GermGuardian AC4100 Review

A speaker like design air purifier with the latest UV Technology, among GermGuardian AC4100 long list of features, affordable price tag is arguably its main advantage in this competitive small air purifier market. With a versatile body framework that is portable for its segment, is GermGuardian AC4100 adaptive enough to take on other entry-level air purifiers? Hit the break to learn more about the 4-stage AC4100.
± 69.99 p
     Annual filter ^    
± 48 - 65 p
Online price*
Latest Amazon price

GermGuardian AC4100 Specification

ProductGermGuardian AC4100
6.5 x 11 x 7.5 in
(16.5 x 27.9 x 19.1 cm)
Weight4.85 lb (2.2 kg)
Coverage (up to)60 sq. ft. (6 m2)
Dust free (CADR)
Pollen free (CADR)
Smoke free (CADR)
Airflow speed
- Lifespan
- Replacement cost ($)
Charcoal Pre-filter
6 - 9 months
HEPA filter
- Lifespan
- Replacement cost ($)
HEPA filter
6 - 9 months
Carbon filter
- Lifespan
- Replacement cost ($)
Ionizer/ Technologies
UV-light/ PCO
LB4100 UV-C Light
10 - 12 months14.99
PCO Filter
Other filter
All-in-one filter
- Lifespan
- Replacement cost ($)
FLT4100 Filter-E HEPA
6 - 9 months
Optional/ Addon
Noise level
Power consumption
Timer/ Scheduler
More color options
Auto mode
Air qualityAQ indicator
Filter change indicator
Wi-Fi/ BTBluetooth
Remote control
Child lock
Warranty1 year
Email/ Phone support

Product image

Key features

  • 4-stage filtration with 3 speed
  • Charcoal pre-filter
  • Replaceable True HEPA Filter
  • 3 fanspeed with optional UV light + PCO Filter

GermGuardian AC4100 review

  • Beautiful speaker-like body that is compact yet reliable.
  • Affordable price for a 4-stage filtration air purifier with UV technology.
  • Enhanced Charcoal + PCO Pre-filter that works well with HEPA filter.
  • UV-C light technology that can be turn off.
  • Filter replacement indicator.
  • Below average purifying coverage and filtration strength.
  • Annual filter replacement cost is high for its segment.
  • No addon features although understandable given its size and price tag.

The starters

GermGuardian AC4100 dimension
6.5 x 11 x 7.5 in
(16.5 x 27.9 x 19.1 cm)
GermGuardian AC4100 weight
4.85 lb (2.2 kg)

A speaker-like design, GermGuardian AC4100 is a compact (6.5 x 11 x 7.5 in (16.5 x 27.9 x 19.1 cm)) and lightweight ([aweight)] air purifier that does not fall short on build quality. You can easily place the air purifier at any corner of the room, shelf or table desk. On to usability, GermGuardian AC4100 is very simple to use as there is only one front dial knob for fan speed control and UV-light button. Other than that, there is nothing much in GermGuardian AC4100 other than filter replacement indicator and a standard 1 year warranty.

Airflow, CADR and everything in between

GermGuardian AC4100 coverage
Purifying coverage
60 sq. ft. (6 m2)
GermGuardian AC4100 fanspeed
As an entry-level compact air purifier, GermGuardian AC4100 estimated 60 sq. ft. purifying coverage is not great. Probably best use in close range within a small room size. The 3 speed airflow delivery rate isn't any better either although that is expected given the air purifier targeted group. No official CADR but it should follow the similar low output pattern.

What’s inside count

GermGuardian AC4100 Pre-filter
Charcoal Pre-filter
6 - 9 months
GermGuardian AC4100 HEPA filter
HEPA filter
6 - 9 months
GermGuardian AC4100 UV-light
LB4100 UV-C Light
10 - 12 months
PCO Filter
^ GermGuardian AC4100 filters/ technologies/ lifespan
As mentioned earlier, GermGuardian AC4100 is a 4-stage filtration at a very compressed body. You have the initial carbon pre-filter that handles large and smoke/ odors based particles. With those particles out of the way, the HEPA filter would uninterruptly and freely capture smaller micron size particles. As for notorious and tricky allergens including bacteria and viruses, you have the last stage UVC-light + PCO filter standing by for the last round elimination before releasing the purified air out.

Covered against

GermGuardian AC4100 VS Dust



GermGuardian AC4100 VS Pollen



GermGuardian AC4100 VS Hair

Hair/ Pet hair


GermGuardian AC4100 VS Dust mites

Dust mites


GermGuardian AC4100 VS Mold/ Mildew

Mold/ Mildew


GermGuardian AC4100 VS Pet dander

Pet dander


GermGuardian AC4100 VS Virus/ Germ

Virus/ Germ


GermGuardian AC4100 VS Tobacco smoke

Tobacco smoke


GermGuardian AC4100 VS Chemical



GermGuardian AC4100 VS VOCs



GermGuardian AC4100 VS Smoke/ Gas

Smoke/ Gas


GermGuardian AC4100 VS Odor



In general GermGuardian AC4100 effective plus purifying coverage and airflow delivery rate is magnificent in clearing away common airborne pollutants notably dust, pet hair. stand up against allergens, irritants, bacteria, GermGuardian AC4100 bundled , 3 fanspeed and 4-stage filtration is at somewhat average grade in destroying mold, spores, mildew, pollen, germs, dust mites and pet dander.  On odors, smokes and fumes, GermGuardian AC4100 filtration is weak in tackling cooking odors, radon, ammonia chemicals, VOCs, tobacco and cigarette smokes.

