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We highly recommend using rounded stones in HUUM heaters to complement the design and have milder steam. In our selection, we have rounded olivine diabase stones in two different size ranges:  5-10 cm, and 10-15 cm. The stones are durable and have high heat capacity. You can also use other types of stones in HUUM heaters, except decorative stones because they can break easily.

  • diameter 5-10 cm – 15 kg package
  • diameter 10-15 cm – 20 kg package


Find out how many stones and in which size are needed for each HUUM sauna heater model.

  • DROP 4,5
  • 60kg (5-10 cm)
  • DROP 6
  • 60kg (5-10 cm)
  • DROP 9
  • 60kg (5-10 cm)
  • HIVE 6
  • 120 kg (10-15 cm) + 30 kg (5-10 cm)
  • HIVE 9
  • 120 kg (10-15 cm) + 30 kg (5-10 cm)
  • HIVE 12
  • 220 kg (10-15 cm) + 30 kg (5-10 cm)
  • HIVE 15
  • 220 kg (10-15 cm) + 30 kg (5-10 cm)
  • HIVE 18
  • 220 kg (10-15 cm) + 30 kg (5-10 cm)
  • HIVE Wood 13
  • 90kg (5-10 cm)
  • HIVE Wood 17
  • 100 kg (10-15 cm) + 30 kg (5-10 cm)
  • HIVE Wood 17 LS
  • 100 kg (10-15 cm) + 30 kg (5-10 cm)
  • HIVE Heat 12
  • 90 kg (5-10 cm)
  • HIVE Heat 12 LS
  • 90 kg (5-10 cm)

Choose your stones wisely

Throwing water on the stones is how you regulate heat and steam in the sauna. The shape, size and composition of the stones and the way they are arranged make all the difference. We recommend rounded stones because they provide a milder steam. Thanks to the rounded shape the water can reach inner layers of stones and evaporate gradually instead of evaporating all at once from the top layer. Since they are very visible in HUUM heaters, you need both smaller and bigger stones to avoid big noticeable gaps. We also suggest laying smaller stones and more close together on the top to accumulate the heat better.

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    What is best for your sauna?

    To find out which sauna heater is suitable for you, please insert below the requested information and preferences about your sauna. What are the dimensions of your sauna room? Do you prefer your heater installed on the floor or on the wall? Would you like to control your sauna only from the control unit or also use the remote control function through the mobile app?
    Dimensions of sauna (m)
    Multiply the height by the width and the length in meters.
    Do you have a glass door?
    Glass door adds + 1,5 m² to your sauna volume.
    Non-insulated walls (m )2
    In case there are any uninsulated brick, tile, glass or log walls in the sauna room, an additional volume of 1.5 m³ for each m² of such wall should be added to the sauna room size calculation.
    Type of sauna
    Do you prefer electric or wood-fired sauna?
    Heater location
    Choose the location of your sauna heater.
    Heater control
    How would you like to control your sauna?

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