The Harvia Virta Pro HL200E heater provides ample heating power for saunas in spas, hotels and apartment buildings, for example. Thanks to its strong construction, heating elements divided into two groups and exceptionally easy maintenance, the Virta Pro heater is an excellent choice for heavy duty use. The streamlined and stylish heater always provides even the most demanding bathers with a pro-class sauna experience. Required Xenio Control, power extension unit, and a minimum of 264lbs of stones, sold separately. For sauna rooms from 354 to 1130 cu. ft. Requires a minimum of 264lbs of stones (6 boxes-AC3020)Please note that each natural stone is unique in shape and size. We recommend purchasing an additional box of sauna stones to allow you to choose the highest quality of stone for fit, form, and function (Additional freight charges will apply). Please note that each natural stone is unique in shape and size. We recommend purchasing an additional box of sauna stones to allow you to choose the highest quality of stone for fit, form, and function (Additional freight charges will apply). Works with Xenio Control (sold separately) Work with Xenio Power Extension unit (sold separately) Direct rock-to-heating element contact Industrial grade, serviceable heating elements Designed, engineered, and made in Finland Dimensions: 31"W (787mm) x 16"D (406mm) x 33"H (838mm) Installation and operation manual