{"product_id":"steam-oak-kaari-300-sauna-pod","title":"Steam \u0026 Oak Kaari 300 Sauna Pod — 6 Person Thermowood with Covered Terrace","description":"\u003cp\u003eThe Kaari 300 is the largest oval we will fit a gas heater to, and the one with a \u003cstrong\u003ecovered terrace\u003c\/strong\u003e built into the shell. Three metres across rather than 2.4, with the roof carried out over a seating area at the front — so the cooling-off part of the session happens under cover, in a British garden, in October.\u003c\/p\u003e\n\n\u003cp\u003eSame construction as the rest of the range: \u003cstrong\u003e42 mm thermowood side walls\u003c\/strong\u003e, thermo-aspen benches, and a two-room layout with a proper changing room. The terrace end carries a built-in \u003cstrong\u003elog store\u003c\/strong\u003e under the curve of the shell — which is exactly where you want the wood if you are running it on a stove.\u003c\/p\u003e\n\n\u003ch3\u003eThe layout is the point\u003c\/h3\u003e\n\n\u003cp\u003eThe Kaari 300 is divided into two rooms with the heater on the dividing wall, and the terrace beyond that again.\u003c\/p\u003e\n\n\u003cp\u003eThe whole shell is around \u003cstrong\u003e19 m³\u003c\/strong\u003e. Heat all of that and you are into 12–18 kW territory and an electrical supply to match. Because it is partitioned, the heated room is about \u003cstrong\u003e9 m³\u003c\/strong\u003e — a size a normal heater handles properly, and the largest room in our oval range that an off-grid gas heater will still serve.\u003c\/p\u003e\n\n\u003cp\u003eThe changing room stays cool, so the hot room stays hot when people come and go. With six people using it in rounds, that is the difference between a sauna that holds temperature and one that never quite recovers.\u003c\/p\u003e\n\n\u003ch3\u003eWhy thermowood matters here\u003c\/h3\u003e\n\n\u003cp\u003eThe body is thermowood throughout — timber kiln-treated at 180–220°C in a low-oxygen chamber. That is not a surface coating. It changes the wood itself, closing the cells so it absorbs far less moisture, which is what stops outdoor timber cupping, twisting and splitting through a British winter. No chemical preservatives are involved, and it weathers to a stable silver-brown rather than going grey and rough.\u003c\/p\u003e\n\n\u003cp\u003eOn a building this size with a projecting terrace roof, dimensional stability is not a luxury. There is a great deal more timber here than on a compact cabin, and proportionally more to gain from wood that does not move.\u003c\/p\u003e\n\n\u003ch3\u003eSpecification\u003c\/h3\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCapacity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e6 people in the hot room\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExternal size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4050 mm L × 3000 mm W × 2480 mm H\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLayout\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHot room, changing room and covered terrace\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHeated volume\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eapprox. 9 m³ (total shell approx. 19 m³)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSide walls\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e42 mm thermowood\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRear wall\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e28 mm thermowood\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFront window\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eØ 900 mm round\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDoor\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSolid timber with three round porthole windows, 1920 × 690 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBenches\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eThermo-aspen — stays cool to the touch at temperature\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRoof\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBitumen shingles — black, red, green or brown\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBands\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eStainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eapprox. 1700 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003ch3\u003eWhat's in the box\u003c\/h3\u003e\n\u003cp\u003eEverything structural. No hidden extras to buy before you can build it:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThermowood shell panels, pre-cut and numbered\u003c\/li\u003e\n\u003cli\u003eThermo-aspen benches\u003c\/li\u003e\n\u003cli\u003ePorthole timber door and Ø 900 mm round front window\u003c\/li\u003e\n\u003cli\u003eCovered terrace structure, decking and integrated log store\u003c\/li\u003e\n\u003cli\u003eBitumen roof shingles in your chosen colour\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFloor\u003c\/strong\u003e and \u003cstrong\u003efoundation beams\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eStainless steel bands and complete fixing kit\u003c\/li\u003e\n\u003cli\u003eFascia boards and ventilation grids\u003c\/li\u003e\n\u003cli\u003eStep-by-step assembly instructions\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRun it on gas — no electrician, no cable across the garden\u003c\/h3\u003e\n\n\u003cp\u003eThis is the option almost nobody else offers, and for a lot of gardens it is the one that makes a sauna possible at all.\u003c\/p\u003e\n\n\u003cp\u003eA \u003cstrong\u003eFinSteam gas heater\u003c\/strong\u003e runs on a standard propane bottle — the same sort you would use for a patio heater or a barbecue. No armoured cable, no trench across the lawn, no electrician quote you had not budgeted for. If your garden has no power at the far end, this is how you still get a sauna there.\u003c\/p\u003e\n\n\u003cp\u003eThe partition is what makes gas viable at this size. At around 9 m³ the heated room is at the top of what a single 8.1 kW heater serves well — which is exactly why the Kaari 300 is the largest oval we offer it on. Anything bigger and we would be overselling it.\u003c\/p\u003e\n\n\u003cp\u003ePick a gas option above and \u003cstrong\u003ewe fit the flue and commission the heater on installation day\u003c\/strong\u003e. You do not need to arrange anything with anyone.