About This Item
Deep-pleated cartridges like this are built for whole-house air cleaners, giving you more media area and longer service life than a standard 1‑inch furnace filter. The 20x20x4.5 synthetic cartridge uses electrostatic polypropylene/polyethylene media with a MERV 8 rating to capture common household contaminants and some bacteria while keeping airflow resistance relatively low. Designed as a replacement for select Honeywell and Air Bear-style air cleaner housings.
