AC filters may seem like a relatively minor item when compared to major components such as the air conditioner coils or that big, expensive system compressor. However, if you consider that every breath of air you take indoors has circulated through the HVAC filter continuously, it takes on greater importance. AC filters also play an important role in sustaining indoor comfort as well as supporting efficient cooling at the lowest monthly costs.

Regular air-filter replacement is required by the warranty terms of all major manufacturers of air conditioners and furnaces. Generally, filters should be replaced every month up to every three months, depending on the specific HVAC component as well as the season of the year. A professional HVAC contractor can give you advice about the type of air filter that’s appropriate for your HVAC system, as well as how often it should be replaced.

However, what happens if you don’t change your AC filters as recommended? Air filters are continuously accumulating dust, dirt, airborne spores, bacteria, and other visible and invisible particulates. As the filter becomes loaded, airflow through the filter is gradually but steadily obstructed. Here are some of the downsides of leaving that old filter on the job too long.

• Unhealthy indoor air quality. Filtration efficiency gradually declines as particulates accumulate in the filter media. Eventually, the filter no longer performs up to its original filtration rating.
• Increasingly longer cooling and heating cycles to maintain thermostat settings in the house also mean lower energy efficiency and higher monthly electric and gas costs.
• Inconsistent temperature control in the house. Lower airflow due to filter obstruction means cooling and heating don’t circulate effectively throughout the entire duct system.
• Increased wear and tear on HVAC components due to extended operating cycles and particulates accumulating inside the system.
• Depending on the manufacturer, neglecting regular filter changes may void the AC or furnace warranty.

The professionals at Jackson & Sons are ready with more advice about the appropriate AC filters for your home, as well as recommendations for regular filter replacement.