Is It Time to Replace Your HVAC Air Filters?

In this brief article brought to you by Aire Serv, we take a look at the timeline for one of the most integral HVAC maintenance tasks: changing the air filters. If you'd rather consult with an HVAC professional, then call Aire Serv. Our technicians can handle everything from routine service to a complete furnace replacement.

The General Rule of Thumb: 1–3 Months

For most HVAC systems and homes, replacing the air filter every 1 to 3 months is a solid rule. Even within that window, however, the timing can vary depending on a few important factors:

• Pets: If you’ve got furry friends at home, all that hair and dander clogs filters quickly. Monthly changes are often necessary.
• Allergies or Asthma: A dirty filter can worsen symptoms, so aim for a more frequent replacement schedule.
• High Usage: Your system runs more, and pulls in more dust, in peak heating and cooling months.
• Type of Filter: Some filters are rated for longer performance, but don’t take that at face value.

When in doubt, however, check your filters with your own eyes. Check them monthly, especially in the peak seasons.

Visual Clues: Look Before You Breathe

Even if you forget how long it’s been, your filter will tell you when it’s time. Take it out and hold it up to the light. If you can’t see light passing through the material, or if it’s clearly coated in dust and debris, then bring out the new filters. Other signs that you're overdue for a filter change include:

• Dust buildup on vents and surfaces
• A musty smell when the system kicks on
• Uneven heating or cooling
• Increased sneezing or coughing indoors

These are warning signs that your filter is no longer doing its job - and that your HVAC system might be overcompensating to maintain airflow.

What a Dirty Filter Really Costs You

Changing dirty filters is a simple way to avoid complicated problems. In fact, it’s easy to underestimate what a clogged filter does to your HVAC unit. It restricts airflow, forcing your blower motor to work harder and longer. Over time, that added strain can cause overheating, premature part failure, or even complete system breakdowns.

Replacing the filter doesn’t just help the air stay clean; it reduces wear and tear on essential components, such as the blower motor, heat exchanger, and evaporator coil. All of these are expensive parts. Don't wait until you need a premature replacement. Handle maintenance and repairs as soon as possible.

PRO TIP: If your filter seems to get dirty very quickly, it could be a sign your ducts need professional inspection or air duct repair. Leaky or dusty ducts can pull in debris from attics or crawlspaces.

Time to Change More Than the Filter?

If you've been changing the filters in the same HVAC system for over 20 years, then it might be time to change the unit itself. Older systems typically have poor energy efficiency, and the long-term savings on your energy bills might be enough to pay for the upgrade.

When you choose Aire Serv for your furnace replacement, you get quality service with upfront pricing. Plus, you can rest assured we back our workmanship with a guarantee. If you have issues in that time, you are invited - and even encouraged - to call our office and let us know. We'll make our wrong right - no runarounds.

Aire Serv is a licensed and insured HVAC company with a commitment to serving our community with quick, quality, and affordable service. Our live representatives and dedicated technicians are here to take your call or message today.