Instruction: Evaluate the answerability of a question by analyzing the related document, outputting yes if the document contains information addressing the question, and no otherwise.

Input:
Question: do i have to buy special 6inch flanges to connect to fan and ducting
Document: Quieter with the duct access cover closed. I have this unit attached to a thermostat switch which turns it on. Unit is durable and smooth operating. I purchased the two flanges sold by Amazon that are fitted for the unit. Buy the flanges if you are trying to seal this unit into a duct or wall penetration.
can not go wrong with this one.the only company I will buy a fan from is CAN MAX FAN.customer for life.
awesome inline fan, already want to buy another, super quite, will probably be looking for a 5 inch , love the speed control
This fan moves a lot of air, I put it on low setting and it moves plenty of air for my needs. Pretty quiet on low but the higher speeds makes more noise at my vent outside of my house but not from the fan just from the amount of air moving through it. On low it makes less noise than a drier but on high it's probably twice as loud standing near the vent. I would buy again.
Very nice setup. So if this is for a small space then I recommend that you go a head and buy the fan, but have a few extra dollars on reserve in case you really need to slow this puppy down.Customer service was outstanding. i got a human on the phone in less than 2min. The rep knew the fan inside and out and even helped me setup the Variac to control it. Also warned me of the fans limitations. Good old fashioned customer service like companies used to have!
This fan has a 3 speed dial, allowing you to get what you want out of this fan performance wise based on your needs. It draws through a carbon filter very well and works silently with the ducting taped on leading out. Don't worry about the plastic casing, its a very durable fan that works really well. besides your mounting it and letting it work in one spot until it dies in 2 years.
Excellent for cooling and high quality. Very quiet which is a plus since most are not. I would buy another.
installation for my particular application was simple. was hoping that noise level would have been lower but had noother fan to compare it with.
does what i needed efficiently would recomend strong fan prompt delivery undamaged get this fan for your heat woes oh yeah
Amazing fan. Relatively quiet..especially in position 1 or 2. The 300 CFM or so are really cool. used it for crawl space and finally got it dry after flooding with that thing...
Answer: yes