Finnish Sauna Builders Custom Indoor Sauna Room - 6' x 10' x 8' By Finnish Sauna Builders - Custom Sauna

Custom Indoor Sauna Room - 6' x 10' x 8' By Finnish Sauna Builders

Western Red Cedar / No Accessories / No Heater
$11,357.00
Sale price  $11,357.00 Regular price 
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Finnish Sauna Builders Custom Indoor Sauna Room - 6' x 10' x 8' By Finnish Sauna Builders - Custom Sauna
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Custom Indoor Sauna Room - 6' x 10' x 8' By Finnish Sauna Builders

$11,357.00
Sale price  $11,357.00 Regular price 
Wood type
Accessory Packages
Heater

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Custom Indoor Sauna Room - 6' x 10' x 8' By Finnish Sauna Builders

Transform your home into a wellness retreat with the Finnish Sauna Builders Custom Indoor Sauna Room Kit. This complete sauna package includes everything you need to build an authentic Finnish sauna experience, whether you're a DIY enthusiast or a professional contractor.

Complete Sauna Kit - Ready for Your Spa

Our custom indoor sauna kit arrives with all interior components precisely cut and tailored to your room dimensions. Simply provide the framing, insulation, electrical wiring, and exterior wall covering—we supply the rest. Building your dream sauna has never been easier or more affordable.

Premium Wood Options - Choose Your Perfect Finish

Select from three exceptional wood types, each offering distinctive benefits for your sauna interior:

Grade A Knot-Free Western Red Cedar

The classic choice for sauna enthusiasts. This premium softwood remains comfortably cool to the touch during sauna sessions and naturally resists moisture and decay. Enjoy its refined, knot-free appearance with beautiful color variations ranging from reddish to pinkish-brown tones, accented with darker bands and pale sapwood streaks.

Thermo Aspen/Alder

Experience the luxury of intense thermally modified wood, heat-treated at 419°F or higher. This advanced process creates a stunning deep, rich color while dramatically enhancing durability and dimensional stability. Perfect for those seeking a modern, sophisticated aesthetic with superior performance. Suitable for both indoor and outdoor applications.

Thermo Poplar

A thermally modified wood treated at approximately 374°F for optimal indoor sauna use. This medium modification delivers enhanced dimensional stability, improved resistance to humidity and temperature fluctuations, and a warm, rich tone—all achieved through a chemical-free process. Ideal for creating a naturally beautiful, long-lasting sauna environment.

Customizable Bench Configurations

Choose the bench layout that best fits your space and needs from our selection of configurations shown in the product images. Each configuration is designed to maximize comfort and optimize your sauna experience.

Sauna Heater Comparison Chart

Feature Harvia Cilindro PC90 9KW Harvia Cilindro PC90E 9KW Harvia Virta 9KW EOS Cubo Avantgarde 9KW EOS Mythos S35 9KW
Product Image Harvia Cilindro PC90 Sauna Heater Harvia Cilindro PC90E Sauna Heater Harvia Virta 9KW Sauna Heater EOS Cubo Avantgarde 9KW Sauna Heater EOS Mythos S35 9KW Sauna Heater
Power Output 9 KW 9 KW 9 KW 9 KW 9 KW
Brand Harvia Harvia Harvia EOS EOS
Control Type Built-in Control WiFi Control WiFi Control WiFi Control WiFi Control
WiFi Connectivity ❌ No ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Heater Stones Included ✅ Yes ✅ Yes ✅ Yes ✅ Yes ✅ Yes
Railing Included ❌ No ❌ No ✅ Yes ❌ No ❌ No
Model Series Cilindro Series Cilindro Series Virta Series Cubo Avantgarde Series Mythos Series
Model PC90 PC90E Virta Cubo Avantgarde Mythos S35
Remote Control Manual only App-based via WiFi App-based via WiFi App-based via WiFi App-based via WiFi

Harvia Cilindro PC90 9KW Built-in Control

Harvia Cilindro PC90 Sauna Heater
Power Output
9 KW
Brand
Harvia
Control Type
Built-in Control
WiFi Connectivity
❌ No
Heater Stones Included
✅ Yes
Railing Included
❌ No
Model Series
Cilindro Series
Model
PC90
Remote Control
Manual only

