“Improve Indoor Air Quality with Glasfloss MERV 10 Air Filters – Made in USA”

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(as of Apr 15, 2023 18:43:34 UTC – Details)

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AC Filter: Understanding the Different Types and How to Choose the Right One

When it comes to air conditioning systems, the AC filter is often overlooked, but it plays an important role in ensuring a healthy and comfortable indoor environment. The AC filter’s primary function is to trap pollutants and contaminants from the air, making it cleaner and healthier to breathe. If you’re in the market for an AC filter or simply want to learn more about them, then this is the article for you. In this post, we’ll discuss everything you need to know about AC filters, their different types, and how to choose the right one for your needs.

Types of AC Filters

There are four main types of AC filters: flat-paneled, pleated, electrostatic, and HEPA. Each has its own unique features, benefits, and drawbacks.

Flat-Paneled Filters

Flat-paneled filters are the most basic and least expensive type of AC filter. They are made of fiberglass or other synthetic materials and are designed to trap large airborne particles such as dust, lint, and pet hair. However, they do not capture smaller particles or allergens, making them less effective for people with allergies or respiratory issues.

Pleated Filters

Pleated filters are more efficient than flat-paneled filters because they are made with more pleats, allowing them to capture more particles. They are also available in different levels of filtration, with a higher MERV rating indicating a higher level of efficiency. However, they may limit airflow and cause your AC system to work harder, reducing its efficiency.

Electrostatic Filters

Electrostatic filters use a static charge to attract and capture particles, making them more effective at capturing small particles and allergens. They are available in both washable and disposable options and are generally more expensive than other types of AC filters.

HEPA Filters

HEPA, or high-efficiency particulate air, filters are the most efficient type of AC filter. They capture 99.97% of particles 0.3 microns or larger, making them ideal for people with allergies, asthma or any other respiratory issues. However, they are also the most expensive and may require modifications to your HVAC system to install.

How to Choose the Right AC Filter

Choosing the right AC filter depends on your individual needs and preferences. Here are some factors to consider when making your selection.

Filter Size

The filter size is crucial when it comes to choosing the right AC filter. Most filters come in standard sizes, but it’s essential to measure your filter before purchasing a replacement to ensure that it will fit your system correctly.

MERV Rating

MERV stands for Minimum Efficiency Reporting Value and is a rating system used to determine a filter’s efficiency. The higher the MERV rating, the more efficient the filter is at capturing particles.


The cost of the filter is an important consideration when making your selection. While the cheapest option may seem appealing, a higher-priced filter may provide better filtration and last longer, ultimately saving you money in the long run.


In conclusion, choosing the right AC filter can have a significant impact on the quality of the air you breathe indoors. Understanding the different types of AC filters and their benefits and drawbacks can help you make an informed decision. Remember to consider the filter size, MERV rating, and cost when choosing the right filter for your needs. With this information in hand, you can ensure that your indoor air quality is optimal, and your AC system is operating efficiently.


Q. How often should I change my AC filter?
A. It’s recommended to change your AC filter every 30 to 90 days, depending on your system’s usage and environment.

Q. Can I clean and reuse my AC filter?
A. It depends on the type of filter. Flat-paneled filters are disposable and should be replaced, while pleated filters and electrostatic filters may be washable and reusable.

Q. What does MERV rating mean?
A. The MERV rating is a rating system used to determine a filter’s efficiency. The higher the number, the more efficient the filter is at capturing particles.

Q. Can a higher MERV rating cause my AC system to work harder?
A. Yes, a filter with a higher MERV rating may reduce airflow and cause your AC system to work harder, potentially reducing its efficiency.

Q. Can using the wrong size filter damage my AC system?
A. Yes, using a filter that is too small or too large for your system can cause damage, reducing its efficiency and increasing energy costs.

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