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Coway Airmega 400 vs AirDoctor 3500i: 84 Highlights & 82 Differences — So, Which Air Purifier Actually Works Better

Find out which air purifier is right for you. We break down the Airmega 400 and AirDoctor 3500i. Still unsure between Coway Airmega 400 and AirDoctor 3500i? We compared their auto dimming display, automatic mode, fan speed levels & power surge protection and features so you can confidently pick the better air purifier.

19 Points
Coway Airmega 400
21 Points
AirDoctor 3500i
vs

Highlights 169

No extras. Just what matters.
19 Points
vs
21 Points

Why is Coway Airmega 400 better than AirDoctor 3500i ?

Scroll down for more facts

Coway Airmega 400 vs AirDoctor 3500i: A Comprehensive Air Purifier Face-Off

When it comes to breathing cleaner, fresher air at home or in your office, both the Coway Airmega 400 and the AirDoctor 3500i promise to deliver high-efficiency filtration in sleek tower designs. They share HEPA and activated carbon technologies for tackling a broad spectrum of airborne contaminants, but their approaches vary significantly in coverage capacity, filter sophistication, and smart control features. The Coway excels in large space coverage with a quiet operation, while the AirDoctor prioritizes advanced controls and robust safety features, all with a more compact footprint.

Why the Coway Airmega 400 Makes a Strong Case for Bigger Spaces

If your priority is purifying a larger area, the Airmega 400 is designed to serve spaces up to a spacious 1560 square feet, significantly outperforming the AirDoctor's 630 square feet recommendation. It offers a solid CADR rating of 400 for pollen and dust removal, alongside a noise floor as low as 22 dB, making it one of the quieter options available. 

Energy-conscious users will appreciate its efficient power consumption of just 66 watts paired with an A++ rating. The filter system includes a H13 HEPA filter with 99.97% efficiency and the unique advantage of being washable, which reduces the hassle and cost of replacements. Its portability features, such as handles and wheels, alongside a generous five-year onsite warranty, add practical value for long-term reliability.

Where AirDoctor 3500i Shines With Cutting-Edge Features and Smart Controls

The AirDoctor 3500i stakes its claim on smart functionality and superior safety measures. Although it covers a smaller area, its air changes per hour rate of 4 is double that of the Airmega 400, promoting quicker air refresh cycles for the room. It boasts a premium build with scratch-resistant materials and a taller, more robust design. 

The highlight is its 4-stage filtration system featuring an UltraHEPA filter with 99.99% efficiency and an ionizer for added pollutant elimination. On the technology front, it comes loaded with WiFi and mobile app control, including voice assistant compatibility (Alexa, Google Assistant, Siri), offering smart home integration rare at this level.

Its advanced sensors provide an impressive 98% sensor accuracy with auto-dimming display and various safety protections such as overheat, tip-over, and power surge safeguards. The fan system supports oscillation and multi-speed turbo modes, providing precise airflow control that the Airmega lacks. Furthermore, it emphasizes eco-friendly design with recyclable filters and sustainable packaging. The only notable concession is its higher noise at a minimum of 34 dB and a shorter one-year replacement warranty, which can be extended.

Quick Take

The Coway Airmega 400 triumphs for those seeking extensive room coverage, quieter operation, and lower energy use with the convenience of washable filters. In contrast, the AirDoctor 3500i is a compelling choice for tech enthusiasts valuing ultra-efficient filtration, comprehensive smart controls, and advanced safety features, even if it serves smaller rooms.

Bottom Line: Which One Should You Pick?

Ultimately, your choice hinges on your space and feature priorities. If you need a powerful purifier for large areas with whisper-quiet performance and long-term convenience, the $426.65 Coway Airmega 400 is your best bet. For a smaller space with a demand for smart home integration, enhanced safety, and ultra-fine filtration technology, the $456.75 AirDoctor 3500i stands out as a more futuristic and feature-packed option.

Verdict

  • Winner: Coway Airmega 400 - Excels in larger coverage, quieter operation, washable filters, and longer warranty, making it more practical for spacious environments.
  • Runner-up: AirDoctor 3500i - Offers superior filtration efficiency, smart connectivity, and robust safety, ideal for smaller spaces and tech-savvy users.

Comparisons 24

Two enter. One leaves your cart.

Related comparisons 24

Because one duel is never enough.

Comparisons & Facts 169

Side by side. The numbers. The features. No drama.

Is Coway Airmega 400 better than AirDoctor 3500i? It depends on what you need. Our full air purifiers comparison looks at everything from specs and value to user experience — so you can make the smarter pick between these two air purifiers.

General Information 13

Product Series

What is the product series?

59 Coway Airmega 400 0 Votes Airmega

58 AirDoctor 3500i 0 Votes 3500

Coway Airmega 400
vs
AirDoctor 3500i
Product Series

Coway Airmega 400 belongs to the Airmega series; AirDoctor 3500i is in the 3500 series, indicating different product lines.

Indicates which product line or series the model belongs to.

Color Options

What color options are offered?

58 Coway Airmega 400 0 Votes White,Graphite

71 AirDoctor 3500i 0 Votes White

Coway Airmega 400
vs
AirDoctor 3500i
Color Options

Color Options available are White, Graphite for Airmega 400 and White only for AirDoctor 3500i.

Available color variations for this model.

Control Type

What control types are available?

77 Coway Airmega 400 0 Votes Touch

79 AirDoctor 3500i 0 Votes Touch

Coway Airmega 400
vs
AirDoctor 3500i
Control Type

Control Type is Touch for both products, ensuring modern interaction.

The methods available to operate the device.

Technology Type

What technology does it use?

40 Coway Airmega 400 0 Votes HEPA, Activated Carbon

47 AirDoctor 3500i 0 Votes HEPA, Activated Carbon, VOC

Coway Airmega 400
vs
AirDoctor 3500i
Technology Type

Technology Type includes HEPA, Activated Carbon for Airmega 400, while AirDoctor 3500i adds VOC technology as well.

The primary purification technologies used by the unit.

Model Type

What type of model is this?

67 Coway Airmega 400 0 Votes Tower

69 AirDoctor 3500i 0 Votes Tower

AirDoctor 3500i
AirDoctor 3500i

Compact tower design allows it to fit easily in living rooms, bedrooms, and kitchens.

The structural style or type of the air purifier.

Design Style

What is the design style?

87 Coway Airmega 400 0 Votes Modern

89 AirDoctor 3500i 0 Votes Modern

AirDoctor 3500i
AirDoctor 3500i

Features a sleek, contemporary design that blends well with modern interiors.

The visual and structural style of the purifier’s exterior.

Display Type

What is the display type?

57 Coway Airmega 400 0 Votes LED

59 AirDoctor 3500i 0 Votes LED

AirDoctor 3500i
AirDoctor 3500i

LED display provides clear visibility of settings, air quality, and mode.

The kind of display interface provided.

Country Of Origin

What is the country of origin?

72 Coway Airmega 400 0 Votes KR

89 AirDoctor 3500i 0 Votes US

AirDoctor 3500i
AirDoctor 3500i

Designed and manufactured in the United States for high-quality standards.

The country where the product was manufactured.

