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IQAir Atem X

Ranked #18 of 20 in Best Large-Room Air Purifiers: Coway, Blueair, Levoit, Winix, IQAir & More (2026). Here is every spec we scored, where it came from, and how it compares.

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#18

IQAir Atem X

Best for: IQAir's large round purifier, 15 dB on low

2.1/10

What we like

  • 15 dB(A) on its lowest speed
  • CO2 sensor

Watch out for

  • No AHAM CADR
  • No carbon stage listed in the US specs

Score breakdown

Smoke CADR * 47%
CADR per watt * 18%
Quietest setting 12%
Loudest setting 12%
Carbon or odor stage included 12%

* Not published by the manufacturer; scored at the lowest published value in this category, so an unpublished figure never outranks a published one.

Smoke CADRNot listed
CADR per wattNot listed
Quietest setting15 dB
Loudest setting58 dB
Carbon or odor stage includedNo
Main filter lifeNot listed
AHAM CADRNot published by the maker
IQAir CADR per speed65–471 cfm (IQAir's own figures, not AHAM)
CoverageUp to 1,650 ft² (2 air changes/hr, IQAir)
Power6–86 W across 8 speeds
Noise15–58 dB(A) at 3.3 ft
SensorsPM2.5, CO2, temperature, humidity
Weight28.7 lb
PriceCheck price
Check price at Amazon
Specs source:

IQAir Atem X head-to-head

Head-to-headBlueair Blue Signature vs IQAir Atem X

How it compares

Open the full comparison table

Coway Airmega ProX
8.3/10
#1 · The most clean air of any purifier here
Blueair Blue Signature
7.3/10
#2 · 455 CFM from a 13.2 lb side-outlet unit
Winix XQ
6.0/10
#3 · Winix's dual-filter large-room model, 461 CFM smoke
Blueair Blue Signature SP3i
5.7/10
#4 · The mid-size Signature, 321 CFM
Blueair Classic Pro CP7i
5.7/10
#5 · A two-filter, 393 CFM unit
Blueair Blue Pure 311i+ Max
5.6/10
#6 · 339 CFM at 7.9 lb
Coway Airmega 400S
4.8/10
#7 · Coway's large-room classic with app control
Rabbit Air A3
4.8/10
#8 · A wall-mountable purifier with a custom filter slot
Coway Airmega 300
4.2/10
#9 · The 400's smaller sibling, without an app
Levoit Core 400S
3.8/10
#10 · A cylinder purifier with 231 CFM at 38 W
Levoit EverestAir
3.8/10
#11 · Levoit's 354 CFM purifier with adjustable vents
Levoit Vital 200S
3.6/10
#12 · A 250 CFM purifier with a pet mode
Winix AT40
3.5/10
#13 · An Energy Star 265 CFM purifier
Winix T810
3.5/10
#14 · A 272 CFM tower with a numeric air display
Shark BreatheClear MAX (HP362)
3.5/10
#15 · Shark's biggest purifier, with up to 6 years before a filter change
Coway Airmega 250S
3.4/10
#16 · A slim, wall-friendly 249 CFM purifier
Shark NeverChange Air Purifier MAX (HP302)
2.3/10
#17 · A 5-year-filter purifier for up to 1,400 sq ft
Honeywell InSight HPA5300
2.1/10
#19 · Three HEPA filters for a 500 sq ft room
Molekule PECOAir+
2.0/10
#20 · PECO + HEPA filtration with CO2 and TVOC sensors