I had an earlier version of this fan.  It was good while it lasted, but it had a major design flaw--the grill cannot be taken apart to clean the fan blades--the clips/snaps for the extension hold the front and the back of the grill together, in addition to the screws.  Even if you remove the screws, the plastic snaps of the extender cannot be removed without breaking them.  Ease in manufacturing but not in actual use.

The Holmes instruction manual said just to clean off the grills with a vacuum, or compressed air.  Well, if there is any kind of grime, it is impossible to get rid of the grime without washing--which they caution against.  The fans get caked with grime and wobble, and I assume they get heavier too.  I could not take the grill apart without breaking so I had to spend three hours using forceps and alcohol pads to slowly clean the fans off through the grills, both front and back.  Stupid design--maybe because it is a throw-away item after a few years.  But no fan manufacturer makes fans where the grill does not come off for cleaning of the blades.

The thermostat has stopped working a few years ago.  I called for warranty they said not covered, and cannot be repaired.  So just throw away.  Although the fans wobbled and not as strong, I decided to keep, and to clean it.  Will not buy this again.
I had an earlier version of this fan. It was good while it lasted, but it had a major design flaw--the grill cannot be taken apart to clean the fan blades--the clips/snaps for the extension hold the front and the back of the grill together, in addition to the screws. Even if you remove the screws, the plastic snaps of the extender cannot be removed without breaking them. Ease in manufacturing but not in actual use. The Holmes instruction manual said just to clean off the grills with a vacuum, or compressed air. Well, if there is any kind of grime, it is impossible to get rid of the grime without washing--which they caution against. The fans get caked with grime and wobble, and I assume they get heavier too. I could not take the grill apart without breaking so I had to spend three hours using forceps and alcohol pads to slowly clean the fans off through the grills, both front and back. Stupid design--maybe because it is a throw-away item after a few years. But no fan manufacturer makes fans where the grill does not come off for cleaning of the blades. The thermostat has stopped working a few years ago. I called for warranty they said not covered, and cannot be repaired. So just throw away. Although the fans wobbled and not as strong, I decided to keep, and to clean it. Will not buy this again.