Air Filters act as barriers to prevent contaminants and other particles from circulating in the air. They block dust, pollen, lint, mold, hair, animal fur, bacteria and more. Basic filters should be changed at least every three months by homeowners or tenants. This will help your HVAC system work properly and will keep your energy bills from going up. The schedule that you keep for changing your air filters depends on the circumstances of every home and the kind of filters yo