The Entreeair door frame fan is a safe, efficient and effective way to gently circulate warm or cool air from room to room. The Entreeair door frame fan generates up to 100 CFM of airflow to effectively increase air circulation. With its simple installation and quiet operation you will barely notice the door frame fan. Comes with an easy to use on/off power switch and a 10′ power cord. Rotom provides a 1 year limited warranty with the Entreeair door frame fan.