18x20x1 Air Filters

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Products   MERV Rating Filter Life Annual Cost Value Pack
MERV 8 18x20x1 SpiroPure O
MERV 8 18x20x1 Filters (Nominal Size)
  • $39.99
  • 6 Filters
  • ($6.67/filter)
MERV 8
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3 Months $26.66/yr
Best Value!

$39.99
6 Filters

($6.67/filter)
18x20x1 MERV8 SpiroPure O
MERV 8 18x20x1 Filters (Actual Size)
  • $65.99
  • 6 Filters
  • ($11.00/filter)
MERV 8
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3 Months $43.99/yr

$65.99
6 Filters

($11.00/filter)
18x20x1 MERV8 SpiroPure O
MERV 8 18x20x1 Filters (Nominal Size)
  • $79.99
  • 12 Filters
  • ($6.67/filter)
MERV 8
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3 Months $26.66/yr

$79.99
12 Filters

($6.67/filter)
MERV 11 18x20x1 SpiroPure O
MERV 11 18x20x1 Filters (Nominal Size)
    5 stars
  • $41.99
  • 6 Filters
  • ($7.00/filter)
MERV 11
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3 Months $27.99/yr

$41.99
6 Filters

($7.00/filter)
18x20x1 MERV11 SpiroPure O
MERV 11 18x20x1 Filters (Actual Size)
  • $76.99
  • 6 Filters
  • ($12.83/filter)
MERV 11
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3 Months $51.33/yr

$76.99
6 Filters

($12.83/filter)
18x20x1 MERV11 SpiroPure O
MERV 11 18x20x1 Filters (Nominal Size)
  • $82.99
  • 12 Filters
  • ($6.92/filter)
MERV 11
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3 Months $27.66/yr

$82.99
12 Filters

($6.92/filter)
MERV 13 18x20x1 SpiroPure O
MERV 13 18x20x1 Filters (Nominal Size)
  • $44.99
  • 6 Filters
  • ($7.50/filter)
MERV 13
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3 Months $29.99/yr

$44.99
6 Filters

($7.50/filter)
18x20x1 MERV13 SpiroPure O
MERV 13 18x20x1 Filters (Nominal Size)
    5 stars
  • $88.99
  • 12 Filters
  • ($7.42/filter)
MERV 13
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3 Months $29.66/yr

$88.99
12 Filters

($7.42/filter)
18x20x1 MERV13 SpiroPure O
MERV 13 18x20x1 Filters (Actual Size)
  • $91.99
  • 6 Filters
  • ($15.33/filter)
MERV 13
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3 Months $61.33/yr

$91.99
6 Filters

($15.33/filter)
18x20x1 OdorBan SpiroPure F
Odor Eliminator 18x20x1 Filters (Actual Size)
  • $72.99
  • 6 Filters
  • ($12.17/filter)
MERV 8
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3 Months Learn more
about odor eliminator filters
$48.66/yr

$72.99
6 Filters

($12.17/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.