
Changing your furnace filter regularly is one of the simplest yet most crucial maintenance tasks for your home’s heating, ventilation, and air conditioning (HVAC) system. Not only does it ensure the efficient operation of your furnace in Edwardsville, IL, but it also significantly affects indoor air quality and the overall health of your living environment. The frequency at which you should change your filter can vary based on several factors, so let’s explore what influences this schedule and why it’s essential to stay on top of it.
Why Change Your Furnace Filter?
The primary role of the furnace filter is to trap and hold various airborne particles and contaminants that flow through your HVAC system. These encompass dust, pollen, pet dander, mold spores, and bacteria. A clean filter:
- Improves Air Quality: By capturing contaminants, the filter helps maintain cleaner indoor air, which is especially beneficial for those with allergies or respiratory issues.
- Increases Efficiency: A clogged filter can restrict airflow, forcing the furnace to work harder, which can increase energy consumption and lead to higher utility bills.
- Extends Furnace Lifespan: Regular replacement of the filter prevents excessive wear and tear on the furnace due to overworking, thereby extending its lifespan.
Factors Affecting Replacement Frequency
The “one-size-fits-all” approach doesn’t apply to furnace filters. Several factors influence how often you should change them:
- Type of Filter: Filters come in various types and efficiencies, measured by the Minimum Efficiency Reporting Value (MERV). Higher MERV ratings indicate finer filtration, capturing more and smaller particles. These may need to be changed more frequently as they can get clogged quicker.
- Household Dust Levels: Homes in dusty areas or with high traffic might see filters getting dirty sooner. Regular home activities like cooking, cleaning, and having pets also increase dust and dander in the air.
- Air Quality Needs: Families with allergies or respiratory conditions might benefit from more frequent changes to ensure the cleanest possible air.
- Seasonal Use: During months of heavy usage, like winter and summer, when HVAC systems are running more frequently in Edwardsville, IL, it’s advisable to check and possibly replace the filter more often.
Recommended Replacement Schedules
Here are some general guidelines based on typical conditions:
- Standard 1-3 inch filters: Replace these every 30-90 days. If you have pets, you might lean towards the shorter end of this range.
- More occupants or pets in the house: Consider monthly replacements to manage the additional contaminants.
- For mild allergies: Every 30-60 days might be appropriate.
- High-efficiency filters: Although designed to last longer, check them regularly and consider replacing them every 90 days.

Checking and Changing the Filter
Learning how to check your furnace filter is straightforward. Locate the filter slot in your furnace, remove the filter, and hold it up to the light. If you can’t see light passing through, it’s time for a change. Always ensure that the replacement filter matches the size and type recommended by your furnace manufacturer for optimal performance.
Need help changing your furnace filter or need your furnace inspected in your Edwardsville, IL home? Call Dixon Heating & Conditioning to schedule.