21x25x1 Air Filters

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Products   MERV Rating Filter Life Annual Cost Value Pack
21x25x1 MERV8 SpiroPure O
MERV 8 Pleated Filters (6 Pack)
    5 stars
  • $73.99
  • 6 Filters
  • ($12.33/filter)
MERV 8
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3 Months $49.33/yr
Best Value!

$73.99
6 Filters

($12.33/filter)
21x25x1 MERV11 SpiroPure O
MERV 11 Pleated Filters (6 Pack)
  • $87.99
  • 6 Filters
  • ($14.67/filter)
MERV 11
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3 Months $58.66/yr

$87.99
6 Filters

($14.67/filter)
21x25x1 MERV13 SpiroPure O
MERV 13 Pleated Filters (6 Pack)
  • $100.99
  • 6 Filters
  • ($16.83/filter)
MERV 13
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3 Months $67.33/yr

$100.99
6 Filters

($16.83/filter)
21x25x1 OdorBan SpiroPure F
MERV 8 Odor Eliminator Filters (6 Pack)
  • $116.99
  • 6 Filters
  • ($19.50/filter)
MERV 8
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3 Months Learn more
about odor eliminator filters
$77.99/yr

$116.99
6 Filters

($19.50/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.