Air purifier · medium-room
Levoit Core 300S
A compact smart HEPA purifier for bedrooms and small-to-medium rooms with app and voice control.
Bottom line
In our scoring the Levoit Core 300S earns 7.1/10, a mixed result, and it stands out on practical fit (10.0/10). On the data, its 175 cfm CADR is AHAM-verified. Filters run about $45 a year (~$375 over five years with the device), a typical running cost. Its weakest area in our scoring is certification (5.0/10).
Where to buy
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Total cost of ownership
Checked 42 days ago- Annual filters
- $45/yr
- Device
- $150
- 5-year total
- $375
Certifications
- ANSI/AHAM AC-1smoke, dust, pollen
- Energy Star Room Air Cleanersefficiency
Filters only protect you on their swap schedule. Get an email reminder when this one is due - one note around swap time, nothing else.
Overview
The Levoit Core 300S is a medium-room air purifier built around a H13 filter. Its Clean Air Delivery Rate is AHAM-verified at 175 cfm, and it uses no ionizer and no ozone-generating stage. Filters run about $45 per year, a typical running cost.
By the numbers
- Clean Air Delivery Rate
- 175 cfm (AHAM-verified)
- Real coverage at 4.8 ACH
- ~271 sq ft
- Manufacturer room claim
- 219 sq ft
- Filter
- H13
- Ozone / ionizer
- no ionizer and no ozone-generating stage
- Noise (low)
- 24 dBA, 24 dBA sleep
- Power draw
- 26 W
- Annual filter cost
- $45/yr
- 5-year cost of ownership
- $375 (device + filters)
- Certifications
- ANSI/AHAM AC-1, Energy Star Room Air Cleaners
Strengths
- + Safety: 8.0/10
- + Practical Fit: 10.0/10
Watch-outs
- No significant weaknesses flagged.
Who it is for
- · Bedrooms and medium living spaces
- · Anyone sensitive to ozone, or with asthma or allergies
- · Light sleepers - it is near-silent on its lowest setting
What to know before buying
- · The replacement is the Core 300-RF (sold as the Core 300S-P 3-in-1 H13 filter), combining pre-filter, HEPA, and activated carbon in one unit that Levoit recommends replacing roughly every six to eight months.
- · AHAM CADR is about 141 cfm and Levoit's recommended room size is around 219 sq ft, so it is sized for small rooms rather than large spaces.
- · Measured noise ranges from about 22 dB in sleep mode to roughly 50 dB at top speed, and it draws about 26 W.
- · Vesync (Levoit's parent) voluntarily discontinued the 'True HEPA' / 'HEPA H13' marketing language in 2023 after a Dyson NAD challenge; independent tests still measure the filter as high-efficiency HEPA-grade, so we score the measured performance, not the dropped label.
How it scored
Verified Performance
7.0/10 · 30%AHAM CADR, true sealed HEPA, air changes per hour, honest room-size match.
- +3AHAM Verifide CADR published A175 cfm (AHAM Verifide) - CADR is third-party verified by AHAM, not a manufacturer claim.
- +2Hits ~5 air changes/hour at rated room B6 ACH at 219 sq ft - Delivers at least 4.8 air changes per hour at its rated room size.
- +2Honest room-size claim Brated 219 sq ft, CADR supports 271 - Claimed room size is within what the unit's own CADR can clean.
Total Cost of Ownership
6.0/10 · 25%Computed annual filter cost vs the room-size class median. The number nobody surfaces.
- +5Annual filter cost vs class median A$44.99/yr (below class median) - Computed annual filter cost scored against the room-size class median.
- +1No proprietary filter lock-in Bcross-compatible filters - Filters are sold separately with cross-compatible equivalents.
Certification
5.0/10 · 15%AHAM Verifide, Energy Star, CARB, published lab efficiency.
- +2Energy Star certified AEnergy Star - Energy Star certified for energy efficiency.
- +3Published lab-tested efficiency AAHAM-listed CADR - Filtration performance is independently lab-tested and published.
Safety
8.0/10 · 15%Ozone and ionizer behavior. Ozone generators hard-fail.
- +8No ozone-generating technology Ano ionizer / no ozone - No ionizer, plasma, or ozone-emitting stage.
Practical Fit
10.0/10 · 15%Noise, filter-change indicator, energy draw. Smart features are neutral.
- +4Quiet at low speed B24 dBA low - Runs at 50 dBA or quieter on its lowest useful speed.
- +2Near-silent sleep mode B24 dBA sleep - Sleep/night setting is 30 dBA or quieter.
- +2Filter-change indicator Bindicator present - Tells you when the filter actually needs replacing.
- +2Energy draw disclosed B26 W - Discloses power draw at a standard speed.
- ·Smart features (neutral) Capp / auto mode - App control and auto mode are neither rewarded nor penalized.
FAQ
- Is the Levoit Core 300S's CADR AHAM-verified, and does it emit ozone?
- Its 175 cfm Clean Air Delivery Rate is AHAM-verified - independently tested, not a box claim. It has no ionizer and no ozone-generating stage.
- Does the app require a specific Wi-Fi network?
- The Core 300S connects through the VeSync app and, like most smart-home devices, pairs only over a 2.4 GHz Wi-Fi band rather than 5 GHz.
- Is there a non-smart version?
- Yes. The Core 300 is the non-Wi-Fi version; it uses the same Core 300-RF filter but has no app, sensor-driven auto mode, or scheduling.
Compared head-to-head
Related guides
This score is our opinion under our published rubric, not a statement of objective fact or a lab test of this product. We score what third-party certifications prove; absence of a certification means we found no verification, not that a product fails to perform. Last reviewed 2026-06-06. Scored under air-v1.0. Prices were last checked 42 days ago; the freshness chip above the cost panel shows the current state. See the methodology for how each rule fires.