Abstract: Provided is a clean booth in an assembled state, including: a frame; a wall portion that is provided on the frame and forms an internal space; a first unit that is provided on the wall portion and includes a first fan that supplies air to the internal space via a first filter; and a second unit that is provided on the wall portion and includes a second fan that exhausts the air in the internal space.

Abstract: Provided is an air conditioning system that maintains a room pressure in a clean room at high accuracy while having a simple configuration. An air conditioning system includes: a fan filter unit including a supply air fan to supply air to a preparation room from a chamber including space above a ceiling of the preparation room; a fan filter unit including a supply air fan to supply the air to the preparation room from the chamber; and a fan filter unit including a return air fan to return the air from the preparation room through the chamber and to exhaust the air from the preparation room, and further includes: a pressure sensor provided in the preparation room; and a control unit to control a return air fan based on a value detected by the pressure sensor.

Abstract: A monitoring device of the invention includes a sensor information acquisition unit that receives information indicating that a monitored person is in a living room or information indicating that the monitored person is not in the living room from a sensor installed in the living room of the monitored person's house, and a sensor information processing unit that reviews information acquired by the sensor during night among the information indicating that the monitored person is not in the living room as information indicating that the monitored person is sleeping, and reviews again information satisfying a predetermined condition among the information indicating that the monitored person is sleeping as the information indicating that the monitored person is not in the living room.