front angle view of sauna squares
front view of sauna squares
back view of sauna squares
side view of sauna squares
barrel front angle

Front angle

barrel front


barrel back


barrel side


Natural Square Saunas

Smart shape. Sweeping views.

Nordic spruce gets a fresh look in a square silhouette with curved contours. Take in the view from the full tempered-glass front of your Thermory Sauna Square while you rest your feet on the tiered bench. Go ahead, stay awhile.

The most spacious

The height and width of our squares give you seven feet of headroom and deep benches to sit or fully recline.

The most durable

Thermally modified Nordic spruce never shrinks for unmatched durability and stability, along with 25 years of proven rot resistance.

The most comfortable

Unlike cedar, which can become rough, our Nordic softwood is milled to give you the smoothest surface that’s never too hot.

Thermal modification isn’t our only difference.

Ours are the only thermally modified saunas in North America. So, you get the beauty of real wood, naturally enhanced with only heat and steam for unequaled durability and stability. And your sauna never shrinks—even in changing weather conditions. Cedar can’t say that.

Functional design

Thermory Square Saunas are larger than standard barrel saunas. The interior of our most spacious model measures more than seven feet across, giving you plenty of height for standing and deeper benches for lying down.

Thickness and strength

Our staves are thicker than most (if not all) in the barrel sauna market. This contributes to your sauna’s solid construction and overall weight, giving you greater durability and heat retention while minimizing outside noise.

Front angle of the square sauna

Rot resistance

Our saunas are thoughtfully constructed with a keystone stave at the top and bottom. These allow the remaining staves to point upward to reduce the potential of water being trapped in the gaps. So, you get 25 years of worry-free rot resistance.

Color transformation

The color of Thermory Nordic spruce transforms into a distinguished silver when exposed to sunlight and rain. But if you want to preserve your sauna’s natural color, simply treat the boards with a penetrating UV protective oil.

Heat. Steam. Cool. Done.

Thermal modification is a chemical-free process that gives you the beauty of real wood, naturally enhanced with only heat and steam for unequaled strength and stability—even in changing weather conditions. And with greater insulating properties compared to unmodified wood, our wood is never too hot on your feet.

The right wood. The right way.

We source all our wood using responsible forestry practices, never laying a finger on our tropical woodlands and rainforests. And wood is the only naturally renewable building material that doesn’t generate hazardous waste. So, when you choose Thermory, you’re not just investing in quality, but in the health of our planet, too.

If it’s good enough for them, it’s good enough for you.

When you supply the wood to build saunas in Scandinavia—the home of sauna culture—you must be doing something right. So, go with the sauna chosen by the people who know best.

Sitting porch

Your Thermory Sauna Square’s porch is the perfect place to take breaks between sessions. It’s also a good spot to leave your shoes, your robe, and your troubles.

Inside view of bench in sauna


When you entertain in your Thermory Sauna Square, there’s never a bad seat in the house. Plus, you can rest your feet on the convenient lower bench.

Extra-wide window

No matter what’s outside—rain, snow, or jealous neighbors—enjoy the view through your Thermory Sauna Square’s dramatic, rectangular window.

All-weather protection

Your Thermory Sauna Square’s thermally modified wood is built to withstand the elements for up to 25 years. But if you want to baby this beauty, the rain jacket is included for coverage in wet weather.

Heating options

With a minimalist design and high stone capacity, HUUM heaters give you long-lasting heat and steam. And your sauna’s curved interior ensures even heat distribution, so nobody fights for the “good seat.”

Inside view of Sauna

Square specifications

Extend your entertainment area with the ultimate relaxation destination. Our 40 Series “Large” squares can bathe four to six people in heat and steam with Wi-Fi enabled HUUM heater, included. Customize yours with an extra-wide window. Plus, all models come with a rain jacket for all-weather protection.

Front porch


Rain jacket

Ready for all weather

Length:8.24′Back Bench Length:6.5′
Width:6.90′Back Bench Width:1.61′
Height:7.21′Volume:241 CU. FT.
Window:6.3' x 3.2'Heater:11KW
Side Bench Length:4.30'Board Thickness:1.57"
Side Bench Width:1.61'


We pride ourselves on our attention to detail—right down to our installation guides. Your Thermory Square Sauna comes with pre-cut and pre-milled staves and cradles, so there’s no cutting necessary. In less than a day, you and a few friends can have your sauna fully constructed.

Installation guides

Smiling and relaxing woman sitting in a sauna

Take the next step.

How you spend your downtime deserves the attention to detail to make it extraordinary.


With your choice of shape, sizes and options, Thermory Saunas give you the freedom to customize your sauna experience to make it truly your own.


Simply request a consultation to get started.

Front view of natural barrel sauna
Front view of the sauna square
Front of Ignite Barrel Sauna