Harvia Sauna Stones have been comprehensively tested under harsh conditions to ensure they are safe to use within your Sauna and perfect for heat retention and heat efficiency.
This 20KG box of Sauna Stones is compatible with nearly all Sauna heaters worldwide. Stone size can vary from 5-10cm but can be broken down.
WARNING: Sauna stones are known to 'pop' during the first heating sessions. For this reason, we strongly recommend heating your sauna all the way up with these stones on top of your heater, three times before you begin sitting in there and pouring liquid over the stones. This will allow for any popping to take place, following that, you can simply place the smaller stones back on top of your heater and you will be good to go.
Please note, this is an oversize item.