\u003c\/p\u003e\n\n\u003ch4\u003eWhich gas option?\u003c\/h4\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBotnia 81\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eOur standard 8.1 kW gas heater. Everything you need to run the sauna.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAurora 81\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eThe premium version of the same 8.1 kW heater — better finish and detailing.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003cp\u003e\u003cstrong\u003eAnd then: safety pack, or without?\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cstrong\u003eWith safety pack\u003c\/strong\u003e\u003cbr\u003e\u003cem\u003erecommended on a sauna this size\u003c\/em\u003e\n\u003c\/td\u003e\n\u003ctd\u003eAdds the \u003cstrong\u003eNjord heat shield\u003c\/strong\u003e and the \u003cstrong\u003eHalo guard rail\u003c\/strong\u003e. The heat shield cuts the required clearance to combustible timber from 200 mm to 50 mm. The guard rail stops anyone brushing against the hot stones — worth having when six people are moving around a room.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWithout safety pack\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHeater and stone cage only. Suits an install where clearance is generous and the sauna is for your own use.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003cp\u003eEvery gas option includes the heater, the Orbis stone cage, and our fitting and commissioning. \u003ca href=\"\/collections\/gas-sauna-heaters\"\u003eSee the full gas heater range →\u003c\/a\u003e\u003c\/p\u003e\n\n\u003ch3\u003eOr choose electric or wood-fired above\u003c\/h3\u003e\n\n\u003cp\u003e\u003cstrong\u003eElectric\u003c\/strong\u003e — a Harvia floor-standing heater with a full stone load for soft, steady löyly, integrated controls and a 2-year warranty. At 9 m³ you want the 8 kW; check your supply can carry it. Needs a dedicated circuit installed by a qualified electrician, so budget £400–£1,200 for a garden supply on top of the heater.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWood-fired\u003c\/strong\u003e — a Harvia M-series stove. No electrics at all, a real fire, and arguably the right answer on a sauna with a terrace to sit out on. We fit the flue on installation day. If you are in a smoke control area, check the model against DEFRA's exempt appliance register first — see our \u003ca href=\"\/blogs\/news\/sauna-in-smoke-control-area\"\u003esmoke control area guide\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003e2-year warranty\u003c\/h3\u003e\n\u003cp\u003eTwo years on the structure and on the heater, whichever heat source you choose. Covers manufacturing defects and workmanship.\u003c\/p\u003e\n\n\u003ch3\u003eLead time — please ask before you order\u003c\/h3\u003e\n\u003cp\u003eLead times vary with stock and specification — anything from \u003cstrong\u003e2 to 12 weeks\u003c\/strong\u003e. Ask us before you commit and we will give you the real date for the exact build you want, not an optimistic one.\u003c\/p\u003e\n\n\u003ch3\u003eGetting it into your garden\u003c\/h3\u003e\n\u003cp\u003eThis is the biggest oval in the range at 3 m wide and around 1700 kg, so the access conversation matters. It arrives flat-packed on long pallets that need a driveway or hard standing to be set down on — a pallet truck will not cross a lawn. Individual panels carry through a standard side gate, but measure the narrowest point of the route, including gate posts and downpipes, before you order.\u003c\/p\u003e\n\n\u003cp\u003eAt this weight it wants a \u003cstrong\u003econcrete slab\u003c\/strong\u003e rather than paving on gravel, level and draining away from the timber. Our construction service starts at \u003cstrong\u003e£500\u003c\/strong\u003e, and we apply insulating paste between every panel as we build, which is the single biggest factor in whether a sauna holds its heat properly. \u003ca href=\"\/blogs\/news\/sauna-installation-uk\"\u003eFull installation guide\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cp\u003eSend us photographs of the access route before you order. We would far rather tell you it will not fit than have it turn up and go back on the lorry.\u003c\/p\u003e\n\n\u003ch3\u003eOptions\u003c\/h3\u003e\n\u003cp\u003eChoose your heater above. Roof shingles come in black, red, green or brown — tell us your preference when you order. \u003ca href=\"\/pages\/contact\"\u003eAsk us anything\u003c\/a\u003e before you commit.\u003c\/p\u003e\n\n\u003cp\u003e\u003cem\u003eImages are manufacturer renders and photographs of installed builds. The heater shown is illustrative — your heater choice is made above.\u003c\/em\u003e\u003c\/p\u003e\n","brand":"Steam \u0026 Oak","offers":[{"title":"No heater — cabin only","offer_id":62484714815875,"sku":"SO-KAARI300-SHELL","price":11700.0,"currency_code":"GBP","in_stock":true},{"title":"Harvia electric 6 kW","offer_id":62484714848643,"sku":"SO-KAARI300-E60","price":12180.0,"currency_code":"GBP","in_stock":true},{"title":"Harvia electric 8 kW","offer_id":62484714881411,"sku":"SO-KAARI300-E80","price":12200.0,"currency_code":"GBP","in_stock":true},{"title":"Wood-fired — Harvia M series","offer_id":62484714914179,"sku":"SO-KAARI300-WOOD","price":12470.0,"currency_code":"GBP","in_stock":true},{"title":"Gas — Botnia 81, no safety pack","offer_id":62484714946947,"sku":"SO-KAARI300-GB","price":13495.0,"currency_code":"GBP","in_stock":true},{"title":"Gas — Aurora 81, no safety pack","offer_id":62484714979715,"sku":"SO-KAARI300-GA","price":13695.0,"currency_code":"GBP","in_stock":true},{"title":"Gas — Botnia 81 with safety pack","offer_id":62484715012483,"sku":"SO-KAARI300-GBS","price":13795.0,"currency_code":"GBP","in_stock":true},{"title":"Gas — Aurora 81 with safety pack","offer_id":62484715045251,"sku":"SO-KAARI300-GAS","price":13995.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0988\/1187\/1619\/files\/1_9ff2ef20-bc58-4edd-8925-60b408151eab.jpg?v=1788034807","url":"https:\/\/www.steamandoak.co.uk\/products\/steam-oak-kaari-300-sauna-pod","provider":"Steam\u0026Oak","version":"1.0","type":"link"}