HUUM Hive Heat Series 12.0kW Brushed Stainless Steel Wood Burning Sauna Stove With Firebox ExtensionThe HUUM HIVE Heat 12 LS wood burning sauna stove features a firebox extension so that it can be heated from another room. The Heat 12 LS ideal smaller saunas up to 459 cubic feet (CF). The cast iron furnace door is incredibly durable and easy to maintain. The firebox extension on the HUUM HIVE Heat 12 LS allows loading from another rooms so you don't need to store wood in your sauna. HIVE Heat 12 LS is a highly efficient wood fired sauna heater for