ADVERTORIAL
Turn Your Empty Backyard Into a Private Scandinavian Wellness Retreat (For Less Than a 2-Year Spa Membership)
The Scandinavian-designed outdoor cube sauna that's turning American backyards into private wellness retreats. Handcrafted in Northern Europe with thermo-treated wood. Ships flat-rate. Assembles in a weekend.
- Outlasts cedar by 1.5x outdoors - Thermo-Spruce exterior shrugs off rain, snow, and UV
- Look out at your backyard while you sauna - full panoramic glass front, not a dark wooden box
- Hit 230°F for authentic Finnish heat - with the HUUM Drop heater (sold separately)
- Set the mood from your phone - Wi-Fi app-controlled LED lighting included in every model
- Arrives on Friday, first session by Sunday - no contractor needed for the sauna itself
VIP Damage Protection + Priority Processing Included
"My wife and I were spending $380 a month on a wellness spa just for the sauna. That's over $4,500 a year. The CL4G paid for itself before we even hit the one-year mark. We use it almost every night now. Step out the back door, it's already preheated from the app, and we're in our own private sauna in 30 seconds. The glass front makes it feel like a completely different experience than any enclosed sauna I've been in. This thing is a showpiece in our backyard."
Every order includes priority processing and full damage coverage during shipping.
$950 flat-rate freight to the contiguous US. No hidden fees, no surprises.
Designed and built using traditional Scandinavian sauna-making methods.
Your Backyard Is Sitting Empty 10 Months a Year (And Spa Memberships Are Bleeding You Dry)
Look, you've been thinking about getting a sauna.
Maybe for months. Maybe every time you drive past the spa and think "I should just build my own."
But every path leads to a dead end.
Spa memberships? $200–$500 a month. After 24 months you've handed $12,000 to a gym - and you don't own a single plank of wood. You're renting relaxation.
Barrel saunas? They look great in the photos. Then you sit inside one and realize the curved walls eat half the space. And after 3–5 years outdoors? Warped. Rotting. Done.
Infrared pods? Flimsy. Embarrassing. No real heat. The kind of thing you hide when guests come over.
Custom builds? You're looking at $15,000–$50,000+, haggling with contractors, 4-month permit delays, and a backyard that looks like a construction zone.
Here's the honest truth: most people who want a sauna end up stuck in research mode for 6+ months because nothing hits the sweet spot between "actually good" and "won't bankrupt me."
Here's what the "solutions" actually cost you:
| Alternative | Cost | The Problem |
|---|---|---|
| Spa / wellness memberships | $200–$500/mo | Inconvenient, shared space, no equity built |
| Custom-built sauna room | $15,000–$50,000+ | Contractor, permits, months of construction |
| Barrel saunas | $2,000–$4,000 | Cramped, warps outdoors, rots in 3–5 years |
| Portable / tent saunas | $200–$800 | Flimsy, no real heat, embarrassing to own |
So what do you actually need?
A sauna that looks stunning in your backyard. That handles outdoor weather for decades. That heats like a real Finnish sauna.
Without spending $20K+ on a custom build.
That's exactly what the CL Series was designed for.
The Cube Series: The Best of Both Worlds-Barrel Meets Cabin
Here's what makes this design different.
The CL Series takes direct inspiration from the barrel sauna - but brings in the comfort of a classic cabin. You get the best of both shapes in one.
The roundedness of a barrel: See those curved exterior corners? That's not just for looks. In a traditional square cabin, hot air rises and gets trapped in the sharp 90-degree corners. Dead air. Uneven temperatures. The Cube's rounded shape promotes continuous air circulation throughout the cabin, keeping heat moving in a steady, efficient thermal loop.
Translation: consistent, enveloping warmth everywhere - not hot spots near the ceiling and cold feet on the floor.
The spaciousness of a cabin: Unlike a barrel where every wall is curved and eats into your usable space, the Cube has flat interior walls. No curved benches forcing you into weird positions. No hunching to avoid the sloped ceiling.
You can sit upright with a proper backrest. Stretch your legs. Lay fully flat on the CL4G's 6'3" bench.
It's the comfort of a full-size cabin in a footprint that fits almost any backyard.
It's the sauna design that barrel owners wish they'd bought instead.
The Wood That Makes It Last: Thermo-Treated Technology
Here's something most sauna shoppers don't think about until it's too late.
Most outdoor saunas are built from Western Red Cedar or untreated spruce. Both have the same problem: expose them to rain, snow, UV, and temperature swings, and they warp, crack, and rot within years.
