Most are formulated for carpets and upholstery. Several products also list use on hard or multi-surface areas and in enclosed spaces such as refrigerators and freezers.
They commonly use baking soda as an odor neutralizer, enzymatic/bio-enzymatic formulas, hydrogen peroxide–based cleaners, and HEPA filtration in air purifiers.
Boxes are designed to be replaced every 30 days, though some users report they can last longer—sometimes up to a few months depending on conditions.
Listings typically show coverage around 300–500 sq ft for one air change per hour and recommend replacing filters roughly every 6–12 months, with 12 months cited as a maximum service life.
Carpet powders are sprinkled onto dry carpet, left to sit, then vacuumed. One product recommends a sit time of about 15–30 minutes before vacuuming.
