20X25X1 Pleated MERV 12 Air Filters 6 Pack | Actual Size: 19 1/2 X 24 1/2 X 3/4
Model Number 20x25x1. Changing your air filter is the first step in insuring your HVAC system runs at its optimal level this season. A human hair is about 100 microns wide. As a result, it is not necessary to add any potentially irritating chemicals to the air filter to kill germs.