Bionaire BAP1500-U HEPA Air Purifier

I got this Air Purifier with a coupon at Costco for about $100. It looked good and had all the features I wanted. I got home, turned it on and within a few hours the new filter scent had gone away. Unfortunantly, however it also began to make a strange and very loud buzzing noise from the front air discharge grill. I was able to stop the noise, by pushing on the front, but it continued to come back. After trying to see if the noise would go away for a few days I have decided to return it to get my money back. I am planning to order another air filter from Costco, not a Bionaire but a Honeywell. I have another Honeywell filter downstairs which works very well and I have had no problems with it whatsoever. The Bionaire filter worked well and did help my allergies, but it had the annoying vibration noises and the air came mostly out in one direction. If you buy this Air Purifier just make sure that you keep the receipt and box for a few days just to make sure it is working ok.