{"product_id":"saunalife-model-s4b-6-person-wood-fired-hot-tub-soak-series","title":"SaunaLife Model S4B 6-Person Wood-Fired Hot Tub | Soak Series","description":"\u003ch2\u003eSaunaLife Model S4B: Modern Black Wood-Fired Hot Tub for Up to 6 People\u003c\/h2\u003e\n\n\u003cp\u003eThe SaunaLife Model S4B is a 6-person wood-fired hot tub with a bold black Thermo-Spruce exterior that heats faster, burns less wood, and arrives fully assembled. Powered by a 304 stainless steel self-cleaning corrugated stove with dual heat chambers, the S4B heats 304 gallons of water from 40°F to 95°F in just 1.5 to 2 hours — up to 3× faster than traditional wood-fired tubs. No electricity required. The black thermally modified wood finish delivers a modern, premium aesthetic, and the contoured dark grey fiberglass interior comfortably seats up to 6 bathers.\u003c\/p\u003e\n\n\u003ch3\u003eThe Fastest-Heating Wood-Fired Tub on the Market\u003c\/h3\u003e\n\n\u003cp\u003eAt the heart of the S4B is its ingenious dual-chamber stove. The primary chamber burns the wood while the secondary chamber captures and recycles heat from the smoke — reducing wood consumption by up to 50% compared to traditional wood-fired hot tubs. The stove draws cooler water in through a lower channel and redistributes heated water through an upper channel, equalizing temperature throughout the tub. The air gap between the fiberglass interior and the wood exterior is also super-heated, accelerating the process from every angle.\u003c\/p\u003e\n\n\u003ch3\u003eBuilt for Gathering\u003c\/h3\u003e\n\n\u003cp\u003eThe S4B's 79-inch diameter and 304-gallon capacity give up to 6 adults plenty of room to soak comfortably. The ergonomically contoured fiberglass interior follows the natural shape of the body, and matching black Thermo-Spruce wood stairs make entry and exit easy. An insulated marine-grade vinyl cover is included to retain heat between uses and keep debris out.\u003c\/p\u003e\n\n\u003ch3\u003eNo Electricity, No Hassle\u003c\/h3\u003e\n\n\u003cp\u003eThe S4B runs entirely on firewood — no electrical hookup, no wiring, no electrician. Place it on a level outdoor surface, fill it with a garden hose, light the stove, and you're soaking in under 2 hours. A built-in drainage tap makes water changes simple.\u003c\/p\u003e\n\n\u003ch3\u003eBuilt to Last Outdoors\u003c\/h3\u003e\n\n\u003cp\u003eThe 1.65-inch thick black Thermo-Spruce exterior is thermally modified to last up to twice as long as cedar, with superior thermal resistance to retain heat. The fiberglass interior is durable, easy to clean, and designed for years of heavy use. A polished stainless steel chimney with rain cap completes the setup.\u003c\/p\u003e\n\n\u003cp\u003eThe SaunaLife Model S4B is handcrafted in Northern Europe and backed by a Limited Lifetime Warranty. Our wellness specialists are available 7 days a week to help with setup, placement, or any questions about your new hot tub.\u003c\/p\u003e\n\n\u003ch2\u003eFeatures\u003c\/h2\u003e\n\n\u003ch3\u003eHeating \u0026amp; Efficiency\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e304 Stainless Steel Dual-Chamber Stove\u003c\/strong\u003e — Self-cleaning corrugated design heats 3× faster than traditional tubs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e50% Less Wood Consumption\u003c\/strong\u003e — Secondary chamber recycles heat from smoke for maximum efficiency\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e1.5–2 Hour Heat Time\u003c\/strong\u003e — 304 gallons from 40°F to 95°F, fastest wood-fired tub available\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eConstruction \u0026amp; Materials\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBlack Thermo-Spruce Exterior (1.65\" Thick)\u003c\/strong\u003e — Lasts up to 2× longer than cedar with superior thermal resistance\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eContoured Fiberglass Interior\u003c\/strong\u003e — Dark grey ergonomic basin for comfortable 6-person soaking\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePolished Stainless Steel Chimney\u003c\/strong\u003e — Includes rain cap for weather protection\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eConvenience \u0026amp; Setup\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFully Pre-Assembled\u003c\/strong\u003e — Ships ready to use, no construction required\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eZero Electricity Required\u003c\/strong\u003e — 100% wood-fired, place anywhere outdoors\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsulated Marine-Grade Cover\u003c\/strong\u003e — Steel-reinforced foam with vinyl exterior, folds for easy removal\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eQuality \u0026amp; Warranty\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHandcrafted in Northern Europe\u003c\/strong\u003e — Designed by SaunaLife and built in Estonia\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLimited Lifetime Warranty\u003c\/strong\u003e — Long-term protection on materials and