Model Name

What is the model name?

71 Coway Airmega 400 0 Votes Airmega 400

63 AirDoctor 3500i 0 Votes AirDoctor 3500i

The official name or model identifier of the air purifier.

Release Year

What year was it released?

52 Coway Airmega 400 0 Votes 2018

99 AirDoctor 3500i 0 Votes 2024

The year the model was first released to market.

Intended Room Type

What room type is it intended for?

50 Coway Airmega 400 0 Votes Living Room, Bedroom

49 AirDoctor 3500i 0 Votes Bedroom, Living Room, Kitchen

Specifies what kind of room the air purifier is designed for.

Dimensions & Weight 10

Weight

What is the weight?

24.7 lbs 0 Votes
Coway Airmega 400
24.2 lbs 0 Votes
AirDoctor 3500i

Coway Airmega 400
vs
AirDoctor 3500i
Weight

Weight is close, 24.7 lbs for Airmega 400 and 24.2 lbs for AirDoctor 3500i; both are similarly portable.

The total weight of the air purifier unit.

Package Depth

What is the package depth?

17.5 inch 0 Votes
Coway Airmega 400
20 inch 0 Votes
AirDoctor 3500i

Coway Airmega 400
vs
AirDoctor 3500i
Package Depth

Package Depth is 17.5 inches for Airmega 400 compared to 20 inches for AirDoctor 3500i, with AirDoctor's package deeper.

The depth of the product packaging.

Width

What is the width?

14.8 inch 0 Votes
Coway Airmega 400
12.38 inch 0 Votes
AirDoctor 3500i

AirDoctor 3500i
AirDoctor 3500i

Approximately 31.4 cm wide, a compact size for easy placement in rooms.

The horizontal measurement of the air purifier.

Depth

What is the depth?

14.8 inch 0 Votes
Coway Airmega 400
19.87 inch 0 Votes
AirDoctor 3500i

AirDoctor 3500i
AirDoctor 3500i

Roughly 50.5 cm in depth, so it’s well-suited for tighter spaces without being bulky.

The front-to-back measurement of the purifier.

Height

What is the height?

22.8 inch 0 Votes
Coway Airmega 400
27.16 inch 0 Votes
AirDoctor 3500i

AirDoctor 3500i
AirDoctor 3500i

About 69 cm tall, roughly the height of a standard countertop appliance.

The total vertical measurement from base to top.

Package Width

What is the package width?

17.5 inch 0 Votes
Coway Airmega 400
13 inch 0 Votes
AirDoctor 3500i

AirDoctor 3500i
AirDoctor 3500i

Approximately 33 cm, suitable for boxed storage or shipping.

The width of the product packaging.

Package Height

What is the package height?

24.5 inch 0 Votes
Coway Airmega 400
28 inch 0 Votes
AirDoctor 3500i

AirDoctor 3500i
AirDoctor 3500i

Roughly 71.1 cm in height, similar to the size of a large box.

The height of the product packaging.

Package Weight

What is the package weight?

25 lbs 0 Votes
Coway Airmega 400
25 lbs 0 Votes
AirDoctor 3500i

AirDoctor 3500i
AirDoctor 3500i

Equivalent to about 11.34 kg, adding a bit of weight for shipping protection.

The total shipping weight including packaging.

Cord Length

What is the cord length?

6 ft 0 Votes
Coway Airmega 400
6 ft 0 Votes
AirDoctor 3500i

AirDoctor 3500i
AirDoctor 3500i

Equivalent to about 1.83 meters, providing ample reach for flexible placement.

The length of the power cord attached to the purifier.

Base Diameter

What is the base diameter?

Who knows? 0 Votes Coway Airmega 400 (Help us out by suggesting one!)

9.85 inch 0 Votes
AirDoctor 3500i

AirDoctor 3500i
AirDoctor 3500i

Roughly 25 cm wide, ensuring a stable base for the air purifier.

The circular base width for tower-style purifiers.

Performance & Efficiency 19

Power Consumption

What is the power consumption?

66 Watt 0 Votes
Coway Airmega 400
85 Watt 0 Votes
AirDoctor 3500i

Coway Airmega 400
vs
AirDoctor 3500i
Power Consumption

Power Consumption is 66 W for Airmega 400 and 85 W for AirDoctor 3500i, making Airmega 400 more energy efficient.

Average electrical power used during operation.

Frequency

What is the operating frequency?

60 Hz 0 Votes
Coway Airmega 400
60 Hz 0 Votes
AirDoctor 3500i

Coway Airmega 400
vs
AirDoctor 3500i
Frequency

Frequency is 60 Hz for both, matching standard power supply.

The electrical frequency of operation.

CADR Pollen

What is the CADR for pollen?

400 cfm 0 Votes
Coway Airmega 400
336 cfm 0 Votes
AirDoctor 3500i

Coway Airmega 400
vs
AirDoctor 3500i
CADR Pollen

CADR Pollen is 400 cfm for Airmega 400 and 336 cfm for AirDoctor 3500i, favoring Airmega 400 pollen filtration.

Pollen-specific clean air delivery rate.

Coverage Area

What is the coverage area?

1,560 sq ft 0 Votes
Coway Airmega 400
630 sq ft 0 Votes
AirDoctor 3500i

Coway Airmega 400
vs
AirDoctor 3500i
Coverage Area

Coverage Area matches recommended size at 1560 sq ft for Airmega 400 and 630 sq ft for AirDoctor 3500i, confirming room suitability.

The total maximum area the purifier can effectively clean.

Max Airflow

What is the maximum airflow rate?

Who knows? 0 Votes Coway Airmega 400 (Help us out by suggesting one!)

450 cfm 0 Votes
AirDoctor 3500i

Coway Airmega 400
vs
AirDoctor 3500i
Max Airflow

Max Airflow is unavailable for Airmega 400 and 450 cfm for AirDoctor 3500i, indicating AirDoctor's higher max airflow.

Maximum airflow capacity of the unit.

Clean Air Delivery Rate

What is the overall CADR?

416 cfm 0 Votes
Coway Airmega 400

Who knows? 0 Votes AirDoctor 3500i (Help us out by suggesting one!)

Coway Airmega 400
vs
AirDoctor 3500i
Clean Air Delivery Rate

Clean Air Delivery Rate is 416 cfm for Airmega 400 and unavailable for AirDoctor 3500i, making Airmega 400's CADR more certain.

Measures the total air cleaning rate in cubic feet per minute.

Noise Level Max

What is the maximum noise level?

55 dB 0 Votes
Coway Airmega 400
48 dB 0 Votes
AirDoctor 3500i

Coway Airmega 400
Coway Airmega 400

Officially verified max noise at 55 dB, which is quieter than a typical conversation. Ideal for quieter environments such as bedrooms. 

AirDoctor 3500i
AirDoctor 3500i

Slightly louder at maximum fan speed but still quieter than typical vacuum cleaners.

Maximum noise level at highest fan speed.

Voltage

What is the voltage requirement?

120 Volt 0 Votes
Coway Airmega 400
120 Volt 0 Votes
AirDoctor 3500i

Coway Airmega 400
Coway Airmega 400

Works with standard household outlets (North America).

