A few of our Airmega models could technically fit in your living room. But the one that fits best often comes down to square footage.
Our quick advice: Measure your room, match it to the coverage below, and then decide whether you want the smart, Wi-Fi-connected S version or the standard model.
For those who want a more in-depth guide, we’re breaking down the 250, 300, and 400 models by square footage, features, and price, so you can find the right fit in the time it takes to measure your room.
How Does Room Size Determine Which Airmega You Need?
Coverage numbers on our Airmega listings reflect two air changes per hour, meaning the unit filters the room's full volume twice every 60 minutes.Â
For context, the EPA recommends air purifiers that deliver at least 4.8 air changes per hour for the room size, since going much higher than that adds energy cost without a meaningful gain in air quality. That's why measuring your square footage matters more than picking the biggest model on the shelf. A 400 in a 400-square-foot bedroom is doing far more work than the space needs. A 250 in a 1,400-square-foot open floor plan might not keep up as easily as Airmegas built for bigger spaces.
Start by measuring the length and width of the room where the unit will live most often. Then match that number against the coverage specs for each model.
Airmega 250 and 250S for Bedrooms and Home Offices
The Airmega 250 and 250S clean rooms up to 930 square feet, making them a fit for primary bedrooms, guest rooms, home offices, and nurseries. Both run on the Max2 filter system, which pairs a washable pre-filter with an activated carbon and Green True HEPA filter to capture particles down to 0.01 microns.
Both models offer Smart Mode with Auto, Sleep, and Eco settings, plus Rapid Mode for a quick boost when air quality dips. Noise ranges from 22 to 54 dB(A), with a near-silent setting for overnight use. The 250S adds Wi-Fi connectivity through the IoCare+ app, voice control via Google Home and Alexa, and remote scheduling. The standard 250 covers the same square footage without the app.
Airmega 300 for Living Rooms and Open Layouts
The Airmega 300 steps up to 1,256 square feet of coverage, which fits most living rooms, combined kitchen and dining areas, and finished basements. CADR ratings come in at 285 for smoke, 306 for dust, and 339 for pollen, giving it more filtering power per hour than the 250 line.
Airflow runs across Sleep, Low, Medium, and High settings, with the same three smart modes and real-time air quality monitoring through a colored LED indicator. Noise sits between 22 and 52 dB(A).
Airmega 400 and 400S for Large or Open-Concept Spaces
The Airmega 400 and 400S cover up to 1,560 square feet, the widest range in the mid-sized lineup. This makes them the pick for open-concept main floors, large primary suites, or households running one purifier to cover most of the main living space. CADR ratings reach 328 for smoke, 328 for dust, and 400 for pollen.
Both models pull air through two filter sets for dual-sided suction, use the same Auto, Sleep, and Eco smart settings as the rest of the lineup, and run between 22 and 52 dB(A). The 400S adds Wi-Fi, app scheduling, and voice control. The 400 delivers the same filtration and coverage as a standalone unit.
Should You Choose the Smart S Model or the Standard Model?
Every S model in the mid-sized lineup filters air exactly like its standard counterpart. The difference is control.
- Choose an S model if you want to check air quality from your phone, set schedules remotely, or use voice commands through Google Home or Alexa.Â
- Choose the standard model if the unit will run on Smart Mode most of the time and you don't need app access.
Price is the other factor. Standard models typically run less than their S counterparts for the same coverage and filtration, so the choice often comes down to how much you value remote control versus saving on the upfront cost.
FAQ About Mid-sized Air Purifiers
What Is the Difference Between the Airmega 250 and Airmega 300
The Airmega 300 covers more square footage, up to 1,256 square feet, compared to 930 for the 250, and has a higher CADR rating across smoke, dust, and pollen. Both use the same Max2 filtration technology and smart modes.
Do the S Models Clean Air Better Than the Standard Models
No. The S models use the same filtration and coverage as their standard counterparts. The only difference is Wi-Fi connectivity, app control, and voice control.
Can I Use the Airmega 400 in a Studio Apartment
Yes! The Airmega 400 or 400S covers up to 1,560 square feet, more than enough for most studio or one-bedroom apartments, and works well for open layouts where one unit needs to cover the whole space.
