Harvia Cilindro PC90, a modern steel pillar style sauna heater featuring built-in controls, is engineered to power sauna rooms up to 494 cubic feet (CF) Side-wall or corner of room install For sauna rooms from 141 to 494 cu. ft. Requires a minimum of 200lbs of stones (5 box-AC3000) Direct rock-to-heating element contact Industrial grade, serviceable heating elements Designed, engineered, and made in Finland Dimensions: 14"W (355mm) x 13"D (330mm) x 40"H (1016mm) Manufacturer's Note:Sauna heater stones are significant to the unit's safety. Manufacturer's Note:Sauna heater stones are significant to the unit's safety. Installation and operation manual Requires a minimum of 200 lbs of sauna stones ( 5 boxes) sold separately