100% Free U.S. Shipping
Get 5% off when you subscribe
Free shipping, free returns
Search

Ruud Compatible Air Filter Replacements

Filterbuy replacement air filters offer the same high quality materials and performance as the name brand but at a fraction of the cost.

  • Available in MERV 8, 11, and 13
  • Free shipping
  • Guaranteed to fit
  • Lowest prices
  • Made in the U.S.A.
  • Family owned and operated

Customer Review

"Absolutely the best and most efficient way to purchase furnace filters! No problem finding the filter I needed, filters delivered within a couple of days, fit perfectly and shipping is FREE! What's not to like?"-Christine P.
Thumb

17.5 X 21 X 4.5 MERV 8 17.5 X 21 X 4.5 MERV 11 17.5 X 21 X 4.5 MERV 13

Actual: 17.25x20.75x4.38"

Designed to Fit:
RXHF-E17AM10 RXHF-E17AM13

Select MERV Rating
MERV
8
Standard
MERV
11
Superior
MERV
13
Best

MERV 8 - filters pollen, dust mites, mold, and larger dust particles like pudding mix MERV 11 - filters pollen, dust mites, mold, auto emissions, and large particles like milled flour MERV 13 - filters pollen, dust mites, mold, all bacteria, proplet nuclei (sneeze), and tobacco smoke

ea
Thumb

21 X 21 X 4.5 MERV 8 21 X 21 X 4.5 MERV 11 21 X 21 X 4.5 MERV 13

Actual: 20.75x20.75x4.38"

Designed to Fit:
RXFH-E21AM10 RXFH-E21AM13

Select MERV Rating
MERV
8
Standard
MERV
11
Superior
MERV
13
Best

MERV 8 - filters pollen, dust mites, mold, and larger dust particles like pudding mix MERV 11 - filters pollen, dust mites, mold, auto emissions, and large particles like milled flour MERV 13 - filters pollen, dust mites, mold, all bacteria, proplet nuclei (sneeze), and tobacco smoke

ea
Thumb

21 X 24.5 X 4.5 MERV 8 21 X 24.5 X 4.5 MERV 11 21 X 24.5 X 4.5 MERV 13

Actual: 20.75x24.25x4.38"

Designed to Fit:
RXHF-E24AM10 RXHF-E24AM13

Select MERV Rating
MERV
8
Standard
MERV
11
Superior
MERV
13
Best

MERV 8 - filters pollen, dust mites, mold, and larger dust particles like pudding mix MERV 11 - filters pollen, dust mites, mold, auto emissions, and large particles like milled flour MERV 13 - filters pollen, dust mites, mold, all bacteria, proplet nuclei (sneeze), and tobacco smoke

ea