Most homeowners do online research, often to learn how to change the AC’s air filter. You’ll most likely find a bunch of basic information about different filter types. Most people don’t consider that their household’s cooling and lifestyle habits determine how often to change the filter.

Understanding the Different Filter Types

Not all cooling systems can work with every filter type. And if you try to use an incompatible one, it can damage the equipment. For most standard systems, a 1- or 2-inch filter is the most commonly recommended. If you’ve upgraded your home with a high-efficiency system, it may have the cabinet space needed to support a 4-inch or 5-inch filter.

Ductless mini-split systems don’t have filters that need to be changed every few months. Instead, homeowners must wash the filter. Most mini-split filters last 5 to 10 years before needing a replacement. No matter your HVAC setup, you always want to make sure you’re using the right filter type. You don’t want to damage the equipment accidentally.

• 1-inch pleated filters: Replace every 30 to 90 days
• 2-inch pleated filters: Replace every 60 to 120 days
• 4-inch media filters: Replace every 6 to 12 months
• 5-inch media filters: Replace every 9 to 12 months
• Washable ductless mini-split filters: Clean every 2 to 4 weeks
• High-MERV filters: Replace every 2 to 6 months

Factors That Affect How Often to Change the Filter

If you’re a person who stays warmer than most, you likely have your thermostat set to a lower temperature. This means the AC will cycle on more frequently, so you’ll likely need to change the air filter more often. If you don’t, the system runs with a clogged filter, increasing wear and tear on the equipment. It will also cause more harm than good for the home’s indoor air quality.

Here are some other scenarios that may warrant changing the air filter more often:

• Heat waves
• Indoor pets that shed
• Wildfire smoke in the area
• Home renovation or remodeling projects
• Family members with allergies or asthma
• Living near gravel roads or construction sites
• Recently moving into a new home

Scheduling annual maintenance for your AC is a great way to make sure you’re using the correct filter. You can speak to a technician during the furnace tune-up. You can discuss if you are on a good filter replacement schedule. A HVAC technician will be happy to answer any questions you have about filter selection, replacement intervals, and overall indoor air quality. If you live in Bensalem, PA or a surrounding area and need AC services, make your first call to Hughes HVAC.