This shark air purifier. Max is amazing quality. We suffer bad allergies and we are always sick but ever since I’ve had this the air in the house feels really cleanse we’re not sneezing as much and our allergies has been really good I even tested by lighting a scented candle right next to it, and it will trigger the machine to Work when I put it on auto, it will start cleaning the air and the percentages drop and I’ll tell you how much time it needs to clean and purify the air. ￼ it detect any allergies at any size and it will pick up and you can hear the machine start working blowing out air really cleaning it and the style looks very nice. It is a little bit on the bulky and big side so I do try to use it like behind the couch.