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Filterbuy 21x21x1 Air Filter, MERV 13 (3-Pack)

Filterbuy ★ 4.0/5 · ItemOracle Score Mid-Range

$67 USD
Price subject to change
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Filterbuy 21x21x1 Air Filter MERV 13 Optimal Smoke & Allergy Defense (3-Pack), Electrostatic Pleated HVAC AC Furnace Filters Replacement, Made in USA (Actual Size: 20.88 x 20.88 x 0.75)

MERV 13 pleated air filters with universal 21x21x1 fit for furnaces, air conditioners, or heat pumps. Improves indoor air quality with synthetic media. Customers note easy installation and good value, though some report size inconsistencies

Highlights

  • MERV 13 synthetic media
  • universal 21x21x1 compatibility
  • 3-pack value

Pros

  • universal 21x21x1 compatibility
  • MERV 13 filtration
  • easy installation
  • value for money
  • made in USA

Cons

  • size inconsistencies reported by some customers
  • pleat spacing may be uneven per a customer review

Best For

  • replacement for furnace filters
  • air conditioner or heat pump filtration
  • enhanced indoor air quality in homes
  • allergy and asthma symptom reduction
  • residential and light commercial HVAC upkeep
  • standard HVAC maintenance

Features

  • Universal 21x21x1 replacement; compatible with furnace, air conditioner, or heat pump
  • MERV 13 filtration with synthetic media captures 98% of dust and germs while maintaining airflow
  • Electrostatically charged, 16 pleats per foot for longer-lasting filtration (approx. 3x fiberglass durability) and 90-day replacement recommendation
  • Durable beverage board frame with dual wire backing improves rigidity and resistance to temperature extremes
  • Made in the USA using industrial-grade, recyclable materials for dependable indoor air quality

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