Honeywell POPUP2400/U Filter, 16 x 5 7/8 x 27 1/8 in. is designed to provide efficient air filtration for your home or office environment. This filter conveniently stores flat and pops into shape for easy installation, making hassle-. Compatible with SpaceGard 2400, 2140, and Lennox PMAC12 systems, it measures 16 inches wide, 5 7/8 inches deep, and 27 1/8 inches high. The filter features a MERV 11 rating, effectively capturing small particles ranging from 0.3 to 1 micron (E1) as well as medium particles from 1 to 3 microns (E2), ensuring cleaner air and improved indoor air quality for domestic use.