Infrared saunas use infrared heaters to emit light that is absorbed by the skin, warming the body directly. Unlike traditional saunas that heat the air around you, infrared saunas provide a more direct and efficient heating method. They are generally more energy-efficient than their traditional counterparts, but they still consume electricity, which is where the cost comes in.
Factors Affecting the Cost of Running an Infrared Sauna
- Power Consumption (kW Rating)
Power consumption is the first factor determining how much it will cost to run an infrared sauna. Most home infrared saunas typically range from 1 kW to 2.5 kW in terms of power usage. The higher the power rating, the more electricity the sauna uses per hour. - Electricity Rates in Your Area
The cost of electricity varies depending on your location and your energy supplier. In the UK, the average price of electricity is typically measured in pence per kilowatt-hour (p/kWh). As of 2025, the UK’s electricity cost is approximately 27.35 pence per kWh. However, this can fluctuate based on factors such as energy tariffs and wholesale price changes. - Usage Duration
The amount of time spent in the sauna directly impacts the running cost. Most people use an infrared sauna for 30 to 60 minutes per session, and the cost will vary depending on how long the sauna is switched on.
Cost of Running an Infrared Sauna for One Hour
To estimate the average cost of running an infrared sauna in the UK, we can use a simple formula:
Cost = Electricity Rate (p/kWh) x Power Consumption (kW) x Duration (hours)
Let’s break it down with an example.
Scenario:
- Power Consumption: 1.5 kW (a typical medium-sized infrared sauna)
- Electricity Rate: 27.35 pence per kWh (current UK average)
- Usage: 1 hour
Cost = 27.35 p/kWh x 1.5 kW x 1 hour
Cost = 0.41025 or approximately £0.41 for 1 hour
So, running a 1.5 kW infrared sauna for one hour will cost around 41 pence.
Monthly and Annual Running Costs
If you plan to use your infrared sauna regularly, estimating the monthly and annual running costs is helpful. Let’s assume you use the sauna for 5 sessions per week, each lasting an hour.
Monthly Cost Estimate:
- 5 sessions per week x 4 weeks = 20 sessions per month
- 20 sessions x £0.41 = £8.20 per month
Annual Cost Estimate:
- 20 sessions per month x 12 months = 240 sessions per year
- 240 sessions x £0.41 = £98.40 per year
So, using a 1.5 kW infrared sauna for 1 hour, 5 times per week, would cost approximately £8.20 per month or £98.40 per year. These costs could vary slightly depending on the exact energy consumption of the sauna and any fluctuations in electricity prices.
Factors That Could Impact Running Costs
- Sauna Size and Power Rating
Larger saunas or those with more powerful heaters (e.g., 2 kW or 2.5 kW) will naturally consume more electricity and thus cost more to run. Always check the power rating of your specific sauna model before estimating costs. - Energy Tariffs
Your energy supplier’s tariff can affect your running costs. Fixed-rate tariffs offer predictable pricing, but variable tariffs might change over time, potentially increasing the cost of running your sauna. Some suppliers also offer off-peak rates, which could lower costs if you use the sauna during certain times of the day. - Insulation and Efficiency
A well-insulated sauna that retains heat efficiently will require less energy to maintain the desired temperature. Ensure that your sauna is properly maintained to avoid unnecessary energy wastage.
Tips for Reducing Running Costs
- Use a Timer: Many infrared saunas come with built-in timers, allowing you to set the sauna to turn off automatically after a set time. This can prevent you from accidentally leaving the sauna running longer than needed.
- Use During Off-Peak Hours: If your energy provider offers lower rates during off-peak hours, try using your sauna to save money.
- Maintain Your Sauna: Regular maintenance and cleaning can ensure that your sauna operates efficiently and prevent issues that could increase energy consumption.