craftsmanship\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMatching Black Thermo-Spruce Stairs\u003c\/strong\u003e — Included for safe, easy tub access\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\n\u003ch3\u003eDimensions\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eExterior Diameter:\u003c\/strong\u003e 79\" (200.7 cm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eExterior Height:\u003c\/strong\u003e 37\" (94 cm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInterior Diameter:\u003c\/strong\u003e 71\" (180.3 cm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInterior Height:\u003c\/strong\u003e 33\" (83.8 cm)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCapacity\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBathers:\u003c\/strong\u003e Up to 6 persons\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWater Capacity:\u003c\/strong\u003e 304 gallons\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHeating\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeater Type:\u003c\/strong\u003e 304 stainless steel self-cleaning corrugated wood-burning stove\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeat Chambers:\u003c\/strong\u003e Dual (primary + secondary smoke heat recovery)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeat Time:\u003c\/strong\u003e 40°F to 95°F in 1.5–2 hours\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eElectricity Required:\u003c\/strong\u003e None\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eConstruction\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eExterior Material:\u003c\/strong\u003e Black Thermo-Spruce (1.65\" thick)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInterior Material:\u003c\/strong\u003e Dark grey contoured fiberglass\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Black wood\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChimney:\u003c\/strong\u003e Polished stainless steel with rain cap\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCover:\u003c\/strong\u003e Steel-reinforced foam, marine-grade vinyl exterior\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWeight \u0026amp; Shipping\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProduct Weight:\u003c\/strong\u003e 595 lbs (269.9 kg)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShipping Weight:\u003c\/strong\u003e 595 lbs (269.9 kg)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShipping Dimensions:\u003c\/strong\u003e 91\"L × 46\"W × 87\"H\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShipping Method:\u003c\/strong\u003e Palletized LTL Freight\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCertifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOrigin:\u003c\/strong\u003e Handcrafted in Northern Europe (Estonia)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e Limited Lifetime\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProp 65:\u003c\/strong\u003e No\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhat's Included\u003c\/h2\u003e\n\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eSaunaLife Model S4B wood-fired hot tub (fully assembled)\u003c\/li\u003e\n  \u003cli\u003e304 stainless steel wood-burning stove (installed)\u003c\/li\u003e\n  \u003cli\u003eMatching black Thermo-Spruce stairs\u003c\/li\u003e\n  \u003cli\u003eInsulated marine-grade vinyl cover\u003c\/li\u003e\n  \u003cli\u003ePolished stainless steel chimney\u003c\/li\u003e\n  \u003cli\u003eChimney rain cap\u003c\/li\u003e\n  \u003cli\u003eIntegrated drainage tap\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRequired for Operation (Sold Separately)\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eFirewood (hardwood recommended)\u003c\/li\u003e\n  \u003cli\u003eGarden hose or water source for filling\u003c\/li\u003e\n  \u003cli\u003eFire starter \/ kindling\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eResources\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0689\/1536\/3994\/files\/SaunaLife_S4B_Installation_Manual.pdf?v=1772201047\" target=\"_blank\"\u003eSaunaLife Model S4B Installation \u0026amp; Operation Manual (PDF)\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0689\/1536\/3994\/files\/SaunaLife_Limited_Lifetime_Warranty_12.2025.pdf?v=1772201029\" target=\"_blank\"\u003eSaunaLife Limited Lifetime Warranty (PDF)\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eQuestions?\u003c\/h2\u003e\n\u003cp\u003eOur wellness specialists are available 7 days a week to help with placement, setup, or any other questions. Call us at (888) 833-2305, email info@thesaunarepublic.com, or book a free consultation through our website. We're here Monday–Sunday, 9am–5pm EST.\u003c\/p\u003e","brand":"SaunaLife","offers":[{"title":"Default Title","offer_id":47495340556442,"sku":"SL-MODELS4B","price":6940.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1536\/3994\/files\/SaunaLife-S4B-4.jpg?v=1772204802","url":"https:\/\/thesaunarepublic.com\/products\/saunalife-model-s4b-6-person-wood-fired-hot-tub-soak-series","provider":"Sauna Republic","version":"1.0","type":"link"}