The Embers — Finnish Sauna Heater Stones (20 kg)

Authentic peridotite sauna stones — the same volcanic rock used in Finnish saunas for centuries. The Embers hold heat, release steam evenly, and won't crack under repeated 200°C cycles. Why You'll Love It Premium peridotite — dense igneous rock with high thermal mass Hand-split, not tumbled — irregular surfaces maximize airflow and steam burst (löyly) Pre-washed & ready to use — no dust, no rinsing required Universal fit — works with Harvia, Tylö, Huum, and most electric or wood-fired heaters 5–10 cm sizing — ideal balance of heat retention and stacking density Specs Stone type: Peridotite (olivine) Stone size: 5–10 cm (2–4 in) Weight: 20 kg (44 lb) per box Heater coverage: Fits most 6–9 kW heaters Lifespan: Replace every 1–2 years with regular use How to Use Stack loosely around heating elements — never pack tight. Airflow is what creates the signature löyly burst when you ladle water on. Essential for The Wildfire and any traditional sauna heater.