Head-to-head

Coway Airmega AP-1512HH vs Blueair Blue Pure 311 Auto vs Levoit Core 600S

Coway Airmega AP-1512HH

8.3 $168.99

Blueair Blue Pure 311 Auto

8.1 $229

Levoit Core 600S

8.4 $299.99

Verdict

Coway Airmega AP-1

The bedroom default, and still an easy recommendation. AHAM-verified CADR strong enough to clean a typical bedroom at a quiet low speed, True HEPA, a washable pre-filter, and a 3-year warranty for under $200. The carbon is thin, so it's not your smoke or odor machine.

Blueair Blue Pure

Quiet, efficient, and easy. The 311 Auto clears a medium room in about 12 minutes, drops to a near-silent 23 dB, and adjusts itself on auto. The carbon's thin so heavy smoke isn't its job and there's no app, but for allergies and dander it's a clean pick.

Levoit Core 600S

When a bedroom unit can't keep up. The 600S has the airflow to clean a 600-plus sq ft open room about every 12 minutes, with smart sensing, app control, and a quiet 26 dB sleep mode. It roars at 59 dB on turbo, but for big rooms it's the value muscle.

Best for

Coway Airmega AP-1

Most bedrooms and medium-size rooms where you want verified CADR, quiet everyday use, and strong value for allergies or dust.

Blueair Blue Pure

Allergy and pet-dander households that want a simple mid-size-room purifier with auto mode and low-maintenance daily use.

Levoit Core 600S

Large rooms, open layouts, smoke events, and households that want stronger airflow plus smart controls.

Avoid if

Coway Airmega AP-1

large open layouts, heavy smoke events, or if you specifically want app control and a built-in air-quality display.

Blueair Blue Pure

wildfire smoke, large open rooms, or deeper odor control are the main reasons you are buying.

Levoit Core 600S

small bedrooms or desks where a quieter, cheaper, smaller purifier is enough.

Score breakdown

noise

Coway Airm

8.8

Blueair Bl

9.0

Levoit Cor

7.8

filter cost

Coway Airm

8.0

Blueair Bl

7.0

Levoit Cor

8.0

odor carbon

Coway Airm

6.5

Blueair Bl

6.0

Levoit Cor

6.0

room size cadr

Coway Airm

8.5

Blueair Bl

8.7

Levoit Cor

9.8

particle filtration

Coway Airm

9.2

Blueair Bl

8.8

Levoit Cor

9.0

Specs

cadr

246 dust / 240 pollen / 233 smoke (AHAM-verified)

250 smoke / 250 pollen / 244 dust (AHAM-verified)

~410 CFM smoke (AHAM-verified)

type

Bedroom / medium-room True HEPA purifier

Mid-size-room HEPASilent purifier

Large-room / open-layout smart HEPA purifier

noise

24.4-53.8 dB(A) across speeds

23-53 dB across speeds

~26 dB (sleep) to ~59 dB (turbo)

ozone

CARB certified. Optional Vital Ion mode emits trace ozone; it ships off and is best left off

—

power

~77W; Energy Star

7-35W; Energy Star, AHAM & CARB certified

~49W max

weight

~12.3 lb

~7 lb

~13 lb

coverage

361 sq ft at 4.8 ACH (up to ~874 sq ft at 2 ACH)

~388 sq ft at ~4.8 ACH (full clean ~every 12.5 min)

~635 sq ft at ~4.8 ACH (Levoit markets up to ~3,175 sq ft at 1 ACH)

warranty

3-year

1-year limited

—

dimensions

16.8 x 18.3 x 9.6 in (W x H x D)

~13 x 13 x 20.5 in (W x D x H)

~12.3 x 12.3 x 23.6 in

filtration

4-stage: washable pre-filter, activated-carbon deodorizer, True HEPA, optional Vital Ion

3-stage: washable fabric pre-filter, HEPASilent particle filter (99.97% to 0.1 micron), activated carbon

3-in-1: pre-filter, True HEPA (HEPA-grade in Sleep Mode), activated carbon (99.97% at 0.1-0.3 micron)

fan control

3 manual speeds + Auto + Eco mode

One-button Auto mode + manual speeds; particle sensor

Multiple speeds + Auto + Sleep mode

filter life

True HEPA ~12 months; carbon ~6-12 months; pre-filter washable

Combined particle + carbon filter ~6 months; pre-filter washable

Core 600S-RF replacement ~12 months; pre-filter washable

smart features

AQI sensor + color LED, filter indicator, timer; no Wi-Fi or app on the base model

