

I first noticed it with a cheapo box fan -- at first it was great, but by the following summer, I could barely feel a breeze coming out of it, even though the blades seemed to be spinning as fast as ever.



Thinking maybe something was happening to the blades over time, I bought one of those expensive big all-metal fans. Which was initially awesome -- it turned my house into a wind tunnel -- but over the course of a year or so, I noticed the airflow decreasing with that one as well. This one is about three years old now, and even on high, it creates maybe a soft breeze. Yet, again, the blades seem to be moving normally on all speeds.



What is happening here? I've tried taking the grill off and cleaning out all the dust, but it doesn't help. Mystified!

Something I've noticed with the two electric floor fans I've had in the past few years is that, over the course of many months, the air flow becomes dramatically weaker. Why is this, and can it be remedied?