This innovative unit used the best concept of cooling and dehumidifying system with hot gas bypass. It would be an equipment that is reliable to be operated to meet indoor sensible and latent load requirements. This product dedicated to be applied in special room requirements (temperature and humidity control), e.g. server room, surgery room, archive room, laboratory, telecommunication facility, museum, control center, IC chip product area, area of graphics and printing machine, and other space office room that using high-tech facility.