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Universal-4-Pack
Protects all against
MERV-13

21.5x26x1

21.5x26x1
AC Furnace Air Filter
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Product Description

Filter Size: 21.5x26x1A

Actual Size: 21.5x26x1

Actual Size Fraction : 21-1/2x26x1

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21.5x26x1 Air Filters

Elevate your indoor air quality with the cutting-edge features of our 21.5x26x1 Air Filters, available for convenient online purchase from Custom Filters Direct. Engineered for superior performance, these filters go beyond basic filtration, bringing added convenience, durability, and advanced technology to your air purification needs.

Key Features:

  • Optimal Dimensions: The precisely measured size of 21.5x26x1 ensures a perfect fit into your HVAC system, maximizing the coverage area for efficient and comprehensive air filtration. Experience an upgrade in air quality throughout your living or working space.
  • Effective Filtration Technology: Harnessing advanced filtration technology, these filters are designed to capture a wide range of airborne particles. From common irritants like dust, pollen, and pet dander to more microscopic threats such as mold, these filters deliver cleaner and fresher air with each breath.
  • Low Air Flow Resistance: Engineered to maintain low air flow resistance, these filters provide efficient filtration without compromising the performance of your HVAC system. Enjoy a balanced and steady airflow, ensuring optimal ventilation throughout your indoor environment.
  • Durability and Longevity: Crafted with high-quality materials, these air filters are built to last. The robust construction ensures structural integrity, providing longevity that reduces the frequency of replacements. This durability adds convenience to your air filtration routine.
  • Trusted Craftsmanship: Rest easy knowing that these air filters are crafted with precision and care. Custom Filters Direct is committed to delivering reliable and effective filtration solutions, ensuring your satisfaction with every use. Trust in the quality craftsmanship that goes into each filter.
  • Versatile Application: Suitable for both residential and commercial spaces, these filters adapt effortlessly to various indoor environments. Enhance the air quality in your home or workplace with the versatility of these meticulously engineered filters, tailored to meet diverse indoor air needs.


Simplify your air quality upgrade with the ease of online shopping. Custom Filters Direct’s user-friendly platform allows you to effortlessly purchase your 21.5x26x1 Air Filters and have them delivered directly to your doorstep. Enjoy the convenience of upgrading your air filtration system from the comfort of your home.

Upgrade your air filtration system effortlessly – choose our 21.5x26x1 Air Filters from Custom Filters Direct. Immerse yourself in a cleaner and healthier indoor environment, and breathe with confidence, knowing you have invested in a superior filtration solution with advanced features designed to meet and exceed your expectations.