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AC Furnace Air Filter
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Product Description

Filter Size: 20x23x4

Actual Size: 19.5×22.5×4

Actual Size Fraction : 19-1/2×22-1/2×4

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20x23x4 Air Filters

Experience a new level of indoor air quality with our superior 20x23x4 Air Filters, available exclusively at Custom Filters Direct. These filters, designed for optimal performance, provide a reliable solution to breathing cleaner and fresher air in both residential and commercial settings.

Key Features:

  • Filter Size (20x23x4): Ensure a perfect fit for your HVAC system with the precisely sized 20x23x4 filters. This guarantees optimal filtration, contributing significantly to improved indoor air quality.
  • Actual Size: The actual size of 19.5 x 22.5 x 3.75 ensures compatibility and optimal performance, making these filters an ideal replacement for your current system.
  • 4-Inch Filter: With a substantial 4-inch profile, these filters offer enhanced filtration capacity. Effectively capturing a broad spectrum of airborne particles contributes to creating a healthier living or working space.
  • Comprehensive Protection: Safeguard your indoor environment against various contaminants, including pollen, dust, mold, dust mites, bacteria, pet dander, smoke, and viruses. These filters provide versatile protection for both residential and commercial applications.


Additional Benefits:

  • High Effectiveness: Our 20x23x4 pleated air filters are at least 20 times more effective than fiberglass filters. Enjoy superior filtration performance for a cleaner and healthier atmosphere.
  • Quality Construction: The filter frames, made from heat-resistant paperboard with horizontal grid supports, ensure durability. Capable of withstanding temperatures of up to 200°F and resistance to moisture, these frames outperform traditional cardboard frames. They also do not support microbial growth, providing reliability and longevity.
  • Advanced Filtration Media: Our filters feature chemical-free, electrostatically charged synthetic polyester media that is pleated to maximize surface area. This technology efficiently captures a high number of airborne particles as small as 0.3 microns with low air flow resistance. For increased durability, the media is supported with a corrosion-resistant steel wire.


Elevate your indoor air quality effortlessly with the 20x23x4 Air Filters from Custom Filters Direct. Order online today and take the first step towards breathing cleaner and fresher air. Experience the transformative difference that advanced air filtration can make in your environment!