These contaminants include pollen, mold spores, bacteria, pet dander, and dust. By trapping these contaminants, it reduces your cleaning time and frequency at home, and ensures you're breathing clean air for improved wellness. The 413 Air Filter is compatible with AprilAire 1410, 1610, 2410, 2416, 3410, and 4400 Whole-House Air Purifiers as well as 2140, 2400 Air Purifiers and 2400 Space-Gard using the 1413 Upgrade Kit. And with the 12-month filter life, you only need to change once per year.