• Get FREE shipping on orders over $99

17.5x21.5x1 Air Filters

Sort by:
Products   MERV Rating Filter Life Annual Cost Value Pack
MERV8 17.5x21.5x1 SpiroPure O
MERV 8 Pleated Filters (6 Pack)
  • $65.99
  • 6 Filters
  • ($11.00/filter)
MERV 8
Learn more
3 Months $43.99/yr

$65.99
6 Filters

($11.00/filter)
17.5x21.5x1 MERV8 SpiroPure O
MERV 8 Pleated Filters (12 Pack)
  • $127.99
  • 12 Filters
  • ($10.67/filter)
MERV 8
Learn more
3 Months $42.66/yr
Best Value!

$127.99
12 Filters

($10.67/filter)
MERV11 17.5x21.5x1 SpiroPure O
MERV 11 Pleated Filters (6 Pack)
  • $76.99
  • 6 Filters
  • ($12.83/filter)
MERV 11
Learn more
3 Months $51.33/yr

$76.99
6 Filters

($12.83/filter)
17.5x21.5x1 MERV11 SpiroPure O
MERV 11 Pleated Filters (12 Pack)
  • $147.99
  • 12 Filters
  • ($12.33/filter)
MERV 11
Learn more
3 Months $49.33/yr

$147.99
12 Filters

($12.33/filter)
MERV13 17.5x21.5x1 SpiroPure F
MERV 13 Pleated Filters (6 Pack)
  • $81.99
  • 6 Filters
  • ($13.67/filter)
MERV 13
Learn more
3 Months $54.66/yr

$81.99
6 Filters

($13.67/filter)
17.5x21.5x1 MERV13 SpiroPure F
MERV 13 Pleated Filters (12 Pack)
  • $150.99
  • 12 Filters
  • ($12.58/filter)
MERV 13
Learn more
3 Months $50.33/yr

$150.99
12 Filters

($12.58/filter)
17.5x21.5x1 OdorBan SpiroPure F
MERV 8 Odor Eliminator Filters (6 Pack)
  • $69.99
  • 6 Filters
  • ($11.67/filter)
MERV 8
Learn more
3 Months Learn more
about odor eliminator filters
$46.66/yr

$69.99
6 Filters

($11.67/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.