21.5x23.5x1 Air Filters

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Products   MERV Rating Filter Life Annual Cost Value Pack
MERV 8 21.5x23.5x1 SpiroPure O
MERV 8 Pleated Filters (6 Pack)
  • $77.99
  • 6 Filters
  • ($13.00/filter)
MERV 8
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3 Months $51.99/yr

$77.99
6 Filters

($13.00/filter)
MERV 11 21.5x23.5x1 SpiroPure O
MERV 11 Pleated Filters (6 Pack)
  • $90.99
  • 6 Filters
  • ($15.17/filter)
MERV 11
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3 Months $60.66/yr

$90.99
6 Filters

($15.17/filter)
MERV 13 21.5x23.5x1 SpiroPure F
MERV 13 Pleated Filters (6 Pack)
  • $82.99
  • 6 Filters
  • ($13.83/filter)
MERV 13
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3 Months $55.33/yr

$82.99
6 Filters

($13.83/filter)
21.5x23.5x1 Carbon SpiroPure F
MERV 8 Odor Eliminator Filters (6 Pack)
  • $71.99
  • 6 Filters
  • ($12.00/filter)
MERV 8
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3 Months Learn more
about odor eliminator filters
$47.99/yr
Best Value!

$71.99
6 Filters

($12.00/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.