Harvia Cilindro PC90E 9KW WiFi

Harvia Cilindro PC90E Sauna Heater
Power Output
9 KW
Brand
Harvia
Control Type
WiFi Control
WiFi Connectivity
✅ Yes
Heater Stones Included
✅ Yes
Railing Included
❌ No
Model Series
Cilindro Series
Model
PC90E
Remote Control
App-based via WiFi

Harvia Virta 9KW WiFi with Railing

Harvia Virta 9KW Sauna Heater
Power Output
9 KW
Brand
Harvia
Control Type
WiFi Control
WiFi Connectivity
✅ Yes
Heater Stones Included
✅ Yes
Railing Included
✅ Yes
Model Series
Virta Series
Model
Virta
Remote Control
App-based via WiFi

EOS Cubo Avantgarde 9KW WiFi

EOS Cubo Avantgarde 9KW Sauna Heater
Power Output
9 KW
Brand
EOS
Control Type
WiFi Control
WiFi Connectivity
✅ Yes
Heater Stones Included
✅ Yes
Railing Included
❌ No
Model Series
Cubo Avantgarde Series
Model
Cubo Avantgarde
Remote Control
App-based via WiFi

EOS Mythos S35 9KW WiFi

EOS Mythos S35 9KW Sauna Heater
Power Output
9 KW
Brand
EOS
Control Type
WiFi Control
WiFi Connectivity
✅ Yes
Heater Stones Included
✅ Yes
Railing Included
❌ No
Model Series
Mythos Series
Model
Mythos S35
Remote Control
App-based via WiFi

Key Differences

Power & Heating Capacity:

  • All models: 9 KW power output for powerful heating performance in larger sauna rooms

Brands:

  • Harvia (Finnish): Cilindro PC90, Cilindro PC90E, Virta — trusted Finnish heritage brand with decades of sauna expertise
  • EOS (German): Cubo Avantgarde, Mythos S35 — premium German engineering with innovative design aesthetics

Control & Connectivity:

  • Cilindro PC90: Basic built-in control panel only — no remote or app features
  • Cilindro PC90E, Virta, EOS Cubo Avantgarde & EOS Mythos S35: WiFi-enabled for smartphone control and scheduling

Design & Model Series:

  • Cilindro Series: Iconic cylindrical design with large stone capacity, available in standard (PC90) and WiFi-enabled (PC90E) versions
  • Virta Series: Premium Harvia model with WiFi control and included protective safety railing
  • EOS Cubo Avantgarde: Bold cubic form with WiFi control and a striking modern aesthetic
  • EOS Mythos S35: Sleek, minimalist German design with WiFi connectivity and high stone capacity
What's Included in Your Kit
  • Foil vapor barrier for proper moisture protection
  • Ergonomic backrests for comfortable relaxation
  • 1×4 tongue & groove boards (walls & ceiling) in your selected wood
  • Clear 1×4 bench boards with supports (20″ deep) in matching wood—custom-built to your chosen configuration
  • Corner moldings for walls, ceiling, and baseboards (matching wood)
  • All-glass sauna door with wood handles and trim
    • Frame: 27.2″ × 78.7″ (690 × 2000 mm)
    • Glass: 24.4″ × 77.3″ (620 × 1963 mm)
    • Frame thickness: 1.65″ × 3.6″ (42 × 92 mm)
    • Rough opening required: 28″ × 80″
  • Duckboard flooring for walk area (matching wood)
  • Upper and lower vent grills for proper air circulation
  • Traditional sauna bucket with liner and ladle
  • Sauna thermometer for temperature monitoring
  • Comfortable headrest
  • Marine-grade, wall-mount, vapor-proof sauna light
  • Detailed installation instructions for easy assembly
Important Installation Notes

Recommended ceiling height is 8 feet per manufacturer safety and clearance guidelines. For custom ceiling heights, please contact our support team.

Perfect for Home or Commercial Use

Whether you're building a personal wellness sanctuary or outfitting a spa or gym, our DIY sauna kits deliver professional-quality materials at competitive prices.

