Thermory Medium Square No 43
Thermory  Medium Squares With Terrace And L-Bench | Models No 42 With Window &Amp; No 43 - Image 2
Thermory  Medium Squares With Terrace And L-Bench | Models No 42 With Window &Amp; No 43 - Image 3
Thermory  Medium Squares With Terrace And L-Bench | Models No 42 With Window &Amp; No 43 - Image 4
Thermory  Medium Squares With Terrace And L-Bench | Models No 42 With Window &Amp; No 43 - Image 5
Thermory  Medium Squares With Terrace And L-Bench | Models No 42 With Window &Amp; No 43 - Image 6
Thermory  Medium Squares With Terrace And L-Bench | Models No 42 With Window &Amp; No 43 - Image 7
Thermory  Medium Squares With Terrace And L-Bench | Models No 42 With Window &Amp; No 43 - Image 8
Thermory  Medium Squares With Terrace And L-Bench | Models No 42 With Window &Amp; No 43 - Image 9
Thermory  Medium Squares With Terrace And L-Bench | Models No 42 With Window &Amp; No 43 - Image 10
Thermory  Medium Squares With Terrace And L-Bench | Models No 42 With Window &Amp; No 43 - Image 11
Thermory  Medium Squares With Terrace And L-Bench | Models No 42 With Window &Amp; No 43 - Image 12
Thermory  Medium Squares With Terrace And L-Bench | Models No 42 With Window &Amp; No 43 - Image 13
Thermory  Medium Squares With Terrace And L-Bench | Models No 42 With Window &Amp; No 43 - Image 14
Click to enlarge
Expert help that stays with you

Whether you’re choosing one component or planning the whole room, small details can become expensive problems once installation begins. We know the products we sell and the questions to ask early, helping catch mismatched components, overlooked requirements, and installation issues while they are still easy to fix.

Our job does not end when your order ships. We stay available through installation and beyond. If something needs attention, we stay involved, work the problem, and help see it through.

We want you to feel good about choosing Sauna Marketplace long after your first session, and confident recommending us to a friend. That standard guides the advice we give, the products we sell, and the way we take care of our customers.

Sauna and heater customers also receive free shipping on sauna accessories for life.

Planning a sauna, or need help with one you purchased from us? Our founders have assembled many of the saunas we sell, visited the manufacturers, and use these products every day. New customers and existing Sauna Marketplace sauna and heater owners can Book a Ben consultation.

Specs
Made in
Wi-Fi OptionYes
Shipping MethodLTL Curbside Delivery w/ Lift Gate ServiceOur shipping partners will deliver your sauna curbside. They are not responsible for moving it into the garage or final location, so please plan to offload the crate yourself. Larger crates may require a forklift or loading dock. Please contact Sauna Marketplace to plan for a smooth delivery and installation.
People4
Exterior MaterialsThermally Modified SpruceThermal Modification of wood is a natural process using heat and steam in a vacuum to alter wood at a cellular level. When done right, it makes the wood significantly more durable, stable, and longer lasting. Thermo-Spruce is darker than raw spruce wood, closer in color and performance to Western Red Cedar.
ModelMedium Square
Choose ModelNo 42 With Window, No 43 Without Window
Attachments
Gallery
Thermory Medium Square No 43
Thermory  Medium Squares With Terrace And L-Bench | Models No 42 With Window &Amp; No 43 - Image 2
Thermory  Medium Squares With Terrace And L-Bench | Models No 42 With Window &Amp; No 43 - Image 3
Thermory  Medium Squares With Terrace And L-Bench | Models No 42 With Window &Amp; No 43 - Image 4
Thermory  Medium Squares With Terrace And L-Bench | Models No 42 With Window &Amp; No 43 - Image 5
Thermory  Medium Squares With Terrace And L-Bench | Models No 42 With Window &Amp; No 43 - Image 6
Thermory  Medium Squares With Terrace And L-Bench | Models No 42 With Window &Amp; No 43 - Image 7
Thermory  Medium Squares With Terrace And L-Bench | Models No 42 With Window &Amp; No 43 - Image 8
Thermory  Medium Squares With Terrace And L-Bench | Models No 42 With Window &Amp; No 43 - Image 9
Thermory  Medium Squares With Terrace And L-Bench | Models No 42 With Window &Amp; No 43 - Image 10
Thermory  Medium Squares With Terrace And L-Bench | Models No 42 With Window &Amp; No 43 - Image 11
Thermory  Medium Squares With Terrace And L-Bench | Models No 42 With Window &Amp; No 43 - Image 12
Thermory  Medium Squares With Terrace And L-Bench | Models No 42 With Window &Amp; No 43 - Image 13
Thermory  Medium Squares With Terrace And L-Bench | Models No 42 With Window &Amp; No 43 - Image 14
Click to enlarge
    Includes

