Yes, floor AC units are generally safe as long as they are used properly and maintained regularly. However, like any other electrical appliance, they can pose certain risks if not handled correctly. It is important to ensure that the unit is placed on a flat, stable surface and that it is not obstructed or covered by any objects. Additionally, it is crucial to follow the manufacturer's instructions regarding electrical connections and avoid overloading the circuit. Regular cleaning of the filters and coils is also essential to maintain safe operation and prevent the build-up of dust or mold. It is recommended to have a professional technician inspect and service the unit annually to identify any potential issues and ensure its safe operation.