Choosing the Best AC Filter for Allergy Season

Tips for Finding the Best AC Filter To Keep Allergies at Bay

Indoor air conditioning is a crucial part of nearly every modern home. When the AC isn’t working on a hot summer day, it tends to make homeowners less than happy, to say the least. That is why it is so important to stay on top of regular AC maintenance to ensure the AC is always running correctly and efficiently for the hot summer months. Part of ensuring this efficiency is buying the right air filter and replacing it on time. When the air filter goes too long without getting replaced, it can lead to breakdowns in the overall system. 

The air filter should be replaced every two to three months, depending on how many people and pets are in the home. Of course, it also depends on what type of air filter is being used to begin with. Below is more information on three of the most popular types of air filters on the market today. 

Info on Fiberglass Filters


Fiberglass filters are by far the most common and least expensive air filters on the market. They are available at nearly every grocery and home appliance store and can usually be found for five dollars or less. Most homeowners tend to buy this type of air filter for their AC unit, namely because of the price. Air filters need to be replaced relatively often, which is the main reason why homeowners favor this type of filter. 

That said, fiberglass filters don’t rank very high on the Minimum Efficiency Reporting Value (MERV) scale. In other words, they don’t catch nearly as many particles as other air filters do. It is likely that homeowners will still experience allergy symptoms when using this type of filter. 

Are Washable and Reusable Filters Worth It?

Washable/reusable air filters, also known as electrostatic air filters, are highly beneficial to the environment. They are perfect for the homeowner that can only commit to the fiberglass air filter price range because, over time, it ends up saving them money! 

The main reason why this air filter is a better alternative to the fiberglass filter is that it is basically the same type of filter. The electrostatic filter measures the same on the MERV scale, but the homeowner can get away with buying one air filter a year rather than four. All they have to do is wash the air filter and let it dry every couple of months, and it works like a brand new filter once again!

The Famous HEPA Filter

HEPAHEPA filters are usually the air filter that HVAC technicians recommend to their customers. High-Efficiency Particle Air (HEPA) filters cost more than the average air filter, but it also tends to clean the air a lot better. To compare, this type of air filter measures two to three times higher on the MERV scale than the above-stated filters. It also works hard to catch small particles as well as large particles, while the others only catch the large particles in the air. 

Some benefits include: 

  • Reduced allergy symptoms
  • Aid in breathing comfort
  • Can remove things like dust mites, pollen, and mold spores from the air

The only downside to this type of filter is that if the air is humid in the home, the moisture can get trapped inside the folds of the filter and actually allow for mold growth to occur. It is crucial to ensure these filters stay dry and are changed regularly to avoid this problem. 

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