Includes 12 Pre-Filters - Enough for approximately 1 year
Pre-Filters - 12 Polyester pre filters are included with each annual filter kit. The pre filter is changed monthly and removes larger particles such as lint, hair, dust and pollen. The pre filter is important because not only does it remove the larger particles, it also helps prolong the life of the HEPA filter in the system. Essentially, the pre filter is the first line of defense in maintaining your system; therefore promoting better indoor air quality.
Pre-filters cannot be washed and must be changed monthly.