21x45x1 Air Filters

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Products   MERV Rating Filter Life Annual Cost Value Pack
21x45x1 MERV8 SpiroPure O
MERV 8 Pleated Filters (6 Pack)
  • $173.66
  • 6 Filters
  • ($28.94 / filters)
MERV 8
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3 Months $115.77
Best Value!

$173.66
6 Filters

($28.94 / filter)
21x45x1 MERV11 SpiroPure O
MERV 11 Pleated Filters (6 Pack)
    5 stars
  • $186.43
  • 6 Filters
  • ($31.07 / filters)
MERV 11
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3 Months $124.29

$186.43
6 Filters

($31.07 / filter)
21x45x1 MERV13 SpiroPure O
MERV 13 Pleated Filters (6 Pack)
    5 stars
  • $216.86
  • 6 Filters
  • ($36.14 / filters)
MERV 13
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3 Months $144.57

$216.86
6 Filters

($36.14 / filter)
21x45x1 OdorBan SpiroPure F
MERV 10 Odor Eliminator Filters (6 Pack)
  • $251.70
  • 6 Filters
  • ($41.95 / filters)
MERV 10
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3 Months Learn more
about odor eliminator filters
$167.80

$251.70
6 Filters

($41.95 / filter)
MERV Rating - Contaminant Removal Guide
MERV Rating   8 11 12 13
Lint & Dust  
Dust Mite Debris  
Pollen  
Mold Spores  
Pet Dander  
Auto Emissions  
Smoke  
Tobacco  
Bacteria  
Note: equals efficient removal of contaminant by filter.