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🌲 Expert Review: Thermowood Production's Oval Fasssauna 6.0 x 2.6 m Thermowood Barrel Sauna | Turnkey Mobile SPA Sauna

🌲 Expert Review: Thermowood Production's Oval Fasssauna 6.0 x 2.6 m Thermowood Barrel Sauna | Turnkey Mobile SPA Sauna

🔍 Why the Ovale Fasssauna 6.0×2.6 m is not just a "barrel sauna", but a precision-engineered modular spa zone

The oval barrel sauna combines the aerodynamic stability of a classic round design with the maximum usable volume thanks to its oval shape. The Ovale Fasssauna 6.0 x 2.6 m model from Thermowood Production is designed for those seeking a fully functional two-room sauna with a steam room, relaxation room, and optional bathroom—all in a portable format, eliminating the need for a major construction project.

By ordering directly from a full-cycle manufacturer, you receive:

  • Save 15–20% due to the absence of dealer markups
  • Direct quality control at every stage: from wood drying to final testing of the electrical network
  • Opportunity to visit the production facility in Zhytomyr to see first-hand the 215°C thermal modification technology and the assembly of the structure

This review provides a detailed analysis of materials, planning, safety, cost and operating conditions, based on actual plant specifications.

📊 Technical specifications of the Ovale Fasssauna 6.0×2.6 m

Parameter

Meaning

Dimensions (L×W×H)

6,000 × 2,600 × ~2,400 mm

Usable area

Steam room: 2.2 x 2.2 m

Total volume

~35 m³

Weight of the structure

~2,200 kg

Type of construction

Oval barrel sauna (frame-panel, factory-ready)

Main material

Thermally modified pine timber, 65 mm thick, thermally modified at 215°C

Exterior finishing

Tikkurila TVT5055 paint (brown), bituminous shingles.

Interior trim (optional)

Alder/linden lining, shelves made of thermal timber.

Again

Brown asphalt shingles with underlay

Door

1× sauna (Tesli RS 1900×700), 1× wooden entrance with lock

Windows

Metal-plastic 1200×1000 mm (rest room), option: panoramic 100% D-1m

Base price

Conditional on the website → exact in the commercial proposal

 

🌲 Material and technology – why 215°C thermal timber is a game-changer for oval saunas

🔬 Thermal modification technology for 65 mm profiled timber

The wood is processed at 215°C in an oxygen-free environment. This results in:

  • Hemicellulose breakdown → water absorption drops from 12–18% to 3–5%
  • Crystallization of lignin → the cell wall becomes rigid and resistant to deformation
  • Extraction of nutrients for insects and fungi → rot resistance class 1 (highest EN 350)

🆚 Comparison of wood species for saunas in Ukraine

Breed

Price

Advantages

Flaws

Expert's verdict

Scots pine

*

Inexpensive, accessible

Secretes resin, prone to rot, fungus

Not recommended for outdoor saunas

Alder

**

Good view, less resin

Deformation due to humidity, cracks

Average option, needs care

Ale

*

Light, less resin

Soft, susceptible to damage and fungus

Not for outdoor use

Thermowood 215°C

***

Zero shrinkage, aesthetics, rot resistance.

Highest starting price

✅ The optimal choice for a long-lasting sauna

🛡️ Tikkurila coating

  • Exterior : TVT5055 facade paint + underlayment under the tiles → protection from UV, precipitation, and temperature changes
  • Inside (optional) : Supi Saunasuoja oil → hypoallergenic, does not release toxins when heated, mold protection
  • Advantage : No annual sanding or repainting required. Basic maintenance every 3-5 years is sufficient.

💡 Expert note : Most manufacturers skimp on underlayment under the shingles, which leads to leaks within 2-3 years. Thermowood Production uses underlayment without fail.

 

🛋️ Planning, comfort and engineering

Element

Technical solution

Expert commentary

Steam room 2.2 x 2.2 m

Optimal volume for 4-6 people, effective heating

Compact, but enough for a family or group of friends

Recreation room 2×2.68 m

Space for benches, a table, hangers, and the possibility of placing a mini-bathroom.

