#84

GermGuardian

GermGuardian Air Purifier AC4100CA

Name: Air Purifier AC4100CA
Brand: GermGuardian
SKU: B00G7VNO86
Price: 39 JPY
Availability: InStock
Rating: 3.125 (1 reviews)

Rating

Model: AC4100

$39(incl. tax)Amazon price as of 2025-09-02

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Product Overview

The GermGuardian AC4100CA is a compact desktop air purifier designed for small rooms up to 375 sq. ft. It features a True HEPA filter that captures 99.97% of dust, pollen, pet dander, and other allergens. Additionally, it includes a UV-C light to help reduce airborne viruses and an activated charcoal filter to reduce odors from pets, smoke, and cooking. With three-speed settings, it offers basic air purification in a small package.

Product Specifications

Applicable Area

375sq ft

CADR (Smoke)

-CFM

CADR (Dust)

-CFM

CADR (Pollen)

-CFM

Filter Type

HEPA, Charcoal, UV-C

Number of Fan Speeds

Noise Level (Min)

-dB

Noise Level (Max)

-dB

Power Consumption

-W

Smart Features

Size & Weight

Weight

5.2 Pounds

Hight

11 inches

Width

6.5 inches

Depth

7.75 inches

Features

Odor Sensor Function

Feature Description

Equipped with a sensor that detects odors in the room and automatically adjusts the air purification level. This allows for quicker response to sudden smells, such as cooking odors or pet odors, and ensures the air remains fresh without requiring manual adjustments.

About This Product

This air purifier does not have an odor sensor function. Therefore, it cannot automatically adjust its settings based on the presence of odors, requiring manual adjustments to address unwanted smells.

Dust Sensor Function

Feature Description

Equipped with a sensor that detects dust particles in the air and automatically adjusts the air purification level. The air purifier can automatically increase its fan speed when it detects a high concentration of dust, like during cleaning or when opening windows, ensuring efficient particle removal.

About This Product

This air purifier lacks a dust sensor function. It cannot automatically detect and respond to changes in dust levels, meaning users must manually adjust settings based on perceived air quality.

PM2.5 Display Function

Feature Description

Displays the concentration of PM2.5 (fine particulate matter) in the air. Allows you to visually monitor the air quality in your room. You can use this information to better understand the effectiveness of the air purifier and take appropriate actions based on real-time air quality data.

About This Product

The GermGuardian AC4100CA does not feature a PM2.5 display. Users cannot visually monitor the level of fine particulate matter in the air, making it difficult to assess the air purifier's effectiveness in real-time.

Filter Replacement Indicator Function

Feature Description

Indicates when the filter needs to be replaced. This ensures that the air purifier operates at optimal efficiency. Prevents reduced air purification performance due to a clogged filter, maintaining consistent air quality.

About This Product

This air purifier does not have a filter replacement indicator. Users need to manually track filter usage and replace it based on a schedule or visual inspection, which may lead to suboptimal performance if filters are not changed promptly.

Child Lock Function

Feature Description

Disables the control panel to prevent unintended changes to the settings. This prevents children from accidentally turning off the air purifier or changing the settings. Provides peace of mind when the air purifier is placed in areas accessible to children.

About This Product

The GermGuardian AC4100CA does not include a child lock function. This means that settings can be easily altered by children, potentially disrupting the air purification process and requiring frequent readjustments.

Sleep Mode Function

Feature Description

Reduces the operating noise and dims the display lights for quiet operation during sleep. Allows for comfortable use in the bedroom without disturbing sleep. This is ideal for those who are sensitive to noise or light while sleeping.

About This Product

This air purifier does not have a dedicated sleep mode. Users may find the noise level disruptive during sleep, as there is no option to reduce fan speed and noise for quieter operation.

SHOPSTAFF Rating Score

#84

Ranked #84 out of 100 products in Category

3.1

Overall Rating

The GermGuardian AC4100CA is a basic, budget-friendly air purifier suitable for small spaces. It lacks advanced features like air quality sensors or smart controls, making it a simple option for those with minimal needs. Its compact size and low price point make it accessible, but its long-term durability may be limited.

Coverage Area (CADR)

2.5

Rating Criteria Explanation

The Coverage Area, often indicated by the Clean Air Delivery Rate (CADR) in cubic feet per minute (CFM) or square footage, is a critical factor. It determines how large of a room the air purifier can effectively clean. Consider the size of the room where you intend to use the air purifier. If you have a large living room, a model with a higher CADR is essential to ensure that the air is being effectively filtered throughout the space. Choosing an air purifier with an inadequate CADR for the room size will result in subpar air purification. DBFIT's AP300 is designed for large rooms up to 3000 sq. ft, which is a considerable coverage area, so if you have a smaller space, you may want to look for a more appropriately sized unit, while those with very large areas should confirm that this CADR is sufficient.

