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Harvia 3" - 6" Gray Natural Split Face 44 lbs Electric Sauna Heater Stones

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The Harvia AC3020 stones are 10-15cm in size and designed for use with Harvia sauna heaters and stoves.

Olivine diabase sauna heater stones are the most common and used sauna stones for all heater types and is a subvolcanic rock mined in Western Finland. This traditional stone type is durable in structure and thanks to its high density, it stores and releases heat well. This guarantees perfect steam for sauna.

Sauna stones are often overlooked but remain one of the most important parts of the sauna. Appropriate quality, size, and placement of stones in the heater can have a significant effect on the heat retention and steam generation in the sauna.
Harvia heater stones fit to all sauna heaters – guaranteed by our constant quality control with the Geological Survey Institute of Finland. For this reason, our stones are always safe, clean, and ready to use – worldwide.

Sauna stones must be quarried and selected carefully to pass quality control, which confirms they are safe under intense heat and do not release any emissions. Harvia sauna stones are known to be safe under the intense temperatures of the sauna and retain heat for maximum efficiency.

All stones are thoroughly hand-selected and pre-washed so that replacing them is made easy every time. Prioritizing sustainability, stones that don't meet the quality standards are repurposed for construction and other industries.

Annual Replacement of Sauna Stones

  • extends the lifetime of the sauna heater

  • saves energy

  • saves the sauna interior

  • guarantees the best sauna bath and steam experience

Genuine, high-quality sauna stones are available in different sizes for all heaters. Along with the traditional olivine diabase, different varieties are available, including Heat Treated Elite, Dark Vulcanite, Rounded Olivine Diabase, and Decorative Snow-White and Red Granite sauna stones. Read more about these different stone types below.

Olivine Diabase Sauna Heater Stones

Olivine diabase sauna heater stonesare the most common and used sauna stone for all heater types and is a subvolcanic rock mined in Western Finland. This traditional stone type is durable in structure and thanks to its high density, it stores and releases heat well. This guarantees perfect steam for sauna.

What’s Included

  • 44 lbs of split-face (10-15cm) sauna stones


  • Easy to stack
  • Enable good air circulation
  • Dimensions: 10cm Width x 15cm Height
  • Traditional angular sauna heater stones with high quality
  • For large electric heaters and to all wood-burning heaters
  • Split-face stones store plenty of heat, making the water thrown onto them vaporise efficiently on the broad fracture surface
  • The split-face stones are easy to stack and enable good air circulation
  • Excellent heat storage capacity, durability and thermal conductivity
  • Color and stone species: Dark gray olivine diabase
  • Stone size 10-15 cm and box weight 20 kg (44 lbs)
  • Does not contain harmful ingredients
  • Check the right stone size for your heater from the heater manual


    Color Grey
    Main Material Stone
    Use environment Interior - wet area


    Net weight (kg) 44 lbs (20 Kg)


    EAN 6417659005913
    Electrical number (STK) 8260796
    Customs tariff number EU 25161100
    Customs tariff number RU 25161100
    ETIM number EC001885
    UNSPSC number 40101800
    Content of delivery (listed) Stones
    Product unit (pcs, meters etc.) pcs
    Sales unit Pcs
    Quantity 1
    Packaging materials Cardboard
    Package height 150 mm (5.90")
    Package width 290 mm (11.41")
    Package depth 400 mm (15.75")
    Gross weight 20 kg
    Sales lot 2 Quantity 60 kg



    About Harvia

    Harvia is a global leader in the sauna and spa market. We want to provide relaxing experiences and natural wellbeing to people whether at home or at public sauna and spa premises.

    Saunas and spas are provoking increasing interest around the world. This reflects the global wellness trend that continues to gain traction. The proven health effects of saunas and the improving buying power of the global middle class feed into the increase in saunas all over the world.

    Harvia has a comprehensive sauna and spa product range, from heaters and their components to full sauna and spa solutions – meeting the needs of consumers and industry professionals alike.


    Healing with Heat. Our passion is to share the healing heat of sauna with the world, making it accessible for all to experience Relaxing Moments and Natural Well-being.


    We aim to be the global leader in the sauna & spa industry with complete offerings for professionals and consumers. We are known for our profound insight into the sauna experience across all sauna types and cultures. Our passion is to be the innovation and sustainability leader of our industry, and an active participant in industry consolidation.


    During 70 years harvia has evolved from a finnish sauna heater manufacturer into an acclaimed global sauna and spa brand.

    Frequently Asked Questions