20x28x2 Geothermal Air Filters

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Products   MERV Rating Filter Life Annual Cost Value Pack
20x28x2 MERV8 SpiroPure O
MERV 8 Geothermal Filters (6 Pack)
  • $115.98
  • 6 Filters
  • ($19.33 / filters)
MERV 8
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3 Months $77.32
Best Value!

$115.98
6 Filters

($19.33 / filter)
20x28x2 MERV11 SpiroPure O
MERV 11 Geothermal Filters (6 Pack)
    5 stars
  • $141.93
  • 6 Filters
  • ($23.66 / filters)
MERV 11
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3 Months $94.62

$141.93
6 Filters

($23.66 / filter)
20x28x2 MERV13 SpiroPure O
MERV 13 Geothermal Filters (6 Pack)
    3.5 stars
  • $175.21
  • 6 Filters
  • ($29.20 / filters)
MERV 13
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3 Months $116.81

$175.21
6 Filters

($29.20 / 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.