Product review (1 stars): was with an annoying high-pitch noise (intermittent but frequent) that I thought sounded ...
I bought this range hood because our old one did not move enough air to keep asthma symptoms from flaring when we were baking or cooking meat on the stove top.  The Kobe hood did move a lot of air - although not enough to prevent kitchen smells diffusing through the house.  Our problem, however, was with an annoying high-pitch noise (intermittent but frequent) that I thought sounded like a bearing in the motor.  I contacted Kobe's service department and, as requested, provided them a recording of the fan running at different speeds to produce the noise it was making.  The Kobe's service rep then advised me that the noise was that the two fans were imbalanced, and he sent me two new ones with instructions to install them.  After I installed the new fans, it sounded OK at first, but soon started making the same high-pitch noise.  The service rep suggested that I check some other things, but these seemed to be beyond my abilities so I asked for a service technician to come out and fix the problem.  Kobe had a local appliance repair firm send out a technician, who said almost immediately that both fan motors had bad bearings.  Kobe sent the repair firm two new motors, and the technician came back and installed them.  However, these new motors were making the same noise that the old ones did, and the technician called the Kobe service department and left them a message to call him.  Kobe did not call him; rather, they contacted me to make some additional recordings, including some video and send it to them.  After several days delay, they did contact the service technician saying that they had tested the new motors before sending them along.  Apparently, they tested them at only the highest speed, which was not where the noise presented a problem.  At the highest speed the fan and rushing air made enough noise to mask the problem sound coming from the motors.  By that time - more than six weeks after the fan had been installed - I was debating with myself on whether I wanted to continue struggling with this Kobe fan or to take a monetary loss (by then the return period for Amazon had been exceeded) and buy a different range hood.  I decided that a range hood that gives me this much trouble when it is brand new could be a long-term struggle with little to no satisfaction.  I sent an email to Amazon asking what my alternatives were for this faulty product I had bought through them, and they replied that although the return period had already been exceeded, I could return the range hood and get most of the purchase cost returned.  Accordingly, I bought a new hood from Amazon, in part because the local dealers either did not carry the model of Broan hood I wanted or would have to special order it.  This experience cost me a couple of months and about $150 of the purchase price (presumably the cost of shipping the return) in addition to about $250 for installation.  So, now I have a new range hood that is virtually identical to the old one that I got rid of when I bought the Kobe, and it moves about 450 cfm at high speed.  I recommend that you think very hard whether or not you want to take the risk on a Kobe hood if you're inclined toward buying one because it could cost you, as it did me, a lot of time and money in the long run.  I emphasize that my dissatisfaction is directed only toward Kobe, particularly their service department for not working more closely with the service technician they hired to resolve my problem rather than sending instructions for additional actions that I could take so they could second guess the technician.  I am happy with Amazon's role in this affair because they were willing to reduce my loss on the faulty product from Kobe.