Harvia R-991 R991

Rounded Olivine Diabase sauna heater stones resemble nature's rounded stones from the great rapids, bringing a softer tone to your sauna along with multiple benefits. This stone introduces a soft steam method; the pouring water runs easily down to the lower stone layers. This way the water reaches more surface area, generating more steam with a softer touch. This method of using rounded stones on the top layer of the heater works in all sauna heaters. 

We recommend using angular stones in the bottom layers as they give more heating surface area for the water. This combination provides the best result for soft steam and effective heat generation, especially in heaters with smaller stone capacity.

• Elegant rounded sauna heater stones made of olivine diabase
• Selected, clean and safe to use
• Resemble nature's rounded stones from the great rapids
• Rounded stones provide more softer steam
• Needs to be piled loosely to guarantee good air circulation and longer heater life
• Especially in heaters with smaller stone capacity, use same sized angular stones in the bottom layers as they give more heating surface area for the water
• Color and stone species: Gray olivine diabase
• Stone size 5-10 cm and box weight 33 lbs (15 kg)
• Does not contain harmful ingredients

• 33 lb box of 2" to 4" (5-10 cm) sauna stones