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AC Furnace Air Filter
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Product Description

Filter Size: 18x18x1

Actual Size: 17.75×17.75×1

Actual Size Fraction : 17-3/4×17-3/4×1

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18x18x1 Air Filters

Breathe easier and create a healthier indoor environment with our top-of-the-line 18x18x1 air filters. At Custom Filters Direct, we go above and beyond to provide you with superior air filtration solutions designed to combat a wide range of airborne contaminants. Our 18x18x1 filters are crafted with precision, ensuring optimal protection and unmatched performance for your residential or commercial space.

Key Features and Specifications:

  • Filter Size: 18x18x1
  • Actual Size: 17.5 x 17.5 x .75
  • Thickness: 1-Inch
  • Protection Against: Bacteria, Smoke, Viruses, Mold Spores, Dust Mites, Household Dust, Pollen, and Pet Dander
  • Ideal for Residential and Commercial Use


Enhanced Efficiency:

Experience filtration efficiency like never before. Our 18x18x1 pleated air filters outperform fiberglass alternatives by at least 20 times. Made in the USA, these filters set a new standard for air quality by effectively capturing and eliminating airborne particles.

Durable Construction:

Built to withstand the demands of diverse environments, our filters feature frames made from heat-resistant paperboard with horizontal grid supports. Capable of handling temperatures up to 200°F and resistant to moisture, these frames surpass traditional cardboard frames. Additionally, their resistance to microbial growth ensures lasting performance.

Advanced Filtration Media:

The heart of our 18x18x1 air filters lies in their chemical-free, electrostatically charged synthetic polyester media. The pleated design maximizes surface area, effectively capturing particles as small as 0.3 microns while maintaining low airflow resistance. Supported by a corrosion-resistant steel wire, this media guarantees durability.

Benefits You Can Trust:

  • Unmatched Filtration: Protect your living or working space from pollen, dust, mold spores, bacteria, and more.
  • Temperature Resistant: Withstand temperatures of up to 200°F, ensuring consistent performance in various environments.
  • Moisture Resistance: Resistant to moisture, our filters maintain their integrity, preventing microbial growth.
  • Superior Construction: Heat-resistant paperboard frames provide durability and structural stability.
  • Made in the USA: We take pride in delivering filters that are proudly made in the United States.


Transform Your Indoor Environment – Order 18x18x1 Air Filters from Custom Filters Direct Today!

Take control of your indoor air quality and upgrade your air filtration system with confidence. Order our 18x18x1 air filters online from Custom Filters Direct and embark on a journey towards a healthier, cleaner living or working space. Elevate your air quality – choose Custom Filters Direct!