Universal-4-Pack
Protects all against
MERV-13

19x21x1

19x21x1
AC Furnace Air Filter
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Product Description

Filter Size: 19x21x1

Actual Size: 18.5×20.5×1

Actual Size Fraction : 18-1/2×20-1/2×1

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19x21x1 Air Filters

Welcome to the world of exceptional air purification, brought to you by our meticulously engineered 19x21x1 Air Filters, exclusively available at Custom Filters Direct. Crafted with precision and innovation, these filters are designed to surpass ordinary standards, providing you with an unparalleled air quality experience within the comfort of your home.

Product Features:

  • Nominal Size (19x21x1): Achieve a perfect fit for your HVAC system with the nominal size of 19x21x1, ensuring compatibility across a wide range of heating and cooling units.
  • Actual Size (18.5×20.5×1): Eliminate guesswork during installation with the actual size of 18.5×20.5×1, guaranteeing a snug fit that optimizes the filter’s performance.
  • Supercharged Pleated Panel: Immerse yourself in advanced air purification with our supercharged pleated panel filtering media. Specifically engineered to capture fine airborne allergens, such as dust, smoke, dander, mold, pet dander, and dust mites, these filters attract particulates with the efficiency of dust clinging to a TV screen.
  • 30-Times More Efficient: Experience superior filtration efficiency with our filters, which are up to 30 times more effective at capturing allergens compared to ordinary fiberglass filters. Enjoy a healthier living environment with every breath.
  • Uniform Pleat Shape: Enhance your air circulation without compromising on filtration effectiveness. The uniform pleat shape not only maximizes air flow but also boosts dust holding capacity, ensuring optimal performance over an extended period.
  • Proudly Made in the USA: Trust in the quality of American craftsmanship. Our air filters are proudly made in the USA, adhering to rigorous standards and ensuring superior performance.


Take command of your indoor air quality and transform your living space with the 19x21x1 Air Filters from Custom Filters Direct. Order online today, and immerse yourself in the elevated experience of air purification that only top-notch filters can provide!