The powerful, aerodynamic Chill HE RV roof air conditioner by Furrion has been engineered with dual fans to increase cooling efficiency by 40 Percent and lower operating noise. It offers effortless control of the temperature and airflow in your RV. The dual-fan design works to move cold air into your RV while simultaneously circulating the air around the primary fan. This design reduces heat generated from operating the AC and increases airflow.