Expert Support Available

Contact your Finnish Sauna Builders Specialist today for personalized guidance in creating the perfect sauna room for you and your family.

Note: Your sauna shipment will include an all-glass door, though some photos may display a glass wall for reference. Backrests are shipped flat; if you'd like an angled backrest, additional spacers can be easily created on-site to achieve your desired pitch.

Note: Wall boards run in the standard horizontal direction unless room width exceeds 8 ft; in such cases, an interior seam will be added where two boards meet to span the width.

Included Accessories
  • All models come with heater stones included
  • Harvia Virta is the only model in this lineup that includes a protective safety railing

Wellness Benefits — Relax, Recover, Recharge

The Finnish Sauna builders Barrel Sauna is more than a luxury feature—it's a dedicated wellness investment. Regular sauna sessions support:

  • Muscle recovery after physical activity and intense workouts
  • Improved joint mobility and long-term flexibility
  • Toxin elimination through deep, penetrating cleansing heat
  • Stress relief and enhanced mental well-being
  • Quality time shared with family and friends in your own backyard

About Finnish Sauna Builders

Finnish Sauna Builders is a trusted name in premium, thermally modified barrel saunas, proudly rooted in the rich traditions of Finnish sauna culture. Each sauna is built with an unwavering commitment to quality, durability, and authentic wellness—bringing the time-honored Finnish sauna experience directly to your home.

Expert Support Available

Contact your Finnish Sauna Builders Specialist today for personalized guidance in selecting the perfect sauna configuration for your space, lifestyle, and wellness goals.

The Top Sauna Questions Answered for You

Traditional (Finnish) Saunas: Typically operate between 150°F and 190°F (65--88°C), with a median standard between 165--180°F.

Infrared Saunas: Operate at lower, radiant heat temperatures, generally between 120°F and 150°F.

Beginners: Start with 10 to 15 minutes per session.

Advanced: You can stay longer (up to 20 minutes), but it is best done in "innings". Do a 15-minute session, exit to cool down and rehydrate for 5 minutes, and then return for another round. Always listen to your body and exit immediately if you feel dizzy or nauseous.

This is a matter of personal preference. Traditional saunas use heated rocks where you can add water to create steam and instantly increase the humidity. Infrared saunas are run dry without rocks or steam. You can also add essential oils to your water for aromatherapy.

Before: Yes, shower beforehand to rinse off perfumes, lotions, and oils to keep the sauna sanitary and help your skin sweat freely.

After: Yes, rinse off the sweat, salts, and toxins, and help your pores close back up.

Regular sauna use supports:

  • Heart Health & Circulation: Improved vascular function and lower blood pressure.
  • Muscle Recovery: Loosens stiff joints and eases muscle soreness.
  • Detoxification: Flushes heavy metals (like lead, cadmium, and mercury) through heavy sweating.
  • Relaxation & Sleep: Helps lower cortisol and promotes deeper, restorative sleep.
  • Private Saunas: Go completely bare or wrap yourself in a cotton towel.
  • Public/Gym Saunas: Swimsuits or towels are typically required by facility rules.
  • Pro Tip: Avoid wearing metal jewelry as it can heat up and burn your skin, and leave electronics (phones, earbuds) outside—extreme heat damages batteries.
  • Saunas cause significant fluid loss through sweating, resulting in temporary reductions in "water weight". However, it is not a replacement for regular exercise and a proper diet for burning fat.

Traditional Saunas: Heat the air in the room to high temperatures using electric or wood-burning heaters.

Infrared Saunas: Use invisible light spectrum wavelengths to heat your body directly rather than superheating the surrounding air.

  • Proper ventilation is critical so you don't sit in a "suffocation box" with depleted oxygen and high CO₂ buildup. A well-designed traditional sauna has an intake vent near the floor by the heater and an exhaust vent on the opposite wall.

Sauna therapy is generally safe, but you should consult a doctor first if you have underlying cardiovascular conditions, take certain medications, or are pregnant. Never use a sauna if you have a fever, are under the influence of alcohol, or feel lightheaded.

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