20x20x4 (3 5/8) Pleated Air Filters MERV 15 Plus Carbon

20x20x4 (3 5/8) Pleated Air Filters MERV 15 Plus Carbon

Marsoni

M251S

$56.99

Get it in 3 business days with 1 day shipping. Friday, May 29

20x20x4 (3 5/8) Pleated Air Filters MERV 15 Plus CarbonActual Size: 19 1 2 x 19 1 2 x 3 5 8 (19. 5 x 19. 5 x 3. 63) Airborne dust, pollen, mold spores, pet dander, smog, dust mite debris, smoke, and bacteria are captured and helps eliminate unwanted odors and other contaminants. If you are replacing a Honeywell or Lennox 20x20x4 Plus Carbon or an air filter with an MPR rating with an actual depth of 4 3 8, please see our 20x20x5 (4 3 8 actual depth) Hypoallergenic, antimicrobial, and electrostatic filter

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I had high hopes for this, but sadly, it fell short. I have to wear a CPAP mask at night & the dry mouth is just one of the things I hate about it. I saw this, read the reviews & decided to give it a try. I used it per the directions, but it really did nothing to alleviate the dry mouth. I'm giving it 2 stars because it doesn't taste bad, but that's the only good thing I can say about this.

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Reviewed in the United States on February 9, 2026