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AC Furnace Air Filter
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Product Description

Filter Size: 18x36x1A

Actual Size: 18x36x1

Actual Size Fraction : 18x36x1

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18x36x1A Air Filters

Welcome to Custom Filters Direct, where excellence meets air filtration. Uncover the superior features of our 18x36x1A Air Filters, available for easy online purchase, and take control of your indoor air quality. Here’s a detailed exploration of what sets our filters apart:

Product Features:

  • Actual Size (18x36x1): Engineered with precision, these air filters boast an actual size of 18x36x1, ensuring a tailored fit for your HVAC system. This meticulous sizing ensures optimal performance in enhancing your indoor air quality.
  • 1-Inch Filter Thickness: Striking the right balance between efficient filtration and optimal airflow, our 1-inch thick filters provide the perfect solution for effective air purification without compromising on ventilation.
  • Effective Protection: Offering comprehensive protection against pollen, dust, mold, dust mites, bacteria, pet dander, smoke, and viruses, our filters are designed to cater to the diverse needs of both residential and commercial environments.
  • Superior Efficiency: Elevating the standard of air filtration, our 18x36x1A pleated air filters outshine fiberglass counterparts by being at least 20 times more effective. Experience filtration excellence that goes beyond industry norms.
  • Proudly Made in the USA: We take pride in the origin of our air filters. Manufactured with precision in the USA, our filters represent a commitment to quality craftsmanship and adhere to the strictest manufacturing standards.
  • Durable Frame Construction: The frames of our filters are crafted from heat-resistant paperboard with horizontal grid supports. Able to withstand temperatures of up to 200°F and resistant to moisture, these frames not only provide durability but also inhibit microbial growth, outperforming traditional cardboard frames.
  • Chemical-Free Media: Our air filters feature chemical-free, electrostatically charged synthetic polyester media. The pleated design maximizes the surface area, capturing a high number of airborne particles as small as 0.3 microns while maintaining low airflow resistance.
  • Corrosion-Resistant Support: Enhancing the longevity of our filters, the media is supported with a corrosion-resistant steel wire, ensuring consistent and reliable performance over an extended period.


Elevate your indoor air quality confidently with Custom Filters Direct. Purchase our 18x36x1A Air Filters online today, and experience the assurance of cleaner, healthier air. Make a proactive choice for a fresher living or working environment – place your order now!