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AC Furnace Air Filter
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Product Description

Filter Size: 16x21x1

Actual Size: 15.5×20.5×1

Actual Size Fraction : 15-1/2×20-1/2×1

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16x21x1 Air Filters

Transform your living or working environment with the superior performance of our meticulously crafted 16x21x1 air filters. Carefully designed to cater to the specific needs of your HVAC system, these filters are now easily accessible for online purchase at Custom Filters Direct.

Key Features:

  • Perfect Fit – Actual Size Dimensions (16x21x1): Ensure optimal integration with your HVAC system, delivering a precise fit to enhance air quality in your residential or commercial spaces.
  • Long-Lasting Performance – 3-Month Filter Change Interval: Experience consistent, efficient air filtration over an extended period with a recommended change-out interval of 3 months.
  • Advanced Filter Media with Antimicrobial Properties: Our air filters feature 100% synthetic gradient media with antimicrobial properties, capturing a diverse range of particles. This ensures not only effective filtration but also promotes cleaner, healthier air for you and your loved ones.
  • Robust Support Grid for Optimal Performance: Equipped with a sturdy 30-gauge galvanized expanded metal support grid, these filters guarantee durability and optimal performance. They can withstand the rigors of continuous use, ensuring reliable filtration.
  • Moisture-Resistant Double-Wall Beverage Board Box Frame: The double-wall beverage board box frame is designed to resist moisture, contributing to prolonged filter life. This ensures consistent and reliable performance even in varying environmental conditions.
  • Temperature and Humidity Resilience: With an impressive maximum temperature resistance of 180F – 225F and 100% Relative Humidity (R.H.) resistance, these filters exhibit resilience in various environmental conditions. You can trust them to perform consistently, regardless of temperature and humidity fluctuations.
  • Available in Multiple MERV Ratings: Tailor your air filtration precisely to your needs with a range of available MERV ratings, including MERV 8, MERV 8 ODOR, MERV 11, and MERV 13. Choose the rating that aligns with your specific air quality requirements.


Elevate your indoor air quality effortlessly by ordering our 16x21x1 Air Filters online at Custom Filters Direct. Enjoy the benefits of consistently cleaner, fresher air in your home or office.