Many one- and two-person infrared saunas plug into a standard 120V outlet on a dedicated circuit. Larger infrared cabins and almost all traditional electric sauna heaters need a 240V dedicated circuit sized to the heater, installed by a licensed electrician, often with a permit. Read the installation manual before buying and confirm your panel has capacity.
Power is the first thing to check before you buy a sauna.
Typical requirements
| Sauna type | Typical supply |
|---|---|
| Small infrared cabin (1 to 2 people) | 120V dedicated outlet, often 15 or 20 A |
| Larger infrared cabin | 240V dedicated circuit |
| Traditional electric heater | 240V dedicated circuit, hardwired |
| Wood-fired sauna | No electricity for heat; clearances and chimney rules apply |
Always follow the specific model’s manual.
Planning steps
- Read the installation manual for voltage, amperage and wire size.
- Check panel capacity with an electrician.
- Plan the location: level floor, ventilation, clearance and access to power.
- Budget for electrical work in the total cost.
Outdoor installs
Outdoor circuits need weatherproof fittings and protection. See where to start for budgets, compare sauna blankets and cabins, and review the electric heat wrap checklist. Browse home recovery setup.
Common questions
Can I use an extension cord for a sauna?
No. Sauna heaters draw high current for long periods. Plug directly into a suitable outlet or hardwire as the manual specifies.
What size breaker does a sauna need?
It depends on heater wattage and voltage. The installation manual lists the required breaker and wire size.
Do I need a permit?
Electrical work for a new 240V circuit usually needs a permit in many areas. Your electrician can advise.