21x47x2 Air Filters

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Products   MERV Rating Filter Life Annual Cost Value Pack
21x47x2 MERV8 SpiroPure O
MERV 8 Pleated Filters (6 Pack)
  • $233.19
  • 6 Filters
  • ($38.87 / filters)
MERV 8
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3 Months $155.46
Best Value!

$233.19
6 Filters

($38.87 / filter)
21x47x2 MERV11 SpiroPure O
MERV 11 Pleated Filters (6 Pack)
  • $251.73
  • 6 Filters
  • ($41.96 / filters)
MERV 11
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3 Months $167.82

$251.73
6 Filters

($41.96 / filter)
21x47x2 MERV13 SpiroPure O
MERV 13 Pleated Filters (6 Pack)
  • $274.25
  • 6 Filters
  • ($45.71 / filters)
MERV 13
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3 Months $182.83

$274.25
6 Filters

($45.71 / 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.