{"product_id":"thermasol-astra-indoor-sauna-cabin","title":"ThermaSol Astra Indoor Glass Sauna Cabin 4 Person","description":"\u003cp\u003e\u003cstrong\u003eA Sauna That Belongs in the Room\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eMost home saunas look like something you tuck away. The Astra looks like something you design a room around.\u003c\/p\u003e\n\n\u003cp\u003eA clean-lined corner layout with a panoramic clear-glass front framed in brushed Tyrol wood, it sits open and airy against any interior - no cramped wooden box, just wood, glass, and light. Step inside, settle onto the smooth thermo-aspen benches, and let the 9kW Harvia Virta build a deep, even warmth - adjustable up to 194°F - held exactly where you want it by multi-layer wood-fiber insulation. A full-spectrum LED backrest with independent controls sets the mood, and the Harvia Xenio touchpad lets you schedule sessions, set a delay start, and pre-heat from your phone through the MyHarvia app. The world stays on the other side of the glass.\u003c\/p\u003e\n\n\u003cp\u003eThe Astra is built from natural Tyrol wood and thermo-aspen, left raw and untreated on the inside the way a real sauna should be - a living material with its own grain and character, one that warms, breathes, and ages with the room rather than a sheet of laminate pretending to be wood.\u003c\/p\u003e\n\n\u003cp\u003eAnd it's meant to be built in, not merely delivered. The Astra arrives as pre-finished panels and goes together in clear phases - walls, benches, ceiling, glass - over a weekend, with two to four people, a few common tools, and no crane or contractor. It sits right on your existing level, water-resistant floor - tile, concrete, vinyl, or laminate - and the corner layout comes left- or right-handed to fit your space. The sauna you helped raise becomes part of the house in a way a wheeled-in box never is.\u003c\/p\u003e\n\n\u003cp\u003eFor the home where the sauna isn't hidden away but built in - a quiet, beautiful fixture of the life you live indoors.\u003c\/p\u003e\n\n\u003ch3\u003eWhy You'll Love It\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eIndoor corner sauna with a panoramic clear-glass front - open and airy, never cramped\u003c\/li\u003e\n  \u003cli\u003eNatural Tyrol wood interior, left raw and untreated, with smooth thermo-aspen benches and backrest - a material that ages beautifully with the room\u003c\/li\u003e\n  \u003cli\u003e9kW Harvia Virta heater (up to 194°F) with Harvia Xenio Wi-Fi control + MyHarvia app\u003c\/li\u003e\n  \u003cli\u003e12-hour delay start and weekly scheduling - pre-heat on your terms\u003c\/li\u003e\n  \u003cli\u003eFull-spectrum LED backrest with independent mood-lighting controls\u003c\/li\u003e\n  \u003cli\u003eMulti-layer wood-fiber insulation for efficient, consistent heat\u003c\/li\u003e\n  \u003cli\u003eLeft- or right-corner layout; seats 4-5\u003c\/li\u003e\n  \u003cli\u003ePre-finished panels assembled in clear phases - a weekend project for two to four people, no crane\u003c\/li\u003e\n  \u003cli\u003eSits on your existing level floor; can be disassembled and relocated\u003c\/li\u003e\n  \u003cli\u003eRequires a dedicated 240V\/40A circuit and a 4.3\" vent ducted to the outside - plan placement accordingly\u003c\/li\u003e\n  \u003cli\u003eIncluded: sauna stones, control, sensor, 2 headrests, and wood platform\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSafety \u0026amp; Good to Know\u003c\/h3\u003e\n\u003cp\u003eSauna use isn't right for everyone. Consult your physician before use, especially if you are pregnant or have a heart condition, high or low blood pressure, or any cardiovascular or other medical concern. Begin with shorter, lower-heat sessions, hydrate, avoid alcohol before use, don't exceed ~30 minutes, and supervise children. Use only clean water on the stones. Install indoors in a dry, climate-controlled space, keep the vent connected and unobstructed, and leave benches uncovered in use.