Current Thermory Square No. 45 Installation Guide – Rev. 2026-05-18
Current manufacturer No. 45 / K140 assembly guide, visibly revised 2026-05-18.
Extend your entertainment area with the ultimate relaxation destination. The Thermory 45 Series square can bathe one to two people in heat and steam. It’s small footprint and efficient design make it perfect for those with limited space, offering a spa-like escape in the comfort of your home. Plus, the 45 comes with a rain jacket for all-weather protection.
Specs:
| Length: | 4.6′ | Back Bench Length: | 3.9′ |
| Width: | 4.4′ | Back Bench Width: | 1.66′ |
| Height: | 7.28′ | Volume: | 98 CU. FT. |
| Window: | N/A | Heater: | 5KW |
| Side Bench Length: | 2.0′ | Board Thickness: | 1.57″ |
| Side Bench Width: | 0.91′ |
No45 Sauna Square
A personal wellness retreat, beautifully designed for limited spaces.
The No45 Sauna Square brings the traditional Finnish sauna experience to your home in a compact, elegant package. Crafted with Thermory's premium thermally modified wood, this freestanding sauna fits perfectly on balconies, porches, or garden spaces, offering a private sanctuary wherever you need it most.
Design
Compact Luxury
The No45 features clean, modern lines and a panoramic window that creates an open, airy feel while maintaining privacy. The thermally modified Thermo-Spruce exterior and Thermo-Aspen interior not only provide beauty but exceptional durability against the elements.
Perfect for Small Spaces
With dimensions of just 55.5" × 52.4" × 87.4" (L × W × H), the No45 Sauna Square is our smallest sauna, designed specifically for limited spaces without compromising on the authentic sauna experience.
Features
Space-Efficient Design - Fits perfectly in smaller areas like balconies and porches.
Quick Assembly - Easy to set up, bringing the sauna experience to your home faster.
Energy Efficient - Designed to maintain heat effectively, reducing operational costs.
Built for Two - Comfortably accommodates 1-2 people with thoughtfully designed interior benches.
Homecraft Revive Slim 5kW Heater. Want to push temps into the 190°s and beyond? Consider a HUUM STEEL Mini or HUUM CLIFF Mini.
Powerful heating in a compact design, perfect for quickly reaching optimal sauna temperatures.
Premium Weather Protection - Included PVC rain jacket with trim provides additional protection in wet weather conditions.
DIY Friendly - All Thermory Squares are designed for easy DIY assembly with 1-2 people in a day. Want to have it built for you? Contact Sauna Marketplace to see if we have builder in your area.
Specifications
Dimensions
Exterior (L × W × H): 55.5" × 52.4" × 87.4"
Interior: 31.5" × 24.5" × 11"
Door: 47.5" × 20"
Wall Thickness: 1.575"
Packing Dimensions (H × W × L): 31.1" × 43.5" × 82.3"
Volume: 98 Cubic Ft
Materials
Exterior: Thermally modified Thermo-Spruce
Interior, Flooring & Benches: Thermally modified Thermo-Aspen
Technical
Heater: Homecraft Revive Slim 5kW
Weight: 1000 lbs
Shipping Weight: 992 lbs
Assembly: DIY installation (guide included)
Included Components
Manuals
Cradles
Body staves
Wall panels
Panoramic window
Wooden trims
Glass front door with handle
Front panels with glass
Interior benches
Backrest staves
Duckboard flooring
Fasteners
Metal bands
Porch benches
PVC rain jacket with trim
Durability
Your Thermory Sauna Square's thermally modified wood is built to withstand the elements for up to 25 years. The included rain jacket provides additional coverage in wet weather, ensuring your sauna remains beautiful for years to come.
Warranty & Shipping
2-Year warranty
Ships palleted via LTL freight
DIY Friendly, ask about the Sauna Marketplace Builder Network to have it built for you.
Why No45 Sauna Square?
Experience the ultimate in personal wellness with the No45 Sauna Square. Its small footprint and efficient design make it perfect for those with limited space, offering a spa-like escape wherever you need it most.
Prebuilt
Sauna Brushes
Vents