I am a pollen allergy sufferer myself and I would say that it already helps.

If you haven't bought the device yet or for other allergy sufferers: Blueair is a strong HEPA air purifier. I have allergic asthma and especially on tropical nights it can come to an attack. Only my Blueair fan helps, in a very short time (max. a few minutes) the whole room is particle clean. The "clean" smell is a bit specific, but still better than sleepless nights. In addition, the device has a sleep function in which it is whisper quiet.