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Filterbuy 17.5x21x5 MERV 8 Pleated Air Filter (4-Pack)

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$137 USD
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Filterbuy 17.5x21x5 Air Filter MERV 8 Essential Dust & Allergy Defense (4-Pack), Electrostatic Pleated HVAC AC Furnace Filters for Rheem, Ruud, and Protech (Actual Size: 17.13 x 20.63 x 4.38)

Air filters for furnace/AC/heat pump with MERV 8 performance. Helps reduce pollen and dust; compatible with various systems. Customers note easy installation and good value, though fit and size concerns exist

Highlights

  • MERV 8 performance for filtration
  • actual size close to 17.13 x 20.63 x 4.38
  • suitable for multiple HVAC equipment

Pros

  • pleated electrostatic filtration
  • easy to install
  • reduces pollen and dust
  • value for money

Cons

  • mixed fit with some furnaces
  • size acknowledgment with slight variances
  • reports of damaged ends on some shipments

Best For

  • furnace filter replacement
  • air conditioning system maintenance
  • home air quality improvement
  • dust reduction in households
  • partial pollen defense
  • volatile allergen mitigation

Features

  • Filter size 17.13 in x 20.63 in x 4.38 in; actual size provided for compatibility
  • MERV 8 synthetic media captures dust, pollen, lint, mold while allowing airflow
  • Electrostatically charged media with 8 pleats per foot for extended life
  • Durable beverage board frame with dual wire backing for temperature resilience
  • Replacement interval recommended every 90 days; fits Rheem/Ruud filter models PD540010

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