• Get FREE shipping on orders over $99

21x24.5x4.5 Rheem / Ruud Air Filters

Sort by:
Products   MERV Rating Filter Life Annual Cost Value Pack
21x24.5x4.5 Rheem Ruud MERV8 SpiroPure F
Rheem / Ruud Compatible (MERV 8)
  • $53.99
  • 2 Filters
  • ($27.00/filter)
MERV 8
Learn more
6 Months $53.99/yr
Best Value!

$53.99
2 Filters

($27.00/filter)
21x24.5x4.5 Rheem Ruud MERV11 SpiroPure F
Rheem / Ruud Compatible (MERV 11)
  • $66.99
  • 2 Filters
  • ($33.50/filter)
MERV 11
Learn more
6 Months $66.99/yr

$66.99
2 Filters

($33.50/filter)
21x24.5x4.5 Rheem Ruud MERV13 SpiroPure F
Rheem / Ruud Compatible (MERV 13)
  • $78.99
  • 2 Filters
  • ($39.50/filter)
MERV 13
Learn more
6 Months $78.99/yr

$78.99
2 Filters

($39.50/filter)
21x24.5x4.5 Rheem Ruud OdorBan SpiroPure F
Rheem / Ruud Compatible (OdorBan)
  • $100.99
  • 2 Filters
  • ($50.50/filter)
MERV 8
Learn more
6 Months Learn more
about odor eliminator filters
$100.99/yr

$100.99
2 Filters

($50.50/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.