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)
  • $112.99
  • 6 Filters
  • ($18.83/filter)
MERV 8
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3 Months $75.33/yr
Best Value!

$112.99
6 Filters

($18.83/filter)
21x45x1 MERV11 SpiroPure O
MERV 11 Pleated Filters (6 Pack)
  • $128.99
  • 6 Filters
  • ($21.50/filter)
MERV 11
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3 Months $85.99/yr

$128.99
6 Filters

($21.50/filter)
21x45x1 MERV13 SpiroPure F
MERV 13 Pleated Filters (6 Pack)
  • $132.99
  • 6 Filters
  • ($22.17/filter)
MERV 13
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3 Months $88.66/yr

$132.99
6 Filters

($22.17/filter)
21x45x1 OdorBan SpiroPure F
MERV 8 Odor Eliminator Filters (6 Pack)
  • $172.99
  • 6 Filters
  • ($28.83/filter)
MERV 8
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3 Months Learn more
about odor eliminator filters
$115.33/yr

$172.99
6 Filters

($28.83/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.