21 1/2 x 21 1/2 x 1

Basic 21 1/2 x 21 1/2 x 1 MERV 6 / MPR 300 / FPR N/A
21 1/2 x 21 1/2 x 1 MERV 6 Fiberglass Air Filter
Click to view more details
  • Nominal Size: 21 1/2 x 21 1/2 x 1
    Actual size: 21 1/2" x 21 1/2" x 3/4"
    Performance: Basic
    Type: Fiberglass Air Filter
    Rating: MERV 6 | MPR 300 | FPR N/A
    Captured Particle Size: 3-100 Microns
    Change Frequency: Every 30 Days
    SKU#: D50S.0121H21H
    Lead Time: Ships in 3 Business Days
    Additional Info: View product page


  • Price (6 pack):
    $52.02 ($8.67 each)
  • SAVE 10% buying 12 or more
    Price (12 pack):

    $93.60 ($7.80 each)
  • Subscribe to this product: Subscribe
Dust & Pollen 21 1/2 x 21 1/2 x 1 MERV 8 / MPR 600 / FPR 5
21 1/2 x 21 1/2 x 1 MERV 8 Pleated Air Filter
Click to view more details
  • Nominal Size: 21 1/2 x 21 1/2 x 1
    Actual size: 21 1/2" x 21 1/2" x 3/4"
    Performance: Dust & Pollen
    Type: Pleated Air Filter
    Rating: MERV 8 | MPR 600 | FPR 5
    Captured Particle Size: 3-10 Microns
    Change Frequency: Every 60-90 Days
    SKU#: P80S.0121H21H
    Lead Time: Ships in 3 Business Days
    Additional Info: View product page


  • Price (6 pack):
    $56.82 ($9.47 each)
  • SAVE 10% buying 12 or more
    Price (12 pack):

    $102.24 ($8.52 each)
  • Subscribe to this product: Subscribe
Micro Allergen 21 1/2 x 21 1/2 x 1 MERV 11 / MPR 1000-1200 / FPR 7
21 1/2 x 23 5/16 x 1 MERV 11 Pleated Air Filter
Click to view more details
  • Nominal Size: 21 1/2 x 21 1/2 x 1
    Actual size: 21 1/2" x 21 1/2" x 3/4"
    Performance: Micro Allergen
    Type: Pleated Air Filter
    Rating: MERV 11 | MPR 1000-1200 | FPR 7
    Captured Particle Size: 1-3 Microns
    Change Frequency: Every 60-90 Days
    SKU#: P15S.0121H21H
    Lead Time: Ships in 3 Business Days
    Additional Info: View product page


  • Price (6 pack):
    $65.64 ($10.94 each)
  • SAVE 10% buying 12 or more
    Price (12 pack):

    $118.20 ($9.85 each)
  • Subscribe to this product: Subscribe
Ultimate Allergen 21 1/2 x 21 1/2 x 1 MERV 13 / MPR 1500-1900 / FPR 10
21 1/2 x 21 1/2 x 1 MERV 13 Pleated Air Filter
Click to view more details
  • Nominal Size: 21 1/2 x 21 1/2 x 1
    Actual size: 21 1/2" x 21 1/2" x 3/4"
    Performance: Ultimate Allergen
    Type: Pleated Air Filter
    Rating: MERV 13 | MPR 1500-1900 | FPR 10
    Captured Particle Size: 0.3-1.0 Microns
    Change Frequency: Every 60-90 Days
    SKU#: P25S.0121H21H
    Lead Time: Ships in 3 Business Days
    Additional Info: View product page


  • Price (6 pack):
    $80.82 ($13.47 each)
  • SAVE 10% buying 12 or more
    Price (12 pack):

    $145.44 ($12.12 each)
  • Subscribe to this product: Subscribe
PRODUCT
Details
MERV 6
MPR 300
FPR N/A
MERV 8
MPR 600
FPR 5
MERV 11
MPR 1000-1200
FPR 7
MERV 13
MPR 1500-1900
FPR 10

21 1/2 x 21 1/2 x 1Air Filter

21 1/2" x 21 1/2" x 3/4" 21 1/2" x 21 1/2" x 3/4" 21 1/2" x 21 1/2" x 3/4" 21 1/2" x 21 1/2" x 3/4"
SAVE 10%
buying a
12 Pack
or more
$93.60
$7.80 each
$102.24
$8.52 each
$118.20
$9.85 each
$145.44
$12.12 each
6 Pack Pricing
$52.02
$8.67 each
$56.82
$9.47 each
$65.64
$10.94 each
$80.82
$13.47 each
Change Frequency
Every 30 Days Every 60-90 Days Every 60-90 Days Every 60-90 Days
Lint
Dust Mites
Mold Spores
Pollen
Pet Dander
Fine Dust
Auto Emissions
Very Fine Dust
Smoke
Bacteria

Back to top