Quest® MERV 13 Pleated Air Filter, 18"x20"x2", Replacement Air Filter For Quest Dehumidifiers, Part #4038233, Single Filter Superior MERV13 filtration removes more harmful contaminants from the air such as dust, pollen, mold, bacteria, and some viruses to prevent cross-contamination and unhealthy conditions. MERV13 filtration is 65% more effective in capturing dangerous particulates from the air than MERV-8, and still 20% more effective than MERV11 filters. The MERV-13 air filter for the Quest 506/746/876 dehumidifier is essential for keeping your air safer and the internal components of your machine cleaner for long-lasting performance. Requires two per unit. Highlights Ultra-efficiency for labs, hospitals and data centers. Trap dust and particles in furnaces, air handlers and HVAC systems. Pleated design for higher dust and particle holding capacity. Manufacturer's Product Specifications for Quest MERV 13 Filter This MERV 13 pleated filter is designed to be used with select Quest dehumidifiers. These units require 2 filters for operation. Part Numbers: 4038233 - Single Filter 4041913 - Filters, 12-Pack Requires: 2 per unit Size: 18" x 20" x 2" Compatible Products Quest 506 - PN 4036600 Quest 506 277V - PN 4036610 Quest 746 480V - PN 4037610 Quest 876 - PN 4037600 Quest 706 50-Hz - PN 4041800