It will not require associated with electricity and they have the efficiency to cool the space of to a max of 400 square.ft. A general rule of thumb that most people use is, to your room that measures 150 sq ft, one will require a unit with an energy of 7,500 BTU's. At just $395, it could cool a room of about 300 to 400 sq ft. It won't require daily emptying of a drain serving.