Multi-stage air filtration is the process of using several layers of specialized mesh to remove dust, allergens, and odors from the air. Every UFC Multi-Zone indoor unit comes equipped with these high-efficiency filters to improve indoor air quality. For families with pets, a Bravo Milano 18,000 BTU Universal Floor/Ceiling can act as a supplementary air purifier while it cools. Keeping these filters clean is the most important part of regular maintenance for any Single-Zone system. We offer various replacement filters and Accessories to ensure your system continues to breathe as cleanly as possible. This multi-layered approach captures microscopic particles that standard systems often miss. It makes our mini splits the perfect choice for users with sensitive respiratory systems.