#40: panoramic rear window
Choose it when the view behind the sauna deserves a seat, too. Glass at both ends makes the room feel open. Our original 360 photos show #40. The 3D model shows either version.
The only L-Bench Sauna Kit We Sell
Ideal for conversations, or two people to lay down at the same time. The L-shaped upper benches let you face each other, with lower footrests to keep your feet off the floor. Two porch seats give you a place to cool down between rounds.
You get Thermory wood throughout: thermally modified Nordic spruce for the shell and Thermo-Aspen for the benches. Thermory is the global leader in thermal modification. Heat and steam improve the wood’s stability and decay resistance without added chemicals.
We visited Thermory in Estonia and saw firsthand how selective they are about the wood that goes into their saunas. That care matters in a sauna you plan to use for years.
One layout. Two views.
Choose your rear wall.
Both models have the glass front, porch and L-shaped benches. The difference is the rear wall.
#41: solid wood rear wall
Choose it when the sauna backs onto a fence, neighboring yard or a view you would rather leave outside. You keep the glass front and the same seating, with privacy at the back.
A proper bench beats a headcount.
Thermory lists seating for up to six. The rear upper bench is 6½ feet long, and the side bench turns the corner. You can sit facing each other instead of lining up shoulder to shoulder. Use the 3D interior view to look at the layout before choosing.
| Sauna footprint, including porch | 82.7″ wide × 98.8″ long |
|---|---|
| Height, including base beams | About 87.9″ |
| Rear upper bench | 78″ long × 19.5″ deep |
| Side upper bench | 51.2″ long × 19.3″ deep |
| Lower footrests | 60.5″ rear and 43.7″ side; 8.1″ deep |
| Floor grids | Two removable grids, 44.6″ wide × 43.3″ deep together |
| Interior bench wood | Thermo-Aspen |
| Shell | Thermally modified Nordic spruce; made in Estonia |
The measured photo in the gallery is our 2024 Square, whose floor grid is 48″ wide. Thermory’s current drawing shows 44.6″.
Use the drawing linked below to lay out the base beams. Leave room for the door swing, assembly, maintenance and the clearances required by your site.
Know what you are buying
The sauna is the start of the package.
Included with the sauna
- Thermo-Spruce shell, base beams and assembly hardware
- Glass front and hinged door; rear window on #40 or wood rear wall on #41
- Upper benches, lower footrests and backrests
- Front porch seats and floor grids
- Roof rain jacket and exhaust vent
Choose with your order
- HUUM HIVE Mini or HUUM CORE heater package
- Heater controls and required accessories, as listed in the selected package
- Optional under-bench lighting
The sauna price does not include a heater. Your selections update the total in the buying section.
Plan at your site
- A firm, level base that supports all four base beams
- Freight access and a confirmed unloading plan
- Assembly help and space to work
- Electrical supply, wiring and installation by your electrician
The heater choice changes the session.
The HIVE Mini’s open stone basket is a good fit if you like pouring water over the stones and enjoying the heat from the upper bench. The CORE is a compact heater clad in Thermo-Aspen panels, which give it a finished look and help reduce accidental contact with hot metal. Both packages come with Wi-Fi UKU control and are available above.
We favor a floor-standing heater in the Square. We tried a wall-mounted heater in our own: the curved wall forced it higher than we wanted. The 3D model shows either package in the front corner beside the door. The sauna and chosen heater manuals guide the final installation.
The first Square sent to North America
This is the one we learned on.
Ben Frizzell still owns the first Thermory Square sent to North America. He built it on camera near Bend, Oregon. It has been our test bench for heaters, ventilation and bench layouts ever since.
Watch the build before your crate arrives. You will see how the base, shell, glass and benches come together. Plan a full day to a weekend with a helper, plus electrical work.
The video shows an earlier kit with some preassembled panels. Current kits use individual staves. Follow the current manual for your kit’s assembly sequence.
A few things to get right before build day.
Start level.
The base sets the door, glass and benches up to fit. Check the support positions and diagonal measurements before building upward.
Plan the unload.
This is a large freight crate. Do not count on a liftgate. Arrange suitable equipment or a hand-unloading plan with the carrier before delivery day. Your heater equipment may arrive separately.
Give the wood some care.
Thermal modification improves stability and decay resistance. It does not freeze the color in place. Exterior wood weathers toward silver; use the care guide if you want to maintain the brown tone. Keep the roof cover in good condition and let the sauna dry after use.