\u003c\/p\u003e\n\n\u003ch3\u003eDelivery \u0026amp; Installation\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eFree shipping in the continental US; cost quoted by location\u003c\/li\u003e\n  \u003cli\u003eDelivered via flatbed trailer with on-site offloading, ~12-13 weeks; notified ~2 weeks ahead\u003c\/li\u003e\n  \u003cli\u003eAssembly is a guided, multi-phase build (walls, benches, ceiling, glass) - plan on two to four people and a weekend, using common tools (drill with cross-head and torx bits, level, ladder, rubber mallet)\u003c\/li\u003e\n  \u003cli\u003eThe tempered-glass panels require careful two-person handling during install - the edges can shatter on a hard knock, so the glass goes in last and slow\u003c\/li\u003e\n  \u003cli\u003ePlan your space: the cabin is 87\" x 87\" x 83\", but you need a minimum assembly clearance of 110\" W x 110\" D x 107\" H, a room ceiling height of at least 8', and a 2\" air gap between the unfinished cabin sides and adjacent walls\u003c\/li\u003e\n  \u003cli\u003eVentilation: the sauna requires a 4.3\" vent connected to a duct that leads outside the wall cavity, to carry warm, moist air away from the structure. This affects where the Astra can go - choose a room where that duct run is possible\u003c\/li\u003e\n  \u003cli\u003eSits directly on existing level, water-resistant flooring (concrete, ceramic tile, vinyl, or laminate)\u003c\/li\u003e\n  \u003cli\u003eElectrical (heater, control, lighting) is wired during assembly; the heater requires a dedicated 240V, 40-amp circuit installed by a licensed electrician (lighting 110V). All electrical work must be done by a licensed electrician\u003c\/li\u003e\n  \u003cli\u003eThe Astra can be disassembled and relocated by a professional if you move - though the glued ceiling frame, glass handling, and vent connection mean it's a planned job, not a quick shuffle\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eManuals\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0273\/9424\/4673\/files\/ThermaSol_Astra_Spec_Sheet.pdf?v=1774560436\" target=\"_blank\" rel=\"noopener\"\u003eDownload the ThermaSol Astra specification sheet (PDF)\u003c\/a\u003e\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable class=\"pdp-specs\"\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003cth scope=\"row\"\u003eType\u003c\/th\u003e\n\u003ctd\u003eIndoor traditional corner sauna\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth scope=\"row\"\u003eCapacity\u003c\/th\u003e\n\u003ctd\u003e4-5 people\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth scope=\"row\"\u003eSKU\u003c\/th\u003e\n\u003ctd\u003e14-ASTRADL (door left) \/ 14-ASTRADR (door right)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth scope=\"row\"\u003eCabin dimensions\u003c\/th\u003e\n\u003ctd\u003e87\" W x 87\" D x 83\" H (corner)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth scope=\"row\"\u003eInterior area\u003c\/th\u003e\n\u003ctd\u003e53 sq ft\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth scope=\"row\"\u003eMin. assembly clearance\u003c\/th\u003e\n\u003ctd\u003e110\" W x 110\" D x 107\" H\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth scope=\"row\"\u003eMin. room ceiling height\u003c\/th\u003e\n\u003ctd\u003e8'\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth scope=\"row\"\u003eAir gap required\u003c\/th\u003e\n\u003ctd\u003e2\" between unfinished cabin sides and adjacent surfaces\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth scope=\"row\"\u003eVentilation\u003c\/th\u003e\n\u003ctd\u003e4.3\" vent connected to a duct leading outside the wall cavity\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth scope=\"row\"\u003eNet weight\u003c\/th\u003e\n\u003ctd\u003e1,323 lbs (shipping 1,543 lbs)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth scope=\"row\"\u003eInterior\u003c\/th\u003e\n\u003ctd\u003eTyrol wood cladding (raw \/ untreated); thermo-aspen benches \u0026amp; backrest\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth scope=\"row\"\u003eGlass\u003c\/th\u003e\n\u003ctd\u003eTransparent tempered panoramic front\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth scope=\"row\"\u003eLayout\u003c\/th\u003e\n\u003ctd\u003eLeft- or right-corner (choose at order)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth scope=\"row\"\u003eHeater\u003c\/th\u003e\n\u003ctd\u003eHarvia Virta 14-HL9U1, 9kW, up to 194°F; 16\"w x 19\"d x 32\"h, 51 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth scope=\"row\"\u003eStones\u003c\/th\u003e\n\u003ctd\u003eOlivine Diabase dark gray, 3 boxes \/ 110 lbs (included)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth scope=\"row\"\u003eControl\u003c\/th\u003e\n\u003ctd\u003eHarvia Xenio (CX45); 12-hr delay, weekly schedule, Wi-Fi\/MyHarvia app\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth scope=\"row\"\u003eLighting\u003c\/th\u003e\n\u003ctd\u003eFull-spectrum LED backrest w\/ independent controls; 110V\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth scope=\"row\"\u003eInsulation\u003c\/th\u003e\n\u003ctd\u003eMulti-layer with wood fiber\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth scope=\"row\"\u003eElectrical\u003c\/th\u003e\n\u003ctd\u003e9kW, 240V single-phase, dedicated 40-amp