Heat treated and heavy duty. Made of olivine diabase which has been exposed to temperatures above 1800°F which changes the stones microstructure to increase durability, giving them a longer service life than untreated rocks.

• Ideal for commercial, public, or frequently used saunas, these stones are made to be exposed to higher heat for longer periods of time and heavy steam sessions will not crack or break them.
• Stores heat effectively and releases that heat evenly, thanks to the stones' unique crystalline structure, making it the ideal choice in traditional Finnish saunas.
• A soft, pleasant steam. The split face surface and micropores vaporize water more efficiently creating a true löyly experience.
• Sauna rocks that last longer and fracture less, stretching the replacement cycle from every year for standard home sauna use to every 1.5 - 3+ years (1.5 – 2+years for heavy use saunas like gyms or spas).
• Easy to stack with great air circulation, the split face of these stones makes weekly restacking easier ensuring that your heater continues to run in peak condition.

Compatible with:

• Harvia KIP
• Harvia Virta
• Homecraft H-Series
• Homecraft Revive

Have questions about our sauna accessories? Call us at 1-800-567-8036