AirDoctor 3500i
AirDoctor 3500i

Standard household voltage in North America, compatible with most outlets.

Electrical operating voltage required.

Air Changes Per Hour

How many air changes per hour?

2 ACH 0 Votes
Coway Airmega 400
4 ACH 1 Votes
AirDoctor 3500i

AirDoctor 3500i
AirDoctor 3500i

Refreshes the air in a 630 sq ft room four times per hour for consistent air quality.

Number of complete air changes per hour.

AirDoctor 3500i has double the air changes per hour, which is pretty important for keeping the air truly fresh and clean quickly.

See more

Noise Level Min

What is the minimum noise level?

22 dB 1 Votes
Coway Airmega 400
34 dB 0 Votes
AirDoctor 3500i

AirDoctor 3500i
AirDoctor 3500i

Quiet operation at its lowest setting, quieter than the hum of a refrigerator.

Minimum operating noise level at lowest fan speed.

The low noise level on the Coway is a huge plus for me, I really don't want a loud air purifier running all the time.

See more

CADR Smoke

What is the CADR for smoke?

328 cfm 0 Votes
Coway Airmega 400
340 cfm 0 Votes
AirDoctor 3500i

AirDoctor 3500i
AirDoctor 3500i

Cleans the air at a rate of about 577.5 m³/h, making it efficient for smoke-heavy environments.

Smoke-specific clean air delivery rate.

CADR Dust

What is the CADR for dust?

328 cfm 0 Votes
Coway Airmega 400
336 cfm 0 Votes
AirDoctor 3500i

AirDoctor 3500i
AirDoctor 3500i

About 570 m³/h for effective dust removal in large areas.

Dust-specific clean air delivery rate.

Filtration System 18

Primary Filter Type

What is the primary filter type?

67 Coway Airmega 400 0 Votes HEPA

84 AirDoctor 3500i 0 Votes UltraHEPA

Coway Airmega 400
vs
AirDoctor 3500i
Primary Filter Type

Primary Filter Type differs: HEPA in Airmega 400 versus UltraHEPA in AirDoctor 3500i, with AirDoctor having a more advanced filter.

The main type of filter used to trap fine particles.

Filter Efficiency Percentage

What is the filter efficiency percentage?

99.97 % 0 Votes
Coway Airmega 400
99.99 % 0 Votes
AirDoctor 3500i

Coway Airmega 400
vs
AirDoctor 3500i
Filter Efficiency Percentage

Filter Efficiency Percentage is 99.97% for Airmega 400 and slightly higher at 99.99% for AirDoctor 3500i, showing marginally better filtration.

Percentage of particles the filter can capture.

Filter Life Duration

What is the filter life duration?

12 month 0 Votes
Coway Airmega 400
12 month 0 Votes
AirDoctor 3500i

Coway Airmega 400
vs
AirDoctor 3500i
Filter Life Duration

Filter Life Duration is 12 months for both Airmega 400 and AirDoctor 3500i, requiring yearly replacement.

Expected lifespan of the filter before replacement.

Antibacterial Coating

Does it have antibacterial coating?

No 0 Votes Coway Airmega 400

No 0 Votes AirDoctor 3500i

Coway Airmega 400
vs
AirDoctor 3500i
Antibacterial Coating

Antibacterial Coating is No in both Airmega 400 and AirDoctor 3500i.

Indicates if the filter surface has antibacterial treatment.

UVC Light

Does it include UVC light?

No 0 Votes Coway Airmega 400

No 0 Votes AirDoctor 3500i

Coway Airmega 400
vs
AirDoctor 3500i
UVC Light

UVC Light is No in both models, indicating no UV sterilization.

Uses ultraviolet-C light to sterilize bacteria and viruses.

Pre Filter Type

What is the pre-filter type?

47 Coway Airmega 400 0 Votes Mesh

44 AirDoctor 3500i 0 Votes Foam

Coway Airmega 400
Coway Airmega 400

The mesh pre-filter captures larger particles like pet hair, extending the life of the HEPA filter.

AirDoctor 3500i
AirDoctor 3500i

Foam pre-filter captures large particles like dust, extending the life of the main filter.

The type of pre-filter that captures larger dust and hair.

HEPA Filter Grade

What is the HEPA filter grade?

67 Coway Airmega 400 0 Votes H13

69 AirDoctor 3500i 0 Votes H13

Coway Airmega 400
Coway Airmega 400

H13 HEPA filter captures 99.97% of ultra-fine particles, including viruses, bacteria, and pollen.

AirDoctor 3500i
AirDoctor 3500i

High-efficiency filter capable of trapping particles as small as 0.3 microns with 99.99% efficiency.

Indicates HEPA filter class and particle capture efficiency.

Carbon Filter Type

What is the carbon filter type?

77 Coway Airmega 400 0 Votes Activated Carbon

79 AirDoctor 3500i 0 Votes Activated Carbon

Coway Airmega 400
Coway Airmega 400

Activated Carbon filters are excellent for removing odors, such as smoke and pet smells.

AirDoctor 3500i
AirDoctor 3500i

Absorbs odors and harmful chemicals, improving indoor air quality.

Type of carbon material used for odor and gas removal.

Number Of Filter Stages

How many filter stages are there?

37 Coway Airmega 400 0 Votes 3

59 AirDoctor 3500i 1 Votes 4

AirDoctor 3500i
AirDoctor 3500i

Includes a pre-filter, UltraHEPA filter, activated carbon filter, and a VOC filter for thorough purification.

Total number of filtration stages used in the air cleaning process.

The AirDoctor 3500i having 4 filter stages sounds more robust and effective for purifying the air thoroughly, which is what I need.

See more

Filter Washable

Are the filters washable?

Yes 1 Votes Coway Airmega 400

No 0 Votes AirDoctor 3500i

Coway Airmega 400
Coway Airmega 400

The pre-filter is washable, making maintenance easy. Washable filters increase longevity and performance.

Indicates whether filters can be washed and reused.

Washable filters on the Coway Airmega 400 are a game-changer for reducing long-term costs and maintenance hassle, I'd definitely prefer that.

See more

Activated Carbon Amount

How much activated carbon does it have?

Who knows? 0 Votes Coway Airmega 400 (Help us out by suggesting one!)

4 oz 0 Votes
AirDoctor 3500i

AirDoctor 3500i
AirDoctor 3500i

About 113 grams of activated carbon, providing strong odor elimination.

Total amount of activated carbon used in the filter.

Filter Material Composition

What materials are used in the filter?

34 Coway Airmega 400 0 Votes Fiberglass, Plastic, Nylon

47 AirDoctor 3500i 0 Votes Foam, Activated Carbon, Fiberglass

AirDoctor 3500i
AirDoctor 3500i

Combines foam for large particles, activated carbon for odors, and fiberglass for fine dust.

Materials used in constructing the filter media.

Air Quality & Sensors 15

Air Quality Sensor

Does it have an air quality sensor?

Yes 0 Votes Coway Airmega 400

Yes 0 Votes AirDoctor 3500i

Coway Airmega 400
vs
AirDoctor 3500i
Air Quality Sensor

Air Quality Sensor is available on both Airmega 400 and AirDoctor 3500i, supporting air monitoring.