The CL Series uses something completely different - thermally modified wood.
How thermo treatment works
Raw timber goes into a specialized kiln at 400°F+ in a controlled, oxygen-free environment. For several days.
Without oxygen, the wood doesn't burn. Instead, the sugars, resins, and organic compounds that attract moisture, mold, and insects get cooked out at a molecular level.
Translation: we "Pressure-Cook" the rot right out of the wood. No chemicals. No treatments. Just heat and science.
What comes out is a completely different material - harder, more stable, and naturally resistant to decay.
This "Thermo-Tech" is the same specification used in $10,000+ European health retreats-now available for your backyard.
Thermo-treated wood is the material of choice in premium Scandinavian saunas and luxury spa installations. The kind of places that charge $90 an hour to sit in.
The CL Series gives you that same quality material.
Exterior - Thermo-Spruce
- Dimensionally stable - won't warp, twist, or cup from rain/snow/sun cycles
- Naturally rot-resistant without any chemical stains or treatments
- Resists mold, fungi, and insects - the food sources they feed on have been removed
- Lasts 1.5x longer than Western Red Cedar in outdoor conditions
- 42mm thick staves (1.7") for superior heat retention and insulation
- Maintains its rich color - even, warm tone that improves with age
Interior Benches - Thermo-Aspen
- Cool to the touch even at 200°F+ - you can sit comfortably on bare wood
- Silky, satin-smooth finish that feels premium against bare skin
- Low thermal conductivity - no burning, no towel required
- Naturally hypoallergenic and odor-free
- The preferred bench wood in high-end Scandinavian saunas
- Ergonomic backrests for genuine comfort during long sessions
What Your First Session Actually Feels Like
I get asked this a lot. So here's the honest answer.
0–5 minutes: You open the glass door and step inside. First thing you notice - the Thermo-Aspen bench is cool to the touch. Not scalding like cheap pine. You sit down, lean back against the backrest, and the panoramic glass front floods the space with natural light.
The scent of clean, warm wood surrounds you.
It feels like a Nordic spa. Not a box.
5–15 minutes: The heater brings the room to full temperature. You ladle water onto the stones and hear that deep, satisfying hiss. Real löyly steam rises - soft, thick, not the harsh blast you get from a cheap heater.
Your shoulders drop. Your breathing slows. Muscles you didn't know were clenched start to release.
This is the part where most people close their eyes and think: "Why didn't I do this sooner?"
15–30 minutes: Deep, full-body sweat. The kind you feel in your bones.
You're looking out the glass front at your own backyard. Maybe the sunset. Maybe snowfall. Maybe just the quiet of a Tuesday night.
No drive home. No membership fee. No sharing with strangers.
This is yours. Every single night if you want it.
Choose Your Heater: The Heart of Your Sauna
The CL Series cabin and heater are sold separately. And that's on purpose.
It means you pick the heater that matches how you like to sauna. Not whatever the manufacturer bundled in to cut costs.
Two world-class options. Both available with WiFi so you can hit "start" on the drive home from work and walk into a hot sauna 45 minutes later:
HUUM Drop Wifi
The serious sauna enthusiast's choice
$3,395 (WiFi included)
Maximum Temperature
- Massive stone capacity - the key advantage
- Stones barely lose temp when you ladle - throw water continuously
- Produces thick, soft, consistent löyly steam
- WiFi version available - preheat from your phone
- Sleek, modern sculptural design
- More stone = more thermal mass = better sauna
Harvia KIP Wifi
Reliable Finnish engineering on a budget
$2,148 | No-WiFi model: $1,317
Maximum Temperature
- World's largest sauna heater manufacturer
- Compact wall-mount design
- WiFi available (Xenio Digital Control Panel)
- Solid steam for relaxing everyday sessions
- More affordable entry point into Finnish sauna
- Proven reliability across thousands of installs
The Science of Steam: Why Stone Mass Defines Your Experience
In Finland, they have a word for it. Löyly.
It's the steam that rises when water hits heated stones. And in Finnish culture, it's not just steam. It's the soul of the entire sauna experience.
Every quality heater produces löyly. But the volume of stones inside the heater? That changes everything about the character of the heat.
The Precision Heater: Harvia KIP
There's a reason the KIP is the most popular sauna heater on earth.
It's built for efficiency. A targeted stone load means it reaches peak temperature fast. We're talking ready-to-go in 30 minutes.
