“Clean Air Guaranteed: Filtrete 12x24x1 Allergen Reduction Filters – 4 Pack”

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Price: $49.99
(as of Mar 08, 2023 12:47:25 UTC – Details)

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AC Filter 12x24x1: Everything You Need to Know

Keeping the air clean and fresh in your home is important for a healthy and comfortable living environment. The AC filter is an essential component that helps to remove pollutants, allergens, and other harmful particles from the air in your home. One of the most common sizes for AC filters is 12x24x1. In this article, we’ll provide a comprehensive guide to AC filters, with a focus on the 12x24x1 size, to help you make informed decisions when choosing the right filter for your home.

Introduction to AC Filters

Air conditioning filters are critical components in your HVAC system that aid in air purification. These filters work by capturing dirt, dust, pollen, smoke, and other airborne irritants that circulate within your AC system. This means that a clean and functioning filter is essential for fresh and healthy indoor air quality. Additionally, using a well-maintained filter helps to increase the longevity of your HVAC system by protecting it from particle buildup that could lead to system failure.

AC filters come in a variety of sizes and materials, but the most common sizes are 12x12x1, 12x24x1, 14x25x1, and 20x25x1. In this article, we focus on the 12x24x1 size as it is one of the most commonly used filter sizes in the market.

Different Types of AC Filters Available

There are different types of AC filters available, and each has its benefits and suitable applications. Here are some of the most popular types of AC filters:

1. Fiberglass filters

Fiberglass filters are the most basic and affordable type of AC filter available. They are constructed with spun fiberglass and have a MERV (Minimum Efficiency Reporting Value) rating of 1 to 4. This means that they can capture less than 20% of airborne particles, which makes them suitable for residential use in low-traffic areas with no pets or smokers.

2. Pleated filters

Pleated filters have a higher MERV rating of 5 to 13, which means that they’re more efficient in capturing airborne particles. These filters can capture dust, pollen, mold spores, pet dander, and smoke. Their pleated design increases the surface area and enables better particle capture.

3. High-efficiency filters

High-efficiency filters have a MERV rating of 14 to 16 and can capture tiny particles such as bacteria, viruses, and microorganisms. These filters are ideal for commercial and industrial applications such as hospitals, clean rooms, and data centers. They have a longer lifespan than other filters but are more expensive.

4. Washable filters

Washable filters are reusable filters that can be cleaned and used several times. They are made of foam or mesh material and have a MERV rating of 1 to 4. Although they are eco-friendly and cost-effective in the long run, they require regular maintenance to ensure their effectiveness.

Benefits of Using the Right AC Filter Size

Choosing the right AC filter size is crucial for effective filtration and efficient system performance. Using the wrong size filter could lead to restricted airflow, energy inefficiency, and decreased air quality. Here are some benefits of using the right size filter:

1. Improved air quality

A properly sized AC filter can effectively capture airborne particles such as dust, pollen, and pet dander that could cause allergies and respiratory problems.

2. Increased energy efficiency

Using the right size filter can significantly reduce your energy bills by improving your AC system’s efficiency. A clogged or too-small filter can restrict airflow, making it harder for your system to cool the air, thereby increasing energy consumption.

3. Extended system lifespan

A clean and properly sized filter can also increase the lifespan of your HVAC system by preventing particle buildup in the coils and mechanical parts that could cause system failure.


1. Why do I need to change my filter regularly?

It is recommended that you change your AC filter every 30-90 days, depending on the type of filter and usage. Regular filter changes help to maintain efficient airflow and healthy indoor air quality.

2. How do I know which filter size to use?

You can check your HVAC system manual or consult an HVAC professional to determine the right filter size for your system.

3. What is MERV rating?

MERV stands for Minimum Efficiency Reporting Value and indicates how efficient a filter is in capturing airborne particles. Filters with higher MERV ratings capture more particles.

4. Can I reuse washable filters?

Yes, washable filters can be reused; however, they require regular cleaning to maintain their effectiveness.

5. How do I install a filter?

To install a filter, turn off the HVAC system, locate the filter slot, remove the old filter, and replace it with a new filter of the correct size, ensuring that it is aligned correctly.


Choosing the right AC filter for your home is crucial for maintaining healthy indoor air quality and efficient HVAC system performance. A 12x24x1 filter size is a common size that is suitable for use in most homes. By understanding the different types of available filters, the benefits of using the correct size, and the importance of regular maintenance, you are empowered to make informed decisions for your home’s air purification needs.

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