Auto + 3-color AQI LED; no Wi-Fi/app (311i adds it)

Wi-Fi + VeSync app, Alexa/Google, AirSight Plus PM2.5 sensor, Auto/Sleep, light sensor, timer

Buy →Buy →Buy →

	Coway Airmega AP-1512HH	Blueair Blue Pure 311 Auto	Levoit Core 600S
Score	8.3	8.1	8.4
Price	$168.99	$229	$299.99
Verdict	The bedroom default, and still an easy recommendation. AHAM-verified CADR strong enough to clean a typical bedroom at a quiet low speed, True HEPA, a washable pre-filter, and a 3-year warranty for under $200. The carbon is thin, so it's not your smoke or odor machine.	Quiet, efficient, and easy. The 311 Auto clears a medium room in about 12 minutes, drops to a near-silent 23 dB, and adjusts itself on auto. The carbon's thin so heavy smoke isn't its job and there's no app, but for allergies and dander it's a clean pick.	When a bedroom unit can't keep up. The 600S has the airflow to clean a 600-plus sq ft open room about every 12 minutes, with smart sensing, app control, and a quiet 26 dB sleep mode. It roars at 59 dB on turbo, but for big rooms it's the value muscle.
Best for	Most bedrooms and medium-size rooms where you want verified CADR, quiet everyday use, and strong value for allergies or dust.	Allergy and pet-dander households that want a simple mid-size-room purifier with auto mode and low-maintenance daily use.	Large rooms, open layouts, smoke events, and households that want stronger airflow plus smart controls.
Avoid if	large open layouts, heavy smoke events, or if you specifically want app control and a built-in air-quality display.	wildfire smoke, large open rooms, or deeper odor control are the main reasons you are buying.	small bedrooms or desks where a quieter, cheaper, smaller purifier is enough.
Score breakdown
noise	8.8	9.0	7.8
filter cost	8.0	7.0	8.0
odor carbon	6.5	6.0	6.0
room size cadr	8.5	8.7	9.8
particle filtration	9.2	8.8	9.0
Specs
cadr	246 dust / 240 pollen / 233 smoke (AHAM-verified)	250 smoke / 250 pollen / 244 dust (AHAM-verified)	~410 CFM smoke (AHAM-verified)
type	Bedroom / medium-room True HEPA purifier	Mid-size-room HEPASilent purifier	Large-room / open-layout smart HEPA purifier
noise	24.4-53.8 dB(A) across speeds	23-53 dB across speeds	~26 dB (sleep) to ~59 dB (turbo)
ozone	CARB certified. Optional Vital Ion mode emits trace ozone; it ships off and is best left off	—	—
power	~77W; Energy Star	7-35W; Energy Star, AHAM & CARB certified	~49W max
weight	~12.3 lb	~7 lb	~13 lb
coverage	361 sq ft at 4.8 ACH (up to ~874 sq ft at 2 ACH)	~388 sq ft at ~4.8 ACH (full clean ~every 12.5 min)	~635 sq ft at ~4.8 ACH (Levoit markets up to ~3,175 sq ft at 1 ACH)
warranty	3-year	1-year limited	—
dimensions	16.8 x 18.3 x 9.6 in (W x H x D)	~13 x 13 x 20.5 in (W x D x H)	~12.3 x 12.3 x 23.6 in
filtration	4-stage: washable pre-filter, activated-carbon deodorizer, True HEPA, optional Vital Ion	3-stage: washable fabric pre-filter, HEPASilent particle filter (99.97% to 0.1 micron), activated carbon	3-in-1: pre-filter, True HEPA (HEPA-grade in Sleep Mode), activated carbon (99.97% at 0.1-0.3 micron)
fan control	3 manual speeds + Auto + Eco mode	One-button Auto mode + manual speeds; particle sensor	Multiple speeds + Auto + Sleep mode
filter life	True HEPA ~12 months; carbon ~6-12 months; pre-filter washable	Combined particle + carbon filter ~6 months; pre-filter washable	Core 600S-RF replacement ~12 months; pre-filter washable
smart features	AQI sensor + color LED, filter indicator, timer; no Wi-Fi or app on the base model	Auto + 3-color AQI LED; no Wi-Fi/app (311i adds it)	Wi-Fi + VeSync app, Alexa/Google, AirSight Plus PM2.5 sensor, Auto/Sleep, light sensor, timer
	Buy →	Buy →	Buy →

PickGrade may earn a commission from purchases made through links on this page, at no extra cost to you. This never affects our grades. Full disclosure.