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AirDoctor 2000i Review: Objective Air Quality Tests

Derek Hales

Written By: Derek Hales

Updated on:

Airdoctor 2000i
96 Purification
97 Build Quality
87 Noise
100 Usability
88 Maintenance
95.0 Overall Score
Tested With Scoring System 1.1

Best For

  • Small to medium-sized rooms (bedrooms, home office, etc.)
  • Powerful air purification performance in a small form factor
  • The New AirDoctor app expands the user functionality


  • High price for a small coverage air purifier.
  • High wind speed creates a lot of noise
  • High yearly maintenance costs for AirDoctor approved filters

Our Verdict

The AirDoctor 2000i is a fantastic update to the base model. The big change is the WiFi-connected app that allows the user to control every aspect of the AirDoctor 2000i purification. In addition, the 2000i continues to have an exceptional air purification performance that we typically only see with larger air purifiers.

However, there are some tradeoffs to having exceptional usability. The price is higher than most purifiers of its coverage. Additionally, it also comes with higher yearly maintenance costs, as you’ll need to purchase AirDoctor-approved filters. Finally, exceptional air purification performance comes with high wind speeds, which can create some noise.

Filter Type: HEPA, Carbon, Ionizer
Coverage Area: 610 sq. ft.

In This Review
Purification Performance | Ozone Test | Filters | Coverage | Build Quality | Noise Test | Usability | Maintenance | Size | Specs | Product Evolution | Comparison | FAQs

Performance Summary

At Modern Castle we test 11 different factors that impact the performance, build quality, and usability of the air purifier. Below is a complete list of our testing categories and their performance.

Test TypeTest Data
PM2.5 (1 hour test)0.2 ppm
PM10 (1 hour test)0.2 ppm
Particles (1 hour test)29
AQI (1 hour test)1
Ozone Detected0.0 ppm
Filter TypeHEPA, Carbon, Pre-Filter, Ionizer
Coverage Area610 sq. ft. (57 sq. m.)
Max Wind Speed16.3 mph (26.2 kph)
Noise Test65.1 dB

Purification Performance

To test the purification performance of the AirDoctor 2000i, we placed it in a medium-sized room in our office (~14’ x 10`). Next, we lit incense to introduce smoke and other particulates into the air for 30 seconds. After, we use a professional air quality detector to measure the smoke-filled air.

Air Quality Testing Meter
Electronic testing meter we use to measure particulates and air quality

Next, we run the air purifier on the highest fan speed for 2 hours, taking measurements of the air quality at the one hour mark and the end of the test. Here is what we found:

Performance MetricStarting MeasurementAfter 1 HourAfter 2 Hours
PM2.565.0 ppm0.2 ppm0.1 ppm
PM10111.8 ppm0.2 ppm0.1 ppm

In our air purification tests, the AirDoctor 2000i was able to reduce PM2.5 to 0.2 ppm. This is 0.29 ppm lower than the average of 0.49 ppm, based on all of our air purification tests to date.

AirDoctor 2000i
AirDoctor 2000i

Below, we’ve included information on the testing criteria and what defines good vs. bad air quality. Simply, the lower the numbers the better.

Air Quality Pm 25 Index

If we look at the 2-hour measurements, the AirDoctor 2000i further continues to improve the air quality by reducing the PM2.5 to 0.1 ppm.

Ozone Test

With most air purifiers ozone generation isn’t an issue. That said, some that use negative ion generators have the potential to create ozone. To test this, we run the AirDoctor 2000i, letting it run for 1 hour, and measure the levels of ozone before and after with an ozone meter device.

Pre-test Ozone

0.0 ppm

Post-test Ozone

0.0 ppm

In our ozone tests, the AirDoctor 2000i generated no measurable ozone during testing.



The filters are AirDoctor’s own proprietary filters that include 4 different filter types.

Airdoctor 2000i Prefilter

Pre-Filter – Pre-filters are designed to catch larger particulates and debris before it makes its way to the primary filters. This can include hair, lint, and more.

