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27.5x31.5x2 Geothermal Air Filters

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Products   MERV Rating Filter Life Annual Cost Value Pack
28x32x2 MERV SpiroPure O
MERV 8 Geothermal Filters (6 Pack)
  • $142.99
  • 6 Filters
  • ($23.83/filter)
MERV 8
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3 Months $95.33/yr
Best Value!

$142.99
6 Filters

($23.83/filter)
28x32x2 MERV11 SpiroPure O
MERV 11 Geothermal Filters (6 Pack)
  • $170.99
  • 6 Filters
  • ($28.50/filter)
MERV 11
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3 Months $113.99/yr

$170.99
6 Filters

($28.50/filter)
28x32x2 MERV13 SpiroPure O
MERV 13 Geothermal Filters (6 Pack)
  • $183.99
  • 6 Filters
  • ($30.67/filter)
MERV 13
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3 Months $122.66/yr

$183.99
6 Filters

($30.67/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.