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28x30x2 Geothermal Air Filters

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Products   MERV Rating Filter Life Annual Cost Value Pack
28x30x2 MERV8 SpiroPure O
MERV 8 Geothermal Filters (6 Pack)
  • $94.99
  • 6 Filters
  • ($15.83/filter)
MERV 8
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3 Months $63.33/yr
Best Value!

$94.99
6 Filters

($15.83/filter)
MERV 11 28x30x2 SpiroPure O
MERV 11 Geothermal Filters (6 Pack)
  • $105.99
  • 6 Filters
  • ($17.67/filter)
MERV 11
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3 Months $70.66/yr

$105.99
6 Filters

($17.67/filter)
28x30x2 MERV13 SpiroPure O
MERV 13 Geothermal Filters (6 Pack)
  • $121.99
  • 6 Filters
  • ($20.33/filter)
MERV 13
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3 Months $81.33/yr

$121.99
6 Filters

($20.33/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.