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16x21x1 – Merv 13

16x21x1 – Merv 13
AC Furnace Air Filter
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Product Description

Filter Size: 16x21x1

Actual Size: 15.5×20.5×1

Actual Size Fraction : 15-1/2×20-1/2×1

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Order 16x21x1 Air Filters Online

Custom Filters Direct 16x21x1 air filters are a great choice for improving your indoor air quality compared to basic ordinary filters. They’re made from charged synthetic media which can help you to remove the majority of smaller particles, such as spores and mites that cause allergies and other breathing problems.

All our AC and furnace filters are 100% made in the USA and offer superior air filtration. Custom Filters Direct 16x21x1 air filters are an ideal upgrade from the cheap air filters available on the market. Our furnace and HVAC filters fit almost every residential, commercial, and industrial environment and capture more than 90% of the airborne particles.

Custom Filters Direct 16x21x1 filters provide exceptional air filtration and capture almost all of the small air particles passing through them. Our air filters also improve the efficiency of your HVAC unit and help you save on energy bills. We recommend you to check the air filters regularly and change the filters every 60-90 days to maintain healthy indoor air quality.

Choose the Right MERV Rating


MERV 8 air filters capture 85% of the airborne particles 3.0-10.0 microns in size, including dust mite, dust and lint, mold spores, debris, pollen, and virus carriers


These filters capture more than 85% of airborne particles 3.0-10.0 microns in size and 50% of airborne particles 1.0-3.0 microns in size. MERV 11 filters eliminate dust mite, lint, pet dander, mold spores, debris, pollen, bacteria, virus carriers as well as most smoke and smog.


These filters capture more than 90% of airborne particles including pet dander, mold spores, debris, dust, lint, pollen, bacteria, virus carriers, most smoke, smog, oil smoke as well as lead dust.

16x21x1 Air Filters Delivery

Custom Filters Direct makes it easy and convenient to buy 16x21x1 HVAC and furnace filters online. We offer 2 different shopping options for your convenience. We offer auto-delivery for air filters to help you save time. This subscription model allows you to choose an air filter delivery interval that suits your needs. We also offer a one-time delivery option. All our 16x21x1 air filters are delivered in packs of 4, 6, 12, and more. We offer huge discounts on bulk orders. Choose the right option that fits your needs and place your order now!