Air Purifiers for 400 Sq Ft Rooms

ENERGY STAR certified air purifiers whose listed room size is 400 sq ft or more. The listed room size is a matching rule, not a promise about coverage in every room; ENERGY STAR’s chart assumes an 8-foot ceiling.

67 models match · official ENERGY STAR product data · dataset updated 2026-11-06

At a glance

Matching models67 of 216 (31%)

Brands in the list33

CADR (smoke) (cfm)264 – 577 median 339

Room size (sq ft)409 – 894 median 525

Energy (kWh/yr)75 – 490 median 298

Ozone (ppb)0 – 5 median 0

Most listings come from Blueair (9), Coway (9), Midea (6), CUCKOO (5). Counts and ranges are calculated from the same official fields as the table below.

How models are selected

Rule: room size listed by ENERGY STAR ≥ 400 sq ft. Models with no value for the field are left out; a missing value is never treated as zero. The list is sorted by Room size, highest first, which is an ordering and not a recommendation.

67 matching models

Showing the first 50 of 67, in the order stated above.

Specs as listed by ENERGY STAR; “n/c” means the listing has no value.
Model	CADR (smoke)cfm	Room sizesq ft	EnergykWh/yr	Ozoneppb
Coway Airmega ProX	577	894	335	0
CUCKOO CAC-F3010FW	552	856	406	0
Soleusair GA1-W	523	811	463	0
Fellowes Aeramax SV	518	803	490	0
Winix Tower XQ	461	715	486	1
Blueair 4312111000	455	705	235	3
CUCKOO CAC-AH2810FNW	455	705	388	0
Blueair 3613111100	443	687	259	2
Coway Airmega 450(W)	443	687	389	0
Coway Airmega 450S(W)	443	687	399	0
Coway AP-3018B	413	640	235	0
HealthWay MAX500	413	640	430	0
Intellipure MAX500	413	640	430	0
LEVOIT LAP-C601S-WUSR	394	611	389	2
Blueair 6712211000	393	609	336	2
LEVOIT LAP-C601S-WUS	391	606	387	0
CUCKOO CAC-D2020FW	382	592	316	0
AIRMEGA AP-2425H	378	586	366	0
Coway AP-2425H	378	586	366	0
AIRMEGA AP-2015F	376	583	366	0
Coway AP-2015F	376	583	366	0
AirDoctor AD4000	370	574	396	1
Alen BreatheSmart 75i_V2	370	574	304	1
Rainbow Brisk Box Ultra	370	574	94	0
IQAir ATEM E	369	572	295	0
Midea KJ600G-RX600A	366	567	341	0
PURE CODE PAR001	366	567	341	0
Sharp KJ600F-LM1-SH	366	567	341	0
WOZOYO Pure Air PA6	363	563	373	0
Coway Airmega 350(W)	360	558	344	0
Blueair 3631101000	356	552	210	1
Smart Air CMKQ104	353	547	359	0
Blueair Pure 211+	348	539	350	5
Blueair 3432111100	339	525	227	2
Bosch Air 6000	339	525	289	0
Rainbow Luggable XL Ultra	333	516	81	0
Amazon Basics AP5110-UL	324	502	240	0
Blueair 4412311000	321	498	181	1
Atmosphere Sky 120539	316	490	298	0
AIRMEGA AP-1515H	315	488	314	0
Coway AP-1515H	315	488	314	0
Midea W	312	484	259	0
Toshiba W	312	484	259	0
CUCKOO CAC-K1910FW	306	474	325	0
Noma 143-0033-2	306	474	297	0
okaysou AirMac X7	306	474	297	0
Rainbow Luggable XXL	306	474	75	0
Midea KJ500G-L1	305	473	299	0
Sharp AirMac X7	305	473	299	0
Danby DAP290BAW	303	470	218	0

Related shortlists and tools

Air Purifiers for 300 Sq Ft Rooms 96 models
Air Purifiers for 500 Sq Ft Rooms 37 models
Air Purifiers for 200 Sq Ft Rooms 148 models
Air Purifiers with an Air Quality Sensor 76 models
Air Purifiers with No Reported Ozone 173 models
Air Purifiers with Wi-Fi 63 models
Air Purifier Room Size Calculator official sizing table
How to choose an air purifier: sizing, filters and costs
Air Purifiers: what matters when choosing

Sources

ENERGY STAR product guidance for air purifiers (data.energystar.gov, updated 2026-11-06)
AHAM Verifide: Air filtration standards (the 2/3 rule)

We compile and compare published data; we do not run our own product tests. See How We Compare.