Cozy Heat SW Thru-Wall Sauna StoveCOZY has taken the craft of building a wood fired sauna stove to a higher level. The SW TWs convenient through the wall design lets you feed the firebox from outside your sauna so you dont need to bring wood into the room. Cozy Heats SW TW wood burning sauna stoves are made in Estonia, where sauna bathing is a way of life. Designed for performance and durability and strength. The part of the wood burning heater that must be the strongest, the flame