Detects overall air quality and pollution level.

Odor Sensor

Does it have an odor sensor?

Yes 0 Votes Coway Airmega 400

Yes 0 Votes AirDoctor 3500i

Coway Airmega 400
vs
AirDoctor 3500i
Odor Sensor

Odor Sensor is Yes for both Coway Airmega 400 and AirDoctor 3500i, aiding in smell detection.

Detects unpleasant smells or chemical odors.

Auto Dimming Display

Does it have an auto dimming display?

No 0 Votes Coway Airmega 400

Yes 0 Votes AirDoctor 3500i

Coway Airmega 400
vs
AirDoctor 3500i
Auto Dimming Display

Auto Dimming Display is No for Airmega 400 and Yes for AirDoctor 3500i, enhancing display convenience in AirDoctor.

Adjusts screen brightness automatically based on lighting.

Automatic Mode

Does it have an automatic mode?

Yes 0 Votes Coway Airmega 400

Yes 0 Votes AirDoctor 3500i

Coway Airmega 400
vs
AirDoctor 3500i
Automatic Mode

Automatic Mode is available on both devices, supporting automatic operation.

Adjusts purification level automatically based on air quality.

Dust Sensor

Does it include a dust sensor?

Yes 0 Votes Coway Airmega 400

Yes 0 Votes AirDoctor 3500i

Coway Airmega 400
Coway Airmega 400

Dust Sensor detects dust particles and adjusts airflow for optimal performance.

Detects airborne dust particles to optimize performance.

VOC Sensor

Does it have a VOC sensor?

Yes 0 Votes Coway Airmega 400

Yes 0 Votes AirDoctor 3500i

Coway Airmega 400
Coway Airmega 400

The VOC sensor removes volatile organic compounds (VOCs) found in cleaning supplies, paints, etc.

Detects volatile organic compounds and harmful gases.

Auto Fan Speed Adjustment

Does it support auto fan speed adjustment?

Yes 0 Votes Coway Airmega 400

Yes 0 Votes AirDoctor 3500i

Automatically changes fan speed based on sensor data.

CO2 Sensor

Does it include a CO2 sensor?

No 0 Votes Coway Airmega 400

No 0 Votes AirDoctor 3500i

Monitors carbon dioxide levels in the air.

PM25 Sensor

Does it include a PM2.5 sensor?

Yes 0 Votes Coway Airmega 400

Yes 0 Votes AirDoctor 3500i

Detects PM2.5 fine particles (2.5 microns and smaller).

PM10 Sensor

Does it have a PM10 sensor?

Yes 0 Votes Coway Airmega 400

Yes 0 Votes AirDoctor 3500i

Detects coarse dust particles (10 microns and larger).

Temperature Sensor

Does it have a temperature sensor?

No 0 Votes Coway Airmega 400

No 0 Votes AirDoctor 3500i

Measures ambient temperature for comfort optimization.

Humidity Sensor

Does it include a humidity sensor?

No 0 Votes Coway Airmega 400

No 0 Votes AirDoctor 3500i

Detects humidity level in the environment.

Controls & Interface 13

Remote Control

Does it come with a remote control?

No 0 Votes Coway Airmega 400

No 0 Votes AirDoctor 3500i

Coway Airmega 400
vs
AirDoctor 3500i
Remote Control

Remote Control is No in both, limiting remote operation.

Allows operation from a distance using a remote device.

Child Lock

Does it include a child lock?

No 0 Votes Coway Airmega 400

Yes 0 Votes AirDoctor 3500i

Coway Airmega 400
vs
AirDoctor 3500i
Child Lock

Child Lock is No for Airmega 400 but Yes for AirDoctor 3500i, improving safety for families.

Prevents accidental operation by children.

Timer Function

Does it have a timer function?

Yes 0 Votes Coway Airmega 400

Yes 0 Votes AirDoctor 3500i

Coway Airmega 400
Coway Airmega 400

Set the purifier to run for 1, 4, or 8 hours, perfect for scheduled operation when you're away or sleeping.

Lets users set specific operating durations.

Sleep Mode

Does it feature a sleep mode?

Yes 0 Votes Coway Airmega 400

Yes 0 Votes AirDoctor 3500i

Coway Airmega 400
Coway Airmega 400

Sleep Mode reduces fan speed and light, making it ideal for nighttime use without disturbing rest.

Operates quietly with dimmed display for sleeping.

Mobile App Control

Can it be controlled through a mobile app?

No 0 Votes Coway Airmega 400

Yes 1 Votes AirDoctor 3500i

Enables control via smartphone application.

Having mobile app control is super convenient, AirDoctor 3500i wins here hands down for smart home integration.

See more

Touch Controls

Does it have touch controls?

Yes 0 Votes Coway Airmega 400

Yes 0 Votes AirDoctor 3500i

Allows operation via touch-sensitive interface.

Touch Sensitivity Level

What is the touch sensitivity level?

Who knows? 0 Votes Coway Airmega 400 (Help us out by suggesting one!)

3 0 Votes
AirDoctor 3500i

Indicates how responsive the touch interface is.

Physical Buttons

Does it include physical buttons?

Yes 0 Votes Coway Airmega 400

Yes 0 Votes AirDoctor 3500i

Provides tactile buttons for basic operation.

Display Brightness Adjustment

Can the display brightness be adjusted?

No 0 Votes Coway Airmega 400

Yes 0 Votes AirDoctor 3500i

Allows users to adjust the display brightness manually.

Control Panel Location

Where is the control panel located?

87 Coway Airmega 400 0 Votes Top

89 AirDoctor 3500i 0 Votes Top

Indicates where the main control panel is located.

Filter Reset Button

Does it have a filter reset button?

Yes 0 Votes Coway Airmega 400

Yes 0 Votes AirDoctor 3500i

Dedicated button to reset the filter indicator after replacement.

WiFi Indicator Light

Does it have a WiFi indicator light?

Yes 0 Votes Coway Airmega 400

Yes 0 Votes AirDoctor 3500i

Shows WiFi connectivity status visually.

Fan & Operation Modes 10

Fan Speed Levels

What fan speed levels are available?

0 Coway Airmega 400 0 Votes Low, Medium, High

0 AirDoctor 3500i 0 Votes Low, Medium, High, Boost

Coway Airmega 400
vs
AirDoctor 3500i
Fan Speed Levels

Fan Speed Levels for Airmega 400 are Low, Medium, High; AirDoctor 3500i adds Boost level for more control.

Lists the available fan speed levels or names.

Minimum Fan Speed

What is the minimum fan speed?

Who knows? 0 Votes Coway Airmega 400 (Help us out by suggesting one!)

250 rpm 0 Votes
AirDoctor 3500i

Coway Airmega 400
vs
AirDoctor 3500i
Minimum Fan Speed

Minimum Fan Speed is unavailable for Airmega 400 and 250 rpm for AirDoctor 3500i, showing defined minimum speed in AirDoctor.

Lowest rotation speed for quiet or energy-saving mode.

Manual Mode

Does it include manual mode?

