All CPAP machines use CPAP filters. There are different CPAP filters for different users’ needs. Some CPAP filters are designed for people who suffer from asthma or allergies; these filters are able to remove extremely small dust and dirt particles in the air. Other CPAP filters are designed to block out pollen and dander in the air. They are either disposable or non-disposable or both. They come in different types and sizes, depending on the type of machine you have and what your specific needs are. Changing and/or cleaning your CPAP filters on a regular basis is imperative for your optimal health and CPAP therapy performance.