How (and Why) to Change Your Air Conditioning Filter

Based on the size of the investment you’ve made in top notch indoor air quality, it makes sense that you’ll want to do what you can to help keep it in premier working order. With that goal in mind, nothing does the job better than cleaning or replacing the system’s air conditioning filter every 6 to 8 weeks (on average). It’s a simple task that takes just a few minutes to complete, and yet it can make a world of difference in how your system performs.Changing air conditioning filter

Here’s a step-by-step guide, plus a look at why cleaning or replacing your filter matters so much.

Step-by-Step: Changing Your AC Filter

  1. Shut Down the System
    Always start by turning off your AC at the thermostat. This helps protect both you and the system during the process.
  1. Find the Filter
    In most homes, the filter is located inside the air handler, which is often in the attic, basement, or a utility closet. If you’re not sure where yours is, your system’s manual or a quick web search using your unit’s model number can help.
  1. Remove the Old Filter
    Carefully slide out the used filter. Pay attention to the arrow on the frame—it shows the direction of airflow and will guide you when inserting the new one.
  1. Check the Size
    The size (like 20x25x1) will be printed on the edge of the old filter. Take note of it and consider buying replacements in bulk so you’re ready for next time. 
  1. Insert the New Filter
    Slide the new filter into place, making sure the airflow arrow points in the correct direction.
  1. Turn the AC Back On
    And you’re done! A simple switch-flip at the thermostat gets everything running again.

Here’s Why Having a Clean AC Filter Matters

In addition to keeping dust out of your air handler, the filter plays a key role in energy efficiency, air quality, and long-term system health.

Here’s what can go wrong if it’s neglected:

  • Poor Airflow: A clogged filter limits how much air moves through your system. And the harder the system needs to work to deliver your desired temperature setting, the more you’ll pay for that convenience.
  • Extra Wear on Equipment: Restricted airflow can cause coils to freeze or the system to overheat, adding stress to internal components.
  • Poor Air Quality: Dust, pollen, and pet hair can bypass a dirty filter and circulate through your home, thus causing problems for people who struggle with allergies and asthma.
  • Shorter System Lifespan: All that extra work shortens the lifespan of your system. Regular filter changes help protect your investment.

Keeping Your Home Cool & Clean

For most homes, changing the filter every 1 to 3 months is ideal, depending on system usage, pets, and allergy concerns. And don’t forget – routine maintenance matters, too. So, if it’s been a year or longer since your last preventive maintenance service, contact Optimum Air today for professional treatment and results. We’ll have you AC humming like a well-tuned piano and keeping your family cool and comfortable while enjoying added safety.

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