This is BIFL, not /r/mid-range.

Zero people can help you as the only metric you buy an air purifier on is the size of the room serviced. We have no idea of your room's size, so we can't help. And by room size, you need to be honest. If you are going to use it in a 120 sq ft room with the door closed, then say so and we can start looking at that size. But if you are going to use it in that room with the door open and essentially exposing it to your 2500 sq ft house, then say so.