Use this filter as a replacement for models AC3900, AC4000, and AC4000CA.
The GermGuardian® Table-Top Air Purifier has one combination replacement filter that combines several filtering technologies. A combination HEPA filter captures 99.97% of dust and allergens, and fights germs and unwanted odors. It is suggested that the filter be replaced every 6-9 months depending on use.
This is a GENUINE GermGuardian® Filter. It is important to only use genuine Guardian Technologies™ replacement parts to maintain product performance and warranty. All parts that are not genuine will void the warranty.