Although Orion Fans 60V telecom fans have a nominal voltage rating of 60V, they can accept a wide range of input voltages, from 36 to 72V. This makes them an excellent choice for standard telecommunications applications, but also enables them to function extremely well when the equipment is running in battery backup mode. The life expectancy of these 60V fans is 65,000 hours at operating temperatures of 45°C or 113°F.