Is this a traditional sauna or an infrared sauna?
Traditional. A Harvia heater warms a bed of stones to high heat, and you can pour water over the stones for loyly, the classic Finnish steam. Infrared cabins run much cooler and heat your body directly. If you want authentic, hot, outdoor sauna, this is that.
What is the difference between the 6kW and 8kW heaters and the WiFi option?
The 8kW heater heats a four-person cabin faster and holds temperature more easily in cold weather; the 6kW is a touch gentler on your electrical service. The WiFi controller lets you preheat from your phone before walking outside, which is genuinely useful in winter, while the built-in controller is a simple, reliable knob on the heater.
How hot does it get, and how long to heat up?
A well-built ThermoWood cabin like this reaches full heat in around 35 minutes, and a traditional Harvia sauna runs about 165 to 190 degrees. It heats slower in cold weather, so the WiFi controller helps you start it early.
What does a sauna session actually do?
Most people use it to relax and unwind. A hot session warms you through and raises your heart rate in a way that feels like gentle exercise, and many find the time afterward calming. Research on sauna suggests it may also support post-exercise recovery. A sauna is a wellness ritual, not a medical treatment.
What electrical does it need?
A 6kW Harvia heater needs a dedicated 240V circuit around 30 amps, and the 8kW around 40 to 50 amps, with weather-rated wiring, proper grounding, and a licensed electrician. Many jurisdictions require a permit and inspection, and GFCI rules vary, so the heater manual and local code govern. Plan this before the sauna arrives.
How durable is ThermoWood outdoors?
ThermoWood is timber heat-treated until it resists moisture, warping, and rot far better than untreated wood, which is why quality thermowood cabins are rated to last 15 to 25 years outside. A cover or roof and basic seasonal care extend it further, and good ventilation keeps mold away.
Is a sauna safe for everyone?
Traditional sauna is generally well tolerated by healthy adults, but the heat is a real cardiovascular load. Check with your doctor first if you have unstable heart disease, a recent heart attack, uncontrolled blood pressure or arrhythmia, or are pregnant. Hydrate before and after, avoid alcohol, start with shorter sessions, and step out if you feel lightheaded.