Yes 0 Votes Coway Airmega 400

Yes 0 Votes AirDoctor 3500i

Coway Airmega 400
vs
AirDoctor 3500i
Manual Mode

Manual Mode is Yes for both devices, allowing custom user control.

Allows manual fan speed and mode selection by the user.

Eco Mode

Does it have an eco mode?

Yes 0 Votes Coway Airmega 400

Yes 0 Votes AirDoctor 3500i

Coway Airmega 400
Coway Airmega 400

Eco Mode automatically turns off the fan after 10 minutes of clean air, conserving energy.

Energy-saving mode that reduces power usage.

Maximum Fan Speed

What is the maximum fan speed?

Who knows? 0 Votes Coway Airmega 400 (Help us out by suggesting one!)

650 rpm 0 Votes
AirDoctor 3500i

Maximum fan rotation speed when operating at full power.

Turbo Mode

Does it include a turbo mode?

No 0 Votes Coway Airmega 400

Yes 0 Votes AirDoctor 3500i

High-power mode for rapid air purification.

Sleep Quiet Mode

Does it feature a sleep or quiet mode?

Yes 0 Votes Coway Airmega 400

Yes 0 Votes AirDoctor 3500i

Minimizes noise and display brightness for nighttime use.

Custom Mode

Does it support a custom mode?

No 0 Votes Coway Airmega 400

Yes 0 Votes AirDoctor 3500i

Lets users set personalized mode settings or schedules.

Oscillation

Does it feature oscillation?

No 0 Votes Coway Airmega 400

Yes 0 Votes AirDoctor 3500i

Rotates or swings to distribute air evenly across a room.

Airflow Direction Control

Can you control the airflow direction?

No 0 Votes Coway Airmega 400

Yes 0 Votes AirDoctor 3500i

Allows users to adjust the direction of purified airflow.

Safety & Protection 9

Power Failure Memory

Does it have power failure memory?

No 0 Votes Coway Airmega 400

Yes 0 Votes AirDoctor 3500i

Coway Airmega 400
vs
AirDoctor 3500i
Power Failure Memory

Power Failure Memory is No for Airmega 400 and Yes for AirDoctor 3500i, preserving settings after power loss.

Remembers last settings after a power outage.

Power Surge Protection

Does it include power surge protection?

No 0 Votes Coway Airmega 400

Yes 0 Votes AirDoctor 3500i

Coway Airmega 400
vs
AirDoctor 3500i
Power Surge Protection

Power Surge Protection is No for Airmega 400 and Yes for AirDoctor 3500i, protecting the device from surges.

Protects internal components from voltage spikes.

UV Safety Shield

Does it include a UV safety shield?

No 0 Votes Coway Airmega 400

Yes 0 Votes AirDoctor 3500i

Coway Airmega 400
vs
AirDoctor 3500i
UV Safety Shield

UV Safety Shield is No for Airmega 400 and Yes for AirDoctor 3500i, adding UV safety for users.

Shields users from direct UV light exposure in UV-enabled models.

Ozone Emission Safe

Is it ozone emission safe?

No 0 Votes Coway Airmega 400

Yes 0 Votes AirDoctor 3500i

Coway Airmega 400
vs
AirDoctor 3500i
Ozone Emission Safe

Ozone Emission Safe is No for Airmega 400 and Yes for AirDoctor 3500i, indicating safer ozone emission on AirDoctor.

Ensures ozone emissions remain within safe levels.

Electrical Protection Rating

What is the electrical protection rating?

Who knows? 0 Votes Coway Airmega 400 (Help us out by suggesting one!)

0 AirDoctor 3500i 0 Votes IP20

Coway Airmega 400
vs
AirDoctor 3500i
Electrical Protection Rating

Electrical Protection Rating is unavailable for Airmega 400 but IP20 for AirDoctor 3500i, reflecting protection level.

Indicates protection level against dust or electrical contact.

Safety Auto Shutoff

Does it feature safety auto shutoff?

No 0 Votes Coway Airmega 400

Yes 0 Votes AirDoctor 3500i

Coway Airmega 400
Coway Airmega 400

No auto shutoff is specified, but the purifier automatically turns off when set on timer.

Automatically turns off under unsafe or fault conditions.

Overheat Protection

Does it have overheat protection?

No 0 Votes Coway Airmega 400

Yes 0 Votes AirDoctor 3500i

Prevents damage by automatically shutting down when overheating.

Tipover Protection

Does it include tipover protection?

No 0 Votes Coway Airmega 400

Yes 0 Votes AirDoctor 3500i

Shuts off the device automatically if it tips over.

Fuse Type

What type of fuse does it use?

Who knows? 0 Votes Coway Airmega 400 (Help us out by suggesting one!)

0 AirDoctor 3500i 0 Votes Thermal Fuse

Identifies the type of fuse used for electrical safety.

Build & Materials 7

Body Material

What material is the purifier body made of?

0 Coway Airmega 400 0 Votes ABS Plastic

0 AirDoctor 3500i 0 Votes ABS Plastic

Coway Airmega 400
vs
AirDoctor 3500i
Body Material

Body Material is ABS Plastic for both Airmega 400 and AirDoctor 3500i, ensuring similar build material.

Describes the main material used for the purifier body.

Filter Frame Material

What is the filter frame material?

0 Coway Airmega 400 0 Votes Plastic

0 AirDoctor 3500i 0 Votes Plastic

Coway Airmega 400
vs
AirDoctor 3500i
Filter Frame Material

Filter Frame Material is Plastic in both devices.

Indicates the material used for the filter housing or frame.

Scratch Resistance

Is the purifier scratch resistant?

No 0 Votes Coway Airmega 400

Yes 0 Votes AirDoctor 3500i

Coway Airmega 400
vs
AirDoctor 3500i
Scratch Resistance

Scratch Resistance is No for Airmega 400 and Yes for AirDoctor 3500i, making AirDoctor more durable.

Indicates resistance of the body surface to scratches.

Portability Handles Wheels

Does it have handles or wheels for portability?

Yes 1 Votes Coway Airmega 400

No 0 Votes AirDoctor 3500i

Indicates presence of handles or wheels for easier movement.

Portability with handles and wheels on the Coway Airmega 400 is actually pretty useful for moving it between rooms easily.

See more

Build Type

What is the build type?

0 Coway Airmega 400 0 Votes Fixed

0 AirDoctor 3500i 0 Votes Fixed

Defines the overall design structure of the purifier.

Finish Texture

What type of finish texture does it have?

0 Coway Airmega 400 0 Votes Matte

0 AirDoctor 3500i 0 Votes Matte

Describes the surface finish of the air purifier.

Build Quality Grade

What is the build quality grade?

0 Coway Airmega 400 0 Votes Standard

0 AirDoctor 3500i 0 Votes Premium

Indicates the overall craftsmanship and material precision.

Maintenance & Usability 8

Tool Free Maintenance

Is maintenance tool free?

No 0 Votes Coway Airmega 400

Yes 0 Votes AirDoctor 3500i

Coway Airmega 400
vs
AirDoctor 3500i
Tool Free Maintenance

Tool Free Maintenance is No for Airmega 400 and Yes for AirDoctor 3500i, enabling simpler maintenance for AirDoctor.

