21.5x23.375x1 Air Filters

Sort by:
Products   MERV Rating Filter Life Annual Cost Value Pack
21.5x23.375x1 MERV8 SpiroPure O
MERV 8 Pleated Filters (6 Pack)
  • $77.99
  • 6 Filters
  • ($13.00/filter)
MERV 8
Learn more
3 Months $51.99/yr
Best Value!

$77.99
6 Filters

($13.00/filter)
21.5x23.375x1 MERV11 SpiroPure O
MERV 11 Pleated Filters (6 Pack)
  • $90.99
  • 6 Filters
  • ($15.17/filter)
MERV 11
Learn more
3 Months $60.66/yr

$90.99
6 Filters

($15.17/filter)
21.5x23.375x1 MERV13 SpiroPure F
MERV 13 Pleated Filters (6 Pack)
  • $102.99
  • 6 Filters
  • ($17.17/filter)
MERV 13
Learn more
3 Months $68.66/yr

$102.99
6 Filters

($17.17/filter)
21.5x23.375x1 OdorBan SpiroPure F
MERV 8 Odor Eliminator Filters (6 Pack)
  • $106.99
  • 6 Filters
  • ($17.83/filter)
MERV 8
Learn more
3 Months Learn more
about odor eliminator filters
$71.33/yr

$106.99
6 Filters

($17.83/filter)
MERV Rating - Contaminant Removal Guide
MERV Rating   8 11 12 13
Lint & Dust  
Dust Mile Debris  
Pollen  
Mold Spores  
Pet Dander  
Auto Emissions  
Smoke  
Tobacco  
Bacteria  
Note: equals efficient removal of contaminant by filter.