Best for UV-C light effectiveness
GermGuardian AC4825
1.5 feature score
Highest scored product for this feature based on supporting review evidence.
Highest scored product for this feature based on supporting review evidence.
Reviewers repeatedly criticized the optional UV-C stage as poorly implemented or minimally useful; only one test saw a tiny added air-quality improvement.
Pros: filter availability, ozone-free operation
Cons: washable pre-filter, VOC reduction