The GermGuardian FLT4100 is a genuine combination replacement filter for GermGuardian air purifiers. It pairs a HEPA layer rated to capture 99.97% of particles down to 0.1 microns with an activated carbon pre-filter that traps hair and dust and absorbs odors and volatile organic compounds. It fits the AC4100, AC4175W, AC4150P and AC4150BL models. Buyers rate it highly, and the main trade-off against generic filters is the genuine fit and the carbon layer, which needs replacing sooner than the HEPA media.
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Owners rate this filter highly and mostly praise the fit and the odor control. Complaints center on how often the carbon layer needs changing and on the higher cost of the genuine part.
The GermGuardian FLT4100 HEPA Replacement Filter E is a genuine combination filter for GermGuardian air purifiers. Its HEPA filter captures 99.97% of dust, allergens and wildfire smoke particles down to 0.1 microns. It also traps pollen, bacteria and pet dander.
An activated carbon pre-filter catches dust, pet hair and other large particles, which extends the life of the HEPA filter. The treated carbon absorbs volatile organic compounds and reduces odors from smoking, cooking and pets.
