Most people associate a filter with one important thing: air quality. Filters keep dust from blowing around the home. More importantly to many people, it picks up allergens like pollen and pet dander, and may even stop the circulation of some germs that could make you ill.
However, not everyone suffers from allergies, asthma, or other conditions that would require excellent indoor air quality. If you’re one of the lucky few who doesn’t suffer from allergies, you might not worry too much about the filter. In fact, many such people—especially those who don’t want to deal with regular filter changes—have asked us this question: “Can’t I just run the furnace without a filter?”