Allows maintenance without using additional tools.

Filter Replacement Method

What is the filter replacement method?

0 Coway Airmega 400 0 Votes Slide Out

0 AirDoctor 3500i 0 Votes Slide Out

Describes how the filter can be removed and replaced.

Ease Of Access

How is the ease of access for cleaning or filter changes?

0 Coway Airmega 400 0 Votes Front Access

0 AirDoctor 3500i 0 Votes Front Access

Indicates how easily users can reach filters and components.

Cleaning Frequency

How often should it be cleaned?

30 days 0 Votes
Coway Airmega 400
30 days 0 Votes
AirDoctor 3500i

Recommended frequency of cleaning for optimal performance.

Cleaning Tools

Are cleaning tools included?

No 0 Votes Coway Airmega 400

Yes 0 Votes AirDoctor 3500i

Specifies if cleaning accessories are provided with the unit.

Maintenance Indicator

Does it have a maintenance indicator?

Yes 0 Votes Coway Airmega 400

Yes 0 Votes AirDoctor 3500i

Alerts when maintenance or cleaning is needed.

Maintenance Frequency Reminder

Does it include a maintenance frequency reminder?

No 0 Votes Coway Airmega 400

Yes 0 Votes AirDoctor 3500i

Provides reminders for regular filter replacement or cleaning.

Filter Replacement Cost Estimate

What is the estimated filter replacement cost?

Who knows? 0 Votes Coway Airmega 400 (Help us out by suggesting one!)

0 AirDoctor 3500i 0 Votes $80

Approximate cost for standard replacement filters.

Smart & Connectivity Features 12

Remote Start Stop

Can it be started or stopped remotely?

No 0 Votes Coway Airmega 400

No 0 Votes AirDoctor 3500i

Coway Airmega 400
vs
AirDoctor 3500i
Remote Start Stop

Remote Start Stop is No for both models.

Enables turning the purifier on or off remotely via app or voice.

WiFi Connectivity

Does it have WiFi connectivity?

No 0 Votes Coway Airmega 400

Yes 0 Votes AirDoctor 3500i

Indicates if the air purifier can connect to WiFi for app or remote control.

Bluetooth Connectivity

Does it have Bluetooth connectivity?

No 0 Votes Coway Airmega 400

No 0 Votes AirDoctor 3500i

Allows wireless connection via Bluetooth for setup or local control.

Cloud Connectivity

Does it support cloud connectivity?

No 0 Votes Coway Airmega 400

No 0 Votes AirDoctor 3500i

Connects to cloud services for remote access and data sync.

Offline Mode

Does it have an offline mode?

No 0 Votes Coway Airmega 400

No 0 Votes AirDoctor 3500i

Operates fully even without an internet connection.

App Integration

Does it integrate with mobile apps?

No 0 Votes Coway Airmega 400

Yes 0 Votes AirDoctor 3500i

Integrates with manufacturer or third-party mobile applications.

Voice Assistant Compatibility

Which voice assistants is it compatible with?

0 Coway Airmega 400 0 Votes None

0 AirDoctor 3500i 0 Votes Alexa, Google Assistant, Siri

Specifies which voice assistants are supported.

IFTTT Or Smart Home Integration

Does it support IFTTT or smart home integration?

No 0 Votes Coway Airmega 400

No 0 Votes AirDoctor 3500i

Integrates with automation platforms like IFTTT or smart home hubs.

Firmware Update Capability

Can it update firmware automatically?

No 0 Votes Coway Airmega 400

Yes 0 Votes AirDoctor 3500i

Allows over-the-air firmware updates for new features or bug fixes.

Multi-Device Sync

Does it support multi-device sync?

No 0 Votes Coway Airmega 400

Yes 0 Votes AirDoctor 3500i

Synchronizes multiple purifiers or devices under one control.

Data Logging

Does it support data logging?

No 0 Votes Coway Airmega 400

Yes 0 Votes AirDoctor 3500i

Logs air quality, usage, and performance data for analysis.

Usage History

Does it keep usage history?

No 0 Votes Coway Airmega 400

Yes 0 Votes AirDoctor 3500i

Records previous usage patterns and air quality stats.

Environmental & Sustainability 7

Sustainable Packaging

Is the packaging sustainable?

No 0 Votes Coway Airmega 400

Yes 0 Votes AirDoctor 3500i

Coway Airmega 400
vs
AirDoctor 3500i
Sustainable Packaging

Sustainable Packaging is No for Airmega 400 but Yes for AirDoctor 3500i, making AirDoctor more eco-friendly.

Describes if the packaging uses recyclable or biodegradable materials.

Low Ozone Emission

Does it have low ozone emission?

No 0 Votes Coway Airmega 400

Yes 0 Votes AirDoctor 3500i

Coway Airmega 400
vs
AirDoctor 3500i
Low Ozone Emission

Low Ozone Emission is No on Airmega 400 and Yes on AirDoctor 3500i, ensuring safer emissions for AirDoctor.

Ensures minimal ozone emission during operation.

Noise Eco Mode

What is the noise level in eco mode?

Who knows? 0 Votes Coway Airmega 400 (Help us out by suggesting one!)

30 dB 0 Votes
AirDoctor 3500i

Coway Airmega 400
vs
AirDoctor 3500i
Noise Eco Mode

Noise Eco Mode is unavailable for Airmega 400 and 30 dB for AirDoctor 3500i, specifying noise under eco conditions for AirDoctor.

Noise level during eco or low power mode.

Eco Friendly Materials

Are eco-friendly materials used?

No 0 Votes Coway Airmega 400

Yes 0 Votes AirDoctor 3500i

Indicates whether the product uses eco-friendly materials.

Recyclable Filters

Are the filters recyclable?

No 0 Votes Coway Airmega 400

Yes 0 Votes AirDoctor 3500i

Indicates if filters are recyclable after use.

Carbon Footprint Rating

What is its carbon footprint rating?

Who knows? 0 Votes Coway Airmega 400 (Help us out by suggesting one!)

120 kgCO2e 0 Votes
AirDoctor 3500i

Approximate carbon footprint of the device’s lifecycle.

Standby Power Usage

How much power does it use on standby?

Who knows? 0 Votes Coway Airmega 400 (Help us out by suggesting one!)

0.25 W 0 Votes
AirDoctor 3500i

Power consumption when the device is on standby mode.

Accessories & Package Contents 8

Power Cord

Is the power cord included?

Yes 0 Votes Coway Airmega 400

Yes 0 Votes AirDoctor 3500i

Coway Airmega 400
vs
AirDoctor 3500i
Power Cord

Power Cord is included with both units.

States whether a power cord is included in the box.

Setup Guide

Is there a setup guide included?

Yes 0 Votes Coway Airmega 400

Yes 0 Votes AirDoctor 3500i

Coway Airmega 400
vs
AirDoctor 3500i
Setup Guide

Setup Guide is included with both models.

Confirms if a setup or quick start guide is provided.

User Manual

Is a user manual included?

Yes 0 Votes Coway Airmega 400

Yes 0 Votes AirDoctor 3500i

Coway Airmega 400
vs
AirDoctor 3500i
User Manual

User Manual is supplied for both products.