The key advantage of the oval: a separate area for relaxation after the steam room

Oval shape

Aerodynamic stability + maximum useful volume

Reduces wind load by 30% compared to rectangular modules

Panoramic window (optional)

Sphere 500 mm, tempered glass 8 mm, 100% D-1m circle.

Visually expands the space, creating the effect of a "sauna in nature"

Electricity (optional)

Wiring, double switch, lights in the steam room, 220V socket

Low voltage system, waterproof housings, safe connection

Ventilation

Air valves for ventilation

Prevents moisture stagnation, extends the service life of wood.

💡 Engineering note : The oval shape is not only aesthetically pleasing – it ensures even heat distribution throughout the entire volume, allowing you to heat up the sauna in 30 minutes with a small amount of firewood.

 

🔒 Safety and fire protection

Component

Purpose

Conformity standard

Harvia SL 20 stove (optional)

Firebox from the outside → safety, no trash in the steam room

Certified for saunas, power 20 kW

Stainless steel pipes + spark arrestors

Spark protection, long-lasting chimney

AISI 304, corrosion resistance

Metal overlays + drip cap

Protecting wood from condensation and high temperatures

Prevents rotting in the chimney area

LED electricity (optional)

Waterproof lamps, correct wire cross-section

IP44+ for steam rooms, compliant with DSTU and European standards

Lock on the front door

Property safety when placed in an open area

Reliable fixation, resistant to moisture

🛡️ Important : The base price on the website is approximate. The exact price is calculated individually after agreeing on the options: stove, panoramic window, electricity, interior paneling.

 

💰 Transparent pricing and optional equipment

Additional option

Price (approximate)

Notes

Basic configuration of Ovale 6.0×2.6 m

Conditional on the site

Includes frame, 65mm thermal timber, roof, door, and basic window

Harvia SL 20 wood-burning stove (outdoor firebox)

+40 219 UAH

Recommended power for a steam room volume of ~10–12 m³

Stainless steel pipes + linings + drip cap

+5 106 UAH

Required for safe operation

Panoramic window sphere 500 mm (2 pcs.)

+27 600 UAH

"Sauna in nature" effect, 8 mm tempered glass

Electricity (wiring, switches, lights, sockets)

+6 100 UAH

Waterproof, ready to connect

Interior paneling: alder lining

+17 800 UAH

Aesthetics + an additional layer of thermal insulation

400×400 window in the steam room (opens)

+4 560 UAH

For ventilation and temperature control

Internal oil treatment at Supi Saunasuoja

+6 840 UAH

Moisture and mold resistant, hypoallergenic

Towel hanger (small, 2 pcs.)

+1 244 UAH

A convenient accessory for organizing space

Greus cedar thermo-hygrometer

+990 UAH

Temperature and humidity control in the steam room

Headrest (1 pc.)

+322 UAH

Comfort during procedures

📌 Final formula :
Base + Selected options + Delivery + Installation (10%) = Final turnkey price
. All prices are fixed, no hidden fees. The manufacturer provides detailed specifications upon signing the contract.

 

⚖️ Expert Table "Advantages and Nuances"

Category

✅ ADVANTAGE

📝 Details

⚠️ NUANCE

🛠️ Expert solution

🌲 Material

Thermal timber 215°C, zero shrinkage, rot-resistant

Does not require annual treatment, does not crack or deform

The initial cost is 15-20% higher than regular pine.

Pays for itself in 3-4 years without any repair or painting costs

🛋️ Planning

Two separate rooms: steam room + relaxation room

Convenient for families, you can add a bathroom, the effect of a "full-fledged bathhouse"

When fully loaded (6 people) it may feel compact

Ideal for 4-5 people. For larger groups, consider the 7.0 x 3.0 m model.

🔌 Electricity

Option of ready-made wiring with moisture-proof elements

Safe, aesthetically pleasing, low energy consumption

The basic package does not include external wiring to the panel.

Add a VVGng 3×4 mm² cable and a 16A circuit breaker when installing on-site.

🔥 Security

A stove with a firebox from the outside, spark arrestors, stainless steel pipes.

Complete fire protection of the stove and chimney area, certified materials

The stove and stones are not included in the base price.

Choose a furnace with DSTU certification. Have a licensed professional install it.

