What You Get
Everything you need — build it yourself or hire locally
Complete Handbook
200+ page guide with material lists, dimensions, and step-by-step instructions. Share with a builder or follow along yourself.
3D Configurator Access
Design your layout in real-time, swap modules, and export your bill of materials.
Lifetime Updates
Every handbook improvement, delivered free forever with Lifetime or Founder tier.
Community
Join makers and homeowners worldwide sharing tips, progress photos, and project stories on Discord.
How It Works
Design
Use our free 3D configurator to design your perfect layout.
Plan
Get detailed build plans, materials lists, and step-by-step guides.
Build
Build it yourself with the handbook, or get quotes from local builders to handle the work.
Why Thiosphere?
Open Source
CERN Open Hardware License. Study it, modify it, build it, sell it — just share your improvements.
22 Module System
Roof panels, windows, doors, walls, corners — every piece interchangeable, every configuration unique.
Any Function
Sauna, office, greenhouse, studio, shop — one platform, endless possibilities.
Technical Specifications
| Diameter Options | 10 ft / 12 ft / 14 ft |
| Footprint | ~160 sq ft (fits a standard parking space) |
| Interior Height | 7 ft at working level, 10 ft at peak |
| Modules | 22 interchangeable (roof, wall, window, door, corner) |
| Foundation Options | Plinth, trailer, or casters (removable) |
| Build Time | 40 - 60 hours (3 - 4 weekends) |
| Materials Budget | $3,000 - $5,000 |
| License | CERN Open Hardware License v2 |
Engineering Views
Get Build Plans
Complete handbook with step-by-step instructions, materials lists, and CAD files. Starting at $29.
See Pricing & Editions30-day money-back guarantee. Open-source license included.
Get Quotes from Local Builders
Design your configuration in our free online tool, then get material quotes from suppliers near you.
Design & Get QuotesFrequently Asked Questions
OPEN SOURCE HARDWARE
The Thiosphere™ SDK, the foundation to all our products, is open source hardware. In fact, all Thios products are. Specifically the CERN Open Hardware Licence Version 2 - Strongly Reciprocal.
That's a fancy way of saying that if you want to use our design, even for commercial purposes, you have to share your changes with everyone else.