Made in Sweden for the Nordic climate

What is the monthly cost of a hot tub?

terrassebassenget som har plass til alle vennene dine

Energy consumption for our spa baths and terrace pools

How much a bath costs in energy consumption differs depending on how much and how long you bathe. There is also a large variation in electricity consumption depending on the season.

We have developed our insulation packages with a focus on as low electricity consumption as possible. This means, for example, that it takes over a month (we gave up the measurement after a month and then the water temperature was 14 degrees) for a Pacific (2500 liters) to go from 38 degrees to 10 degrees in the middle of winter. This means that our insulation packages trap the heat in the water effectively.

Consumption data for electrically heated spa bath

In our tests with a Pacific spa with a 3 kW heater and full insulation, set to 39 degrees in an outdoor temperature of -10 degrees, the spa had lost one degree after an hour of use. After two hours of use, the spa had lost another half a degree and was down to 37.5 degrees. In this case, a 6 kW heater would have worked better to maintain the temperature while using the spa. Alternatively, if one is willing to accept a slight temperature drop, a 3 kW heater could work well.

  • During the summer months, most of our customers with full insulation and a technology box turn off the heat of their spa. The insulation of the spa is good enough to maintain a comfortable water temperature with the help of the sun’s heat and the heat emitted by the pump. In some cases, it may be necessary to lift the lid of the technology box to let out the heat. When only the pump is running for cleaning (8 hours a day), the spa consumes 1.5 kWh per day.
  • At -10 degrees outside and a water temperature of 39 degrees, a Pacific spa consumes 10 kWh per day, while a Grand spa consumes 9.2 kWh per day.
  • At -1 degree outside and a water temperature of 39 degrees, a Pacific spa consumes 8.6 kWh per day, while a Grand spa consumes 6.7 kWh per day.
  • At +5 degrees outside and a water temperature of 39 degrees, a Pacific spa consumes 6.9 kWh per day, while a Grand spa consumes 5.4 kWh per day.

During these measurements, the spas were set to Ready mode, which means that the spa constantly maintained the set temperature of 39 degrees. Since most people do not use the spa multiple times a day, it is possible to set the spa to Rest mode and allow it to drop a degree occasionally, thereby reducing energy consumption further.

terrassepoolen, der kan rumme alle dine venner

Consumption on spa baths during one year

We have started a measurement where we measure exactly what our hot tubs consume during all months of the year. We started measuring consumption in January 2022, and therefore data will be added as we go along. During the month of January, we performed some temperature increases and decreases and other measurements of the water temperature, so the exact consumption measurement started in March. The measurement was carried out outdoors in Gävle, Sweden.

Grand, approx. 1800 liters

  • March: 215 kWh
  • April: 177 kWh
  • May: 172 kWh
  • June: 103 kWh
  • July: 97 kWh
  • August: 108 kWh
  • September: 132 kWh
  • October: 158 kWh
  • November: 185 kWh
  • December: 247 kWh

Pacific, approx. 2500 liters

  • March: 317 kWh
  • April: 264 kWh
  • May: 195 kWh
  • June: 125 kWh
  • July: 110 kWh
  • August: 133 kWh
  • September: 183 kWh
  • October: 219 kWh
  • November: 257 kWh
  • December: 344 kWh

Do you earn by raising and lowering the temperature when you are not bathing?

If you keep the hot tub at the same temperature all the time, we have measured that it doesn’t matter in terms of consumption cost whether you have a 3 or 6 kW heater. However, if you only use the hot tub on Fridays, for example, and turn off the heater during the days in between, a 6 kW heater is preferred as it heats the water faster and consumes a few kW less if the measurement is spread out over a week.

Measurement performed on a Pacific, 2500 liters, in sub-zero temperatures:

  • In our measurements, it took 26 hours to go from a water temperature of 14 degrees to 39 degrees with a 3 kW heater.
  • The hot tub consumed 66 kWh during these hours. It took 20 hours to go from 14 degrees to 39 degrees with a 6 kW heater, and it consumed 61 kWh.
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