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About this item Functions Applications Airflow: 720 CFM ventilation type: air out. The High-Flow Powered Ventilator fan for damp crawl spaces basement attic and garage to reduce humidity. It can increase air circulation to stop condensation and wood rot. Also used for exhausting vent radon gas treating wood gases and odors and preventing them from entering living spaces. Key Features Built-in dehumidistat and freeze protection thermostat. Operating humidity: 5%-80%RH this Alorair Ventilator Fan will turn ON/OFF automatically with SET Humidity % Level. The Dehumidistat control will not operate if the freeze protection thermostat senses low outdoor temperatures 35F/1.7C. . Built-in Isolation Mesh IP-55 Rated Axial Fan Isolation Mesh on the back prevents reptiles from gaining access to the crawl space; The Aluminum Zinc Shell with an IP-55 rating Axial Fan is highly resistant to liquids and dust higher weather-proof makes it ideal for work in a humid environment with long service life don’t worry it rusts. Easy to Install Operate Vent Fan 720 CFM Air Out; 16.5 x 11.1 x4.1 Inches; 115 Vac 50/60 Hz; 0.7 Amps; Noise: <55dB.10-inch fan with 6-foot grounded power cord. When installed the Faceplate can be trimmed to match non-standard foundation openings. Just plug it in set it and forget it. IMPORTANT: All models are equipped with factory pre-installed thermostats to prevent fan operation when outdoor temperatures fall below 35F.