Elevate Your Indoor Wellness with Thermory Indoor Saunas
If you're seeking a premium indoor sauna that combines modern design, longevity, and unmatched thermal performance, look no further than the Thermory Indoor Sauna Collection. Offered exclusively at Finnish Sauna Builders, these pre-cut sauna packages are crafted using thermally modified wood, ensuring lasting beauty, durability, and safety in your indoor environment.
From 3’ x 4’ compact saunas to custom-sized builds, Thermory’s range offers something for every space and sauna enthusiast—whether you're outfitting a residential bathroom, luxury spa, or home gym.
Why Choose Thermory Indoor Saunas?
Thermory is an industry leader in sauna innovation, delivering high-performance wood materials that are heat-treated for optimal endurance and aesthetics. Here’s why their indoor sauna kits are top-tier:
✅ Thermally Modified Wood – More stable and durable than untreated wood
✅ Chemical-Free – Modified using only heat and steam
✅ Dimensional Stability – Won’t warp or shrink in humid conditions
✅ Beautiful Finish Options – Choose from Alder, Magnolia, or Spruce
✅ Precision Pre-Cut Kits – For fast, DIY or professional installation
Each sauna package is designed to create a personal sanctuary of relaxation and rejuvenation, while holding up to the demands of consistent indoor use.
Available Wood Options
Thermory’s wood treatments enhance both function and aesthetics. Here’s a breakdown of the top material options in their indoor sauna lineup:
Thermally Modified Alder
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Warm, reddish-brown hue with a soft, even grain
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Low thermal conductivity for comfortable bench seating
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Sustainably sourced and chemical-free
Thermally Modified Magnolia
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Elegant, light tone with subtle natural variation
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Offers a bright, modern Scandinavian look
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Excellent resistance to moisture
Thermally Modified Spruce
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Classic pale Nordic finish
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More budget-friendly without compromising quality
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Excellent for minimalistic and traditional designs
Each wood type is available in multiple pre-cut sauna sizes ranging from 3’x4’ to 8’x8’, with custom options available for larger builds.
Explore the Thermory Indoor Sauna Packages
All sauna packages are made for easy, efficient indoor installation and come pre-measured and pre-cut.
Small Home Saunas – 3' x 4' sauna , 4' x 4'
Perfect for condos, bathrooms, or compact home gyms.
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Minimalist designs for tighter spaces
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Choose from standard or custom heights
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Compatible with smaller electric sauna heaters
Explore our 3’ x4’ indoor saunas
Explore our 4’ x 4’ indoor saunas
Medium Saunas – 4' x 5', 5' x 6', 6' x 6'
A popular choice for couples and families.
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Fits 2–4 people comfortably
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Available in all wood types
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Compatible with Harvia, HUUM & Scandia heaters
Explore our 4’ x 5’ indoor saunas
Explore our 5’ x 6’ indoor saunas
Explore our 6’ x 6’ indoor saunas
Spacious or Commercial Saunas – 6' x 7' to 8' x 9'
Ideal for wellness centers, boutique spas, or large home setups.
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Up to 6–8 person capacity
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Enhanced ventilation and layout
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Combine with commercial sauna heaters
📌 Need something custom? Check out our Custom Sauna Design & Installation Services.
🔧 What’s Included in Each Thermory Sauna Kit?
Each pre-cut Thermory sauna package is built for convenience, offering all the essentials you need to install a complete indoor sauna room.
✅ Pre-Cut Wall & Ceiling Boards
✅ Bench Material & Backrests
✅ Heater Guard, Duckboard & Trim
✅ Door Frame & Optional Glass Door
✅ Installation Instructions
These kits are ideal for contractors and DIYers alike, and our team offers free consultations to help you select the right model.
Compatible Electric Sauna Heaters
All Thermory indoor saunas are compatible with top-rated electric sauna heaters, designed to work efficiently in enclosed indoor spaces.
Top Heater Options:
Want help sizing your heater? Use our Heater Sizing Tool to get the perfect fit.
Upgrade Your Indoor Sauna Experience
Complete your Thermory indoor sauna with luxury accessories for added comfort and ambiance:
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LED Sauna Lighting – Warm ambient lighting & color therapy
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Sauna Buckets & Ladles – Traditional steam control tools
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Aroma Oils & Dispensers – Infuse your session with calming scents
Professional Installation Services Available
Want a turn-key experience? Finnish Sauna Builders offers full-service installation and project management support, ideal for custom or large residential builds.
📞 Schedule a Sauna Consultation to discuss your indoor space, design preferences, and installation options.
Why Buy from Finnish Sauna Builders?
With unmatched selection and expertise, Finnish Sauna Builders is your go-to partner for premium indoor sauna solutions.
✅ Authorized Thermory Retailer
✅ Free Shipping on Select Models
✅ Custom Sizing Available
✅ 0% Financing Options
✅ Expert Support & Install Services
Shop Thermory Indoor Saunas Today
Whether you're designing a compact spa room or adding a luxury retreat to your home, Thermory indoor saunas deliver lasting performance and sophisticated style. Find your perfect sauna today!
Compare Sizes & Wood Types
Financing & Fast Shipping Available
Create your indoor sanctuary with a Thermory Sauna – engineered for beauty, built to last.