Confirms the presence of a printed or digital user manual.

Warranty Card

Is a warranty card included?

Yes 0 Votes Coway Airmega 400

Yes 0 Votes AirDoctor 3500i

Coway Airmega 400
vs
AirDoctor 3500i
Warranty Card

Warranty Card is included with both Coway Airmega 400 and AirDoctor 3500i.

Indicates the inclusion of a warranty registration card.

Filters

Are filters included in the box?

Yes 0 Votes Coway Airmega 400

Yes 0 Votes AirDoctor 3500i

Coway Airmega 400
Coway Airmega 400

Filters included: the purifier comes with pre-filters and a HEPA + Activated Carbon filter for comprehensive air purification.

Specifies if the product includes initial filters in the box.

Spare Filters

Are spare filters included?

Yes 0 Votes Coway Airmega 400

Yes 0 Votes AirDoctor 3500i

Coway Airmega 400
Coway Airmega 400

Spare filters available for long-term use, available directly from Coway.

Indicates whether additional spare filters are provided.

Power Adapter

Is a power adapter included?

No 0 Votes Coway Airmega 400

Yes 0 Votes AirDoctor 3500i

Specifies if an external power adapter is provided.

Filter Replacement Tool

Is a filter replacement tool included?

No 0 Votes Coway Airmega 400

Yes 0 Votes AirDoctor 3500i

Indicates whether a tool for filter replacement is provided.

Certification & Standards 11

UL Listed

Is it UL listed?

Yes 0 Votes Coway Airmega 400

Yes 0 Votes AirDoctor 3500i

Coway Airmega 400
vs
AirDoctor 3500i
UL Listed

UL Listed is Yes for both Coway Airmega 400 and AirDoctor 3500i.

Indicates UL certification for electrical and fire safety.

CSA Certified

Is it CSA certified?

No 0 Votes Coway Airmega 400

Yes 0 Votes AirDoctor 3500i

Coway Airmega 400
vs
AirDoctor 3500i
CSA Certified

CSA Certified is No for Airmega 400 and Yes for AirDoctor 3500i, showing more extensive certification for AirDoctor.

Certifies compliance with Canadian Standards Association safety requirements.

ISO Certified

Is it ISO certified?

No 0 Votes Coway Airmega 400

Yes 0 Votes AirDoctor 3500i

Coway Airmega 400
vs
AirDoctor 3500i
ISO Certified

ISO Certified is No for Airmega 400 and Yes for AirDoctor 3500i, indicating higher quality management certification.

Indicates certification under ISO standards for quality or environmental management.

Energy Star Certified

Is it Energy Star certified?

Yes 0 Votes Coway Airmega 400

Yes 0 Votes AirDoctor 3500i

Coway Airmega 400
Coway Airmega 400

Energy Star Certified: Efficient energy use, saving on electricity costs.

Indicates certification for energy-efficient performance.

EPA Certified

Is it EPA certified?

Yes 0 Votes Coway Airmega 400

Yes 0 Votes AirDoctor 3500i

Coway Airmega 400
Coway Airmega 400

EPA Certified: Ensures the air purifier meets rigorous environmental standards.

Verifies compliance with U.S. Environmental Protection Agency standards.

AHAM Verified

Is it AHAM verified?

No 0 Votes Coway Airmega 400

Yes 0 Votes AirDoctor 3500i

Indicates if the air purifier is verified by the Association of Home Appliance Manufacturers.

CARB Certified

Is it CARB certified?

Yes 0 Votes Coway Airmega 400

Yes 0 Votes AirDoctor 3500i

Confirms compliance with California Air Resources Board standards for ozone emission safety.

ETL Listed

Is it ETL listed?

Yes 0 Votes Coway Airmega 400

Yes 0 Votes AirDoctor 3500i

Shows compliance with North American electrical safety standards.

RoHS Compliant

Is it RoHS compliant?

Yes 0 Votes Coway Airmega 400

Yes 0 Votes AirDoctor 3500i

Ensures restriction of hazardous substances in components and materials.

FCC Certified

Is it FCC certified?

Yes 0 Votes Coway Airmega 400

Yes 0 Votes AirDoctor 3500i

Indicates compliance with Federal Communications Commission standards for electronic emissions.

CE Certified

Is it CE certified?

No 0 Votes Coway Airmega 400

Yes 0 Votes AirDoctor 3500i

Confirms compliance with European safety, health, and environmental protection standards.

Warranty & Support 9

Service Center Availability

What is the service center coverage?

0 Coway Airmega 400 0 Votes Nationwide

0 AirDoctor 3500i 0 Votes Local

Coway Airmega 400
vs
AirDoctor 3500i
Service Center Availability

Service Center Availability is Nationwide for Airmega 400 and Local for AirDoctor 3500i, indicating wider support for Airmega.

Describes the scope of service center availability.

Onsite Service Availability

Is onsite service available?

Yes 0 Votes Coway Airmega 400

Yes 0 Votes AirDoctor 3500i

Coway Airmega 400
vs
AirDoctor 3500i
Onsite Service Availability

Onsite Service Availability is Yes for both products.

States whether technicians can provide onsite service or repair.

Warranty Duration

What is the warranty duration?

0 Coway Airmega 400 1 Votes 5 years

0 AirDoctor 3500i 0 Votes 1 year

Coway Airmega 400
Coway Airmega 400

5-year warranty gives peace of mind, covering parts and motor.

Specifies how long the product is covered under warranty.

A five-year warranty on the Coway Airmega 400 gives me so much more peace of mind compared to just one year on the AirDoctor.

See more

Warranty Service Type

What type of warranty service is included?

0 Coway Airmega 400 0 Votes On Site

0 AirDoctor 3500i 0 Votes Replacement

Coway Airmega 400
Coway Airmega 400

On-site warranty ensures that repairs are carried out at your location if necessary.

Defines how warranty service is provided.

Extended Warranty Availability

Is extended warranty available?

No 0 Votes Coway Airmega 400

Yes 0 Votes AirDoctor 3500i

Indicates whether extended warranty options are offered.

Customer Support Channel

What are the customer support channels?

0 Coway Airmega 400 0 Votes Phone, Email, Live Chat, Website

0 AirDoctor 3500i 0 Votes Phone, Email, Live Chat, App

Lists available communication channels for customer support.

Online Support Platform

What online support platform is available?

0 Coway Airmega 400 0 Votes Website

0 AirDoctor 3500i 0 Votes Website

Specifies the platform used for online support or warranty registration.

Response Time

What is the typical customer support response time?

24 hours 0 Votes
Coway Airmega 400
24 hours 0 Votes
AirDoctor 3500i

Average time for customer support to respond.

Return Policy

What is the return policy duration?

0 Coway Airmega 400 0 Votes 30 Days

0 AirDoctor 3500i 0 Votes 30 Days

Defines the allowable time period for product returns.

Surveys

Because hot takes deserve votes.

Air Cleaning Performance

How effective is this air purifier at cleaning the air in a typical room?

