Instruction: Analyze a question and its supporting document. Predicting answerability based on the information provided in the document. Output yes if the document contains relevant information to answer the question, otherwise output no.

Input:
Question: is this a single speed fan?
Document: This fan had poor instructions and drawing that did not match the shape or parts of this fan. It was quite confusing to assemble. I ordered it and did not have time to install it in time, before the return policy expired. The fan is noisy -it makes loud hum even on low speed.
I just finished installing this ceiling fan. It has me so po'd that I'm just going to summarize what's wrong with it. Glass was broken straight out of the box. The lower housing is ringed by metal but is cheap (and warped) plastic on the inside. This causes it to wobble even at the lowest fan speed. I know there is a balancing kit, but this is the 1st time in 30 years I've needed to use one.
It takes that long just to put the bolts on the blades; and even longer to attach the blades to the fan housing. Having installed other fans I was able to figure out the installation despite the inferior directions. Noise -- the fan doesn't make any noise on high speed but on medium speed or slow it is extremely noisy. I installed it in my gym so it will always be on high but I imagine that noise would be very annoying for some buyers.
Put it in my small kitchen, it looks great, works great too. At lowest speed it's a little noisy, fine for a kitchen but not for a quiet location.
The fan worked ok, but made too much noise for use in the bedroom where it was intended to be used.
This fan was perfect for what I needed, a bit tough to install but it works very well. and it arrived promptly.
Purchased this fan for my front porch to have air moving and keep bugs at bay. Has preformed above my expections and operates quietly.
You can feel the air circulation if you are right fan. I am happy for what I needed it for...a small room with low slopping ceiling.
I would recommend this fan for any room in an average size home. My living room is 16 x 20 and it works very well in this large a room.
Ours has been mounted and used for about 3 years in our kitchen. The fan is a little loud when on high and it won't reverse for some reason. We will look into buying a different fan. It is a great look, and very small.
Answer: yes