Harvia AC3020 Split Face Sauna Heater Stones 33 lbs

Harvia AC3020 Split Face Sauna Heater Stones are designed for traditional sauna heaters that require larger, angular stones to support strong heat retention and responsive steam production. Sized at 10–15 cm, these stones are intended for use in heaters that specify larger stone dimensions, where proper airflow, durability, and heat stability are essential to consistent sauna performance. Supplied as a purpose-built sauna accessory, they are selected specifically for high-temperature sauna environments.

The split face (angular) shape of the AC3020 stones allows them to stack securely while maintaining airflow channels between stones. This structure supports efficient heat circulation inside the heater and enables water thrown onto the stones to vaporize rapidly on contact, producing a more direct and vigorous steam response. Angular stones are commonly used as the primary stone fill in sauna heaters, particularly where firm stacking and heat storage are required to meet the heater’s intended operating characteristics.

Manufactured from olivine diabase, these sauna stones are chosen for their ability to withstand repeated heating and cooling cycles without cracking prematurely. Olivine diabase is widely used in sauna applications due to its density, thermal stability, and suitability for sustained high temperatures. These properties help the stones maintain consistent performance over time when installed and maintained according to heater guidelines, including periodic inspection and replacement as part of normal sauna care.

The 10–15 cm stone size makes the Harvia AC3020 stones suitable for larger heaters and stone compartments that are designed to accommodate bigger stones. Using stones that match the heater’s specified size range is critical to ensuring proper airflow, preventing overheating of heating elements, and supporting even heat distribution throughout the sauna room. Incorrect stone sizing can restrict airflow or reduce heater efficiency, which is why purpose-matched stones like the AC3020 are an important component of a well-functioning sauna system.

Harvia develops sauna accessories to integrate seamlessly with traditional sauna heaters, focusing on functional reliability rather than decorative features. The AC3020 split face stones are intended for sauna users who value predictable heat behavior, strong steam response, and components designed specifically for sauna use. These stones are suitable for replacing worn stones or configuring a new heater installation where larger, angular stones are required.

Whether used in electric or wood-burning sauna heaters that accept this size range, the Harvia AC3020 stones provide a practical solution for maintaining heater performance and supporting the authentic sauna experience. Proper stone selection and arrangement directly influence how a sauna heats and how steam is produced, making these stones a foundational element of long-term sauna ownership.