Instruction: Generate an answer to the question by utilizing the information contained in the document.

Input:
Question: Is there a simple way to clean these fans?  ie: do the balde covers come off so that they might be washed and the blades cleaned?
Document: This uses very efficient fans blades to quietly move lots of air. Only caveat is the fans are designed to work one way, so you need to turn them around to blow the other way. Controls on both sides make it less of a bother.
It was very easy to set up straight out of the box. The extenders fit into my window nicely to make almost an air tight seal. I use it mostly as an exhaust and even though it might look small, man it can pull in and out a huge volume of air. The only reason why I did not rate it all 5 stars is because I know other similar models come with the ability work as a fan or an exhaust at a touch of a button.
For how expensive it is it does not bring in enough air. Can almost get an AC for this price. Really wimpy fans and it doesn't come near long enough to fit my window.. guess I should have measured.. but it's tiny!
My window opening is about 9&#34; tall and this fits in. Most window fans are too tall. I might get a second one.
I chose this rating despite the fact the air flow can only come in or go out for all three fans. Nevertheless I am learning to cope with the central air always being off even if when a noticeable steep elevation in heat is detected. I than can turn the fan around in the exhaust mode if necessary to vent the hot air out.
Pros-Very quiet inside and out-Moves a lot of air-Slim enough to keep in a window all day.Con:-I have no idea if the temperature sensor works-(Not exactly a con) Low is mid fan only, medium is outer 2 fans, high is all fans. (This might extend the life of the fans.)
It really does look much more elegant than 2 fan units. Air flow is decent with all 3 fans running and is a huge difference over not having a window fan. But that is where the benefits end compared to the better 2 fan units.The &#34;speed&#34; control is simple a choice between switching 1, 2 or 3 of the fans on.
This is fan is way better than any other fans I tried & this is my third,finally a good one !! Only 1 drawback to reverse airflow you must turn fan around manually, other than that I highly recommend this bionaire fan over any other window fan !! !
Being thinner makes the extenders more stable than wider fans when installing vertically. Super quiet. Would have been just as easy to put a manual switch on the front for reverse as puttiing controls on both sides, silly to do it that way. As far as this being a "whole house fan", I suppose any of them would be if circulation is all your after. As far as cooling, no way!
If your window does not push VERY tightly against the fan, a strong breeze can blow it out of the window-overpriced for performance and options compared to twin window fans - should be priced around $20If you're looking for a fan specifically to fit in a small horizontal window and/or just need a little extra air circulation you might be happy with this fan.I was very disappointed with this fan considering the price I paid and will be returning.
Answer: I've successfully used a can of compressed air to clear the dust off - worked very well.