BATH SYSTEM

To provide a bath system capable of appropriately attaining reduction of running cost, prolongation of a service life of a sterilization device, etc., by cancelling useless much sterilization of hot water when using the hot water in a bathtub for an application such as washing.SOLUTION: A bath system comprises a sterilization device E, a control unit 7 and data setting means 7A and 7B capable of setting data relating to a required quantity Q1 of sterilized hot water. Before starting a sterilizing treatment of a bathtub 1, in the case where the quantity of hot water in the bathtub 1 is more than the required quantity of sterilized hot water which is set by the data setting means 7A and 7B, the control unit 7 utilizes drain means 11 to drain the hot water in the bathtub 1 within a range that the hot water in the bathtub 1 does not become less than the required quantity, and defines hot water residual in the bathtub 1 after the drain as a target of the sterilization treatment.SELECTED DRAWING: Figure 1 【課題】浴槽の湯水を洗濯などの用途に用いる場合に、湯水を無駄に多く除菌することを解消し、ランニングコストの低減化や除菌装置の使用寿命の長期化などを適切に図ることが可能な風呂装置を提供する。【解決手段】風呂装置Ａは、除菌装置Ｅ、制御部７、および除菌済み湯水の必要量Ｑ１に関するデータの設定が可能なデータ設定手段７Ａ，７Ｂを備えており、制御部７は、浴槽１の除菌処理を開始する前において、浴槽１の湯水量がデータ設定手段７Ａ，７Ｂにより設定された除菌済み湯水の必要量よりも多い場合には、排水手段１１を利用して、浴槽１の湯水が必要量未満にならない範囲で浴槽１の湯水を排水させ、かつこの排水の後に浴槽１に残存する湯水を除菌処理の対象とする。【選択図】図１