Dust, pollen, mold spores, smoke particles, and pet dander. All these air pollutants can cause respiratory problems, especially with children and elderly people.
Kate Malone's insight:
Air cleaner models using Ionizer to clean the air sound sophisticated. Unlike filter-based method, ionizer-based air devices generate electro-static charges which will subsequently attract the dirt and particles to it. Are such models better than the filter-based air cleaners that are more commonly found in industry?