What Are the Most Common Types of 20x25x1 Air Filters?

When it comes to keeping your home's air clean and healthy, air filters are an essential part of any HVAC system. The size of these filters is often expressed in terms of length, width, and depth – for example, a 20x25x1 air filter. But what types are available in this size? Here’s a look at the most common varieties.

Fiberglass Disposable Air Filters

Fiberglass disposable air filters are the most commonly used type for residential HVAC systems. They can trap larger particles such as dust and pollen but may not be as effective at capturing smaller particles like smoke or pet dander. These come in many sizes, including 20x25x1, and should be replaced every 30 to 90 days depending on the level of contaminants present.

Pleated Air Filters

Pleated air filters offer more efficiency than fiberglass disposable ones and can capture smaller particles like pet dander, mold spores, and smoke. They also last longer than fiberglass disposable ones – up to three months – and come in various sizes, including 20x25x1. Although they cost more than fiberglass disposables, they provide better filtration.

High-Efficiency Particulate Air (HEPA) Filters

HEPA filters are the most efficient type available for residential use. They can trap particles as small as 0.3 microns, which is much smaller than other types, making them ideal for people with allergies or asthma. HEPA filters come in many sizes, including 20x25x1, and can last up to one year before needing replacement.