• Get FREE shipping on orders over $99

18x24x4 Air Filters

Sort by:
Products   MERV Rating Filter Life Annual Cost Value Pack
MERV8 18x24x4 SpiroPure O
MERV 8 Pleated Filters (6 Pack)
  • $75.99
  • 6 Filters
  • ($12.67/filter)
MERV 8
Learn more
3 Months $50.66/yr
Best Value!

$75.99
6 Filters

($12.67/filter)
MERV11 18x24x4 SpiroPure O
MERV 11 Pleated Filters (6 Pack)
  • $99.99
  • 6 Filters
  • ($16.67/filter)
MERV 11
Learn more
3 Months $66.66/yr

$99.99
6 Filters

($16.67/filter)
MERV13 18x24x4 SpiroPure F
MERV 13 Pleated Filters (6 Pack)
  • $120.99
  • 6 Filters
  • ($20.17/filter)
MERV 13
Learn more
3 Months $80.66/yr

$120.99
6 Filters

($20.17/filter)
odor eliminator 18x24x4 SpiroPure F
MERV 8 Odor Eliminator Filters (6 Pack)
  • $134.99
  • 6 Filters
  • ($22.50/filter)
MERV 8
Learn more
3 Months Learn more
about odor eliminator filters
$89.99/yr

$134.99
6 Filters

($22.50/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.