    Thermory Medium Squares With Terrace and L-Bench | Models No 42 and No 43 includes: Pre-cut Square sauna kit in your choice of Model No 42 (panoramic rear window) or No 43 (solid spruce rear wall). Tempered glass front wall, door and handle. Porch platform, flooring, rain jacket and exterior trim. Stainless fasteners and an illustrated assembly manual. Thermally modified Nordic spruce throughout. Back bench 6.5 ft plus matching side benches. 1.6 ft deep covered porch. Ships on one pallet.

    Not included: Heater and sauna stones are not included; a 9 kW electric heater is recommended and sold separately.

    Thermory  Medium Squares With Terrace and L-Bench | Models No 42 With Window & No 43

    50 Series 60 Series Medium Square Mini Square Square

    Extend your entertainment area with the ultimate relaxation destination. Thermory Square Series “Medium” squares can bathe two to four people in heat and steam. Customize yours with an extra-wide window. Plus, all Thermory models come with a rain jacket for all-weather protection.

    Build Your Quote:

    50 Series 60 Series Medium Square Mini Square Square

    Price range: $8,008.00 through $8,619.00

    Select Heater

    We’ve tried it all! Sauna Marketplace still has the first Thermory Square sent to the US, where we’ve tried and tested every heater we can get our hands on. These are our favorite combinations with this medium-sized Square. We’ll spec the right kW for your build. Call (844) 565-1113 if you want to talk it through.

    None 2026 Harvia KIP Black with Built-in Controls (Simplest) +$1,256.17 2026 Harvia KIP Black with WiFi Enabled Fenix (Latest) Controller Package +$2,241.22 HUUM DROP with WiFi Enabled UKU Controller (Hottest) +$3,686.00 Harvia Spirit with Wi-Fi Enabled Fenix (Latest) Controller +$3,316.80 Harvia Virta Medium Square Custom Package with Wi-Fi Enabled Fenix (Latest) Controller and Stones +$3,922.50 Saunum Air Perfect Climate Equalizing Sauna Heater with WiFi Enabled AirIQ Controller Package +$5,410.00

    Share your selected heater size and add-ons. Prices and availability are confirmed when the link is opened.

    We added you to this product's waitlist and we'll send you an email when the product is available.

    Leave Waitlist

    This product is currently sold out.

    No worries! Enter your email, and we'll let you know as soon as it's back in stock.

    Zero Interest Payments:

    Buy Now, Pay Later with premium financing packages only available on Sauna Marketplace.

    Pay with HSA/FSA:

    We teamed up with FLEX to make HSA/FSA payments easier than ever.

    Thermory

    Thermory Square Series: Models No 42 & No 43

    4‑Person Outdoor Sauna • Thermally‑Modified Nordic Spruce • Built‑In Porch

    Upgrade your backyard with a European‑built, cube‑shaped sauna that combines modern glass styling with the legendary durability of thermally modified Nordic spruce.

    Choose Your View

    Model Rear Wall Atmosphere Best For
    No 42 Panoramic window (6.3 ft × 3.2 ft) Bright & scenic Lake views, gardens, rentals
    No 43 Solid spruce Private & ultra‑insulated Urban lots, harsh winters, cabins

    Highlights

    • True 4‑person layout: 6.5‑ft back bench + matching side benches
    • 25‑year rot‑resistant thermally modified spruce
    • Full‑height tempered glass front for natural light
    • 1.6‑ft deep covered porch for cool‑down and storage
    • DIY kit ships on one pallet; two people can assemble in a day

    Specifications

    Exterior (L × W × H) 6.9 ft × 6.9 ft × 7.28 ft
    Volume 191 cu ft
    Board Thickness 1.57 in
    Bench Layout Back 6.5 ft × 1.61 ft: Side 2.9 ft × 1.61 ft
    Porch Depth 1.61 ft
    Recommended Heater 9 kW electric (sold separately)

    Health Benefits

    Regular sauna sessions can improve circulation, speed muscle recovery, reduce stress hormones, and promote deeper sleep.

    What’s Included

    • Pre‑cut Square sauna kit (select No 42 or No 43)
    • Tempered glass front wall, door, and handle
    • Porch platform, flooring, rain jacket, exterior trim
    • Stainless fasteners and illustrated assembly manual
    • Heater & sauna stones not included

    Ordering & Delivery

    Inventory is limited. Reserve with a fully‑refundable payment to secure the next production slot.

