Sauna electrical requirements: 120V or 240V?
The five kinds of connection home saunas use, how to tell which outlet you have, and what the electrical work usually costs.
Check the wiring before the floor space. In our database of 51 saunas, only 16 plug into a normal wall outlet. The rest need a dedicated circuit, and 21 need 240V.
| Plug | What it is | Saunas here | Typical electrical work |
|---|---|---|---|
| A normal 120V wall outlet | 16 | None | |
| A dedicated 120V / 20A outlet | 12 | $100–300 if you need a new outlet | |
| A dedicated 120V circuit above 20A | 2 | $100–300 if you need a new outlet | |
| A 240V outlet on its own circuit | 10 | $300–1,500 for a new circuit | |
| 240V wired in by an electrician | 11 | $300–1,500 for a new circuit |
Cost ranges are rough planning numbers from Sun Home's installation guide, not quotes. Distance from your panel and whether the panel has room for a new breaker move the price most.
How to tell which outlet you have
- Normal 15A outlet: two vertical slots and a round ground hole. The breaker reads 15.
- 20A outlet (NEMA 5-20): one slot has a sideways T. The breaker reads 20.
- 240V outlet: horizontal or angled slots, like a dryer or welder outlet. A locking outlet has curved slots you twist the plug into.
Rules makers agree on
- Give the sauna its own circuit, even when it plugs into a 15A outlet. If a heater or fridge shares the breaker, it can trip mid-session.
- Never use an extension cord or power strip. Sun Home says so for every model in its electrical guide.
- Outdoors, the outlet must be GFCI-protected and weatherproof, and the cord has to reach it as shipped.
- Stove-and-stones heaters above about 2 kW are wired in, not plugged in, by a licensed electrician.
Every model page on Saunafit shows the plug the sauna needs. See the saunas that need no electrician.