43 Air Purifiers for Rooms 350-499 sq ft, Ranked by Running Cost

← All room sizes

43 ENERGY STAR certified models, from about $14 to $60 a year to run at the US average electricity rate. CADR (PM2.5) is shown for reference — a higher number clears smoke and fine particles faster, independent of running cost. See how we calculate running costs.

Top 5 cheapest to run

All 43 models

Rank	Brand	Model	Room size	CADR (PM2.5)	Energy use	Est. cost/year
1	Rainbow Most Efficient	Luggable XXL	474 sq ft	330	75 kWh/yr	$14
2	Rainbow Most Efficient	Luggable Ultra	358 sq ft	260	93 kWh/yr	$17
3	Blueair Most Efficient	4412311000	498 sq ft	315	181 kWh/yr	$33
4	Blueair	3431101000	378 sq ft	246	182 kWh/yr	$33
5	Honeywell	HPA4300B	355 sq ft	233	185 kWh/yr	$34
6	Blueair	3332111100	439 sq ft	298	193 kWh/yr	$35
7	LEVOIT Most Efficient	LAP-C511S-WUS	467 sq ft	299	194 kWh/yr	$36
8	Coway	AP-1526D	395 sq ft	257	197 kWh/yr	$36
9	Honeywell	HPA6000B	398 sq ft	259	207 kWh/yr	$38
10	Frigidaire	FHAP2040A1	372 sq ft	241	213 kWh/yr	$39
11	Midea	US-KJ500G-TB32	470 sq ft	291	218 kWh/yr	$40
12	LAGO	LAPKJ500GTB32	470 sq ft	291	218 kWh/yr	$40
13	Danby	DAP290BAW	470 sq ft	291	218 kWh/yr	$40
14	Midea	793K20A	470 sq ft	291	218 kWh/yr	$40
15	Coway	AP-1523D	395 sq ft	256	219 kWh/yr	$40
16	Sharp	KCP70UW	395 sq ft	257	225 kWh/yr	$41
17	LEVOIT	LAP-C401S-WUSR	363 sq ft	234	235 kWh/yr	$43
18	Winix	C610	384 sq ft	250	235 kWh/yr	$43
19	Winix	C710	384 sq ft	250	235 kWh/yr	$43
20	LEVOIT	Core 400S	358 sq ft	236	237 kWh/yr	$43
21	Siesean	AP-400	357 sq ft	235	243 kWh/yr	$44
22	Siesean	AP-480	419 sq ft	270	245 kWh/yr	$45
23	Medify Air	MA-50-V3.0	409 sq ft	272	252 kWh/yr	$46
24	NuWave	47901	439 sq ft	281	258 kWh/yr	$47
25	Midea	CAF-Z85US	484 sq ft	303	259 kWh/yr	$47
26	Toshiba	CAF-Z85US	484 sq ft	303	259 kWh/yr	$47
27	Winix	T810	419 sq ft	271	259 kWh/yr	$47
28	Medify Air	MA-40-V4.0	380 sq ft	250	261 kWh/yr	$48
29	Winix	AT40	411 sq ft	261	272.02 kWh/yr	$50
30	Coway	AP-2023K	468 sq ft	306	277 kWh/yr	$51
31	CUCKOO	CAC-R1510FW	420 sq ft	272	281 kWh/yr	$51
32	Dreo	DR-HAP003S	456 sq ft	300	282 kWh/yr	$52
33	Midea	KJ500G-JA32	459 sq ft	303	292 kWh/yr	$53
34	Pelonis	KJ500G-JA32	459 sq ft	303	292 kWh/yr	$53
35	Blueair	7411371000	422 sq ft	279	294 kWh/yr	$54
36	Okaysou	AirMac X7	474 sq ft	310	297 kWh/yr	$54
37	Noma	143-0033-2	474 sq ft	310	297 kWh/yr	$54
38	Atmosphere	120539**	490 sq ft	310	298 kWh/yr	$55
39	Midea	KJ500G-L1	473 sq ft	309	299 kWh/yr	$55
40	Sharp	AirMac X7	473 sq ft	309	299 kWh/yr	$55
41	CleanForce	CP-Rainbow	437 sq ft	286	309 kWh/yr	$57
42	Coway	AP-1515H	488 sq ft	324	314 kWh/yr	$57
43	CUCKOO	CAC-K1910FW	474 sq ft	310	325 kWh/yr	$60

Estimated running cost = annual kWh × 18.31¢/kWh (July 2026 US average). Your own rate may be higher or lower — check your bill. ENERGY STAR figures are lab-test results; real-world use varies. This list includes discontinued and not-yet-sold certified models, and some brands are white-label relabels of the same unit.