GermGuardian AC4100 HEPA Air Purifier
- 375 sq. ft. rooms at 1 air change per hour
- 4.8 air changes per hour in 78 sq. ft.
- True HEPA, 99.97% to .3 microns (spec: 0.1 micron)
- UV-C light with titanium dioxide
- Charcoal filter for odors, plus pre-filter
- 3 speed settings, manual controls
- 55 db noise level
- 11 inch tabletop, 5.2 pounds
Last refreshed Sep 8, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A compact tabletop purifier with HEPA, charcoal and UV-C stages for a small room or office. It turns over larger rooms too slowly to make much difference.
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ASIN: B00G7VNO86Model: AC4100Category: HEPA Air Purifiers
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Overview
Not a floor unit, this GermGuardian purifier is a compact tabletop model that layers a pre-filter, a True HEPA filter, a charcoal filter and a UV-C light. Air drawn through the stages loses dust, pet dander, pollen and odors, and the UV-C light works on airborne germs.
Several cleaning stages in a desk sized body is the reason to buy for a small room or office. Its airflow turns over a mid sized room only slowly, so larger rooms need a bigger unit, and the UV-C bulb is one more part to maintain.
Who it's for
Small rooms and offices with dust, pet dander or cooking odors suit it, set on a desk or shelf. Large spaces get too few air changes from a unit this size.
Pros and cons
- True HEPA filter
- Charcoal layer reduces odors
- UV-C light targets airborne germs
- Pre-filter extends HEPA life
- Few air changes in larger rooms
- Particle size listed two ways
Performance notes
Air changes per hour govern results: the smaller the room, the more often the same air passes through the HEPA filter. The pre-filter catches hair and large dust first, so the HEPA layer clogs more slowly. The UV-C light and titanium dioxide work on germs and volatile organic compounds as air passes.
Specifications
| Brand | GermGuardian |
|---|---|
| Model | AC4100 |
| Dimensions & fit | |
| Particle Retention Size | 0.1 micron (bullets: .3 microns) |
| Item Dimensions D x W x H | 7.75 x 6.5 x 11 inches |
| Item weight | 5.2 pounds |
| Capacity & performance | |
| Noise Level | 55 db |
| Power & efficiency | |
| Power Source | Corded electric |
| Construction & materials | |
| Color | Grey |
| Included components | |
| Included Components | Air purifier, HEPA filter, UV-C bulb, user manual |
| Warranty & support | |
| Warranty Description | 1 year |
| Other details | |
| Floor Area | 375 sq. ft. at 1 change per hour; 78 sq. ft. at 4.8 changes per hour |
| Filter Type | Pre-filter, True HEPA, charcoal, UV-C |
| Contaminant Filtration Capability | 99.97% |
| Control Type | Manual controls, 3 speeds |
| Special Features | Tabletop, UV-C with titanium dioxide |
| Specification Met | CARB certified |
Frequently asked questions
What comes in the box with the GermGuardian tabletop purifier?
The air purifier, a HEPA filter, a UV-C bulb and a user manual.
Can the GermGuardian tabletop purifier clean a large living room?
It circulates the air once per hour in a 375 sq. ft. room and 4.8 times per hour in a 78 sq. ft. room, so it is sized for small rooms and offices.
What does the GermGuardian UV-C light do?
It helps kill airborne viruses such as influenza, staph and rhinovirus, and works with titanium dioxide to reduce volatile organic compounds.
Does the GermGuardian purifier remove odors?
Yes. An activated charcoal filter helps reduce odors from pets, smoke and cooking fumes.