EOS Cubius S45 Soapstone Sauna Cube Set with Mounting Frame
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Complete the Cubistic Design of Your Mythos S45 Heater
The EOS Cubius S45 set includes 24 precision-cut solid soapstone sauna cubes and a stainless-steel mounting frame developed for the EOS Mythos S45 sauna heater.
Available in Natural, White, or Black, the Cubius stones create a distinctive geometric surface while supporting airflow, balanced heat distribution, and long-lasting sauna infusions.
Geometric Sauna Stones with Functional Heat Performance
Cubius stones are cut from solid soapstone into exclusive cubic forms that complement the architectural design of the EOS Mythos heater. The included frame positions the cubes in an organized, symmetrical arrangement above the heater stone compartment.
Soapstone absorbs and releases heat gradually. The Cubius layout also allows heated air to move through the arrangement, helping support balanced heat distribution and a sustained infusion experience.
- Brand
- EOS
- Model
- CUBIUS S45
- Product type
- Decorative sauna stone set
- Compatibility
- EOS Mythos S45
- Quantity
- 24 soapstone cubes
- Stone material
- Solid soapstone
- Available colors
- Natural, White, and Black
- Mounting frame
- Included
Designed Around the EOS Mythos S45
The complete S45 set combines model-specific fit, solid soapstone, three available finishes, and an included mounting structure.
Complete S45 Set
Includes 24 Cubius soapstone cubes sized as a complete decorative set for the wider EOS Mythos S45 heater.
Solid Soapstone Construction
Each cube is made from solid soapstone, a dense natural material valued for its ability to absorb and gradually release heat.
Model-Specific Compatibility
This 24-piece configuration and mounting frame are intended for the EOS Mythos S45 sauna heater.
Open Geometric Layout
The organized cube arrangement allows heated air to move through the installation while preserving the signature Mythos appearance.
Mounting Frame Included
A special stainless-steel mounting frame is included to secure and organize the standard-height Cubius stones on the heater.
Three Design Options
Choose unfinished Natural soapstone or a specially coated White or Black set to coordinate with the sauna and heater finish.
Choose Natural, White, or Black
All three variants contain 24 soapstone cubes and the S45 mounting frame. The finish and variant SKU change with the selected color.
| Color | SKU | Finish | Set Size |
|---|---|---|---|
| Natural | 14-945521 | Natural solid soapstone without a color coating | 24 pieces |
| White | 14-945939 | Special heat- and scratch-resistant White coating | 24 pieces |
| Black | 14-945943 | Special heat- and scratch-resistant Black coating | 24 pieces |
Natural soapstone may display normal variation in tone, markings, and surface character. These natural differences are not defects.
This Listing Is the 24-Piece Set for the EOS Mythos S45
The S45 Cubius set is designed around the width and upper stone area of the EOS Mythos S45 heater. It should not be confused with the smaller 20-piece Cubius S35 set.
Published Compatibility
- EOS Mythos S45 sauna heater
- Mythos S45 12.0 kW configuration
- Mythos S45 15.0 kW configuration
- Standard-height 24-piece Cubius layout
Verify Before Ordering
- Manufacturer is EOS
- Complete heater model is Mythos S45
- The heater is not the narrower Mythos S35
- The selected color matches the intended design
- The upper mounting area is complete and undamaged
Not the S35 set: The EOS Cubius S35 package contains 20 cubes and uses different color-specific item numbers. Do not select this 24-piece S45 set for a Mythos S35 heater.
Confirm the Heater Model and Color
Read the Heater Label
Confirm that the complete heater model is EOS Mythos S45 rather than Mythos S35.
Select the Color
Choose Natural, White, or Black from the product variant menu before adding the set to your cart.
Confirm the Variant SKU
Verify that the color-specific SKU shown in the cart matches the desired 24-piece Cubius S45 set.
EOS Cubius S45 Specifications
| Manufacturer | EOS |
|---|---|
| Model | CUBIUS S45 |
| Product type | Decorative soapstone sauna cube set |
| Compatible heater | EOS Mythos S45 |
| Number of Cubius stones | 24 |
| Stone material | Solid soapstone |
| Shape | Precision-cut cubic form |
| Available colors | Natural, White, and Black |
| Natural SKU | 14-945521 |
| White SKU | 14-945939 |
| Black SKU | 14-945943 |
| Colored finish | Special heat- and scratch-resistant coating on White and Black variants |
| Mounting structure | Stainless-steel mounting frame included |
| Sauna heater included | No |
| Standard sauna stone fill included | No |
EOS does not publish individual cube dimensions on the supplier listing for this standard-height set. Do not use measurements from special-height or Cubius Loop stones as specifications for this set.
What Is Included?
Included
- 24 EOS Cubius solid soapstone sauna cubes
- Selected Natural, White, or Black color variant
- Model-specific stainless-steel mounting frame
Not Included
- EOS Mythos S45 sauna heater
- Sauna control system
- Power extension equipment
- Required standard sauna stone fill
- Cubius Loop stones
- Special-height Cubius stones
- Sauna fragrance or aromatherapy accessories
- Professional installation or inspection
Decorative top set only: The Cubius cubes do not replace the standard sauna stones required inside the Mythos S45 stone compartment. The heater must be filled and installed according to the current EOS heater instructions.
