The best quiet smart air purifier lists a low decibel figure and still lets you run it from a phone app. We ranked five smart models from 20 dB to 22 dB and compared their sleep modes and sensors.
See also our best smart air purifier and quiet smart air purifier reviews guides. Every pick comes from the makers’ specifications on each Amazon listing, not our own testing, and our Editorial Policy explains how we work. Replace filters on the schedule each maker lists and keep the air intake clear.
Our Top 3 Picks for the Best Quiet Smart Air Purifier
Frigidaire PureA300 quiet smart air purifier with Wi-Fi and Smart Mode
- Lists a 20 dB noise level, the lowest of these five picks
- Smart Mode adjusts settings as air quality changes
- Frigidaire app sets schedules, tracks air quality and monitors filter life
Coway Airmega 400S smart air purifier with IoCare app and Eco Mode
- Eco Mode turns the fan off after 30 minutes of purified air
- IoCare app shows indoor and outdoor air quality
- Smart Mode adjusts fan speed to the room’s air quality
DHYALA KJ02 smart air purifier with H13 True HEPA filter and 22 dB Sleep Mode
- 5-stage filtration with an H13 True HEPA filter
- Lists a CADR of 271 CFM and 3,620 sq ft in one hour
- Sleep Mode drops the fan to its minimum at a listed 22 dB
As an Amazon Associate we earn from qualifying purchases.
Quiet Smart Air Purifiers Compared
| # | Product | Key Features | |
|---|---|---|---|
| 1 |  Frigidaire PureA300 quiet smart air purifier with Wi-Fi and Smart Mode |
| Check Latest Price |
| 2 |  Coway Airmega 400S smart air purifier with IoCare app and Eco Mode |
| Check Latest Price |
| 3 |  DHYALA KJ02 smart air purifier with H13 True HEPA filter and 22 dB Sleep Mode |
| Check Latest Price |
| 4 |  CLESDF smart app air purifier with PM2.5 display and 22 dB Sleep Mode |
| Check Latest Price |
| 5 |  Levoit Vital Pet smart air purifier with dual PM2.5 and odor sensors |
| Check Latest Price |
As an Amazon Associate we earn from qualifying purchases.
1. Frigidaire PureA300 quiet smart air purifier with Wi-Fi and Smart Mode
Best Overall
- Lists a 20 dB noise level, the lowest of these five picks
- Smart Mode adjusts settings as air quality changes
- Frigidaire app sets schedules, tracks air quality and monitors filter life
- Controller list includes Amazon Alexa and Google Assistant
- Its 3 filter stages trail the 5-stage system on DHYALA KJ02
- Sensor: Air quality light indicator
- Coverage: 850 sq ft at 1 air change per hour
- Weight: 7.5 lb
Frigidaire lists the PureA300 at 20 dB and pitches it for small bedrooms. Its PureAir RAC-16 HEPA filter is listed to capture up to 99.99% of airborne particles as small as 0.3 microns.
The listing gives 4.8 air changes per hour in smaller rooms or 1 per hour in rooms up to 850 sq ft. It measures 9.2 by 9.2 by 16 inches and weighs 7.5 pounds.
Right buyer for the Frigidaire PureA300
It suits a small bedroom where the lowest listed noise level matters most.
Wrong buyer for the Frigidaire PureA300
Skip it if you want more filter stages, since DHYALA KJ02 lists a 5-stage system.
As an Amazon Associate we earn from qualifying purchases.
2. Coway Airmega 400S smart air purifier with IoCare app and Eco Mode
Best Fan-Off Eco Mode
- Eco Mode turns the fan off after 30 minutes of purified air
- IoCare app shows indoor and outdoor air quality
- Smart Mode adjusts fan speed to the room’s air quality
- Lists coverage of 3,120 sq ft in 60 minutes
- Lists 22 dB, above Frigidaire PureA300 at 20 dB and Levoit Vital Pet at 21 dB
- Lists only Alexa for voice, while Frigidaire PureA300 and DHYALA KJ02 also list Google Assistant
- Sensor: Air quality monitor
- Coverage: 3,120 sq ft in 60 min
- Weight: 24.7 lb
Coway pairs a pre-filter and an active carbon filter with a HEPA filter. The set is listed to reduce 99.97% of 0.3 micron particles, along with VOCs and odor.
In Eco Mode the fan shuts off once the room stays purified for 30 minutes, then restarts when pollution is detected. IoCare also handles filter alerts, scheduling and fan speed.
Right buyer for the Coway Airmega 400S
It suits a large living area where you want the fan to switch off once the air stays clean.
Wrong buyer for the Coway Airmega 400S
Skip it if you want the lowest listed noise, since Frigidaire PureA300 lists 20 dB.
As an Amazon Associate we earn from qualifying purchases.
3. DHYALA KJ02 smart air purifier with H13 True HEPA filter and 22 dB Sleep Mode
Most Filter Stages
- 5-stage filtration with an H13 True HEPA filter
- Lists a CADR of 271 CFM and 3,620 sq ft in one hour
- Sleep Mode drops the fan to its minimum at a listed 22 dB
- App, touch screen, Alexa and Google Assistant control
- Lists 22 dB in Sleep Mode, above Frigidaire PureA300 at 20 dB and Levoit Vital Pet at 21 dB
- Sensor: Real-time air quality sensor
- CADR: 271 CFM
- Coverage: 3,620 sq ft in 1 hr
DHYALA lists a CADR of 271 CFM and coverage of 3,620 sq ft in one hour. A 360 degree air intake feeds an electrostatic pre-filter and an activated carbon filter.
