This will be my 6th Lasko 2155A Fan purchased since the year 2000.  I have kept 2 to 3 running at any given time between the months of March and November whenever possible/necessary.  This fan is one of 3 that work without flaws. We've tried to repair the others, cleaned them every year, to no avail.  Once the motor fails, that's it.  In fact, one of the first one's threw a fan blade which was quite loud.