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: can this be used to draw air from the upper floor to the basement?
Document: Delivered promptly.Shipping charge was high.Fit perfectly in 4"X10" floor register hole. Will be used to push heated air from a basement to a cold room,it is not in ductwork but still can pull air by on/off mode.Slightly noisey but liveable.
I have this. I can not tell a big difference at all for moving hot air from my basement to the first floor. Product is designed nice and all. But it just does not move as much air as I would like. Its some noisy too.
I purchased this for my sons room that has a very week vent flow, his duct is the last on the basement run two floors down.The original booster I purchased was defective so I gave it 2 stars and also because of the poor design. The second unit I purchased functions, but not well. I decided to remove the air restricting plastic fan guards on the bottom of the unit(they are in the duct anyways so why do you need guards!??).
The power cord needs to be longer since our ducts are in the ceiling and the plugs are close to the floor. Had to use an extension cord to run the power up the wall to the duct.
The booster fan is awesome! There is a significant difference in the temperature of the top floor bedroom where it is installed relative to the rest of the house. The noise is a small annoyance that the wife and I happily tolerate for the comfort that it provides. I wish the manufacturer made the same device in different sizes to fit another register.
My daughters large bedromm in the basement was always cold in the winter. There are 2 ceiling registers. I installed this a couple months back, and it is much better now. If you adjust it correctly it will only run while the blower is on.
I purchased this fan to augment the flow from an under performing basement vent.This made a huge difference. My basement is finished, but gets such poor airflow that it was about 15 degrees cooler than the rest of the house.
I can't give it a fair review because I am trying to return it to exchange it for another type of booster fan. The one I purchased is a flush mount for a floor vent and I need one for a wall vent. Can you give me any suggestions on how to return it and exchange it. I've already tried contacting the seller, but have not heard any word for two weeks now.
This has helped considerably in a too-warm bedroom. The fan is a bit loud (but no louder than the desk fan used previously) and the 'on' light is a blinding, bright blue (can be covered with piece of tape). But the benefits far outweigh these two small issues. The thermostat feature works well ... it comes on only when the a/c kicks on and turns off soon after the a/c does. Very happy with this purchase!
My fan is located right above the couch in the TV area of my basement. With those covers removed the fan noise is easily ignored. I do not notice it at all.The plastic shell of this unit has small circular pieces on the short sides. They line up perfectly for screws to mount the unit in a ceiling vent. I did so and it works just fine.The LED indicators on the unit are very bright.
Answer: yes