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    ThermaSol Medium Solaris Sauna Cabin | Hybrid or Solar Powered Sauna

    Harvia, ThermaSol
    $70,714.00

    The cabin you’d hand your kids twenty years from now. The Solaris is Kirami’s solar-powered, off-grid electric sauna line, named to TIME’s Best Inventions of 2025. The Medium is the bigger of the two cabins in the line: a 3 kW Harvia KIP heater running off rooftop solar and a battery bank, with no electrical service to maintain. 86 by 86 inches, four to five people, 415 cu ft. Tile Oak cladding inside and out, Brushed Alder benches, solar-tinted panoramic glass, RGB LED light therapy. Built in Finland by Kirami. Twelve-week build, shipping included free.

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    Harvia KIP Electric Sauna Heater 3kw 4.5kw 6kw 8kw
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    Harvia KIP Electric Sauna Heater

    Harvia
    Price range: $954.00 through $1,258.00

    The Harvia KIP is the most affordable professional grade heater, but don’t let that fool you.  It may also be the most reliable, quickest to heat, and most adaptable.  The Harvia KIP is so popular that many designs, heater guards, and best practices are built around it.

    The Harvia KIP has an external temperature sensor for more control and accuracy, allowing you to spec the best location for your room.

    The KIP is has industrial-grade heating elements that are included in the Harvia warranty and stand up to regular sauna use.  Sizes include 4.5KW, 6KW, and 8KW with built-in controls or a wall mounted controller system with Wi-Fi-enabled Xenio for advanced scheduling and remote-control.  We’ve found the 8KW Harvia KIP outperforms most 9KW electric heaters in heat-up time and max temperature.

    All KIPs are UL‑listed, use industrial‑grade, serviceable elements, and are designed and made in Finland with a 2‑year consumer warranty. Standard size across the line is 16″W × 11″D × 24″H, with outputs from 4.5 to 8 kW to fit rooms from 100 to 425 cu ft.

    Select options This product has multiple variants. The options may be chosen on the product page
    ThermaSol Solaris outdoor pre-assembled sauna, tile oak cladding, Harvia KIP 3 kW heater with Wi-Fi, seats 2-3 people, built in Finland.
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    ThermaSol Small Solaris Sauna Cabin | Solar Off-Grid

    ThermaSol
    $66,645.00

    Most outdoor saunas require a 240V trench. This one does not. The Solaris Small is the world’s first solar-powered, off-grid electric sauna: 3 kW Harvia KIP heater running off integrated rooftop panels and an onboard battery bank. Named to TIME’s Best Inventions of 2025 list. 86 by 60 inches, two to three people, Tile Oak cladding inside and out, Brushed Alder benches, solar-tinted panoramic glass, RGB LED therapy. No chimney, no service drop, no wood pile. Built in Finland by Kirami. Twelve-week build, ships free.

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