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21.5×23.25×1 – Merv 11

21.5×23.25×1 – Merv 11
AC Furnace Air Filter
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Product Description

Filter Size: 21.5×23.25x1A

Actual Size: 21.5×23.25×1

Actual Size Fraction : 21-1/2×23-1/4×1

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Shop 21.5×23.25×1 Air Filters Online

A good air filter is a must-have for anyone who cares about the quality of the air in their home or office. Custom Filters Direct 21.5×23.25×1 air filters are the perfect solution to keep almost all dust and other impurities at bay. They are able to capture a large number of fine particles and debris from the air. This can help to protect you and your family from exposure to harmful particles in the air.

Air filters are also important for people with allergies or breathing conditions such as asthma or COPD. If you live in a heavily trafficked area, using our air filters will help keep allergens out of your home.

Custom Filters Direct 21.5×23.25×1 air filters are made in the USA, using the highest quality materials that will keep your home safe from allergens, viruses, bacteria, and other harmful toxins. They come with a robust construction which makes the filters last longer and work efficiently during the peak seasons.

However, all these air filters require periodic replacement to ensure you can maintain a clean, healthy environment. The dirty air filters will restrict the airflow and will not properly filter the air before they are circulated throughout our homes, resulting in pollutants getting into our bodies and making us sick over time. That means replacing the air filter on time is the best way to enjoy clean air to breathe every day while avoiding costly HVAC repairs.

Select the Right MERV Rating


These AC and furnace filters provide exceptional air filtration for residential users. MERV 8 filters trap 85% of harmful contaminants ranging between 3.0-10.0 microns.


These filters are designed to help you maintain a healthier home and office environment. MERV 11 filters remove more than 85% of harmful contaminants ranging between 3.0-10.0 microns and 50% of the 1.0-3.0 micron particles.


MERV 13 filters promote superior filtration as they capture the majority of the tiniest particles present in the air. These can be used in any residential, commercial, and industrial areas where superior air filtration is required.

21.5×23.25×1 Air Filters Delivery Services

Do you think it’s time to replace your air filters? You can rely on the fast and on-time delivery services of Custom Filters Direct. We offer an auto-delivery subscription service, so you’ll never forget to change your air filters again. All you need to do is to select the number of filters you need and how often you need them. We will deliver the same number of filters, right when you need them. We also offer a one-time delivery service and special discounts on bulk orders of 21.5×23.25×1 filters. Place your order now!