In addition to eliminating most pollen, this purifier is effective for unpleasant odors (cooking, tobacco ...). I have not been around long enough to know the rate of replacement filters. It is very quiet in its normal operating phase, which is nice in a room. However, if it is to accelerate the detection of more numerous particles, noise is important. Pity so many front light. There should be a day detector / night to reduce this nuisance at night.
