How Often Should I Replace My Air Filter?

Replacing the filter in a central air system is an important part of maintenance as it keeps the indoor air clean, and the nice thing is that you can do it yourself. As for the frequency, that depends on a few factors.

Two Types of Air Filters

Different types of air filters have different MERV ratings. MERV stands for Minimum Efficiency Reporting Value, and it rates the effectiveness of filters on a scale from 1 to 16. In short, the higher the rating is, the more particles, as well as the finer particles, the filters can trap.

Generally, homeowners only need to consider two types of filters:

  • Fiberglass air filters

  • Pleated air filters

Fiberglass filters have a MERV rating between 1 and 4 and can trap large particles of dust and dirt but not, for example, allergens. These “throwaway filters” must be replaced every 30 days before they start to compromise the airflow.

Pleated filters have a MERV rating ranging from 5 to 8 and can trap much more thanks to the greater surface area that the pleats, or folds, create. These should be replaced between 60 and 90 days.

Air Quality

Replace your filters with more frequency if you have pets, live with someone who smokes, or other external factors are compromising the air you breathe. You should also replace the filters sooner if someone in your home suffers from allergies or a respiratory condition. To filter out cigarette smoke, you could choose a filter with a MERV rating between 9 and 12, such as a rigid cell filter.

Bottom line: Set a reminder on your phone to swap out your filter every 30 to 90 days. This will go a long way toward improving HVAC performance and maintaining clean indoor air. For all of your heating and cooling needs, contact (256) 353-0051.

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Expert Plumbing & HVAC Service in Decatur, AL

Lightning-Fast Service in Madison, Morgan & Limestone Counties

When you need a trusted plumber, HVAC technician, or electrician, turn to Jackson Plumbing, Heating & Cooling—Northern Alabama’s leading home services provider since 1987. With decades of experience, we take pride in delivering expert solutions with reliability, professionalism, and a commitment to our community. Our team understands the importance of dependable service, ensuring every job is done right the first time. Whether it’s a minor repair or a major installation, you can count on us to keep your home running smoothly.

At Jackson Plumbing, Heating & Cooling, your comfort is our top priority. We’re committed to keeping your home’s essential systems running smoothly every day. Homeowners across the Decatur area choose us because we:

  • Have the expertise and equipment to handle any job: Our skilled team is equipped with the latest tools and industry knowledge to tackle any plumbing, heating, cooling, or electrical issue.

  • Maintain professionalism at all times: We follow a strict no-profanity policy and uphold the highest standards of respect and courtesy in every interaction.

  • Prioritize your safety: Every team member undergoes thorough drug testing and background checks for your peace of mind.

  • Are local and always ready to help: As a trusted local business, we’re nearby and ready to respond promptly to your needs.

  • Stay ahead with ongoing training: Our technicians receive continuous training to stay updated on the latest techniques and industry advancements.

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At Jackson, we’re more than just a service provider—we’re a team of dedicated professionals committed to delivering quality results at fair and transparent rates.

Contact the Jackson team today to schedule an appointment for plumbing, heating, AC, or electrical services in Madison, Limestone, or Morgan County.

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