As mentioned in several of our webpage's articles on Air Cleaning, home pollutants are varied, and can come from almost anywhere. With spring just around the corner, it's very likely one of the larger pollutants in your home will in fact be pollen. If you've ever wondered why when you've been inside, and your allergies haven't been acting up, but as soon as you go outside, they begin to flare—consider that "fresh" outdoor air can have 30 million or more pollutant particles per cubic foot. Much of this is likely to be dust and pollen, particularly in the spring. No wonder your nose gets itchy!