Indoor vs Outdoor Sauna: How to Choose the Right Location
Short answer: choose the location first, then the sauna. An indoor sauna needs a room with enough floor and ceiling, a suitable circuit and a route for the cartons. An outdoor sauna needs a level, load-bearing base, power run to the site and a cabin its manufacturer documents for outdoor use. The model's rating settles the question: a cabin listed as indoor only is not an outdoor sauna with a cover on it. Compare ratings in our infrared sauna collection and our full-spectrum sauna collection.
Indoor vs outdoor sauna at a glance
| Question | Indoor | Outdoor |
|---|---|---|
| What limits the size? | Room floor area, ceiling height, doorways on the way in | Yard space, setbacks and the size of the base |
| What does it stand on? | A level, dry interior floor | A level, solid, load-bearing base such as a poured pad or a properly built deck |
| Power | A circuit that meets the manufacturer's requirement, near the cabin | A circuit run to the site by an electrician |
| Weather | Not a factor | The cabin must be documented for outdoor use |
| Permissions | Lease or building rules | Local building department, and any homeowners' association rules |
| Upkeep | Interior wood and glass | Interior plus an exterior exposed to sun, rain and temperature swings |
Start with the model's rating
Manufacturers state where each cabin may be installed. Three examples from our range show how different those ratings are.
- Indoor only. The Dynamic Gracia far infrared cabin is listed for indoor use only, on 120V / 15A service.
- Indoor or outdoor. The Nora hybrid has an all-weather exterior and is listed for either. Its documentation calls for a 240V / 30A dedicated circuit and a certified electrician.
- Outdoor model. The Carinthia hybrid is documented by its manufacturer as an outdoor model, on a dedicated 240V / 40A circuit.
Figures are from the manufacturer documentation reflected on each Wellari product page. Notice that the rating and the electrical requirement travel together. In these examples the indoor cabin is the one that runs on household voltage.
When indoor makes sense
Indoor suits you if you have a spare room, home gym or finished basement and want to use the sauna in any weather without going outside. The work is mostly measuring: floor area, ceiling height, the clearance the manual requires and every doorway and stair between the curb and the room. Our infrared sauna setup checklist covers that in order.
Indoor is the wrong answer if the only free space is too low, too narrow to assemble panels in, or cannot be given the circuit the model needs.
When outdoor makes sense
Outdoor suits you if the house has no room to spare, or you want a larger cabin than any room will take. Plan for three things before you choose a model.
- The base. Outdoor cabins are heavy. The Nora is listed at approximately 925 lb assembled, and the manufacturer calls for a level, solid, load-bearing base. A panel cabin relies on square alignment to seal, so an uneven or soft base is a problem from day one.
- Power to the site. Have a licensed electrician price the run before you order. Electrical work must follow the code adopted where you live, which in the United States is based on NFPA 70, the National Electrical Code.
- Delivery. The Nora ships as nine cartons, approximately 1,175 lb on a pallet, delivered to the curb. Getting it from there to the base is your job.
Ask your local building department whether a permit or setback applies. For how a sauna fits into a wider yard plan, see our outdoor planning guide.
Wood and weather
Wood takes up and gives off moisture as the air around it changes, and exposed wood weathers. The U.S. Forest Service's Wood Handbook is the standard reference on how wood behaves in service. For a buyer, the practical point is to follow the manufacturer's care instructions for the exterior finish and to expect more upkeep outside than in. Our articles on sauna maintenance and hemlock versus red cedar go further.
Five questions that decide it
- Where is there a level surface that can carry the cabin's assembled weight?
- Can the circuit the model requires reach that spot, and at what cost?
- Can the cartons get there?
- Is the model you want rated for that location?
- Does anyone else, such as a landlord, an association or the building department, have a say?
Frequently asked questions
Can an indoor sauna be used outdoors?
Not unless the manufacturer rates it for outdoor use. A cabin listed as indoor only should be installed indoors.
Is an outdoor sauna harder to install than an indoor one?
It usually involves more site work: a base, a power run and moving a heavy palletised shipment across the yard. How much depends on the model and the site.
Do I need a permit for an outdoor sauna?
Rules vary by location. Ask your local building department before you order, and check any homeowners' association rules.
Can a sauna go in a garage?
A garage is indoors only if it meets the manufacturer's installation conditions for that model. Check the manual for the permitted environment, the floor and the electrical requirement.