Install the Frame and Cubes on a Cool, De-Energized Heater
Follow the current EOS Mythos and Cubius installation instructions. The mounting frame must sit securely and the cubes must be arranged so they do not obstruct required heater airflow.
- Disconnect and secure electrical power to the heater
- Allow the heater and all sauna stones to cool completely
- Confirm the heater model is EOS Mythos S45
- Inspect all cubes and the mounting frame for damage
- Verify the standard sauna stone fill is installed correctly
- Position the stainless-steel frame as directed by EOS
- Secure each Cubius stone to its intended frame position
- Maintain open airflow paths through the arrangement
- Confirm no cube is loose or unstable
- Complete a final inspection before energizing the heater
Do not operate with loose or damaged stones. Replace any cracked, unstable, or damaged Cubius cube before operating the sauna heater.
Apply Sauna Water Only as Directed
Use clean sauna water and follow the EOS heater instructions for infusion quantity, frequency, and application. Avoid creating sudden thermal stress or allowing fragrance residue to build up on the cubes.
Use Clean Water
Apply only water suitable for sauna use unless a properly diluted, sauna-approved fragrance product is being used.
Avoid Overpouring
Use moderate quantities according to the heater instructions rather than rapidly flooding the stone surface.
Inspect Regularly
Check the cube arrangement, mounting frame, finish, and underlying stone fill during routine heater maintenance.
Preserve the Cubius Finish and Stable Arrangement
Recommended Care
- Allow the heater and cubes to cool before inspection
- Remove loose dust using a soft, dry method
- Wipe the mounting frame when necessary
- Check each mounting position for stability
- Remove accumulated sauna fragrance residue
- Replace cracked or deteriorated cubes
- Inspect the standard stone fill beneath the Cubius set
Avoid
- Abrasive pads or metal scraping tools
- Harsh or unapproved cleaning chemicals
- Painting or refinishing the soapstone
- Mixing incompatible mounting components
- Operating with loose cubes
- Blocking heater airflow
- Using damaged coated stones
Why Buy EOS Cubius Stones from My Luxury Home Spa?
Authentic EOS Accessories
Shop genuine EOS sauna heaters, control systems, Cubius stones, and model-specific accessories.
Compatibility Assistance
Send us the heater identification information when you need help distinguishing the 24-piece S45 set from the 20-piece S35 set.
Clear Variant Information
Review each color-specific SKU, package contents, compatibility, and installation guidance before ordering.
EOS Cubius S45 FAQ
What is the EOS Cubius S45 set?
It is a 24-piece solid soapstone sauna cube set with a stainless-steel mounting frame for the EOS Mythos S45 heater.
Which colors are available?
The Cubius S45 set is available in Natural, White, and Black.
What are the color-specific SKUs?
Natural is SKU 14-945521, White is SKU 14-945939, and Black is SKU 14-945943.
How many Cubius stones are included?
The EOS Cubius S45 set includes 24 solid soapstone cubes.
Is the mounting frame included?
Yes. The standard-height 24-piece S45 set includes a stainless-steel mounting frame.
What are the Cubius stones made from?
The cubes are precision cut from solid soapstone.
Are the White and Black stones painted?
EOS describes the White and Black editions as having a special heat- and scratch-resistant coating designed not to discolor during normal sauna temperature changes.
Does this set fit the EOS Mythos S35?
No. This listing is the 24-piece set for the Mythos S45. The Mythos S35 uses a separate 20-piece set.
Does the Cubius set replace ordinary sauna stones?
No. The Cubius cubes are a decorative upper arrangement and do not replace the standard sauna stone fill required inside the Mythos S45 heater.
Is the EOS Mythos S45 heater included?
No. This listing includes the 24 Cubius cubes and the mounting frame. The heater, control system, and standard sauna stones are sold separately.
Can I combine different Cubius colors?
EOS presents Cubius stones as a way to create individualized color combinations. Any mixed installation should maintain the correct S45 quantity, mounting method, stability, and airflow.
Are Cubius Loop stones included?
No. Cubius Loop stones and special-height Cubius stones are separate optional accessories.
Do natural soapstone cubes look identical?
No. Natural soapstone may vary in color, pattern, and surface character because it is a natural material.
Should damaged Cubius stones be replaced?
Yes. Do not operate the heater with a cracked, unstable, or damaged Cubius stone.
Verify That Your Heater Is a Mythos S45
Send us the complete model information from your EOS sauna heater when you need help confirming whether you need the 24-piece Cubius S45 set or the smaller Cubius S35 version.
Why Buy From Us
FAQs
Shipping & Delivery
Free shipping available on select orders. White-glove delivery and setup can be arranged at an additional cost in most areas. We'll confirm your preferred date after purchase.
Warranty
Full manufacturer warranty, registered at purchase. Need help with a claim? Our U.S. support team handles it directly with the brand.
Returns
New, uninstalled items can be returned within the brand's policy window. We'll help coordinate pickup and any restocking requirements.
Installation & Power
Most saunas/hot tubs require dedicated circuits. We provide spec sheets and can recommend licensed installers in your area.
