A fan coil includes a humidification unit having an inner container, an outer container, a water supply conduit, and a shut off valve. The inner container includes a water supply for a water mist production member and an inner container water level detector. The outer container includes a reservoir and an outer container water level detector, and the outer container is positioned to receive water which leaks from the inner container. The water supply conduit is connectable to a source of water and is in fluid flow communication with the inner container. The shut off valve is provided in the water supply conduit. The shut off valve is in a closed position when the inner container water level detector senses a high water level in the inner container or when the outer container water level detector senses a high water level in the outer container.