Perennially confined crawl space lacks outside air circulation, causing moist air collect in the space. Prolonged moisture causes to grow and wood to rot, which affects the structural integrity of the wood. Wet wood also attracts annoying groups like reptiles that gnaw and erode, causing additional damage to the wood. What's more, airborne spores enter your living space through floors and cracks and even crawl space HVACs, thus creating indoor air pollution that will endanger you and your family's health.Isolation Mesh:Add isolation mesh to prevent reptiles from entering the machine to affect normal operation and stop reptiles from crawling into your living space.Freeze Protection Thermostat:Built-in dehumidifier & freeze protection thermostat. Dehumidifier control will automatically shut down to protect the machine if the freeze protection thermostat senses outdoor temperatures lower than 35 deg F/1.7 deg C. Specifications Motor 115V AC~ 50/60Hz 0.25A Airflow Range(Pa) 260 CFM Size for 2400-3600 cu.ft. Dehumidistat 5% - 80% RH Thermostat ON at 50 deg F / OFF at 35 deg F Sound Pressure Level(dBa) 40 dBA Dimensions 13.4 x 9.1 x 2.5 inch Weight(lbs) 3.8 lbs Power Cord(ft) 6 ft ETL Certified ETL