20x37x2 Geothermal Air Filters

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Products   MERV Rating Filter Life Annual Cost Value Pack
20x37x2 MERV8 SpiroPure O
MERV 8 Geothermal Filters (6 Pack)
    5 stars
  • $157.99
  • 6 Filters
  • ($26.33/filters)
MERV 8
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3 Months $105.33
Best Value!

$157.99
6 Filters

($26.33/filter)
20x37x2 MERV11 SpiroPure O
MERV 11 Geothermal Filters (6 Pack)
  • $186.99
  • 6 Filters
  • ($31.17/filters)
MERV 11
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3 Months $124.66

$186.99
6 Filters

($31.17/filter)
20x37x2 MERV13 SpiroPure O
MERV 13 Geothermal Filters (6 Pack)
    5 stars
  • $191.99
  • 6 Filters
  • ($32.00/filters)
MERV 13
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3 Months $127.99

$191.99
6 Filters

($32.00/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.