To make a long story short i had a situation where this fan is running for 8 hours a day or maybe sometimes for 11 hours a day everyday and its been like this for three years now and let me tell you this thing lasts forever i dont know if they knew that when they made it but the fan blade must be a light load on the motor or something but as far as durability goes it has lasted for ages. Ive never owned a fan that has been run for days and years on end so this was the first one. Do all fans last this long i wonder.