Rating Comments

With coverage up to 375 sq. ft, this air purifier is best suited for small rooms or personal spaces. It may not be effective in larger areas, limiting its overall utility in homes with open floor plans or larger rooms.

HEPA Filter Quality and Type

4.0

Rating Criteria Explanation

The HEPA filter is the heart of any HEPA air purifier. It's crucial to understand the quality and type of HEPA filter used. A true HEPA filter is certified to capture 99.97% of particles as small as 0.3 microns, including dust, pollen, pet dander, and mold spores. Some air purifiers may use 'HEPA-like' or 'HEPA-type' filters, which may not meet the same rigorous standards. Ensure the product explicitly states it uses a 'true HEPA' filter. Also, consider if the filter is combined with other filtration layers (e.g., activated carbon for odor removal). The DBFIT AP300 utilizes a HEPA filter; confirming it's a 'true HEPA' filter based on specifications is advisable.

Rating Comments

The True HEPA filter captures 99.97% of particles as small as 0.3 microns, effectively removing common allergens and pollutants. This ensures a high level of air purification, contributing to a healthier environment.

Pre-filter and Filter Replacement

3.0

Rating Criteria Explanation

A pre-filter is usually the first line of defense in an air purifier, capturing larger particles like dust and pet hair. This extends the life of the more expensive HEPA filter. Look for a model with a washable pre-filter for easy maintenance. Filter replacement is an ongoing cost, so consider the cost and availability of replacement HEPA filters. Some manufacturers offer subscription services for filter replacements. Check how often the filters need to be replaced (usually every 6-12 months, depending on usage and air quality) and factor that into the overall cost. The DBFIT AP300 features a washable filter which will reduce your long term costs, and should be considered a major benefit.

Rating Comments

The pre-filter extends the life of the HEPA filter by trapping larger particles. However, the need for regular filter replacements adds to the long-term cost of ownership, and a washable pre-filter would have been more convenient.

Activated Carbon Filter (Odor Removal)

3.5

Rating Criteria Explanation

While HEPA filters excel at removing particulate matter, they don't address odors, gases, or volatile organic compounds (VOCs). An activated carbon filter is essential for removing these pollutants. The thickness and quality of the carbon filter significantly impact its effectiveness. Some air purifiers have a separate activated carbon filter, while others combine it with the HEPA filter. If you are sensitive to odors or live in an area with high levels of air pollution, prioritizing an air purifier with a substantial activated carbon filter is important. Ensure the carbon filter is replaceable as it will become saturated over time. Examine the product details to see if the DBFIT AP300 has one or if that needs to be supplemented with another filter.

Rating Comments

The activated carbon filter helps reduce odors from pets, smoke, and cooking, improving the overall air quality. However, the effectiveness may be limited compared to air purifiers with more substantial carbon filters.

Noise Level

3.0

Rating Criteria Explanation

The noise level of an air purifier is a significant consideration, especially if you plan to use it in a bedroom or office. Air purifiers have different fan speeds, and the noise level increases with higher speeds. Look for a model with a low noise level (measured in decibels, dB) on its lowest setting. Some air purifiers have a 'sleep mode' that operates at an even quieter level. Consider your sensitivity to noise and the intended use of the air purifier when evaluating noise levels. If possible, read reviews to get an idea of the actual noise level in real-world use. The DBFIT AP300 may not have a published noise level so reviews are important.

Rating Comments

While the noise level isn't specified, user reviews suggest it can be noticeable, especially on higher settings. This may be a concern for those sensitive to noise or planning to use it in quiet environments like bedrooms.

Air Quality Sensor and Auto Mode

1.0

Rating Criteria Explanation

Many modern air purifiers come equipped with an air quality sensor that detects the level of pollutants in the air. This sensor allows the air purifier to automatically adjust the fan speed based on the air quality, optimizing performance and energy consumption. Look for a model with a reliable and accurate air quality sensor. The 'auto mode' is a convenient feature that allows the air purifier to run efficiently without constant manual adjustments. The DBFIT AP300 includes a PM2.5 display and an air quality sensor, which is a notable feature for automatic operation.

Rating Comments

The absence of an air quality sensor and auto mode means the fan speed must be manually adjusted. This requires more user intervention and may not optimize energy consumption or air purification efficiency.

