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FAQs about Air Filters

by Paul Sanders

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Woman enjoying filtered air indoors

When it comes to controlling allergies and maintaining your overall health, clean air is a basic necessity. And the air indoors can often contain more allergens and irritants that the air outside. Using an air purifier to filter particulates out of your air is a great first step at taking control. With proper maintenance and a basic knowledge of air filters and air purifiers, you can significantly improve your indoor air quality. Here are some answers to frequently asked questions about replacement air filters to help you get started improving your air quality.

Questions about Air Filters:

  1. How do air filters work?
    Air filters trap pollen, mold, dust and other particles that can provoke allergies. Typically, an air purifier will use one or more fans to push air through the filter. A typical purifier will recycle the air in an average-sized room every 10 to 15 minutes.

  2. What are air filters made of?
    Most air filters for home use are made from a mixture of fibrous materials, such as paper, carbon and plastic. These materials form a fibrous mesh that allows air to pass through the filter but catches particles bigger than a few microns. Chemical filters use absorbent materials or chemical compounds to remove harmful fumes or other chemicals from the air, but they are typically used in commercial or industrial settings.

  3. How often should I replace air filters?
    You may want to swap the filters in your furnace and air purifier every 90 days that the unit is in use. But during heavy allergy seasons, or if there is a large amount of dust present in your home, you may want to replace the filters more frequently. Follow the guidelines set down by the manufacturer of your air purifier.

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