☆ Irish-based sauna specialist ☆ Founder-led · 15 years project experience ☆ Personal advice & local support
☆ Irish-based sauna specialist ☆ Founder-led · 15 years project experience ☆ Personal advice & local support
39.00€
Harvia sauna stones made from high-quality olivine diabase, designed for excellent heat storage and authentic Finnish sauna steam. The 5–10 cm angular stones are ideal for electric sauna heaters and as a top layer in wood-burning sauna stoves, ensuring efficient heat distribution and good airflow.
Stone size: 5–10 cm
Weight: 20 kg box
In stock
High-quality Harvia olivine diabase sauna stones designed to deliver authentic Finnish sauna performance. These angular 5–10 cm stones provide excellent heat storage, efficient steam production and optimal airflow, making them ideal for electric sauna heaters and as a top layer for wood-burning sauna stoves.
Mined in Western Finland, Harvia’s dark grey olivine diabase is renowned for its exceptional durability, high density and excellent thermal conductivity. The stones withstand repeated heating and cooling cycles while maintaining their structure and heat-retaining properties for years of reliable use.
The natural split-face surface stores large amounts of heat and allows water to vaporise quickly across the broad fracture surfaces, creating rich, soft and long-lasting steam. Their angular shape also makes the stones easy to stack while ensuring good air circulation, helping your sauna heater operate efficiently.
These 5–10 cm sauna stones are suitable for most electric sauna heaters and are also recommended as the top layer in many wood-burning sauna stoves. For the best performance, always use the stone size specified in your heater manufacturer’s instructions.
Before first use, rinse the stones with clean water to remove any dust. Stack the stones loosely in the heater to allow sufficient airflow between them. Proper placement improves heating efficiency and helps produce consistent and even sauna steam.
Stones with a size of 5–10 cm are typically used in electric sauna heaters, where good airflow between the heating elements is important. For wood-burning sauna stoves, larger stones (10–15 cm) are often recommended because they provide greater heat storage and slower heat release.
This product is available for collection only from Polaris Sauna in Greystones, Co. Wicklow. Due to the weight of sauna stones, we currently do not offer shipping for this item. Collection can be arranged by appointment after purchase.
Sauna stones are a natural product and may vary slightly in shape and colour. Small surface cracks can occur during heating and cooling cycles and are normal during sauna use. Before first use, rinse the stones with clean water to remove any dust. Stack the stones loosely in the heater to allow sufficient airflow between the stones.
To maintain optimal sauna performance, sauna stones should be checked regularly and replaced if they become heavily cracked or start to crumble after extended use.
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