Saunum Heater Stones Sauna Heater Stones, Rounded Olivine, 5-10cm, 33lbs

Saunum Sauna Heater Stones — Rounded Olivine Diabase, 2″–4″, 33 lb Box

The stones you load into your heater have a real effect on how your sauna feels. Saunum’s heater stones are cut from olivine diabase — the classic Finnish sauna stone — chosen for its density and high heat capacity. The stones absorb heat evenly, hold it long, and release a soft, consistent steam when you ladle water over them.

Each 33 lb box contains rounded stones in the 2″ to 4″ (5–10 cm) range, the size recommended for Saunum Air series and most residential electric heaters. The rounded shape lets air circulate freely between the stones, which protects the heating elements and keeps steam quality high. They arrive pre-washed and ready to stack — no rinsing or sorting required.

Replace your sauna stones every one to two years of regular use to keep steam quality at its best.

Key Specifications

• Stone type: Olivine diabase
• Size: 2″ – 4″ (5–10 cm), rounded
• Box weight: 33 lbs
• Preparation: Pre-washed, ready to use