breaker; lighting 110V; all electrical work by a licensed electrician\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth scope=\"row\"\u003eInstallation\u003c\/th\u003e\n\u003ctd\u003eIndoors, dry climate-controlled space; vent ducted outside; 2-4 installers\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth scope=\"row\"\u003eAssembly\u003c\/th\u003e\n\u003ctd\u003ePre-finished panels, multi-phase build; 2-4 people, common tools, ~a weekend\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth scope=\"row\"\u003eFlooring\u003c\/th\u003e\n\u003ctd\u003eExisting level, water-resistant floor (concrete\/tile\/vinyl\/laminate)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth scope=\"row\"\u003eMobility\u003c\/th\u003e\n\u003ctd\u003eCan be disassembled \/ relocated (planned reinstall - glued ceiling frame, glass, vent)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth scope=\"row\"\u003eIncluded accessories\u003c\/th\u003e\n\u003ctd\u003eStones, control, temp sensor, 2 headrests, wood platform, MyHarvia app\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth scope=\"row\"\u003eDelivery\u003c\/th\u003e\n\u003ctd\u003eFlatbed w\/ on-site offload, ~12-13 weeks\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eFrequently asked questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eIs the Astra an indoor or outdoor sauna?\u003c\/strong\u003e\u003cbr\u003e\nIndoor. It's designed to sit inside a dry, climate-controlled space on an existing level floor, with a panoramic glass corner front that blends into modern interiors.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow many people does it seat?\u003c\/strong\u003e\u003cbr\u003e\nFour to five, in an 87\" x 87\" corner layout (53 sq ft interior).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow hard is it to assemble?\u003c\/strong\u003e\u003cbr\u003e\nIt's a guided, multi-phase build rather than a flat-pack chair. Plan on two to four people over a weekend, with common tools - a drill, level, ladder, and rubber mallet. The panels are pre-finished and the joints are pre-drilled, so it goes together in a clear sequence, but the tempered glass goes in last and needs careful two-person handling.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes it need ventilation?\u003c\/strong\u003e\u003cbr\u003e\nYes. The Astra requires a 4.3\" vent connected to a duct that runs outside the wall cavity, which carries warm, moist air away from the structure and protects it long-term. Choose a room where that duct run is possible - it's worth confirming before you order.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow much room do I actually need?\u003c\/strong\u003e\u003cbr\u003e\nMore than the cabin footprint. Plan for a minimum assembly clearance of 110\" x 110\" x 107\" tall, a room ceiling height of at least 8', and a required 2\" air gap between the unfinished cabin sides and adjacent walls.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat electrical setup does it need?\u003c\/strong\u003e\u003cbr\u003e\nThe 9kW Harvia Virta heater needs a dedicated 240V, 40-amp circuit; the lighting runs on 110V. All electrical work - heater, controller, and LED wiring - must be completed by a licensed electrician, and is done during assembly.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes it need a special floor?\u003c\/strong\u003e\u003cbr\u003e\nIt sits directly on existing level, water-resistant flooring - concrete, ceramic tile, vinyl, or laminate. If your floor doesn't qualify, an alternative base may be needed.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I control it from my phone?\u003c\/strong\u003e\u003cbr\u003e\nYes - the Harvia Xenio control offers a 12-hour delay start, weekly scheduling, and Wi-Fi control through the MyHarvia app, so it's hot when you want it.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat's included?\u003c\/strong\u003e\u003cbr\u003e\nSauna stones, the control and temperature sensor, two headrests, a wood platform, and MyHarvia app access. Optional accessories (pail and ladle, cushions, aromatherapy, decorative stones) are available.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I move it later?\u003c\/strong\u003e\u003cbr\u003e\nYes - it can be disassembled and relocated. Because of the glued ceiling frame, the glass handling, and the vent connection, treat a move as a planned reinstall rather than a quick shuffle.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Is the Astra an indoor or outdoor sauna?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Indoor. 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