Airdoctor 2000i Carbon Filters

Carbon Filter – Carbon filters are able to remove smells, odors, and VOCs (volatile organic compounds).

Airdoctor 2000i Hepa Filter

HEPA Filter – The HEPA filter is the primary filtration layer. It removes ultra small particulates including dust, pollen, mold, and more.

Airdoctor 2000i Ionizer

Ionizer – Ionizers and similar technology release charged particles into the air. These particles clump with other airborne particulates, causing them to fall to the ground and cease to be airborne. This feature can be turned on / off.


The AirDoctor 2000i has a coverage area of 610 sq. ft. It is best suited for small to medium-sized rooms.

Coverage Area

610 sq. ft.


162 CFM

Comparing the AirDoctor 2000i to the average, it has a smaller coverage than our testing average. Across all air purifiers we’ve tested to date, the average coverage area is 747 sq. ft. and the average CADR is 290 CFM.

Wind Speed Test

Our wind speed test uses an anemometer placed directly on the air vents of the AirDoctor 2000i to measure the fan speeds in miles per hour. We run it on the lowest and highest fan speeds and record the speed of the air coming out of the device.

Minimum Wind Speed

8.3 mph

Maximum Wind Speed

16.3 mph

In our win speed test, the AirDoctor 2000i generated a maximum wind speed of 16.3 mph. This is 3.89 mph lower than the average of 12.41 mph, based on all of our wind speed tests to date.

This is a high wind speed for such a small system. Typically, we see higher fan speeds with the larger air purifiers that have bigger fans. However, there are multiple fan speeds on the AirDoctor 2000i for your preference.


Build Quality Test

Our build quality test is a subjective test where we examine and assess the major material and design components of the air purifier. Specifically, we are looking for build and design issues that are more likely to break and/or be difficult to use.

AirDoctor 2000i
AirDoctor 2000i

The build quality of the AirDoctor 2000i is exceptional when looking at their full line of air purifiers. The plastic is sturdy and does not rattle when handling the machine. They all come with a simple white glossy body that can fit into most decor. Additionally, it’s lightweight enough to be moved by picking it up and not needing to wheel it around.

PartBuild Quality
AirDoctor 2000i
AirDoctor 2000i

When compared to others, it is my view that AirDoctor 2000i feels strong and will last when compared to others of similar size. However, it entirely depends on how the air purifier is treated and the environment it operates in.


Noise Test

To determine the level of noise that the AirDoctor 2000i creates we use a sound meter and measure the decibel levels on both the lowest and highest fan speeds. In addition, we measure the ambient noise levels of the room as a baseline comparison.

Ambient Noise

43.9 dB

Min Noise

46.3 dB

Max Noise

65.1 dB

In our noise tests, the AirDoctor 2000i generated 65.1 dB of noise on the max fan speed. This is 2.86 dB more than the average of 62.24 dB, based on all of our noise tests to date.

This shocked us while testing the small machine. Typically, smaller form factor machines are quieter, as the motors are usually not as large or loud. However, a nice trade-off for this higher noise is the improved purification performance.



The AirDoctor 2000i is a small, compact air purifier that offers easy setup, high user functionality, and the new AirDoctor control app.



Set up took less than 5 minutes to remove the air purifier from the package and plug it in.

AirDoctor 2000i Packaging
AirDoctor 2000i Packaging

The most important step during setup is to remove the filters and remove the plastic packaging around the filters.


Controls & Display

The controls on the AirDoctor 2000i are on the top of the purifier. They are backlit with LEDs to help the user identify the current fan settings.

AirDoctor 2000i Controls
AirDoctor 2000i Controls

Wireless Controls

The new AirDoctor app allows for enhanced control and system status information at the user’s fingertips. The app allows the owner to control all features, functionalities, and maintenance alerts for the AirDoctor 2000i. It also displays room air quality and the local air quality / weather.

In The Box

  • 1 x AirDoctor 2000i
  • 1 x User Manual
  • 1 x Prefilter
  • 1 x HEPA Filter
  • 1 x Carbon Filter
Airdoctor 2000i Unboxed
Airdoctor 2000i Unboxed


The AirDoctor 2000i has an estimated yearly maintenance cost of $90. The following are the major maintenance tasks for the AirDoctor 2000i.

