A: 19.75 x 19.875 x 4.375 Answer provided by:  Janice Seltzer (8/10/2015)

A: The life span of a filter really depends on many factors. Smoking, pets, pollen and what the household environment is like. 6 months is usually the recommended time frame to change your filters. But again it really depends on the home environment. Answer provided by:  Janice Seltzer (9/30/2013)