{"product_id":"sauna-stones-grade-a-finnish-olivine-diabase-20-kg","title":"Sauna Stones - Grade A Finnish Olivine Diabase 20 kg","description":"\u003ch2\u003eDescription\u003c\/h2\u003e\n\u003cp\u003eGrade A Finnish olivine diabase is the traditional sauna stone: durable and known for the excellent soft steam it releases when water meets hot rock. The stones suit any sauna heater, wood-burning or electric, and come in two sizes, 5–10 cm and 10–15 cm, so you can match the grade your heater specifies. Where a heater calls for both, the larger stones sit at the base with the smaller grade layered on top. Each box contains approximately 20 kg, and as a natural material some colour variation between stones is entirely normal.\u003c\/p\u003e\n\n\u003ch2\u003eFeatures\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade A quality\u003c\/strong\u003e: Premium Finnish olivine diabase, noted for its durability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSoft steam\u003c\/strong\u003e: Releases an excellent, soft steam when water is ladled over the stones.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits any heater\u003c\/strong\u003e: Suitable for wood-burning and electric sauna heaters alike.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwo sizes\u003c\/strong\u003e: Choose 5–10 cm or 10–15 cm to match your heater's requirement.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorrect layering\u003c\/strong\u003e: Where both grades are needed, larger stones go at the base and smaller on top.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSimple to check\u003c\/strong\u003e: Replace stones once they have worn smaller than your closed fist.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNatural material\u003c\/strong\u003e: Some colour variation between stones is normal.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone type\u003c\/td\u003e\n\u003ctd\u003eGrade A Finnish olivine diabase\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone sizes\u003c\/td\u003e\n\u003ctd\u003e5–10 cm or 10–15 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBox weight\u003c\/td\u003e\n\u003ctd\u003eApproximately 20 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSuitable for\u003c\/td\u003e\n\u003ctd\u003eAll wood-burning and electric sauna heaters\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAppearance\u003c\/td\u003e\n\u003ctd\u003eNatural stone; some colour variation between stones is normal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\"\u003e\u003cstrong\u003eStone requirements by heater (kg)\u003c\/strong\u003e\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\"\u003e\u003cstrong\u003eWood-burning heaters\u003c\/strong\u003e\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLuosto \u0026amp; Luosto Water Tank\u003c\/td\u003e\n\u003ctd\u003e35 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInari\u003c\/td\u003e\n\u003ctd\u003e40 kg (5–10 cm) + 20 kg (10–15 cm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eKuru 14 \u0026amp; 14 Water Tank\u003c\/td\u003e\n\u003ctd\u003e35 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eKuru 20\u003c\/td\u003e\n\u003ctd\u003e40 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNarvi NC 16\u003c\/td\u003e\n\u003ctd\u003e50 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNarvi NC 20 \u0026amp; 20 Water Tank\u003c\/td\u003e\n\u003ctd\u003e60 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNarvi NC 24\u003c\/td\u003e\n\u003ctd\u003e80 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNarvi Stony\u003c\/td\u003e\n\u003ctd\u003e60 kg (5–10 cm) + 150 kg (10–15 cm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNarvi Steam Master\u003c\/td\u003e\n\u003ctd\u003e100 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNarvi 30\u003c\/td\u003e\n\u003ctd\u003e60 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNarvi 50\u003c\/td\u003e\n\u003ctd\u003e100 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNarvi Velvet\u003c\/td\u003e\n\u003ctd\u003e100 kg (5–10 cm) + 60 kg (10–15 cm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAito 16 \u0026amp; 16 Water Tank\u003c\/td\u003e\n\u003ctd\u003e50 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAito 20 \u0026amp; 20 Water Tank\u003c\/td\u003e\n\u003ctd\u003e60 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAito 24 \u0026amp; 24 Water Tank\u003c\/td\u003e\n\u003ctd\u003e80 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\"\u003e\u003cstrong\u003eElectric heaters\u003c\/strong\u003e\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNarvi Velvet Electric\u003c\/td\u003e\n\u003ctd\u003e140 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNarvi Slim\u003c\/td\u003e\n\u003ctd\u003e30 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNarvi NM\u003c\/td\u003e\n\u003ctd\u003e30 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNarvi Softy\u003c\/td\u003e\n\u003ctd\u003e120 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNarvi Style\u003c\/td\u003e\n\u003ctd\u003e60 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNarvi Steam Ready\u003c\/td\u003e\n\u003ctd\u003e80 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNarvi NC Electric\u003c\/td\u003e\n\u003ctd\u003e30 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNarvi Saana\u003c\/td\u003e\n\u003ctd\u003e80 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\"\u003e\u003cstrong\u003eCommercial sauna heaters\u003c\/strong\u003e\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNarvi Ultra\u003c\/td\u003e\n\u003ctd\u003e50 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNarvi Ultra Big\u003c\/td\u003e\n\u003ctd\u003e120 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNarvi Ultra Small\u003c\/td\u003e\n\u003ctd\u003e30 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNarvi Style Pro\u003c\/td\u003e\n\u003ctd\u003e80 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eLoading the stones\u003c\/h3\u003e\n\u003cp\u003eFor wood-burning and electric heaters, fill the stones to the rim without exceeding it, leaving the gaps as open as possible for water and air to flow through. Where both grades are required, place the larger stones at the base and the smaller grade on top. This creates a soft, even \u003cem\u003elöyly\u003c\/em\u003e. Guides and video demonstrations are available at finnmarksauna.com.\u003c\/p\u003e\n\n\u003ch3\u003eCare and replacement\u003c\/h3\u003e\n\u003cp\u003eEven high-quality diabase eventually fractures. Depending on use, replace the stones every one to two years to keep the gaps open and maintain heat capacity. Replace them sooner once they have worn smaller than your closed fist.\u003c\/p\u003e\n\n\u003ch3\u003eBrand\u003c\/h3\u003e\n\u003cp\u003eQuarried Finnish olivine diabase, supplied by Narvi.\u003c\/p\u003e\n\n\u003ch3\u003eOrdering\u003c\/h3\u003e\n\u003cp\u003eSauna stones ship as heavy boxed goods. If you are unsure which grade or quantity your heater needs, contact support@finnmarksauna.com before ordering.\u003c\/p\u003e\n\n\u003ch2\u003eDelivery\u003c\/h2\u003e\n\u003cp\u003eWe offer fast and reliable delivery to customers across the UK and beyond. For full details on shipping times and costs, please review our delivery policy.\u003c\/p\u003e\n\n\u003ch2\u003eReturns\u003c\/h2\u003e\n\u003cp\u003eWe offer hassle-free returns within 30 days of purchase, so you can shop with complete confidence. For details, see our returns policy.\u003c\/p\u003e\n\n\u003ch2\u003eWarranty \u0026amp; Quality Promise\u003c\/h2\u003e\n\u003cp\u003eWe are committed to delivering products of the highest quality, for details surrounding warranty please contact us.\u003c\/p\u003e","brand":"FINNMARK","offers":[{"title":"Default Title","offer_id":49236691320932,"sku":null,"price":26.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/5140\/4900\/files\/image_8adeac9c-5c12-45fc-bc17-9bcf4d6bdbf3.png?v=1789176555","url":"https:\/\/thewarmliving.com\/products\/sauna-stones-grade-a-finnish-olivine-diabase-20-kg","provider":"The Warm Living","version":"1.0","type":"link"}