If you're the kind of person who wants to walk in, get a crisp, intense session, and get on with your evening? This is your heater.
The steam is direct. Invigorating. No waiting around.
Translation: the KIP is a high-performance sports car. Fast, reliable, and built to perform when speed and simplicity are your top priorities.
The High-Capacity Heater: HUUM Drop
If the KIP is a sports car, the HUUM is a luxury cruiser.
The difference is the stone bed. It's massive. And that extra mass creates what engineers call a "thermal reservoir."
Here's what that means for you:
When you ladle water onto a massive stone bed, it doesn't just flash into steam. It rolls off the stones in a thick, soft, enveloping wave.
Because there's so much thermal mass, the stones barely lose temperature between ladles. You can throw water continuously. The steam stays rich from the first ladle to the last.
That's the kind of löyly that makes you close your eyes and forget what time it is.
So which experience is right for you?
Choose the KIP if: You value a fast pre-heat time, prefer a traditional "dry" heat feel, and want a proven workhorse design that's been the gold standard for millions of homes worldwide.
Choose the HUUM if: You prefer "wet" sauna sessions, enjoy staying in for longer stretches, and want steam quality that feels soft and consistent from the first ladle to the last.
Either way, you're getting a world-class Finnish heater. There's no wrong choice here. Just different experiences.
| HUUM Drop ⭐ | Harvia KIP | |
|---|---|---|
| Max Temperature | 230°F | 190°F |
| Stone Mass | High (superior steam) | Standard |
| Steam Quality | Thick, consistent löyly | Good, but stones cool faster |
| WiFi Control | Yes | Yes (Wifi Option) |
| Design | Wall-mounted modern drop design | Classic wall-mount |
| Price | $3,395 (WiFi) | $1,317 | WiFi: $2,148 |
| Best For | High heat and löyly enthusiasts | Budget-conscious buyers |
⚡ Electrical note: Both heaters require a 240V dedicated circuit. This is the only professional installation step. The sauna cabin itself can be DIY assembled.
From Delivery to Your First Session
It Arrives on a Pallet
Flat-rate freight shipping ($950 for most models). Curbside delivery right to your door. Everything arrives in one shipment.
Assemble in a Weekend
Modular design–two people, basic tools, no contractor needed for the cabin itself. No special skills required.
Wire, Heat, Enjoy
Your electrician wires the 240V circuit. Mount your heater, load the stones, and your first session starts tonight.
How the Cube Series Stacks Up
| CL Series | Barrel Saunas | Custom Builds | |
|---|---|---|---|
| Outdoor Durability | ✓ Thermo-Spruce | ✗ Cedar warps & cracks over years | ~ Depends on materials |
| Interior Space | ✓ Flat walls, full usable cabin | ✗ Curved walls eat space | ✓ Fully custom |
| Airflow | ✓ Rounded exterior, no air pockets | ~ Often poor | ~ If engineered well |
| Backyard Aesthetics | ✓ Modern glass front | ✗ Rustic barrel look | ✓ If $30K+ budget |
| Max Heat | ✓ Up to 230°F (HUUM) | ~ Depends on heater | ~ Depends on heater |
| Price | ✓ $4,940–$11,290 | ~ $2K–$6K | ✗ $15K–$50K+ |
| Assembly | ✓ Weekend DIY + electrician | ✓ Weekend DIY + electrician | ✗ Weeks + contractor |
| Bench Wood | ✓ Thermo-Aspen (cool-touch) | ✗ Often untreated pine | ~ Varies |
What Cube Sauna Owners Are Saying
"We had a barrel sauna for three years and I honestly thought that was as good as it gets for a home setup. I was wrong. The CL5G is a completely different experience. The flat interior walls make it feel twice the size. You can actually sit with your back against a proper backrest, and my husband can lay fully flat on the bench. In the barrel, he always had to curl up. The heat distribution is noticeably better too. No weird hot spot at the top with cold feet thanks to the two level benches. Very happy to have made the switch."
"I went with the HUUM Drop heater on the recommendation from the Topture team, and I'm glad I did. The stone mass on that thing is unreal. I can throw ladle after ladle of water and the steam just keeps coming. Thick, soft, exactly like the saunas I used in Finland. The WiFi control is the other game changer. I hit 'start' on the app when I leave the office, and by the time I pull into the driveway 35 minutes later, the sauna is at 210 degrees and waiting for me. It's become my daily wind-down ritual."
