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18x18x1 Air Filters

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Products   MERV Rating Filter Life Annual Cost Value Pack
MERV 8 18x18x1 SpiroPure O
MERV 8 Pleated Filters (6 Pack)
  • $37.99
  • 6 Filters
  • ($6.33/filter)
MERV 8
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3 Months $25.33/yr
Best Value!

$37.99
6 Filters

($6.33/filter)
18x18x1 MERV8 SpiroPure O
MERV 8 Pleated Filters (12 Pack)
  • $75.99
  • 12 Filters
  • ($6.33/filter)
MERV 8
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3 Months $25.33/yr

$75.99
12 Filters

($6.33/filter)
MERV 11 18x18x1 SpiroPure O
MERV 11 Pleated Filters (6 Pack)
  • $43.99
  • 6 Filters
  • ($7.33/filter)
MERV 11
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3 Months $29.33/yr

$43.99
6 Filters

($7.33/filter)
18x18x1 MERV11 SpiroPure O
MERV 11 Pleated Filters (12 Pack)
  • $86.99
  • 12 Filters
  • ($7.25/filter)
MERV 11
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3 Months $29.00/yr

$86.99
12 Filters

($7.25/filter)
MERV 13 18x18x1 SpiroPure O
MERV 13 Pleated Filters (6 Pack)
  • $60.99
  • 6 Filters
  • ($10.17/filter)
MERV 13
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3 Months $40.66/yr

$60.99
6 Filters

($10.17/filter)
18x18x1 MERV13 SpiroPure O
MERV 13 Pleated Filters (12 Pack)
  • $120.99
  • 12 Filters
  • ($10.08/filter)
MERV 13
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3 Months $40.33/yr

$120.99
12 Filters

($10.08/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.