Instruction: Output yes if the supporting document can answer the given question. Otherwise, output no.

Input:
Question: Small bathroom but used a lot is it recommended to get higher than the 90 CFM?
Document: First, the good news:  this is an EXCELLENT performer. It's quiet (for a bathroom fan) and yet moves a lot of air. We're using the 90-CFM in a small "water closet" type area of our larger bathroom and are very happy with the performance of the installed fan.Reading through the reviews before our purchase, I thought this would be a relatively easy fan to install. In our case, NO. To be fair, this WAS NOT a new installation.
I replaced a small (50-CFM) fan with it, and it does move the air and moisture rapidly. I have installed many fans in bathrooms, and this is one of the easiest installations I have done. I had to increase the vent from three inches to four inches for this fan.I needed a bigger fan in the bathroom, since the existing fan would not eliminate the moisture when the shower was used. This fan works great! It is very quiet, compared to most fans out there.
Lastly, this fan claims 90 cfm, I call BS on this. I held a piece of paper to vent to check suction. It barely, and I mean barely held it in place. I then tested the unit with actually taking a shower and you guessed it, lots of humidity on walls, mirror. Basically still a sauna. Mind you, this is a very small hall bathroom (6'X10') which according to CFM calculations requires a fan able to move 60 CFM.
My Air King BFQ 110 motor went out. But because of the size of the room  I needed more CFM. I noticed that the 140 had the same size housing as the 110. So I took a chance and ordered the 140. Install was easy because the housing was already in place. The noise level is a lot higher then the 110, but as long as it moves more air I can live with that. I did price replacing just the motor.
We have a very small bathroom (about 5 feet by 8 feet), but i still wish i had spent the extra money on higher CFMs. We just leave it on all the time. It does help though.
The only bad thing about this fan is the cover/grill. It's thin and cheap and I am not completely happy with it. This is a problem with most fans anyway, and this one is cheaper, quieter, easier to install, and of higher quality than comparable fans at the big hardware stores. Those complaining about sound do not have experience with bathroom fans with this type of CFM.
This review is for the 90-CFM fan only.An easy to install, quiet bathroom exhaust fan.This is a bathroom fan that runs as quiet as any fan I have ever had. It is quiet enough that you will sometimes wonder if it is working. It is very easy to install, compared to many I have done.
Relatively easy to install despite my house's horrible setup. This thing is not quiet but again it may have a lot to do with the bathroom which is basically in the middle of the house with no windows and is rather small. After installing I lit a match and blew it out to see how effective the fan was at sucking out the smoke. From about 4 feet away you could see the smoke being pulled into the fan and did so within a few seconds.
Much bigger than the old fan, slightly quieter and slight improvement on the suction compare to the old 50 CFM from builder.Probably would have gone with higher CFM if  I had know its only slightly better than the old fan.
Or not buying a fan with the correct CFM level. I did quite a lot of research on the internet about proper installation but I tend to over-research everything...
Answer: yes