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21x22x1 – Merv 11

21x22x1 – Merv 11
AC Furnace Air Filter
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2 $0.00
3 $0.00
4-5 $0.00
6-11 $0.00
12+ $0.00

Product Description

Filter Size: 21x22x1

Actual Size: 20.5×21.5×1

Actual Size Fraction : 20-1/2×21-1/2×1

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Order 21x22x1 Air Filters Online

Custom Filters Direct 21x22x1 air filters are one of the most important parts of your home’s air system. They trap dust and particles that could be hazardous to your health and help reduce allergies by keeping pollen, mold, pet dander, and other airborne irritants out of the air you breathe. These filters also help to remove odors and keep your HVAC system running at peak performance.

By placing Custom Filters Direct 21x22x1 air filters within your HVAC system, you can block more than 90% of harmful particulates along with viruses and bacteria that trigger allergy symptoms. The result is high indoor air quality while reducing the risk of breathing problems.

All our AC and furnace air filters are 100% made in the USA with the highest quality material. They trap dirt and debris from the air before it reaches your lungs. This helps protect you from exposure to dangerous particles that can cause all sorts of health problems, including asthma attacks and respiratory infections.

Air filters can also play a role in indoor environmental health if they’re not replaced every 2-3 months. In regular use, they can become clogged with dust and debris over time. If this happens, the filter may not be able to effectively block allergens from entering your home. When you notice a drop in energy efficiency or an increase in the smell of mold or mildew in your home, it’s time to replace your air filter. If you have pets or little ones in the house, it’s especially important to change your air filter often.

Select the right MERV rating


These AC and furnace filters trap 85% of harmful particles 3.0-10.0 microns in size. MERV 8 filters are specifically designed for standard residential environments.


MERV 11 air filters will eliminate more than 85% of harmful contaminants sized 3.0-10.0 microns. Plus, they will also trap 50% of particles 1.0-3.0 microns in size.


MERV 13 air filters capture more than 90% of particles 3.0-10.0 microns in size and 75% of particles 0.3 – 1.0 microns in size. These air filters are an ideal choice for hospitals, pharmaceutical plants, and other places where a higher level of filtration is required.

21x22x1 Air Filters Delivery Services

Custom Filters Direct premium 21x22x1 air filters are available to maintain indoor air quality. We offer a subscription service to deliver a pack of new filters to your address at an interval of your choice. We deliver air filters in packs of 4, 6, 12, and more. One-time delivery on air filters is also available. You can also place a bulk order for 21x22x1 air filters and get huge discounts. So, place your order today!