WE ARE OPEN! All filters are made in the USA in our Alabama warehouse.

20x25x1 Air Filter

AC Furnace Air Filter 20x25x1-Inches

1. Select Filter Quality

Odor Eliminator

2. Select Quantity

${{ money(priceWithoutDiscount()) }} Save ${{ money(savePrice()) }} ({{ savePercent()}}%)

Out of stock

Product Description

Brand: Filter King
Filter size: 20x25x1
Actual Size: 19.75 x 24.75 x .75
1-Inch Filter
MERV 8 Filter Rating
Protection From: Pollen, Dust, Mold, Dust Mites, Bacteria, Pet Dander, Smoke, Viruses
Residential / Commercial Use

Manufactured in the US

20x25x1 Air Filters

Furnace Filters 20x25x1

The Filter King 20x25x1 air filter is among the most common since they are a regular size filter used in an air system. They prevent harmful airborne particles from entering your home or office. It fits into your HVAC system to treat incoming air before it makes its way into your living space.

The Filter King 20x25x1 filter ensures that the air you breathe is clean and free of allergens or contaminants. We offer three MERV ratings to choose from. This makes it easy for you to choose the right protection level for you and your loved ones.

100% Made in the USA

All Filter King filters are made in the USA to ensure you always receive a high-quality product. Our warehouse in Alabama lets us offer fast shipping and easy returns to customers throughout the lower 48.

Fast Shipping Guaranteed

Filter King offers quick shipping so you can improve your home’s air quality as soon as possible. When you order two or more filters, you can get free shipping on your order inside the contiguous United States. International orders and orders from Hawaii and Alaska require a custom freight quote.

For orders within the U.S., most filter sizes ship within two business days. You’ll receive your FedEx Home Delivery within five business days of shipment. You can return most sizes within 30 days of purchase. Custom filters cannot be returned.

Is It Time to Change Your AC Filter 20x25x1?

There’s no exact time frame for changing your air filter. How often you need to replace your air filter depends on air and filter quality.

Over time, trapped contaminants build up within the filter, which blocks airflow. This affects your filter’s efficiency. It also causes your HVAC system to work harder. The additional strain on the system leads to higher energy bills. Without proper maintenance, it can impact your HVAC unit’s lifespan.

Filter King air filters can last up to three months before you need to replace them. If you live in a home with pets or anyone with more frequent replacement may be necessary. Signs it’s time for filter replacement include:

  • Abnormally high energy bills
  • Visible debris or dirt covering the filter’s surface
  • Dust build-up around the home.
  • Burning smells around your HVAC system

MERV Rating: Which Should You Use?

The Minimum Efficiency Reporting Value, or MERV, is how filters are categorized. Developed by the American Society of Heating, Refrigeration, and Air Conditioning (ASHRAE), it is the only nationally regulated independent filtration system. The MERV rating is a consumer standard that ensures all filters with the same rating filter the same way.

The higher the MERV rating, the more contaminants the filter can block. Lower ratings filter dust and dirt. Filter King offers 20x25x1 air filters in MERV 8, 11, and 13. We also offer a carbon filter to eliminate odors.

4-6 Rating: Recommended For Industrial Workplaces

Removes pollen, dust mites, carpet and clothing fibers, cockroach waste, cement dust, hair spray, etc.

Here at Filter King, we don’t recommend using MERV ratings 4-6 for home use. However, they are the right choice for environments that need little filtration, such as industrial workplaces. You can find these filters in both washable and disposable forms. They are the cheapest options on the market.

8-13 Rating: Recommended For Home Use

Removes pet dander, lead dust, Legionella bacteria, milled flour, welding fumes, dust from humidifiers and nebulizers, coal exhaust, smog

The air filters best for homes use fall within the MERV 8-13 rating. In addition to residential use, they are sufficient for commercial use. Depending on your home environment, you may want to consider different ratings.

Good: MERV 8 Filter

At a minimum, MERV 8 filters are appropriate for the majority of homes. MERV 8 filters are best for those living without pets, asthma, or allergies.

Better: MERV 11 Filter

One step higher than the MERV 8, the MERV 11 is a mid-level filter. It can remove more contaminants, such as allergens and pet dander. It is the best choice for people with pets or those living with allergies or asthma.

Best: MERV 13 Filter

For those living with severe breathing issues, such as COPD, asthma, lung disease, chronic bronchitis, or a compromised immune system, a MERV 13 filter offers the highest filtration levels.

14 - 20 Rating: Recommended For Hospital & Laboratories

Removes bacteria and viruses, sneeze and cough droplets, auto emissions and fumes, tobacco smoke, insecticide dust, face powder, microns, radon, carbon dust, salt, lint, etc.

Filters in the MERV 14-20 range are best for environments that need to be incredibly clean, such as hospitals, manufacturers, laboratories, etc. These filters are necessary for home environments, and it’s unlikely you’ll find one that’s small or affordable enough to use in your home. We do not recommend them for residential use as they can increase your energy bills dramatically.

FAQs: Common Questions

Below are a few commonly asked questions about our 20x25x1 air filter.

When Should I Change an Air Filter?

Most residential filters last three to five months before you need to replace them. When you start to notice your indoor air quality decline, it’s time for a replacement. To stay safe, you can take advantage of our filter delivery subscription service so that you receive clean replacement filters on a schedule to ensure clean air year-round.

What MERV Rating Filter Should I Pick?

The best option we offer is the Titanium MERV 13 20x25x1 air filter, but this is often overkill for the typical home. It’s only necessary when someone in your family deals with severe breathing issues and other health conditions. Healthy individuals without pets will be fine with a MERV 8, while people with pets or mild health issues affecting breathing should go with a MERV 11.

Do You Have Warranty on Your Filters?

We accept returns on our standard filters within 30 days of purchase. Custom-ordered filters are not eligible for return.

Do You Offer Discounts on Bulk Purchase?

Filter King offers discounts on bulk purchases for all of our 20x25x1 air filters. You can buy 1-6 or 12 filters at once with a significant discount. Ordering more than two filters qualifies you for free shipping as well if you are in the contiguous United States.

How Long Does the Shipment Take?

For orders of our standard-sized filters, your order will leave our Alabama warehouse within two business days. Custom filter orders ship within five business days. You’ll receive tracking information immediately after shipment. Typically, you will receive your order within five business days of shipment. International orders will take longer and vary based on customs and other factors.

Filter King: Air Filter Delivery Service

It’s easy to forget to replace your filters. That’s why we offer a hassle-free 20x25x1 air filter subscription, so you never forget again. Simply choose your correct filter size, your preferred delivery frequency, and we’ll handle the rest.