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How do you change an airflow filter?

Published in HVAC Maintenance 3 mins read

Changing an airflow filter, typically referring to a furnace or HVAC filter, is a simple process that significantly improves indoor air quality and system efficiency. Here's a step-by-step guide:

  1. Locate the Return Air Vent(s): These are usually large vents located on walls or ceilings. They are often near the furnace or air handler. You may have multiple return air vents in your home.

  2. Prepare the Area: Vacuum or dust the return air vent cover to prevent debris from entering your system during the filter change.

  3. Open the Air Vent Grill: Most vent covers are held in place by clips or screws. Open or remove the grill to access the filter.

  4. Remove the Old Filter: Carefully slide out the old filter. Note the direction of airflow on the old filter (usually indicated by an arrow). This will help you install the new filter correctly.

  5. Dispose of the Old Filter: Properly dispose of the used filter. Consider sealing it in a plastic bag to prevent dust and allergens from spreading.

  6. Inspect the Filter Area: Before installing the new filter, check the area for any accumulated dust or debris. Clean it with a vacuum if necessary.

  7. Write the Installation Date on the New Filter: Use a marker to write the current date on the new filter's frame. This helps you keep track of when it needs to be replaced. A general recommendation is to replace the filter every 1-3 months, but this depends on factors like pet ownership and allergies.

  8. Install the New Filter: Slide the new filter into the vent, matching the airflow direction arrow on the filter with the airflow direction indicated on the vent or furnace. The arrow should point towards the furnace or air handler.

  9. Close the Air Vent Grill: Secure the vent cover back in place, ensuring it's properly fastened.

  10. Set a Reminder: Set a reminder on your phone or calendar to replace the filter again in the recommended timeframe.

Key Considerations:

  • Filter Size: Make sure the new filter is the correct size for your system. The filter size is typically printed on the side of the old filter.
  • Filter Type: Different types of filters offer varying levels of filtration. Consider a higher MERV (Minimum Efficiency Reporting Value) rating if you have allergies or respiratory issues.
  • System Maintenance: Regularly changing your air filter can prevent dust and debris from building up in your HVAC system, improving its efficiency and lifespan.

By following these steps, you can easily change your airflow filter and maintain a healthy and efficient HVAC system.

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