If temperatures in the crawl space or basement fall below 65 degrees Fahrenheit (F), frost can form on the condensing coils, causing the compressor to continuously turn on and off without removing moisture from the air. It's recommended to install a dehumidifier that's specified for use at a lower temperature. The lowest operating temperature of Basement Systems' Sedona dehumidifier is 40 degrees F. The Sedona also has an auto-defrost cycle feature to prevent the unit from freezing in colder temperatures.