AC Filter Replacements

Every household is different, with unique indoor comfort needs and goals. The frequency of changing the air filter in your AC system depends on several factors, including the type of filter, the environment, and usage. However, as a general guideline, it is recommended to change the air filter every 1 to 3 months.

If you have a standard fiberglass filter, it is advisable to replace it every 1 to 2 months. These filters have a lower efficiency in capturing smaller particles and tend to clog up more quickly.

For pleated filters or higher efficiency filters like HEPA filters, a replacement interval of 2 to 3 months is often suitable. These filters have better particle capture capabilities and can last longer before requiring replacement.

However, certain factors may increase the frequency of filter changes. If you have pets, live in a dusty environment, or experience higher levels of allergens, more frequent filter changes may be necessary.

Regularly inspecting the filter is essential. If the filter appears dirty or clogged before the recommended time frame, it should be replaced promptly to maintain proper airflow and system efficiency.

To determine the best AC filter for your home and your budget, you will need to consider your household’s needs. 

Fiberglass AC filters are the most common. They offer the best airflow and can trap particles as small as ten microns. Fiberglass filters will typically need to be replaced every month.

Pleated filters are the recommended option for greater performance. These filters can capture particles as small as three microns (which is about the size of a mold spore), which makes them more efficient at delivering cleaner and healthier indoor air. And with the greater surface area of pleated filters, it means they are also able to trap a larger amount of dirt, dust, and debris with less frequent replacement—you can usually replace pleated filters every three months.

Are you thinking of using HEPA filters? If you have more sensitive household members, this may seem like a smart move. However, keep in mind that HEPA filters are the most restrictive to airflow. An average residential HVAC system will not be able to handle the high efficiency performance of a HEPA filter, which is why these filters are best used in commercial settings.

For homeowners, a pleated filter is typically the most cost-effective choice.

There are several signs that indicate your AC air filter may need replacing:

• Visual Inspection: Take a look at the air filter. If it appears dirty, clogged, or covered in dust and debris, it is likely time for a replacement.

• Reduced Airflow: If you notice a decrease in airflow from the AC vents, it could be due to a clogged filter impeding proper air circulation.

• Increased Energy Bills: A dirty filter can make your AC system work harder to maintain desired temperatures, resulting in higher energy consumption and increased utility bills.

• Dust Buildup: Excessive dust accumulating on surfaces in your home, even after cleaning, can be a sign that your filter is no longer effectively capturing airborne particles.

• Allergy Symptoms: If you or your family members experience worsened allergy symptoms, such as sneezing, coughing, or itchy eyes, it may indicate that the filter is no longer effectively removing allergens from the air.

It is important to note that these signs may vary depending on the specific AC system and environmental conditions. Regularly checking and replacing the air filter according to manufacturer recommendations or when any of the above signs are evident will help maintain optimal air quality and system performance.

If you don’t change your air conditioner filter regularly, several negative consequences can occur:

• Reduced Airflow: A clogged or dirty filter restricts the flow of air through the system. This reduces the efficiency of the AC unit and leads to decreased airflow into your living spaces, making it harder for your home to reach the desired temperature.

• Poor Indoor Air Quality: The primary purpose of an air conditioner filter is to capture airborne particles and contaminants. If the filter is not replaced, it becomes less effective over time, allowing dust, allergens, pet dander, and other pollutants to circulate freely in your home. This can lead to poor indoor air quality, triggering allergies, respiratory issues, and discomfort.

• Increased Energy Consumption: A dirty filter forces your AC unit to work harder to push air through the system. This extra strain on the system consumes more energy, leading to higher electricity bills.

• Potential System Damage: A severely clogged filter can cause the AC unit to overheat and potentially lead to system malfunctions or breakdowns. It puts strain on the blower motor and other components, increasing the risk of costly repairs or premature system failure.

To avoid these issues, it is important to regularly change your air conditioner filter according to manufacturer guidelines or as recommended by HVAC professionals.