Not sure which model fits your room? Compare all Airmega models and filter by square footage to find your match.
Which Midsized Airmega Is Right for Your Space?
A few of our Airmega models could technically fit in your living room. But the one that fits best often comes down to square footage.
Our quick advice: Measure your room, match it to the coverage below, and then decide whether you want the smart, Wi-Fi-connected S version or the standard model.
For those who want a more in-depth guide, we’re breaking down the 250, 300, and 400 models by square footage, features, and price, so you can find the right fit in the time it takes to measure your room.
How Does Room Size Determine Which Airmega You Need?
Coverage numbers on our Airmega listings reflect two air changes per hour, meaning the unit filters the room's full volume twice every 60 minutes.Â
For context, the EPA recommends air purifiers that deliver at least 4.8 air changes per hour for the room size, since going much higher than that adds energy cost without a meaningful gain in air quality. That's why measuring your square footage matters more than picking the biggest model on the shelf. A 400 in a 400-square-foot bedroom is doing far more work than the space needs. A 250 in a 1,400-square-foot open floor plan might not keep up as easily as Airmegas built for bigger spaces.
Start by measuring the length and width of the room where the unit will live most often. Then match that number against the coverage specs for each model.
Airmega 250 and 250S for Bedrooms and Home Offices
The Airmega 250 and 250S clean rooms up to 930 square feet, making them a fit for primary bedrooms, guest rooms, home offices, and nurseries. Both run on the Max2 filter system, which pairs a washable pre-filter with an activated carbon and Green True HEPA filter to capture particles down to 0.01 microns.
Both models offer Smart Mode with Auto, Sleep, and Eco settings, plus Rapid Mode for a quick boost when air quality dips. Noise ranges from 22 to 54 dB(A), with a near-silent setting for overnight use. The 250S adds Wi-Fi connectivity through the IoCare+ app, voice control via Google Home and Alexa, and remote scheduling. The standard 250 covers the same square footage without the app.
Airmega 300 for Living Rooms and Open Layouts
The Airmega 300 steps up to 1,256 square feet of coverage, which fits most living rooms, combined kitchen and dining areas, and finished basements. CADR ratings come in at 285 for smoke, 306 for dust, and 339 for pollen, giving it more filtering power per hour than the 250 line.
Airflow runs across Sleep, Low, Medium, and High settings, with the same three smart modes and real-time air quality monitoring through a colored LED indicator. Noise sits between 22 and 52 dB(A).
Airmega 400 and 400S for Large or Open-Concept Spaces
The Airmega 400 and 400S cover up to 1,560 square feet, the widest range in the mid-sized lineup. This makes them the pick for open-concept main floors, large primary suites, or households running one purifier to cover most of the main living space. CADR ratings reach 328 for smoke, 328 for dust, and 400 for pollen.
Both models pull air through two filter sets for dual-sided suction, use the same Auto, Sleep, and Eco smart settings as the rest of the lineup, and run between 22 and 52 dB(A). The 400S adds Wi-Fi, app scheduling, and voice control. The 400 delivers the same filtration and coverage as a standalone unit.
Should You Choose the Smart S Model or the Standard Model?
Every S model in the mid-sized lineup filters air exactly like its standard counterpart. The difference is control.
Price is the other factor. Standard models typically run less than their S counterparts for the same coverage and filtration, so the choice often comes down to how much you value remote control versus saving on the upfront cost.
FAQ About Mid-sized Air Purifiers
What Is the Difference Between the Airmega 250 and Airmega 300
The Airmega 300 covers more square footage, up to 1,256 square feet, compared to 930 for the 250, and has a higher CADR rating across smoke, dust, and pollen. Both use the same Max2 filtration technology and smart modes.
Do the S Models Clean Air Better Than the Standard Models
No. The S models use the same filtration and coverage as their standard counterparts. The only difference is Wi-Fi connectivity, app control, and voice control.
Can I Use the Airmega 400 in a Studio Apartment
Yes! The Airmega 400 or 400S covers up to 1,560 square feet, more than enough for most studio or one-bedroom apartments, and works well for open layouts where one unit needs to cover the whole space.
Not sure which model fits your room? Compare all Airmega models and filter by square footage to find your match.