Harvia Virta Combi HL110SA, a versatile combination of a 10.5kW electric sauna heater and a steamer, is available in both single and 3 phase and is engineered to power sauna rooms up to 635 cubic feet (CF). Requires Xenio control and a minimum of 150lbs of stones, sold separately. Sidewall or floor mount install For sauna rooms from 177 to 635 cu. ft. Requires a minimum of 150lbs of stones (4 boxes-AC3020) Works with Xenio Control (sold separately) Automatic and Manual water filling are available 5 Litres Water reservoir capacity Direct rock-to-heating element contact Available in 240V/1PH and 208V/3PH Industrial grade, serviceable heating elements Designed, engineered, and made in Finland Dimensions: 16"W (406mm) x 19"D (482mm) x 33"H (838mm) Manufacturer's Note:Sauna heater stones are significant to the unit's safety. Installation and operation manual Harvia Xenio WiFi Remote Control Sauna Stones Requires a minimum of 150lbs of stones(4 Boxes - Harvia AC3020)