\u003c\/td\u003e\n\u003ctd\u003eRequired\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShared flue system\u003c\/td\u003e\n\u003ctd\u003eNot suitable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFirewood\u003c\/td\u003e\n\u003ctd\u003eDry seasoned hardwood required\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\u003eWarranty\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty period\u003c\/td\u003e\n\u003ctd\u003e2 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOverfiring\u003c\/td\u003e\n\u003ctd\u003eNot covered\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChimney sweeping\u003c\/td\u003e\n\u003ctd\u003eRequired regularly\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\"\u003eCozy Heat OG Through-Wall wood-burning sauna stove (12kW or 18kW - selected at checkout)\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eSauna stones - style selected at checkout (min 265 lbs \/ 12kW, min 353 lbs \/ 18kW)\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\u003eNot included (required for operation):\u003c\/strong\u003e Chimney and flue pipe installation (sold separately); wall penetration installation materials and labour (by qualified professional). \u003cstrong\u003eOptional:\u003c\/strong\u003e Additional sauna stones.\u003c\/p\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eWhy the Cozy Heat OG Through-Wall Package stands out\u003c\/h3\u003e\n\u003cdiv class=\"sl-feat-grid\"\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eRefined trilateral curves inside, firebox outside\u003c\/div\u003e\n\u003cp\u003eThe OG's contemporary three-sided body with clean lines and graceful curves faces the sauna interior - the most design-forward trilateral form in the Cozy range is the visible element in the bathing space. The firebox passes through the wall and all fire management happens outside. The specific model when both the OG design and through-wall loading are required.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eClean sauna interior, undisturbed session\u003c\/div\u003e\n\u003cp\u003eWood loaded, fire tended, and ash removed from outside without entering the sauna room. No wood, bark, ash, or smoke inside. The session is not interrupted by fire management. For sauna rooms where cleanliness and session continuity are priorities alongside design refinement, the OG Through-Wall delivers all three.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eTraditional Nordic installation, refined form\u003c\/div\u003e\n\u003cp\u003eThrough-wall firebox loading is the oldest and most traditional installation in Nordic and Baltic sauna culture - the design that kept the bathing chamber separate from fire management. The OG Through-Wall pairs this traditional functional principle with Cozy Heat's most refined trilateral design: contemporary clean lines, not utilitarian angles.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eThree-stage combustion - 25-40% less firewood\u003c\/div\u003e\n\u003cp\u003ePrimary, secondary, and tertiary air injection burns flue gases as a third combustion stage - 73.9% efficiency at 12kW, 81.3% at 18kW, up to 6x cleaner smoke gases. EN 15821:2010 and German BlmSchV DIN EN 13240 Level 2 certified. Identical combustion performance to every other Cozy Heat model.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003e5mm stainless flame cutter\u003c\/div\u003e\n\u003cp\u003eThe most thermally stressed part is fabricated from 5mm stainless steel across every Cozy Heat model - substantially heavier than industry standard. Resists warping and corrosion through years of firing cycles, extending stove service life well beyond lower-specification alternatives.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eProfessional installation required - plan first\u003c\/div\u003e\n\u003cp\u003eThe wall penetration must be correctly sized and fire-protected by a qualified professional. A chimney must be installed separately. An accessible adjacent space on the exterior firebox side is required. Confirm the building layout and engage an installer before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eAbout Cozy Heat\u003c\/h3\u003e\n\u003cdiv class=\"sl-brand1\"\u003e\n\u003cimg alt=\"Cozy Heat OG Through-Wall 12kW wood-burning sauna stove package showing contemporary trilateral design inside sauna with through-wall firebox\" src=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2026-03\/Cozy-Heat-OG-Thru-Wall-Sauna-Stove-Package-12kW-Split-Face-Stones.jpg\" class=\"sl-brand-img\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"sl-brand-tag\"\u003eHandmade in Estonia - refined trilateral, external loading\u003c\/span\u003e\n\u003ch4\u003eCozy Heat OG Through-Wall. The most refined trilateral Cozy with the traditional external firebox installation.