A cold catalyst filter is a specialized indoor air cleaner that helps decompose harmful gases like formaldehyde and ammonia. It works at room temperature and doesn't require UV light or high heat to function. You can find these filters as standard or optional equipment in many of our Wall Mount units. They are a great choice for people sensitive to chemical odors or those in new construction. We stock these and other Replacement Filters in our online store. Regularly checking these filters is a key part of your Preventive Maintenance. It helps keep your indoor air clean and healthy for the whole family. This is another way our Heat Pump Systems prioritize your well-being.