Manufacturer Reliability and Warranty

4.0

Rating Criteria Explanation

The reliability of the manufacturer and the warranty offered are crucial indicators of product quality and durability. Research the manufacturer's reputation for producing reliable air purifiers. Look for customer reviews and ratings to get an idea of their experience with the brand. A longer warranty period (e.g., 2 years or more) indicates that the manufacturer has confidence in their product. Also, check the warranty terms and conditions to understand what is covered. A good warranty should cover defects in materials and workmanship. Having readily available customer support is also a plus. Unknown reliability may be a factor for DBFIT and should be investigated before purchasing.

Rating Comments

GermGuardian is a known brand, but the warranty information is not readily available. This may raise concerns about long-term reliability and support, requiring potential buyers to research warranty details.

Cost Performance

4.0

Rating Criteria Explanation

Cost performance is the final balancing act. While it's tempting to go for the cheapest option, consider the long-term costs. Factor in the cost of replacement filters, electricity consumption, and the potential lifespan of the air purifier. A slightly more expensive model with better filter life, lower energy consumption, and a longer warranty might be a better value in the long run. Compare the features and performance of different models within your budget and choose the one that offers the best balance of price and performance. Assess whether the DBFIT AP300's price aligns with its features and coverage area compared to other available options.

Rating Comments

Given its low price point and basic features, the GermGuardian AC4100CA offers reasonable cost performance. It provides essential air purification for those on a budget, but it lacks the advanced features found in higher-end models.

Brand & Manufacturer Details

GermGuardian

Guardian Technologies offers a range of air purification solutions designed to improve indoor air quality and promote a healthier living environment.

Considerations

UV-C bulb replacement not indicated
Filter replacement required
Not suitable for large rooms

Recommended For

Individuals with allergies in small spaces
Office workers in cubicles
Those on a tight budget

Not Recommended For

Those with large living spaces
Individuals requiring smart features
Those sensitive to noise

Suitable For

Small bedrooms
Offices
Dorm rooms

Not Suitable For

Large living rooms
Cars
Outdoor use

Frequently Asked Questions (FAQ)

Q.I'm concerned about the air quality in my small office. Will this air purifier be effective in removing dust and odors?

A.The GermGuardian AC4100CA is designed for small spaces, covering up to 375 square feet. Staff confirmation indicates it effectively filters airborne dust and particulates, and reduces odors, especially in the initial months of filter use. For optimal performance, it's recommended for rooms that can be closed off and aren't larger than 150 sqft.

Q.I'm concerned about the air quality in my small office. Will this air purifier be effective in removing dust and odors?

Q.I'm sensitive to noise. How loud is this air purifier?

A.The noise level varies depending on the setting. While some staff confirmation mentions it can be loud, like a computer fan on high, others find the white noise helpful for blocking out distractions. The lowest setting may be suitable if you prefer a quieter environment, but it's worth noting that the highest setting might be too loud for phone calls or conversations in the same room.

Q.I'm sensitive to noise. How loud is this air purifier?

Q.Does the UV-C light feature really help with germs and viruses?

A.Yes, the UV-C light in the GermGuardian AC4100CA helps kill airborne viruses such as influenza and staph. It works with Titanium Dioxide to reduce volatile organic compounds. Please note that its effectiveness has been tested with specific types of bacteria, viruses, and mold spores.

Q.Does the UV-C light feature really help with germs and viruses?

Q.How often do I need to replace the filter, and is it easy to find replacements?

A.The filter replacement frequency depends on usage, but replacements are easy to find on Amazon. Look for GermGuardian "E" type filters. The unit has a dial to remind you when to change the filters.

Q.How often do I need to replace the filter, and is it easy to find replacements?

A.The filter replacement frequency depends on usage, but replacements are easy to find on Amazon. Look for GermGuardian "E" type filters. The unit has a dial to remind you when to change the filters.

Q.I have allergies. Will this air purifier help?

A.Yes, this air purifier uses a True HEPA filter that reduces up to 99.97% of harmful germs, dust, pollen, pet dander, mold spores, and allergens as small as .3 microns. Staff confirmation reports it can significantly reduce allergy symptoms.

Q.I have allergies. Will this air purifier help?