Excellent purification — Removes over 99% of particles
0 Votes
Coway Airmega 400
0 Votes
AirDoctor 3500i
Very good — Removes 95% to 99% of particles
0 Votes
Coway Airmega 400
0 Votes
AirDoctor 3500i
Decent — Removes 85% to 95% of particles
0 Votes
Coway Airmega 400
0 Votes
AirDoctor 3500i
Weak — Removes 70% to 85% of particles
0 Votes
Coway Airmega 400
0 Votes
AirDoctor 3500i
Poor — Removes under 70% of particles
0 Votes
Coway Airmega 400
0 Votes
AirDoctor 3500i

Air Circulation Speed

How quickly does this air purifier clean the air in a medium-sized room?

Very fast — Under 10 minutes
0 Votes
Coway Airmega 400
0 Votes
AirDoctor 3500i
Fast — 10 to 20 minutes
0 Votes
Coway Airmega 400
0 Votes
AirDoctor 3500i
Moderate — 20 to 30 minutes
0 Votes
Coway Airmega 400
0 Votes
AirDoctor 3500i
Slow — 30 to 45 minutes
0 Votes
Coway Airmega 400
0 Votes
AirDoctor 3500i
Very slow — Over 45 minutes
0 Votes
Coway Airmega 400
0 Votes
AirDoctor 3500i

Noise Level

How quiet is this air purifier during normal operation?

Very quiet — Under 25 dB
0 Votes
Coway Airmega 400
0 Votes
AirDoctor 3500i
Quiet — 25 to 35 dB
0 Votes
Coway Airmega 400
0 Votes
AirDoctor 3500i
Moderate — 35 to 45 dB
0 Votes
Coway Airmega 400
0 Votes
AirDoctor 3500i
Loud — 45 to 55 dB
0 Votes
Coway Airmega 400
0 Votes
AirDoctor 3500i
Very loud — Over 55 dB
0 Votes
Coway Airmega 400
0 Votes
AirDoctor 3500i

Ease of Setup

How easy was it to set up this air purifier for first-time use?

Extremely easy — Ready to use within minutes
0 Votes
Coway Airmega 400
0 Votes
AirDoctor 3500i
Easy — A few steps but clear instructions
0 Votes
Coway Airmega 400
0 Votes
AirDoctor 3500i
Average — Needed some effort but manageable
0 Votes
Coway Airmega 400
0 Votes
AirDoctor 3500i
Tricky — Confusing or unclear setup steps
0 Votes
Coway Airmega 400
0 Votes
AirDoctor 3500i
Frustrating — Difficult and time-consuming setup
0 Votes
Coway Airmega 400
0 Votes
AirDoctor 3500i

Filter Replacement Convenience

How easy is it to replace the filter on this air purifier?

Very simple — Quick and tool-free
0 Votes
Coway Airmega 400
0 Votes
AirDoctor 3500i
Easy — Takes only a few minutes
0 Votes
Coway Airmega 400
0 Votes
AirDoctor 3500i
Average — Manageable but a bit fiddly
0 Votes
Coway Airmega 400
0 Votes
AirDoctor 3500i
Hard — Requires tools or careful handling
0 Votes
Coway Airmega 400
0 Votes
AirDoctor 3500i
Very hard — Complicated or frustrating process
0 Votes
Coway Airmega 400
0 Votes
AirDoctor 3500i

Filter Lifespan

How long does the filter in this air purifier typically last?

Very long — Over 12 months
0 Votes
Coway Airmega 400
0 Votes
AirDoctor 3500i
Long — 9 to 12 months
0 Votes
Coway Airmega 400
0 Votes
AirDoctor 3500i
Average — 6 to 9 months
0 Votes
Coway Airmega 400
0 Votes
AirDoctor 3500i
Short — 3 to 6 months
0 Votes
Coway Airmega 400
0 Votes
AirDoctor 3500i
Very short — Under 3 months
0 Votes
Coway Airmega 400
0 Votes
AirDoctor 3500i

Energy Consumption

How energy-efficient is this air purifier during daily use?

Very efficient — Under 30 watts
0 Votes
Coway Airmega 400
0 Votes
AirDoctor 3500i
Efficient — 30 to 50 watts
0 Votes
Coway Airmega 400
0 Votes
AirDoctor 3500i
Moderate — 50 to 80 watts
0 Votes
Coway Airmega 400
0 Votes
AirDoctor 3500i
High — 80 to 120 watts
0 Votes
Coway Airmega 400
0 Votes
AirDoctor 3500i
Very high — Over 120 watts
0 Votes
Coway Airmega 400
0 Votes
AirDoctor 3500i

Design Appeal

How would you rate the design and appearance of this air purifier?

Sleek and stylish — Looks modern and fits any room
0 Votes
Coway Airmega 400
0 Votes
AirDoctor 3500i
Clean and simple — Looks nice and unobtrusive
0 Votes
Coway Airmega 400
0 Votes
AirDoctor 3500i
Average — Functional but plain
0 Votes
Coway Airmega 400
0 Votes
AirDoctor 3500i
Bulky — Takes space and looks outdated
0 Votes
Coway Airmega 400
0 Votes
AirDoctor 3500i
Clunky — Unattractive and poorly designed
0 Votes
Coway Airmega 400
0 Votes
AirDoctor 3500i

Portability and Size

How convenient is the size and portability of this air purifier?

Very compact — Under 10 pounds
0 Votes
Coway Airmega 400
0 Votes
AirDoctor 3500i
Compact — 10 to 15 pounds
0 Votes
Coway Airmega 400
0 Votes
AirDoctor 3500i
Medium — 15 to 20 pounds
0 Votes
Coway Airmega 400
0 Votes
AirDoctor 3500i
Large — 20 to 25 pounds
0 Votes
Coway Airmega 400
0 Votes
AirDoctor 3500i
Very large — Over 25 pounds
0 Votes
Coway Airmega 400
0 Votes
AirDoctor 3500i

Pricing

How do you feel about the price of this air purifier?

Great value for money
0 Votes
Coway Airmega 400
0 Votes
AirDoctor 3500i
Pretty good price
0 Votes
Coway Airmega 400
0 Votes
AirDoctor 3500i
Fair deal
0 Votes
Coway Airmega 400
0 Votes
AirDoctor 3500i
Kinda pricey
0 Votes
Coway Airmega 400
0 Votes
AirDoctor 3500i
Crazy expensive
0 Votes
Coway Airmega 400
0 Votes
AirDoctor 3500i

Guides 2

Files 1

Coway Airmega 400 User Manual

accentuate.io
accentuate.io

Files 1

AIRDOCTOR 3500i User Manual

zendesk.com
zendesk.com

Reviews 0

The good, the bad, and the brutally honest.

Average Rating

Coway
Coway
Coway Airmega 400
Coway Airmega 400
0 / 5 0 Reviews
AirDoctor
AirDoctor
AirDoctor 3500i
AirDoctor 3500i
0 / 5 0 Reviews

Discussions 0

Thoughts, takes, and hot debates.

Awards 1

Only the best made it here.

Collections 0

Treasures You’ve picked. No fluff, all fun.

More Air Purifiers 0

Unlock more awesome finds.

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Other AirDoctor Air Purifiers 8

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vs