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Kirkland Signature Air Filters are the perfect tool for your home HVAC systems.  They lower energy consumption, protect the HVAC equipment better due to a lower in-use pressure drop, and hold more dust and particulates, lasting 90 days compared to the competitive air filtration products.
 Features:

Electrostatically Charged Fibers Attract and Capture Microscopic Airborne Particles
90 Day Air Flow Performance
Dual Airflow Technology.  Insert Filter in Either Direction
Captures:
Smoke / Pet Dander / Lint / Dust Mite Debris / Pollen / Smog / Particles that can Carry Viruses
Household Dust / Airborne Bacteria / Mold Spores / Particles that Carry Odors
Captures and Holds 30% More Dust and Particulates than other Elite Allergen Filters in the Market