SHOPSTAFF Rating Ranking

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Applicable Area	3385 sq ft	CADR (Smoke)	- CFM
CADR (Dust)	- CFM	CADR (Pollen)	- CFM
Filter Type	Activated Carbon	Number of Fan Speeds	-
Noise Level (Min)	- dB	Noise Level (Max)	35 dB
Power Consumption	4 W	Smart Features	Yes

Odor Sensor FunctionDust Sensor FunctionPM2.5 Display FunctionFilter Replacement Indicator FunctionChild Lock FunctionSleep Mode Function

4.6Overall Rating

4.8Coverage Area (CADR)

4.7HEPA Filter Quality and Type

4.0Pre-filter and Filter Replacement

4.6Activated Carbon Filter (Odor Removal)

4.7Noise Level

4.9Air Quality Sensor and Auto Mode

4.5Manufacturer Reliability and Warranty

4.2Cost Performance

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Applicable Area	1560 sq ft	CADR (Smoke)	- CFM
CADR (Dust)	- CFM	CADR (Pollen)	- CFM
Filter Type	True HEPA, Active Carbon Filter, Pre-Filter	Number of Fan Speeds	-
Noise Level (Min)	22 dB	Noise Level (Max)	52 dB
Power Consumption	66 W	Smart Features	No

Odor Sensor FunctionDust Sensor FunctionPM2.5 Display FunctionFilter Replacement Indicator FunctionChild Lock FunctionSleep Mode Function

4.5Overall Rating

4.5Coverage Area (CADR)

4.7HEPA Filter Quality and Type

4.3Pre-filter and Filter Replacement

4.5Activated Carbon Filter (Odor Removal)

4.6Noise Level

4.8Air Quality Sensor and Auto Mode

4.3Manufacturer Reliability and Warranty

4.2Cost Performance

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Applicable Area	1881 sq ft	CADR (Smoke)	- CFM
CADR (Dust)	- CFM	CADR (Pollen)	- CFM
Filter Type	HEPA, Carbon	Number of Fan Speeds	-
Noise Level (Min)	27 dB	Noise Level (Max)	- dB
Power Consumption	65 W	Smart Features	Amazon Alexa, Google Assistant

Odor Sensor FunctionDust Sensor FunctionPM2.5 Display FunctionFilter Replacement Indicator FunctionChild Lock FunctionSleep Mode Function

4.5Overall Rating

4.5Coverage Area (CADR)

4.7HEPA Filter Quality and Type

4.3Pre-filter and Filter Replacement

4.5Activated Carbon Filter (Odor Removal)

4.6Noise Level

4.8Air Quality Sensor and Auto Mode

4.0Manufacturer Reliability and Warranty

4.3Cost Performance

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Winix

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$189(incl. tax)Amazon price as of 2025-09-02

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Applicable Area	1881 sq ft	CADR (Smoke)	- CFM
CADR (Dust)	- CFM	CADR (Pollen)	- CFM
Filter Type	HEPA, Carbon	Number of Fan Speeds	-
Noise Level (Min)	27 dB	Noise Level (Max)	- dB
Power Consumption	50 W	Smart Features	Wifi

Odor Sensor FunctionDust Sensor FunctionPM2.5 Display FunctionFilter Replacement Indicator FunctionChild Lock FunctionSleep Mode Function

4.5Overall Rating

4.5Coverage Area (CADR)

4.7HEPA Filter Quality and Type

4.3Pre-filter and Filter Replacement

4.5Activated Carbon Filter (Odor Removal)

4.6Noise Level

4.8Air Quality Sensor and Auto Mode

4.0Manufacturer Reliability and Warranty

4.2Cost Performance

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LEVOIT

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LEVOIT Air Purifier for large rooms up to 1875 sq ft with washable pre-filter and air quality monitor.

Applicable Area	1875 sq ft	CADR (Smoke)	250 CFM
CADR (Dust)	254 CFM	CADR (Pollen)	289 CFM
Filter Type	3-Stage Filter	Number of Fan Speeds	-
Noise Level (Min)	- dB	Noise Level (Max)	- dB
Power Consumption	- W	Smart Features	App

Odor Sensor FunctionDust Sensor FunctionPM2.5 Display FunctionFilter Replacement Indicator FunctionChild Lock FunctionSleep Mode Function

4.4Overall Rating

4.3Coverage Area (CADR)

4.5HEPA Filter Quality and Type

4.3Pre-filter and Filter Replacement

4.3Activated Carbon Filter (Odor Removal)

4.5Noise Level

4.7Air Quality Sensor and Auto Mode

4.0Manufacturer Reliability and Warranty

4.3Cost Performance

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GermGuardian Air Purifier AC4100CA

Product Overview

Product Specifications

Size & Weight

Features

SHOPSTAFF Rating Score

Brand & Manufacturer Details

Considerations

Recommended For

Not Recommended For

Suitable For

Not Suitable For