Questions to answer before you order.
What’s the difference between #40 and #41?
The rear wall. #40 has a panoramic rear window; #41 has solid wood at the back. Both have the same glass front, porch, sauna dimensions and L-shaped benches. Choose #40 for a view behind the sauna, or #41 for privacy against a fence or neighboring yard.
How many people fit, and can two people lie down?
Thermory lists seating for up to six. The L-shaped layout is ideal for conversations or two people stretching out together. The rear upper bench is 78 inches long. Look at the bench dimensions and the 3D interior with the people you’ll use it with; seated capacity and room to stretch out are different things.
Which heater do you recommend?
Choose the HUUM HIVE Mini package for its open stone basket, or the HUUM CORE package for a compact heater with Thermo-Aspen cladding. Both include Wi-Fi UKU control and the equipment listed in the selector. We recommend floor-standing placement in the Square after trying a wall-mounted heater in our own. Choose a package to see it inside the 3D model.
Does it come with a heater, controls and stones?
The sauna price is for the sauna kit. A heater is separate. The heater packages above include controls, stones and the accessories named in each option. Select the sauna and heater to see the package total. Foundation work, assembly, electrical installation and freight are separate project costs.
Can I add lighting, and what does it light up?
Yes. Lighting is optional, and the ProSaunas kits are in the buying section. Under the benches, the light washes across the wood and floor without shining directly into your eyes. Plan cable routes and a suitable place for the power supply during assembly. Your electrician should follow the selected lighting kit’s instructions.
What dimensions should I use to build the foundation?
The sauna footprint, including the porch, is 82.7 inches wide by 98.8 inches long. Build a firm, level base with support under all four base beams. The installation manual shows their positions. Leave working space for assembly, the door swing and maintenance. A patio or deck needs to support the installed sauna and people using it.
Can I assemble it myself? What does the electrician do?
A capable DIYer can assemble the kit with a helper. Watch our complete build video, then follow the current installation manual: today’s kits use individual staves, while the video shows an earlier version. Your electrician installs the heater supply, controls and sensor to the selected heater’s instructions and local requirements. Check sensor placement before the first heat.
Where does it ship from, and how is it unloaded?
The sauna ships by freight from a U.S. warehouse. We confirm the shipping plan for your order. This is a large crate: arrange a forklift or an agreed hand-unloading plan before dispatch. Do not assume liftgate unloading is included. Heater equipment can arrive separately. Tell us about driveway access and unloading arrangements before the shipment is released.
Can delivery be scheduled for a particular day?
We can plan dispatch around your target timing. The carrier schedules the final delivery appointment, so an exact arrival day cannot be guaranteed. Wait for that appointment before booking a crew around delivery. Agree the unloading method with the carrier in advance.
Can you hold delivery until my site is ready?
Tell us your target date before the order is released to ship. We’ll work through the shipment plan with you. A warehouse hold must be arranged for that order; it is different from leaving a shipment at a carrier’s terminal, where storage charges can apply.
How does the Square compare with other outdoor sauna kits?
Start with the seating layout. The Square’s upper benches turn a corner, so people can face each other. Its rounded shell has a flat floor, two seating levels and a front porch. Compare the actual bench lengths, footprint, wood and heater package against the other sauna you’re considering. You can inspect the Square’s interior and rear-wall options in 3D here.
Why buy the Thermory Square from Sauna Marketplace?
One of our founders still owns the first Square sent to North America. We built it on camera and have used it to test heaters, ventilation and bench layouts. You get that experience when choosing your package and planning the build. We help with assembly questions and work with Thermory when a part or product issue needs attention.
What care will the wood need?
Let the sauna dry after use, clean it according to the care guide, and keep the roof cover in good condition. Thermal modification improves stability and decay resistance. Exterior wood still weathers toward silver. Follow Thermory’s maintenance guide if you want to preserve the original brown color.
Prebuilt
Sauna Brushes
Vents
Anonymous –
Love this sauna. Huge improvement over gym and barrels I’ve used in the past. Thank you fellas!
Verified owner Matt N. (verified owner) –
Love our new sauna. DIY assembly was not to difficult. Kit came with multiple wood slats instead of prefabricated wall sections. L shaped seating is a perfect distance from the Huum heater. Enjoying it almost daily.