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 (Nominal Size)
    5 stars
  • $100.99
  • 6 Filters
  • ($16.83 / filters)
MERV 8
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3 Months $67.33
Best Value!

$100.99
6 Filters

($16.83 / filter)
MERV 11 28x30x2 SpiroPure O
MERV 11 Geothermal Filters (Nominal Size)
    5 stars
  • $119.99
  • 6 Filters
  • ($20.00 / filters)
MERV 11
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3 Months $79.99

$119.99
6 Filters

($20.00 / filter)
28x30x2 MERV13 SpiroPure O
MERV 13 Geothermal Filters (Nominal Size)
    5 stars
  • $136.99
  • 6 Filters
  • ($22.83 / filters)
MERV 13
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3 Months $91.33

$136.99
6 Filters

($22.83 / 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.