Faqs | Sauna | Heater & Electrical

All electrical wiring must be performed by a qualified and licensed electrician with complete knowledge of local codes and regulations. Costs of hiring an electrician can vary greatly depending on several factors such as your sauna’s distance from your electrical service box, the state you live in, and the cost of materials. We recommend you get quotes from 2 to 3 different licensed electricians before you begin the installation.

Our sauna heaters require 240v and must be hardwired to your electrical panel.

Manual Control Heaters

6kW Harvia manual control heaters require a standard two-pole 30-amp breaker and 10/2 wire, unless they are positioned more than 90 feet from the breaker in which case they will require 8/2 wire.

8kW Harvia manual control heaters require a standard two-pole 40-amp breaker and 8/2 wire.

9kW Harvia manual control heaters require a standard two-pole 45-amp breaker and 8/2 wire.

Digital Control Heaters (Wi-Fi)

6kW Harvia Wi-Fi heaters require a standard two-pole 30-amp breaker and 10/2 wire (10/3 if installing a light), unless they are positioned more than 90 feet from the breaker, in which case they will require 8/2 wire or 8/3 if installing a light.

8kW Harvia Wi-Fi heaters require a standard two-pole 40-amp breaker and 8/2 wire or 8/3 if installing a light.

9kW Harvia Wi-Fi heaters require a standard two-pole 45-amp breaker and 8/2 wire or 8/3 if installing a light.

10.5kW Harvia Wi-Fi heaters require a standard two-pole 50-amp breaker and 6/2 wire or 6/3 if installing a light.

9kW HUUM Wi-Fi heaters require a standard two-pole 50-amp breaker and 8/2 wire or 8/3 if installing a light.

Your electrician will drill a hole in the wall of the sauna below the heater for the conduit. All of the wires will come into the sauna through this hole. In a barrel sauna, it can also come up through the floor below the heater.

Use copper wire with 90C insulation. Do not use aluminum wire to make the connection. Consult with an electrician so you can determine the requirements for your particular situation. All wiring must conform to all national, state, and local codes and regulations.

Because our heaters run on 240v, they are quite energy efficient and should not be a significant drain on your electricity bill.

For manual control heaters, the interior sauna light will require a separate 120V power line, and a switch must be wired in-line. The light switch can be installed wherever is convenient for your property; however, the switch cannot be inside the hot area of the sauna.

For digital Wi-Fi heaters, you do not need to run a secondary 120v line for the sauna light. When wiring a digital Wi-Fi heater your electrician will run a single 240v line from your panel to the Power Unit that comes with the heater. The Power Unit has different voltage outputs which will feed both your sauna heater and the sauna light. The sauna light will be controlled from your digital touchpad and/or myHarvia App.

Our Harvia heaters are made in Finland by Harvia, the world's leading sauna heater manufacturer.

Harvia heaters are considered the gold standard and we import our heaters directly from Europe, where they are subject to strict safety and quality standards.

HUUM sauna heaters are manufactured by HUUM in Estonia, a country known for high quality saunas and heaters.

All our sauna heaters are certified for use in the United States.

Our heaters are hardwired. They must be directly connected to a power source by a qualified and trained electrician.

The unique mounting requirements of the different heaters means that each sauna design is only compatible with certain heater types. For example, the only heater that mounts compatibly in our Extra Wide Barrels is the KIP heater family.

In our larger saunas, an 8kW or higher wattage heater is advised so we do not offer the 6kW heater as an option.

Yes, all of the Harvia electric sauna heaters we carry, except for the Spirit, require special adjustments to be able to perform at their best in altitudes above 4,000 feet.

The Harvia Spirit Heater cannot be calibrated for elevation over 5,000 feet.

Please contact Redwood Outdoors customer support or sales staff for further details if your property is located above 4,000 feet from sea level for addressing concerns, managing expectations, and troubleshooting.