The app handles power, custom and sleep modes, the timer, fan speed and filter reminders. A pet lock, a bite-proof power cord and a lying platform for pets round out the design.
Right buyer for the DHYALA KJ02
It suits open living spaces where you want a big listed CADR without giving up a 22 dB Sleep Mode.
Wrong buyer for the DHYALA KJ02
Skip it if the quietest listed level is your goal, since Frigidaire PureA300 lists 20 dB.
As an Amazon Associate we earn from qualifying purchases.
4. CLESDF smart app air purifier with PM2.5 display and 22 dB Sleep Mode
Best Lights-Off Sleep Mode
- Sleep Mode runs at a listed 22 dB with all display lights off
- AQI display shows real-time PM2.5 levels with color-coded lights
- Timer offers 2, 4, 8, 16 and 24 hour settings
- Auto Mode boosts fan speed when its sensor detects pollutants
- The maker notes the app only supports 2.4GHz Wi-Fi
- Sensor: PM2.5 sensor
- Fan Speeds: 4
- Timer: 2 to 24 hr
CLESDF lists this model for spaces up to 3,500 sq ft. Its 3-stage HEPA system is listed to capture 99.97% of airborne particles as small as 0.3 microns.
Four fan speeds and a child lock sit alongside the five timer settings. The listing names ETL and FCC among its certifications.
Right buyer for the CLESDF Smart Purifier
It suits a bedroom where you want the display fully dark while the fan runs in Sleep Mode.
Wrong buyer for the CLESDF Smart Purifier
Skip it if you want outdoor air data too, since Coway Airmega 400S shows indoor and outdoor air quality in IoCare.
As an Amazon Associate we earn from qualifying purchases.
5. Levoit Vital Pet smart air purifier with dual PM2.5 and odor sensors
Best Pet Odor Sensor
- Lists a 21 dB noise level
- Dual odor and PM2.5 sensors adjust the fan speed on their own
- Pet Plus mode offers custom settings for walks and time away
- Wide U-shaped inlet and washable pre-filter catch floating pet hair
- Lists 3 filter stages, fewer than the 5 stages on DHYALA KJ02
- Sensor: PM2.5 and odor
- Weight: 9.7 lb
- Size: 12.9 x 7.4 x 16.3 in
Levoit lists the Vital Pet at 21 dB with a floor area of 222 sq ft. In Sleep Mode its HEPA-grade filtration is listed to remove 99.97% of 0.3 micron particles.
Levoit lists VeSync app control, voice control and smart scheduling, plus a filter indicator light. A display lock and a chew-resistant cable are also listed.
Right buyer for the Levoit Vital Pet
It suits pet owners who want a 21 dB unit that reacts to odors as well as particles.
Wrong buyer for the Levoit Vital Pet
Skip it if you need to cover an open floor plan, since Coway Airmega 400S lists 3,120 sq ft in 60 minutes.
As an Amazon Associate we earn from qualifying purchases.
How to Choose the Best Quiet Smart Air Purifier
- Compare the lowest listed noise. Frigidaire PureA300 lists 20 dB and Levoit Vital Pet 21 dB. Meanwhile, Coway Airmega 400S, DHYALA KJ02 and CLESDF Smart Purifier list 22 dB.
- Check how each sleep setting behaves. CLESDF Smart Purifier turns all display lights off at 22 dB, and DHYALA KJ02 drops its fan to the minimum.
- Look for automatic adjustment. Frigidaire PureA300 and Coway Airmega 400S use Smart Mode, and Levoit Vital Pet adjusts speed from odor and PM2.5 sensors.
- Match the size to the spot. Frigidaire PureA300 measures 9.2 by 9.2 inches at 7.5 pounds, while Coway Airmega 400S is 14.8 by 14.8 inches at 24.7 pounds.
- Weigh quiet against room size. DHYALA KJ02 lists 3,620 sq ft in one hour and Coway Airmega 400S lists 3,120 sq ft in 60 minutes.
Frequently Asked Questions
Which quiet smart air purifier lists the lowest decibel level?
Frigidaire PureA300 lists 20 dB and Levoit Vital Pet lists 21 dB. Coway Airmega 400S, DHYALA KJ02 and CLESDF Smart Purifier each list 22 dB.
Which pick turns its display lights off in Sleep Mode?
CLESDF Smart Purifier lists a 22 dB Sleep Mode with all display lights turned off. It also offers a timer from 2 to 24 hours.
Can a quiet purifier also handle a large open space?
DHYALA KJ02 lists 3,620 sq ft in one hour with a 271 CFM CADR. Coway Airmega 400S lists 3,120 sq ft in 60 minutes, and both list 22 dB.
Which quiet picks work with Google Assistant?
Frigidaire PureA300 and DHYALA KJ02 list both Alexa and Google Assistant. Coway Airmega 400S lists Alexa.
Final Verdict
Our best quiet smart air purifier pick is the Frigidaire PureA300 for its listed 20 dB, Smart Mode and 7.5 pound body. Choose Coway Airmega 400S for an Eco Mode that turns the fan off and DHYALA KJ02 for 5 filter stages.
Best Overall: Frigidaire PureA300 quiet smart air purifier with Wi-Fi and Smart Mode Check Latest Price
Best Fan-Off Eco Mode: Coway Airmega 400S smart air purifier with IoCare app and Eco Mode Check Latest Price
Most Filter Stages: DHYALA KJ02 smart air purifier with H13 True HEPA filter and 22 dB Sleep Mode Check Latest Price
Check each listing for current filter part numbers before you order replacements.
As an Amazon Associate we earn from qualifying purchases.
Write Your Review
No reviews yet. Be the first to share your experience!