18x20x4 AIRx ALLERGY Air Filter - MERV 11

AIRx 18x20x4-ALLERGY | Our#: 179979
6 pack

18x20x4 AIRx ALLERGY Air Filter - MERV 11

  • MERV 11 Rated
  • Change Every 6 Months
  • 18x20x4" Nominal
  • 17½x19½x3¾" Actual
$112.10 $119.99
Case of 6 Filters, $18.68 ea
In Stock
Ships Today
Est. Delivery By Dec. 26th

18x20x4 AIRx ALLERGY Air Filter - MERV 11

(Actual Size 17.5" x 19.5" x 3.75")

Better filtration is the first step in improving Indoor Air Quality. Pleated Panel Filters outperform ordinary furnace filters with higher efficiency and lower pressure drop allowing air-handling systems to stay cleaner and operate more efficiently. We achieve this with 100% synthetic electrostatically charged gradient density media, optimum pleat spacing and high initial and sustained efficiency, high dust holding capacity and very low pressure drop. The media is resistant to a wide range of chemicals, does not absorb moisture and will not support microbial growth.


  • Great for helping reduce airborne allergens such as bacteria, particles that carry viruses, pollen, mold spores, fine dust, and pet dander.
  • Filter material will not support the development of mold, mildew, bacteria or other microorganisms in normal use.
  • No chemicals added. Filters are chemical free!
  • Over 30-times more efficient at capturing micro particles than ordinary fiberglass filters.
  • Lasts UP TO 3 months!


  • MERV 11 Rating
  • 100% synthetic gradient media, electrostatically charged
  • 30 gauge galvanized expanded metal grid
  • Moisture resistant double wall beverage board
  • Media pack totally bonded to frame
  • This product is listed and rated by Underwriters Laboratories as U.L. Class 2.