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AC Furnace Air Filter
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Product Description

Filter Size: 17x25x4A

Actual Size: 17x25x4

Actual Size Fraction : 17x25x4

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17x25x4A Air Filters

Improve the air you breathe in your home or commercial space with the superior performance of our 17x25x4A Air Filters, available for easy online purchase exclusively from Custom Filters Direct. Engineered for efficiency and crafted with precision, these filters promise to enhance your indoor air quality, providing a cleaner and healthier living or working environment.

Key Features:

  • Advanced Filtration Performance: Our 17x25x4A Air Filters go beyond basic filtration, offering advanced protection against a wide range of airborne particles. From dust and pollen to bacteria, mold, pet dander, smoke, viruses, and dust mites, these filters act as a reliable shield, ensuring the air you breathe is pure and contaminant-free.
  • 4-Inch Filter Design: With a 4-inch filter design, these filters provide an expanded surface area for improved particle capture. Enjoy extended usage and consistent performance over time, ensuring your indoor air remains fresh and clean.
  • Universal Residential/Commercial Use: Versatility is key, and our filters are designed to meet the diverse air filtration needs of both residential and commercial spaces. Whether at home or in the workplace, these filters deliver optimal air quality for a healthier and more comfortable environment.
  • Made in the USA: We take pride in the fact that all our air filters are meticulously manufactured in the United States. This commitment to quality ensures you receive a product that not only meets but exceeds industry standards, providing peace of mind for your air filtration needs.
  • Heat-Resistant Paperboard Frames: The filters feature frames made from heat-resistant paperboard, incorporating horizontal grid supports. Resilient to temperatures up to 200°F and resistant to moisture, these frames outperform traditional cardboard frames by inhibiting microbial growth and maintaining structural integrity.
  • Electrostatically Charged Synthetic Polyester Media: Our chemical-free filters leverage electrostatically charged synthetic polyester media for efficient particle capture. Pleated to maximize surface area, these filters effectively trap airborne particles as small as 0.3 microns, all while maintaining low airflow resistance.
  • Corrosion-Resistant Steel Wire Support: Ensuring durability, the media is supported with a corrosion-resistant steel wire. This robust construction guarantees a long-lasting and effective air filtration solution for your HVAC system, contributing to a healthier indoor environment.


Upgrade your indoor air quality today by adding the 17x25x4A Air Filters from Custom Filters Direct to your cart. Breathe in the freshness and experience the transformative benefits of superior air quality in your living or working space.