\u003c\/h4\u003e\n\u003cp\u003eCozy Heat is an Estonian sauna stove manufacturer. The OG Through-Wall is for buyers who want two things simultaneously: the contemporary trilateral form with graceful curves visible in the sauna room, and the operationally clean through-wall installation where all fire management happens outside. The same 5mm stainless flame cutter, three-stage combustion, and German EN 15821:2010 certification as every Cozy model. The correct choice when both the OG's refined design and the Through-Wall's operational advantages matter and the building layout supports it.\u003c\/p\u003e\n\u003cul class=\"sl-check\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete package\u003c\/strong\u003e - Cozy OG Through-Wall stove and stones (style at checkout)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eContemporary trilateral inside, firebox outside\u003c\/strong\u003e - refined design, clean operation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e12kW (210-423 cu ft) or 18kW (317-635 cu ft)\u003c\/strong\u003e - select at checkout\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThree-stage combustion\u003c\/strong\u003e - 25-40% less firewood, EN 15821:2010 certified\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProfessional wall installation required\u003c\/strong\u003e - plan before purchasing\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\"\u003eOG Through-Wall vs its alternatives\u003c\/span\u003e\n\u003ch4\u003eChoosing between the OG Through-Wall and its nearest alternatives\u003c\/h4\u003e\n\u003cp\u003eCozy OG PKG (SKU 129780): contemporary trilateral design, inside-loading firebox - for buyers who want the OG's refined form but load from inside the sauna. Cozy Through-Wall PKG (SKU 129792): through-wall external loading, conventional stove body - for buyers who want external loading without the OG design. Cozy OG Through-Wall (this listing): contemporary trilateral design inside the sauna, firebox through the wall - the specific choice when both are wanted together and the building layout supports it. All three share identical technical performance, output levels, stone requirements, certifications, and warranty.\u003c\/p\u003e\n\u003cp\u003eA chimney and correctly installed wall penetration are required. Use only dry, seasoned hardwood. Do not overfire. Sweep the chimney regularly. A qualified professional must carry out the wall and chimney installation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cimg style=\"margin-bottom: 16px; float: none;\" alt=\"Cozy Heat OG Through-Wall sauna stove showing refined trilateral curved body inside sauna and through-wall firebox configuration\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/Cozy-Heat-OG-Thru-Wall-Sauna-Stove-Package-18kW-Round-Stones.jpg?v=1778927040\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\/2024-04\/Cozy%20Heat%20Manual%202024.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 Cozy Heat Manual 2024 (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eWarranty\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-04\/Cozy%20Heat%20Warranty.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 Cozy Heat Warranty (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 warranty\u003c\/h5\u003e\n\u003cp\u003eThe Cozy Heat OG Through-Wall Sauna Stove is covered by a \u003cstrong\u003e2-year limited warranty\u003c\/strong\u003e from the date of purchase. The warranty covers defects in manufacturing and materials under normal use conditions. The warranty does not cover: damage caused by overfiring; failure to use dry, seasoned firewood; failure to regularly sweep the chimney; failure to follow installation requirements including proper wall penetration and chimney installation by a qualified professional; or improper modification of the stove. Proof of purchase from an authorized Cozy Heat dealer is required. We are an authorized Cozy Heat dealer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Cozy","offers":[{"title":"12kW \/ Split-face Stone","offer_id":52229610930458,"sku":"129800","price":2850.0,"currency_code":"USD","in_stock":true},{"title":"12kW \/ Round Stone","offer_id":52229610963226,"sku":"129801","price":2950.0,"currency_code":"USD","in_stock":true},{"title":"18kW \/ Split-face Stone","offer_id":52229610995994,"sku":"129802","price":2850.0,"currency_code":"USD","in_stock":true},{"title":"18kW \/ Round Stone","offer_id":52229611028762,"sku":"129803","price":2950.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/1690\/0634\/files\/Cozy-Heat-OG-Thru-Wall-Sauna-Stove-Package-12kW-Split-Face-Stones.jpg?v=1778927033","url":"https:\/\/mediriser.com\/products\/cozy-heat-og-through-wall-pkg-wood-burning-sauna-stove-package-up-to-18kw","provider":"Mediriser","version":"1.0","type":"link"}