Electrical principles and what your electrician needs
What your licensed electrician needs to quote and install your dedicated heater circuit, plus cost expectations and sequencing.
The Harvia heater requires a dedicated electrical circuit installed by a licensed electrician. The voltage and amperage depend on your model. Do not attempt heater wiring yourself unless you are a licensed electrician.
What your electrician needs to know
- Heater model (varies by sauna; see your model's electrical article in 4.7 to 4.10)
- Heater power rating in kW
- Required circuit voltage and amperage
- Distance from your electrical panel to the sauna location
- Whether you want indoor or outdoor wiring
- Whether your panel has spare capacity (older panels may need an upgrade)
Standard work scope
- Verify panel capacity. If the panel is full or near capacity, plan a panel upgrade before the new circuit.
- Run the dedicated circuit from the panel to the sauna location with the correct voltage and amperage.
- Install an isolation switch near the unit. The isolation switch allows easy hard resets and is a recommended safety measure for sauna installations.
- Install a weatherproof junction box at the sauna location for outdoor installations.
- Connect the heater per the Harvia wiring diagram (included with your sauna documentation).
- Pull permits if required by your municipality and pass inspection.
- Sequencing
- We recommend booking the electrician for the day after your scheduled assembly. Have the cabin assembled, then have the electrician make the final wiring connections to the heater. Alternatively, your electrician can install the rough wiring and isolation switch in advance, then connect the heater after assembly.
For your specific model's electrical requirements, see the next four articles.