Keep it down

GermGuardian AC4100 has a very decent noise level return that triumph most air purifiers in the category. At low to medium speed, barely any noise can be heard and mild noise at higher speed. Great for all occasion but works best for night use. Power consumption is equally good with overall low usage at all speed.

At what cost

GermGuardian AC4100 MRSP/ RSP
+- 69.99
GermGuardian AC4100 annual filter replacement cost
Annual Filter Cost
+- 48 - 65
^ Replacement filters/ estimated cost
Other than the different variants from GermGuardian, GermGuardian AC4100 it's the only few affordable air purifier that comes with carbon pre-filter and UV-C light. While the comprehensive 4-stage filtration is good to have, it does add-up to the annual maintenance cost although not much. Do keep in mind that the recurring cost will eventually stack up in long-run that might not be so feasible for those looking for an one-off deal. For a more "permanent" one time solution, see the below options.

The challengers

Hamilton Beach TrueAir Compact Pet 04384

Hamilton Beach TrueAir Compact Pet 04384

Similar price range that utilize a permanent HEPA-grade filter with very low annual replacement cost. Downside is the weaker filtration depth and lacks UV-light technology.

Airfree Iris 3000

Only one-off fee with absolutely no recurring cost as it uses Patented Thermodynamic TSS Technology purification. Purifying coverage is not great either and very expensive to begin with.

Verdicts and ratings

Build quality
Airflow delivery
Particle Filtration
Smoke Filtration

Frequently Asked Questions FAQ


Safety Tips

More on GermGuardian AC4100 3-in-1 Air Cleaning System

Equivalent to most air purifiers in regards to design, GermGuardian AC4100 3-in-1 Air Cleaning System comes with standard air purifier equipment plus UV technology. Identical aesthetic to a single speaker with well suited dimension for day to day use. GermGuardian AC4100 3-in-1 Air Cleaning System total weight is pretty light and ideal at office, bedroom or living hall. Moving to reliability and durability of the air purifier, GermGuardian AC4100 3-in-1 Air Cleaning System fitting quality is evident even from far. The materials utilized in the body configuration are wonderfully integrated without any type of notable gap. Handy and sensible front dial knob is absolutely bliss to use.

Applicable area and airflow

This is where the numbers count. GermGuardian AC4100 3-in-1 Air Cleaning System air purifier is ideal for house with restricted space, the all round purifying coverage area is rather limited. Put next to rather alike segment competitors, the applicable radius is very weak. As for the airflow delivery rate, GermGuardian AC4100 3-in-1 Air Cleaning System all-round purifying airflow delivery rate and duration needed to increase the surrounding in house air is not the best in its class. You do get bundled with the highly useful UV light as an extra layer filtration. While there is still ample amount of adjustment you could set to boost the purifying input and outtake performance in accordance to your environment.

Noise level and power consumption

Comes with a specially designed motor, GermGuardian AC4100 3-in-1 Air Cleaning System noise level is low to modest that customers would appreciate it. Tremendous for bedroom as it will remain silent throughout the night. By comparison with other regular household appliances, the air purifier all round noise level is slightly better. Continue with the effectiveness of the air purifier, GermGuardian AC4100 3-in-1 Air Cleaning System power input is within acceptable bar compared to its purifying effectiveness. You would not get burden by the electricity bills on regular use. Like other equally low voltage household appliances within the class, the air purifier still has low to justifiable power input.

Filters and filtration

Highly versatile air purifier that is able to clean and wipe out particles swiftly. The charcoal pre-filter act as the first stage of defense that will capture air contaminants consisting of dust and odors originate from volatile organic compound, detergent, cigarette, paint, cooking and fireplace. Next HEPA Filter would impede air pollutants such as pet dander, mold, pollen and mildew from leaking out. Finally the UV-C light is good at eliminate germs and bacteria that are not captured by the filters. All hazardous particles will be draw and eradicate inside the air purifier.

Final thoughts on GermGuardian AC4100 3-in-1 Air Cleaning System

An effective all round air purifier, GermGuardian AC4100 3-in-1 Air Cleaning System comes with amazing body structure and top-tier fitting. The added convenient such as Filter Replacement Reminder is a nice feature to have, while the very limited purifying efficiency is something to ponder about. As a compact and simple air purifier, GermGuardian AC4100 3-in-1 Air Cleaning System is an outstanding choice for buyer that requires a cost-efficient product.

         READ MORE         

More on GermGuardian AC4100 review