TaskDescriptionEst. Annual Cost
HEPA FilterReplace Every 8-12 Months$44.95
Carbon FilterReplace Every 8-12 Months$44.95
Pre FilterWash As Needed$0
SensorsRemove any obstructions as needed$0

Size & Dimensions

This is a smaller air purifier system. Designed for small to medium-sized rooms.

Height18.7″ (47.5 cm)
Length6.6″ (16.8 cm)
Width13.9″ (35.2 cm)
Weight10.0 lbs. (4.5 kg)


The following table details the product specifications according to the manufacturer.

Manufacturer Specifications
Height18.7″ (47.5 cm)
Length6.6″ (16.8 cm)
Width13.9″ (35.2 cm)
Weight10.0 lbs. (4.5 kg)
FilterHEPA, Carbon, Pre-Filter, Ionizer
Noise Levels65.1 dB (max)
Coverage Area610 sq. ft.
Wi-Fi CompatibleYes
Warranty1 year
PriceCheck Price

Product Evolution

The AirDoctor 2000i is an update to the existing AirDoctor 2000. The new “i” distinction indicates the AirPurifier is wifi / app compatible. The AD 2000i is joined by the 3500i and 5500i, which were also older models that are now upgraded with wifi.

AirDoctor 2000i
AirDoctor 2000i

In terms of air purification functionality, nothing has changed between the 2000i and 2000 models. The only difference is the addition of wifi compatibility.

How does AirDoctor 2000i compare?

Below is a complete list of our air purifier tests and critical product data compared side by side to the average based on all of our air purifier tests to date.

Test TypeTest DataAvg. Data
PM2.5 (1 hours)0.2 ppm0.49 ppm
PM10 (1 hours)0.2 ppm0.74 ppm
Particles (1 hours)2961.04
AQI (1 hours)11.91
Ozone Detected0.0 ppm0.0 ppm
Filter TypesHEPA, Carbon, Pre-Filter, Ionizern/a
Coverage Area610 sq. ft.744 sq. ft.
Max Wind Speed16.3 mph12.4 mph
Noise Test65.1 dB62.2 dB

Most notable is the purification performance for this smaller unit compared to larger systems. The PM2.5, PM10, AQI, and Number of Particles measured after the first hour are exceptional. Typically we see larger / more powerful air purifiers improve the air quality to these levels.

Other Air Purifiers to Consider

AIRDoctor 2000

AirDoctor 2000

This is the standard non-WiFi model of the AirDoctor 2000i

This would be best used for small to medium-sized rooms or small apartments.

Levoit Everestair

Levoit EverestAir

This is a similarly sized air purifier in both size and coverage

This has a quieter operating fan speed while providing similar coverage to the AirDoctor 2000i

Shark 3-in-1

Shark 3-in-1

The Shark 3-in-1 Air Purifier does the job of 3 appliances – a fan, a space heater, and an air purifier.

Not only does this have 3 different functionalities, but it also has a slower wind speed which might be ideal versus the AirDoctor 2000i.


Do AirDoctor HEPA filters remove mold?

Yes, HEPA filters can remove mold particulates from the air. However, if you suspect mold in your living area, we recommend professional assistance to prevent further mold exposure.

How long do the AirDoctor Filters last?

We recommend replacing filters every 8-12 months, depending on usage and environment. The new AirDoctor WiFi app will alert you if the filter needs changing sooner.

Is the AirDoctor 2000i too small to purify an apartment

This entirely depends on the square footage of the apartment. It’s rated for 610 sq. ft., which could cover most studio to 1-bedroom apartments.

About Derek Hales

Derek HalesDerek Hales is the Founder and Editor-in-Chief of He has been featured in Fast Company, Reader's Digest, Business Insider,, She Knows, and other major publications. Derek has a Bachelor's Degree in Business Administration from Kansas State University. Hales has been testing and reviewing products for the home since 2014.