Everything You Need to Know About 16x25x4 Air Filters

When it comes to air filters, 16x25x4 air filters are one of the most popular sizes. They are used in many HVAC systems and air purifiers, and they come in a variety of materials, MERV ratings, and styles. But what exactly are 16x25x4 air filters, and why should you choose them over other sizes? In this article, we'll discuss the basics of 16x25x4 air filters, including their size, MERV rating, materials, and more. We'll also cover when and why you should replace them, as well as the different types of 16x25x4 air filters available.

What Are 16x25x4 Air Filters?

16x25x4 air filters are a type of filter that is typically used in HVAC systems and air purifiers.

The “16” refers to the width of the filter, the “25” refers to the length of the filter, and the “4” refers to the nominal thickness of the filter. The nominal size is not always the same as the actual size; for example, a 16x25x4 filter may actually measure 15.5” x 24.5” x 3.75”.

What Is a MERV Rating?

The MERV rating is a measure of a filter's ability to capture particles from the air. The higher the MERV rating, the better the filter is at capturing particles such as dust, pollen, pet dander, mold spores, and smoke particles.

Common MERV ratings for 16x25x4 air filters include MERV 8, MERV 11%, and MERV 13.

What Materials Are Used in 16x25x4 Air Filters?

The most common materials used in 16x25x4 air filters are fiberglass and pleated filters. Fiberglass filters are made from synthetic fibers that are woven together to form a mesh-like material. Pleated filters are made from a combination of paper and synthetic fibers that are pleated together to create a larger surface area for capturing particles.

When Should You Replace Your 16x25x4 Air Filter?

It's important to replace your 16x25x4 air filter regularly to ensure that your HVAC system is running efficiently and effectively. Generally speaking, you should replace your filter every three months or when it starts to show signs of wear and tear.

If you have an electrostatic filter, you can clean it instead of replacing it.

Types of 16x25x4 Air Filters

There are several types of 16x25x4 air filters available on the market today. Filter King offers a variety of washable and reusable air filters in this size, including their 4-inch thick Filter King E-11 material with a MERV 11 rating. FilterBuy also offers pleated air filters in this size with a MERV 8 rating. Filtrete Allergen Defense also offers a Filtrete 16x25x4 (SlimFit) 1-inch air filter with a MERV 11 rating.

Benefits of Using 16x25x4 Air Filters

Using 16x25x4 air filters has several benefits for your HVAC system and your home's air quality. These filters have higher efficiency than 1-inch or 4-inch filters, which means they can capture more dust particles, smoke particles, pet dander particles, pollen particles, and smog particles from your home's air. They also have higher airflow than other sizes, which means they can help improve your HVAC system's performance.


16x25x4 air filters are an essential part of any HVAC system or air purifier.

They come in a variety of materials and MERV ratings to suit your needs, and they can help improve your home's air quality by capturing dust particles, smoke particles, pet dander particles, pollen particles, and smog particles from your home's air. When it comes time to replace your filter, be sure to consult with your HVAC technician or do some research online to find the best option for your needs. Whether you choose a washable electrostatic filter or a disposable pleated filter, using 16x25x4 air filters can help keep your home's air clean and improve your HVAC system's performance.

Jason Voisin
Jason Voisin

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