In a residential forced-air system, the filter shields HVAC equipment from becoming dirty and damaged while also protecting occupants from problems associated with poor IAQ. Replacing filters regularly and properly can help minimize or even eliminate IAQ concerns, yet many homeowners forget to do it or simply aren’t aware they should be changing their filters between maintenance visits. To remedy that, forward-thinking HVAC contractors are training technicians, educating customers, and even providing filter-delivery services on behalf of maintenance customers.
Poor IAQ can have potentially serious consequences, said Ben Hubbert, owner, Champion AC, San Antonio. “When you have an old filter, or a filter with too low of a MERV rating, particulates will still flow through the system and may enter the air cycle. Breathing in particulates and allergens can cause sneezing, a stuffy nose, and, in some cases, even intensify an individual’s susceptibility to catching the flu or other illnesses,” he said.