A central air conditioning system does more than just cool your home or office—it also helps clean the air by filtering out dust, pollen, and other particles. Most systems use one filter, but some have two. This dual-filter setup is helpful for larger homes or buildings with more complex layouts. By using two filters, the system can improve airflow and catch pollutants from different areas before pushing clean air back into your space.
Two filters are often needed when a system has multiple return air ducts or an air handler designed to hold two filters. In homes with several ducts, each duct may need its own filter to keep the air clean and stop dust and pollutants from re-entering the system. This extra filtration is especially helpful for people with allergies or breathing problems. In this blog, we’ll explain why some central AC systems use two filters and how it can make your indoor air healthier.