Ultravation 91-013 20x20x5 MERV 11 Filter - 4 Pack

Ultravation 91-013 air filter is the OEM (original equipment manufacturer) replacement for your system. The manufacturer of your system recommends that you replace your air filter with the filter specifically designed for it. The actual size of the Ultravation air filter model 91-013 is approximately 19 3/4" x 20 3/4" x 4 3/4". The Ultravation 91-013 is the 20 x 20 x 5 replacement MERV 11 Progressive Media air filter for the following Ultravation whole house air cleaner models: Progressive Media Straight-Through Design Whole House Air Cleaner models: 90-016 Photronic Straight-Through Design Multistage Whole House Air Cleaner Models: 92-031, 92-032, 92-033, 92-121, 92-122, 92-123 MERV 11 performance Low pressure drop Progressive particulate capture for long life 100% Synthetic Fibers Stable Media Charge High Initial Efficiency Thermally Bonded Fibers resist shedding Media does not absorb moisture Continuous fibers No chemical binders The manufacturer recommends you change the 91-013 disposable filter every 6 months under normal operating conditions. This package ships with 4 filters.