Ahu Air Pre Filter is an essential part of air cleaning systems, which is used to trap big particles that might be harmful before they get to the main filtering process. It is typically made up of rough materials such as foam, mesh, or fiberglass. Its purpose is to act as an initial barrier that prevents dirt, hair, and pollen from reaching the primary filter. This component purifies the air much more effectively and increases the lifespan of the primary filter which eventually results in saving money instead of frequently replacing the primary filter. Get this premium-grade Ahu Air Pre Filter in various sizes at a reasonable price.