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13×21.5×1 – Merv 13

13×21.5×1 – Merv 13
AC Furnace Air Filter
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Product Description

Filter Size: 13×21.5x1A

Actual Size: 13×21.5×1

Actual Size Fraction : 13×21-1/2×1

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Shop 13×21.5×1 Air Filters Online

Custom Filters Direct 13×21.5×1 air filters produce better indoor air quality for everyday families and co-workers by capturing the most unwanted airborne particles from your spaces. These filters have a lower pressure drop, minimizing energy consumption while maintaining a high dust holding capacity.

Designed with tight mesh weaving, these HVAC filters are affordable and easy to install in almost any HVAC unit and work as a protection layer against nuisance contaminants. Those who suffer from seasonal allergies or have breathing issues should use Custom Filters Direct 13×21.5×1 air filters as this is the best way to eliminate more than 90% of the harmful particles like pollen, mold, bacteria, viruses, smog, pet dander, and more.

The effective life of your 13×21.5×1 AC and furnace air filters depends on both the inside and outside conditions. One of the best and easiest ways to care for the indoor environment and your HVAC system is to change your air filter on a regular basis. When you change air filters regularly, your HVAC units work efficiently and help you enjoy clean, healthy air every day.

MERV 8, MERV 11, MERV 13 Rated 13×21.5×1 Filters


MERV 8 filters are more affordable and will effective at catching up to 85% of the airborne particles ranging between 3.0 – 10.0 microns in size. These AC and furnace filters are actually good enough for the residential area.


These filters are efficient at capturing more than 85% of the largest particles, as well as 50% of the smaller ones. If you have pets or someone in your family has moderate allergy issues, these air filters will be much more effective at cleaning your indoor air.


These air filters are highly effective at removing more than 90% of microscopic particles including smoke, bacteria, and viruses.

Change Your Air Filters Without the Hassle

We are pleased to offer quality air filters that can capture pollutants and particles while pushing clean, fresh air into your living space. Custom Filters Direct offers you two different options to buy 13×21.5×1 air filters. First, you can take a subscription service and get filters delivered every month. Second, you can place an order in bulk by choosing packs of 4, 6, 12, or more, and get a huge discount. For the filters to be most effective, however, you must change them every 3-6 months.