💰 Price

Direct sales from the manufacturer, saving 15-20%

Fixed price, transparent specifications, no dealer markups

Delivery and installation are paid separately (depending on the region)

Order a comprehensive turnkey service for a fixed final price

🚛 Mobility

Factory ready, weight ~2200 kg, without a capital foundation

Installation in 1 day on a prepared site, easy to transport

A level foundation (piles, blocks) and access for the crane are required.

We provide free support point drawings and unloading support.

 

❓ FAQ — Engineer's Answers

❓ Is a 6.0×2.6 m Ovale foundation required?

Yes, but a major overhaul isn't necessary. Optimally:

  • Screw piles (6–8 pcs.) or FBS concrete blocks
  • A level area with a sand and gravel cushion
  • Distance from ground to bottom trim: ≥15cm for ventilation

❓ Can the dome be used in winter?

Yes. Thermal timber is stable at temperatures from -30°C to +40°C. Recommendations:

  • Heat the oven gradually (at minimum for the first 15 minutes)
  • Check the tightness of windows and doors before the season
  • Install additional thermal insulation for floors if used continuously in winter.

❓ What is included in the "basic package"?

  • ✅ Frame made of 65 mm thermal timber
  • ✅ Exterior cladding, Tikkurila TVT5055 paint
  • ✅ Roof: asphalt shingles + underlayment
  • ✅ Door: sauna (Tesli RS) + wooden entrance door with lock
  • ✅ 1200×1000 mm metal-plastic window in the recreation room

❌ Stove, panoramic window, electricity, interior paneling, accessories

❓ Is it possible to order custom options?

Yes. The manufacturer offers:

  • Changing the location of windows/doors, adding a bathroom
  • Additional insulation (100 mm basalt wool + foil)
  • Improved ventilation (100mm Ø valves)
  • Outdoor LED lighting for the facade, terrace, and hot tub

❓ How to visit the production facility?

Book by phone or messenger. We offer tours daily (by prior arrangement). You'll see:

  • Drying and thermal modification chambers
  • Assembling oval structures under controlled conditions
  • Electrical and fire testing
  • Ready-made warehouses and packaging line

 

📋 Step-by-step ordering process

  1. Consultation (1 day) → Clarification of dimensions, options, furnace selection
  2. Contract and 30% advance payment (2–3 days) → Price fixed in UAH, production launch
  3. Production (3-5 weeks) → Photo/video reports weekly, quality control
  4. Final testing and packaging (2 days) → Electrical, fire safety, and air tightness testing
  5. Delivery and installation (1–3 days depending on the region) → Manipulator, installation on the foundation, connection of utilities
  6. Warranty and support → 5 years for the structure, 2 years for electrical parts/hardware

 

🎯 Final Conclusion: Why the Ovale Fasssauna 6.0×2.6 m is an Investment in Durability

"Buying directly from the manufacturer isn't about saving money. It's an investment in control, quality, and transparency.

Ovale Fasssauna 6,0×2,6 м от Thermowood Production.

  • Thermal timber 215°C — stability, no rotting, zero shrinkage
  • Engineering safety - full fire protection, certified electricity, moisture-resistant materials
  • User comfort – two separate rooms, panoramic glazing, ergonomic layout
  • Transparent pricing - individual calculation, no hidden fees, saving 15-20% off the market
  • Full production cycle – from wood drying to final testing. We invite you to the factory!

🏆 Expert verdict : If you're looking for a portable sauna that will last 25-40 years without major repairs, doesn't require annual maintenance, and guarantees the safety of your family, the Ovale Fasssauna from Thermowood Production is the optimal choice in its segment.

 

📞 Contact us for orders and consultations

📩 Write "OVALE 6.0" on WhatsApp - and receive in 24 hours:

  • ✅ Detailed 3D visualization and drawing of support points
  • ✅ Personalized cost estimate including delivery and installation
  • ✅ Catalog of stoves and accessories with engineer recommendations
  • ✅ Production schedule and warranty conditions

🎁 Bonus with your order : Free site preparation consultation with an engineer + a free basic care kit for thermally modified wood!

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🎁 For subscribers : exclusive production videos, installation life hacks, early access to new models, and technical operating guides.

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