PTF-PE series Eco-Watt Mixed Flow Inline Duct Fans include EC motor technology with ultra-low power consumption and variable speed control. Each fan body is made of lightweight environmentally friendly double-iinsulation material. The innovative hydro mechanical design ensures optimal airflow and pressure, high operating efficiency, and low noise and the special joint design facilitates easy installation and maintenance. Additional features can also be added including a user-friendly timer, temperature sensor, humidity sensor, and other custom features. The fans can operate from -20℃ to 60℃ and include thermal protection and dual ball bearings for long-life operation up to 50,000 hours. Protection Class:IP44.