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Filterbuy 21x21x1 Air Filter MERV 11 (6-Pack) - Made in USA

Filterbuy ★ 4.3/5 · ItemOracle Score Mid-Range

$60 USD
Price subject to change
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Filterbuy 21x21x1 Air Filter MERV 11 Superior Pet & Allergy Defense (6-Pack), Electrostatic Pleated HVAC AC Furnace Filters Replacement, Made in USA (Actual Size: 20.88 x 20.88 x 0.75)

MERV 11 pleated air filters for furnaces, air conditioners, or heat pumps. Improves filtration of dust and allergens with 95% capture while maintaining airflow. One customer notes good quality and value for money

Highlights

  • MERV 11 synthetic media
  • Actual size close to 21x21 inches
  • 6-pack for multiple filters

Pros

  • MERV 11 filtration
  • Electrostatic pleated media
  • Universal compatibility
  • Made in USA
  • 6-pack convenience

Cons

  • Some customers report smaller size than advertised
  • Airflow performance varies by user

Best For

  • furnace air filtration
  • air conditioner filtration
  • heat pump filtration
  • allergen reduction in homes
  • pets-friendly air filtration
  • replacement filter for HVAC slots

Features

  • Universal 21x21x1 replacement filter for furnaces, A/C, or heat pumps
  • MERV 11 synthetic media captures allergens and pet dander with 95% dust capture
  • Electrostatically charged with 14 pleats per foot, longer-lasting filtration
  • Durable beverage board frames with dual wire backing for temperature resilience
  • Made in the USA with industrial-grade, recyclable materials

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