Furnace Filters 101

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Why change filters regularly


How Filters Work

Your furnace pulls air from the room, heats the air, and a blower moves warm air through the ducts in the house. The filter is designed to trap airborne particles, such as pet dander, dust mites, pollen, mold spores, and bacteria from the air moving through the system. Once the filter gets full of these airborne particles, you need to replace it, allowing your furnace (and you) to breathe freely again.


Why Replace Filters Monthly

If your filter becomes full of airborne particles, there is a greater risk that the particles in the air can enter the blower on your furnace, causing it to also become clogged and require maintenance ore replacement. It is much easier and far less expensive to replace a furnace filter than to replace prematurely worn parts in the blower assembly.


Is Indoor Air Polluted?

According to the Environmental Protection Agency (EPA), the air we breathe indoors is five times more polluted than the air outdoors. That's a staggering fact that only gets worse when your furnace filter becomes clogged with dirt, dust, pet dander, and other particles that flow through the indoor air.


Signs You Need a New Filter


  • You hear your heating system coming on more often than you consider normal
  • Your home seems dustier than usual
  • You smell a dirty, dusty odor when your furnace comes on
  • You see dust and/or dirt around the air vents in your home


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Filter Reminder Service

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Custom Size Request?

Can't find the size of filter you need on our site? Please just fill out the email form and let us locate the filter for you. We will contact you ASAP with the information. Thanks for using Front Porch Air Filters.

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