    Ready to build your retreat? Select your model below and add to cart, or contact our Wisconsin‑based sauna team for expert advice.

    Expert help that stays with you

    Whether you’re choosing one component or planning the whole room, small details can become expensive problems once installation begins. We know the products we sell and the questions to ask early, helping catch mismatched components, overlooked requirements, and installation issues while they are still easy to fix.

    Our job does not end when your order ships. We stay available through installation and beyond. If something needs attention, we stay involved, work the problem, and help see it through.

    We want you to feel good about choosing Sauna Marketplace long after your first session, and confident recommending us to a friend. That standard guides the advice we give, the products we sell, and the way we take care of our customers.

    Sauna and heater customers also receive free shipping on sauna accessories for life.

    Planning a sauna, or need help with one you purchased from us? Our founders have assembled many of the saunas we sell, visited the manufacturers, and use these products every day. New customers and existing Sauna Marketplace sauna and heater owners can Book a Ben consultation.

    Specs
    Made in
    Wi-Fi OptionYes
    Shipping MethodLTL Curbside Delivery w/ Lift Gate ServiceOur shipping partners will deliver your sauna curbside. They are not responsible for moving it into the garage or final location, so please plan to offload the crate yourself. Larger crates may require a forklift or loading dock. Please contact Sauna Marketplace to plan for a smooth delivery and installation.
    People4
    Exterior MaterialsThermally Modified SpruceThermal Modification of wood is a natural process using heat and steam in a vacuum to alter wood at a cellular level. When done right, it makes the wood significantly more durable, stable, and longer lasting. Thermo-Spruce is darker than raw spruce wood, closer in color and performance to Western Red Cedar.
    ModelMedium Square
    Choose ModelNo 42 With Window, No 43 Without Window
    Attachments
    Gallery
    Thermory Medium Square No 43
    Thermory  Medium Squares With Terrace And L-Bench | Models No 42 With Window &Amp; No 43 - Image 2
    Thermory  Medium Squares With Terrace And L-Bench | Models No 42 With Window &Amp; No 43 - Image 3
    Thermory  Medium Squares With Terrace And L-Bench | Models No 42 With Window &Amp; No 43 - Image 4
    Thermory  Medium Squares With Terrace And L-Bench | Models No 42 With Window &Amp; No 43 - Image 5
    Thermory  Medium Squares With Terrace And L-Bench | Models No 42 With Window &Amp; No 43 - Image 6
    Thermory  Medium Squares With Terrace And L-Bench | Models No 42 With Window &Amp; No 43 - Image 7
    Thermory  Medium Squares With Terrace And L-Bench | Models No 42 With Window &Amp; No 43 - Image 8
    Thermory  Medium Squares With Terrace And L-Bench | Models No 42 With Window &Amp; No 43 - Image 9
    Thermory  Medium Squares With Terrace And L-Bench | Models No 42 With Window &Amp; No 43 - Image 10
    Thermory  Medium Squares With Terrace And L-Bench | Models No 42 With Window &Amp; No 43 - Image 11
    Thermory  Medium Squares With Terrace And L-Bench | Models No 42 With Window &Amp; No 43 - Image 12
    Thermory  Medium Squares With Terrace And L-Bench | Models No 42 With Window &Amp; No 43 - Image 13
    Thermory  Medium Squares With Terrace And L-Bench | Models No 42 With Window &Amp; No 43 - Image 14
    Click to enlarge
      Includes

      Thermory Medium Squares With Terrace and L-Bench | Models No 42 and No 43 includes: Pre-cut Square sauna kit in your choice of Model No 42 (panoramic rear window) or No 43 (solid spruce rear wall). Tempered glass front wall, door and handle. Porch platform, flooring, rain jacket and exterior trim. Stainless fasteners and an illustrated assembly manual. Thermally modified Nordic spruce throughout. Back bench 6.5 ft plus matching side benches. 1.6 ft deep covered porch. Ships on one pallet.

      Not included: Heater and sauna stones are not included; a 9 kW electric heater is recommended and sold separately.

      PLAN THE WHOLE SAUNA

      The room and heater still have to work as one system.

      Start with the room dimensions, then account for glass, masonry, insulation, ceiling height, required clearances, and available electrical service. That is how we move from a product that looks right to a sauna that heats evenly and comfortably.

      Compare sauna heaters

      See electric sauna heaters by output, stone mass, control style, and installation type. Size from adjusted room volume, not floor dimensions alone.

      Shop sauna heaters

      Shop complete saunas

      Explore indoor and outdoor saunas when you are planning beyond one component. Starting with the room makes heater size, controls, and accessories easier to get right.

      Explore complete saunas