Cozy Heat SW Sauna StoveWood Burning Sauna Stove, Up to 18kW A dramatic new wood burning stove made in Estonia, where saunas are a national tradition. Wood burning stoves produce a mild and long lasting heat and are designed for pouring water over hot stones to create a bracing steam for a more satisfying sauna experience. Elevate your sauna heating experience with the Cozy SW TW and embrace a new standard of sauna bathing! 12kW for saunas from 210 to 423 cu. ft. 18kW for