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10 Best 20 x 21 1 2 xes of 2026

Save up to 10% off
  • Best Choice

    1

    Filter King 20x21x2 Air Filter (MERV 8) (4-Pack) Dust & Allergy Control AC Furnace Filters, MADE IN USA, HVAC, Pleated, Electrostatic (Actual Size: 20 x 21 x 1.75)
    Filter King

    Filter King 20x21x2 Air Filter (MERV 8) (4-Pack) Dust & Allergy Control AC Furnace Filters, MADE IN USA, HVAC, Pleated, Electrostatic (Actual Size: 20 x 21 x 1.75)

    9.8
    Exceptional
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  • Value for Money

    2

    Filterbuy 20x21x2 Air Filter MERV 11 Superior Pet & Allergy Defense (3-Pack), Electrostatic Pleated HVAC AC Furnace Filters Replacement (Actual Size: 20.00 x 21.00 x 1.75)
    Filterbuy

    Filterbuy 20x21x2 Air Filter MERV 11 Superior Pet & Allergy Defense (3-Pack), Electrostatic Pleated HVAC AC Furnace Filters Replacement (Actual Size: 20.00 x 21.00 x 1.75)

    9.7
    Exceptional

  • 3

    Filter King 20x21x1 Air Filter (MERV 8) (2-Pack) Dust & Allergy Control AC Furnace Filters, MADE IN USA, HVAC, Pleated, Electrostatic (Actual Size: 20 x 21 x .75)
    Filter King

    Filter King 20x21x1 Air Filter (MERV 8) (2-Pack) Dust & Allergy Control AC Furnace Filters, MADE IN USA, HVAC, Pleated, Electrostatic (Actual Size: 20 x 21 x .75)

    9.5
    Excellent

  • 4

    Filter King 20x21x1 Air Filter (MERV 8) (2-Pack) Dust & Allergy Control AC Furnace Filters, MADE IN USA, HVAC, Pleated, Electrostatic (Actual Size: 20 x 21 x .75)
    Filter King

    Filter King 20x21x1 Air Filter (MERV 8) (2-Pack) Dust & Allergy Control AC Furnace Filters, MADE IN USA, HVAC, Pleated, Electrostatic (Actual Size: 20 x 21 x .75)

    10% Off
    9.3
    Excellent

  • 5

    Filter King 20x21x2 Air Filter (MERV 8) (4-Pack) Dust & Allergy Control AC Furnace Filters, MADE IN USA, HVAC, Pleated, Electrostatic (Actual Size: 20 x 21 x 1.75)
    Filter King

    Filter King 20x21x2 Air Filter (MERV 8) (4-Pack) Dust & Allergy Control AC Furnace Filters, MADE IN USA, HVAC, Pleated, Electrostatic (Actual Size: 20 x 21 x 1.75)

    10% Off
    9.2
    Excellent
  • See Today’s Deals & Prices

  • 6

    Filterbuy 20x21x2 Air Filter MERV 8 Essential Dust & Allergy Defense (2-Pack), Electrostatic Pleated HVAC AC Furnace Filters Replacement (Actual Size: 20.00 x 21.00 x 1.75)
    Filterbuy

    Filterbuy 20x21x2 Air Filter MERV 8 Essential Dust & Allergy Defense (2-Pack), Electrostatic Pleated HVAC AC Furnace Filters Replacement (Actual Size: 20.00 x 21.00 x 1.75)

    9.1
    Excellent

  • 7

    Filterbuy 20x21x2 Air Filter MERV 8 Essential Dust & Allergy Defense (2-Pack), Electrostatic Pleated HVAC AC Furnace Filters Replacement (Actual Size: 20.00 x 21.00 x 1.75)
    Filterbuy

    Filterbuy 20x21x2 Air Filter MERV 8 Essential Dust & Allergy Defense (2-Pack), Electrostatic Pleated HVAC AC Furnace Filters Replacement (Actual Size: 20.00 x 21.00 x 1.75)

    10% Off
    9.0
    Excellent

  • 8

    Filterbuy 20x21x2 Air Filter MERV 11 Superior Pet & Allergy Defense (3-Pack), Electrostatic Pleated HVAC AC Furnace Filters Replacement (Actual Size: 20.00 x 21.00 x 1.75)
    Filterbuy

    Filterbuy 20x21x2 Air Filter MERV 11 Superior Pet & Allergy Defense (3-Pack), Electrostatic Pleated HVAC AC Furnace Filters Replacement (Actual Size: 20.00 x 21.00 x 1.75)

    10% Off
    8.9
    Very Good

  • 9

    Filtrete 20x21.5x1 AC Furnace Air Filter, MERV 8, MPR 700, Tough on Pollen, Easy on Airflow, 3-Month Pleated 1-Inch Electrostatic Air Cleaning Filter, 4-Pack (Actual Size 19.69 x 21.19 x 0.81 in)
    Filtrete

    Filtrete 20x21.5x1 AC Furnace Air Filter, MERV 8, MPR 700, Tough on Pollen, Easy on Airflow, 3-Month Pleated 1-Inch Electrostatic Air Cleaning Filter, 4-Pack (Actual Size 19.69 x 21.19 x 0.81 in)

    8.6
    Very Good

  • 10

    Filtrete 20x21.5x1 AC Furnace Air Filter, MERV 8, MPR 700, Tough on Pollen, Easy on Airflow, 3-Month Pleated 1-Inch Electrostatic Air Cleaning Filter, 4-Pack (Actual Size 19.69 x 21.19 x 0.81 in)
    Filtrete

    Filtrete 20x21.5x1 AC Furnace Air Filter, MERV 8, MPR 700, Tough on Pollen, Easy on Airflow, 3-Month Pleated 1-Inch Electrostatic Air Cleaning Filter, 4-Pack (Actual Size 19.69 x 21.19 x 0.81 in)

    8.3
    Good