Black Vulcanite Sauna Heater Stones 2-4 In, 44 lbs | Harvia

Black Vulcanite Sauna Heater Stones 2-4 In, 44 lbs bring exceptional heat storage and striking visual appeal to both electric and wood-burning sauna heaters. Formed from volcanic material nearly two billion years old, these stones are naturally resilient, allowing them to withstand repeated high-temperature cycles without fracturing. Their 2–4 inch size supports easy, secure stacking that promotes proper airflow through the heater cavity, helping the unit warm efficiently and deliver steady, balanced steam. When wet, the stones turn a deep black, creating a dramatic contrast that enhances the look of the heater while contributing to smooth, consistent löyly. Suitable for use as a full load in electric models or as a high-performance top layer in wood-burning heaters, Black Vulcanite Sauna Heater Stones 2-4 In, 44 lbs provide durable heat retention, reliable steam production, and an elevated overall sauna experience.

Flat-rate delivery of £274 covers every product and accessory to any UK mainland address; orders over £5,000 ship free. We process orders in 1–3 working days and the courier takes 3–6 working days. Large items come on a pallet and we phone to book a delivery day.

You can cancel within 14 days of delivery under the Consumer Contracts Regulations. Returns are processed within 7 working days of the goods arriving back with us. Read the full shipping policy and returns policy.