Air filters may seem like a minor component of your AC and heating system, but they play a major role in your home’s comfort, efficiency, and air quality. Their primary job is to trap dust, pollen, pet dander, mold spores, and other airborne particles before they can circulate through your vents or clog your equipment. By filtering the air before it reaches your system’s internal components, they help keep everything running smoothly while reducing the spread of allergens throughout your home.

However, air filters don’t last forever. As they collect debris, they become increasingly clogged, which restricts airflow and forces your system to work harder to maintain the desired temperature. This added strain can lead to a noticeable drop in performance, higher energy usage, and even premature wear on critical parts like the blower motor or evaporator coil. Over time, neglecting your air filter can contribute to poor indoor air quality, uncomfortable rooms, and costly breakdowns.

How often should I change my air filters?

When to Change Your AC and Heating Filters

Every home is different, and there’s no one-size-fits-all rule when it comes to air filter replacement. That’s why our team at Shalom Heating & Air takes the time to evaluate your home’s unique conditions before recommending a schedule. From lifestyle habits to system usage, several variables influence how quickly your filters become dirty. Some households may go three months or longer between changes, while others need monthly replacements to maintain clean, healthy airflow. Based on years of hands-on experience and industry best practices, here are some general filter change guidelines we use to help homeowners keep their systems running smoothly:

  • Every 3 Months (Standard): This is the general recommendation for most homes with basic 1-inch filters and average usage.

  • Every 1–2 Months (High-Use Homes): If you run your system frequently—especially in hot summers or cold winters—filters can clog faster and should be changed more often.

  • Monthly (Allergies or Pets): If you have pets, allergies, or respiratory sensitivities, it’s a good idea to replace your filters every 30 days to maintain clean indoor air.

  • Every 6–12 Months (High-Efficiency Filters): Some thicker, pleated, or media filters last longer and can be changed every 6 to 12 months—but only if indoor air quality is good and usage is moderate.

What Happens If You Don’t Change Your Filter Regularly

Failing to replace your air filter on time may seem like a small oversight, but it can lead to a wide range of problems that affect not only the performance of your AC and heating system but also the health and comfort of everyone in your home. As the filter becomes clogged with dust, dirt, and airborne contaminants, it restricts airflow and reduces your system’s ability to function efficiently. This added strain can shorten the lifespan of vital components, increase your utility bills, and result in uneven temperatures throughout your home. Worse yet, a dirty filter allows pollutants like pollen, pet dander, mold spores, and bacteria to circulate freely in your indoor air, which can aggravate allergies, asthma, and other respiratory conditions. Simply put, overlooking regular filter changes can compromise your comfort, your system, and your health—all at once.

  • Decreased Airflow: A clogged filter restricts airflow, forcing your system to work harder.

  • Higher Energy Bills: Reduced airflow leads to longer run times and increased power usage.

  • Dust Buildup: Dust and debris can accumulate inside your ductwork, vents, and living space.

  • System Strain or Breakdown: Long-term neglect can damage motors, coils, and other components.

  • Poor Indoor Air Quality: Dirty filters allow allergens, bacteria, and pollutants to circulate in your home.

Changing your filter regularly is one of the simplest and most cost-effective ways to keep your comfort system running efficiently and to protect your indoor air.

How to Know It’s Time to Replace Your Air Filter

Not sure when your filter was last changed? Here are signs it may be overdue:

  • You see visible dirt or dust on the filter

  • Your home feels stuffy or dusty

  • Allergy symptoms are worse than usual

  • Energy bills have increased without explanation

  • Your AC or furnace seems to run longer than normal

If any of these apply, it’s time to check your filter—or better yet, schedule a visit from a trusted technician.

Let Shalom Heating & Air Help Keep Your Air Clean

At Shalom Heating & Air, we go beyond just installing AC and heating systems—we help you maintain them too. Whether you need help selecting the right filter, setting a change schedule, or checking your system’s performance, our technicians are here to help.

Not sure what kind of filter your system uses or how often you should be replacing it? Give us a call today and schedule an appointment with a qualified AC installer from our team. We’ll ensure your air is clean, your system is protected, and your comfort is uninterrupted.