These spas most always used in a "Stand Alone" application. They are commonly installed in a raised wooden deck or on a stone deck. They come complete with a Red Wood skirt or "surround" that provides an attractive and finished look. They are easily portable when installed this way. Alternatively, they can also be installed below grade with the proper preparation at an extra cost. Although technically still portable, this installation would require reparations to the void cavity once the spa was removed. These types of spas are regarded as the most ergonomic, having graciously contoured interiors and employing a sophisticated multi valve system and dozens of hydro therapy jets used for different effects on various body parts.