GermGuardian AC4825E

Room Air Purifiers / Medium Room (150 to 350 sq. ft.)

This air purifier from GermGuardian has

a filter indicator
3 speeds

It’s designed for floor or tabletop use in a 153 sq ft space and weighs 8 pounds.

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CR's Expert Take

How did it perform in our owner surveys and expert lab testing?

Overall Score

The Overall Score for this model incorporates our expert lab test results, as well as ratings for that brand’s reliability and owner satisfaction from our annual product owner survey of members.

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Current Range of Tested Room Air Purifiers

What goes into the Overall Score?

OWNER SURVEYS

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Dust, pollen, smoke removal (low)

/ 5

Dust, pollen, smoke removal (high)

/ 5

Noise (low speed)

/ 5

Noise (high speed)

/ 5

Ease of use

/ 5

Annual cost ($)

/ 5

Detailed Test Results

Mediocre at removing dust, smoke, and pollen from a room’s air when run at its highest speed, and less effective at low speed. This model is relatively loud on low speed but was somewhat noisy (though average) on its highest speed. Easy to operate its controls, carry it, and clean or replace its filter(s).

About

Overall score for the GermGuardian AC4825E is mainly how well the model removed dust and smoke from a test chamber, plus quietness for room purifiers and airflow resistance for whole-house units.
Dust/pollen/smoke removal: How well models cleared air of fine clay dust and cigarette smoke; performance of portables is at their highest and lowest speeds. Ones that scored well for dust removal should perform comparably for pollen.
Noise: Based on instrument measurements with a portable model running at its highest and lowest speeds.

Brand Reliability & Satisfaction

#? in Reliability of all Room Air Purifier Brands

Did the brand perform consistently well over time?

PREDICTED RELIABILITY SCORE

/ 100

Predicted brand reliability scores are based on the likelihood of newly purchased air purifiers experiencing a problem, adjusted for extended warranty or service contract status and product usage, by the end of the 5th year of ownership. Higher scores mean better reliability. Ranked #? of 50

Would our members recommend this brand?

OWNER SATISFACTION SCORE

/ 100

Brand owner satisfaction scores are based on how likely owners are to recommend their air purifier to their friends and family. Ranked #? of 50

Source: Consumer Reports' 2023, 2024, and 2025 Summer Surveys

Features & Specs

Features

Filter-life indicator

Yes

Remote control

Auto fan speed

Smartphone app

VOC Sensor

High efficiency particulate air (HEPA) filter

Yes

Carbon

Yes

Ionization

Electrostatic

Plasma

Mechanical Filter

Specs

Annual Electricity Cost ($)

Annual Filter Cost ($)

Product type

Carbon/HEPA/UV

Weight (lbs.)

8.3

Energy Star

Yes

Number of fan speeds

Particle Sensor Display

Pre-Filter Maintenance

Main Filter Maintenance

Replace

Price & Shop

GermGuardian AC4825E

CR's Expert Take

Overall Score

What goes into the Overall Score?

Detailed Test Results

About

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