Internal air tunnel for HIVE sauna heaters speeds up sauna heating by 25% and extends the life span of heating elements. It is made of stainless steel and installed in the middle of the heater. When using the air tunnel, you need approximately 2 boxes fewer stones.

• Compatible with all HIVE heaters
• Shortens heat-up time
• Increases life of heating elements
• Less stones needed to fill heater
• Constructed of stainless steel

Contents: 

• HIVE Air Tunnel
• Installation and operation manual
• 5-Year limited warranty

Dimensions: 7"L x 12"W x 20"H