"I'll be honest, I was nervous about the assembly. I'm not a handy person. But the modular design is genuinely well thought out. My brother and I built the whole thing in a Weekend. The electrician came Monday morning, had the 240V wired in about 45 minutes, and we did our first session that same evening. Six months in, we use it 4–5 times a week. Through a Minnesota winter. The thermo-spruce wood hasn't moved a millimeter. No warping, no cracking, nothing. It looks exactly like the day we built it."
"Look, I started Topture because I was tired of watching people get burned. Either they'd overpay for a custom build that took months, or they'd buy cheap from Amazon and end up with a $2,000 pile of warped wood and no one to call.
We work directly with the Scandinavian manufacturers who've been building saunas the right way for generations. Real wood. Real craftsmanship. Zero shortcuts.
Every unit we ship, I'd put in my own backyard. And if something ever goes wrong - you call us. A real human answers. We fix it. That's it."
Choose Your Cube Sauna
Five sizes. One design philosophy. All built with thermo-treated wood and full glass fronts.
⚠ Why We Can't Keep These In Stock
Each CL Series batch is handcrafted in our Northern European workshop and shipped overseas-a process that takes 8–12 weeks between batches. We receive a limited number of units per shipment, and recent batches have sold out before the next container even clears customs. If the model you want shows as available, that's your window. Once it's gone, the wait starts over.
CL4G
3 Person • 6'3" lay-down bench
$4,990
+ $950 flat-rate shipping
View CL4G →Best value
CL7G
6 Person
$7,990
+ $950 flat-rate shipping
View CL7G →Best for: Large families, serious enthusiasts
CL12G
8 Person + Changing Room
$10,990
+ $1,990 flat-rate shipping
View CL12G →The ultimate backyard sauna suite
All models include VIP Damage Protection + Priority Processing. Heater sold separately-see our heater guide above.
What's Included (That Competitors Charge Extra For)
- ✅ VIP Damage Protection + Priority Processing - other brands charge $200–$400 for shipping coverage
- ✅ Flat-rate shipping - $950 to anywhere in the contiguous US (competitors quote $1,200–$2,500)
- ✅ Wi-Fi LED lighting system - typically a $150–$300 add-on with other sauna brands
- ✅ Thermo-Aspen benches with ergonomic backrests - the premium bench wood used in $15K+ Finnish saunas
- ✅ Stainless steel bands, shingled roof, ventilation & floor drain - all included, nothing sold separately except the heater
- ✅ Zero sales tax - save $250–$565 compared to buying from a taxed retailer
Not available on Amazon or eBay.
Frequently Asked Questions
No-the heater is sold separately, which gives you the freedom to choose the right one for your style. We recommend the HUUM Drop for serious steam lovers (reaches 230°F with massive stone capacity) or the Harvia KIP for a budget-friendly option (190°F). Both are available with WiFi control so you can preheat your sauna remotely.
A licensed electrician needs to install a 240V dedicated circuit for your heater. The sauna cabin itself assembles without any professional help-just two people and basic tools over a weekend.
Yes. The Thermo-Spruce exterior is specifically engineered for outdoor conditions. It's dimensionally stable through freeze-thaw cycles, naturally rot-resistant without chemical treatments, and lasts 1.5x longer than Western Red Cedar. The 42mm (1.7") thick staves provide excellent insulation even in extreme cold.
Most customers assemble the sauna cabin in a weekend with two people and basic hand tools. The modular design means everything you need comes in the package. You just need your electrician to wire the 240V circuit for the heater and you're ready for your first session.
The HUUM Drop reaches 230°F vs 190°F for the Harvia. More importantly, the HUUM holds significantly more stones, which results in a better steam quality. With more thermal mass, the stones stay hot between ladles so you can throw water continuously for thick, consistent löyly (steam). The Harvia KIP is more budget-friendly but has less stone capacity, so steam comes in shorter bursts. Both offer WiFi control.
Requirements vary by municipality. Most areas don't require permits for freestanding outdoor structures under a certain size, but we recommend checking your local building codes before ordering. Your electrician can also advise on any electrical permit requirements for the 240V circuit.
Thermo-Spruce undergoes a chemical-free heat treatment at 400°F+ that fundamentally changes the wood's structure-removing the sugars and resins that attract moisture, mold, and insects. The result is wood that's more dimensionally stable (won't warp or crack), more rot-resistant, and lasts roughly 1.5x longer outdoors than cedar. Cedar is a good wood, but it still contains organic compounds that break down over time when exposed to the elements.