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21x22x1A – Merv 11

21x22x1A – Merv 11
AC Furnace Air Filter
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Product Description

Filter Size: 21x22x1A

Actual Size: 21x22x1

Actual Size Fraction : 21x22x1

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Choose 21x22x1A Air Filters Online

Custom Filters Direct 21x22x1A air filters are made in the USA and provide protection against many airborne particles that can aggravate seasonal allergies. These air filters will fit perfectly into your HVAC system to provide high-efficiency filtration and guaranteed odor control. Designed to last longer than standard air filters, our 21x22x1A air filters come at a price that you will not find anywhere else.

Designed with 100% synthetic filter media, these AC and furnace air filters create greater surface area for odors, fumes, and other contaminants to adhere to, and are resistant to moisture and microbial growth. Though our air filters are second to none when it comes to quality, eventually they need regular maintenance. Over time, pollutants begin to accumulate on the surface, resulting in less efficient filtration, and clogging. So, it is necessary to keep the filters replaced, and they usually should be replaced every 2-3 months for the best results.

MERV Rating 8,11,13: Which one should you choose?


These filters are perfect for those who don’t live near smoke pollution or don’t live with pets. Our MERV 8 filters remove 85% of harmful contaminants ranging between 3.0 to 10.0 microns.


These filters remove a 85% of microscopic airborne contaminants (3.0-10.0 microns) including mold spores, lead dust, welding fumes, car fumes, humidifier dust, and other machinery fumes and emissions. They are commonly used for commercial and residential buildings that require above-average air quality.


These AC and furnace air filters offer superior filtration by removing 90% of particles ranging between 3.0 to 10.0 microns and will also capture 75% of contaminants down to the 0.3-micron level.

21x22x1A Air Filters Delivery

Custom Filters Direct 21x22x1A air filters offer premium quality air filteration at affordable prices. We offer huge discounts on bulk orders, making it a smarter choice to purchase all the air filters you need for your home or office at once. We also offer a subscription service, so you get new filters delivered to your doorsteps every month. Order now and enjoy fresh, clean air throughout your home today!