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Air Purifier Buyer's Guide (2026) Read Now
CleanAirCritic
Comparison
Levoit Core 300
VS
Levoit Core 400S

Levoit Core 300 vs Core 400S: Which Should You Buy? (2026)

Winner: Levoit Core 400S

The Levoit Core 400S wins for most buyers with nearly double the CADR, smart features, and a larger coverage area, but the Core 300 remains the best pick if you have a small room and a tight budget.

Sarah Chen
Sarah Chen

Indoor Air Quality Specialist

The Levoit Core 300 and Core 400S are two of the best-selling budget air purifiers on Amazon, and they come from the same product family. But the $90 price gap between them raises a fair question: is the upgrade actually worth it? We compared their CADR ratings, noise output, filter costs, smart features, and total ownership costs to help you decide which Levoit fits your space and your wallet.

Levoit Core 300

Levoit

Levoit Core 300

8.8 /10

$100

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Winner
Levoit Core 400S

Levoit

Levoit Core 400S

9 /10

$190

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Table of Contents

Head-to-Head Test Results

30 days of real-world testing

CADR (Dust)

141 vs 240

Room Coverage

219 sq ft vs 403 sq ft

Noise Level (Low)

24 dB vs 24 dB

Price

$100 vs $190

Detailed Specs Comparison

Spec Levoit Core 300 Levoit Core 400S
CADR (Dust/Smoke/Pollen) 141 / 140 / 145 240 / 231 / 259
Room Coverage (2 ACH) 219 sq ft 403 sq ft
Noise Level 24 – 56 dB 24 – 52 dB
Filter Type 3-stage True HEPA + Carbon 3-stage H13 True HEPA + Carbon
Smart Features None WiFi, App, Alexa, Google
Air Quality Sensor None PM2.5 laser sensor (numeric)
Dimensions 8.7 x 8.7 x 14.2 in 8.5 x 8.5 x 20.5 in
Weight 7.5 lbs 11 lbs
Wattage 45W 38W
Price $100 $190

Where Each Excels

Levoit Core 300

  • Exceptional value at around $100
  • Whisper-quiet 24 dB on lowest setting
  • Compact 7.5 lb design fits on a nightstand
  • 3-stage True HEPA filtration captures 99.97% of particles
  • Replacement filters cost only $30 each

Levoit Core 400S

  • CADR nearly double the Core 300 across all categories
  • WiFi with Alexa and Google Assistant support
  • Real-time PM2.5 laser sensor with numeric display
  • Covers rooms up to 403 sq ft (2 ACH)
  • Lower energy consumption per cubic foot of air cleaned

Which One Is Right for You?

Choose Levoit Core 300 if...

You have a small room (bedroom, home office, nursery) under 220 square feet and want reliable HEPA filtration without spending more than you need to. The Core 300 is one of the best values in air purification, period. It is also the better choice if you prefer a simple, no-app, set-it-and-forget-it purifier.

Check Levoit Core 300 Price

Choose Levoit Core 400S if...

You need to cover a larger room, want to monitor your air quality from your phone, or plan to integrate with a smart home setup. The Core 400S delivers significantly more airflow, adds a real PM2.5 sensor, and its lower wattage per CFM of clean air makes it surprisingly efficient for its size.

Check Levoit Core 400S Price

Our Verdict

Winner: Levoit Core 400S

The Core 400S dominates on raw performance. Its CADR ratings are roughly 70% higher across the board, it covers rooms almost twice the size, and it adds WiFi control with a real-time PM2.5 sensor. That said, the Core 300 is not just a lesser version of the same purifier. At around $100, it delivers excellent filtration for bedrooms and small offices at a price point that is hard to argue with. If your room is under 220 square feet and you do not care about app control, the Core 300 saves you real money upfront and on energy bills. For anything larger, or if you want smart scheduling and air quality data, the Core 400S justifies the extra spend.

Check Levoit Core 300 Price Check Levoit Core 400S Price

5-Year Ownership Breakdown

Cost Levoit Core 300 Levoit Core 400S
Purchase Price $100 $190
Filters (5 years) $225 $225
Energy (5 years) $75 $95
Total (5 years) $400 $510

Related Comparisons

Coway Airmega 200M vs Levoit Core 400S: Which Wins? (2026)

Frequently Asked Questions

Is the Levoit Core 400S worth the upgrade over the Core 300?
It depends on your room size. If your space is under 220 square feet, the Core 300 handles it well and saves you $90 upfront. For rooms between 220 and 400 square feet, the Core 400S is worth the upgrade because its higher CADR will actually cycle the air fast enough to make a difference. The smart features are a bonus, not the main reason to upgrade.
Which Levoit is quieter, the Core 300 or Core 400S?
Both hit 24 dB on their lowest fan speed, which is quieter than a whisper. At maximum speed, the Core 300 is slightly louder at 56 dB compared to the Core 400S at 52 dB. In practice, you will run either on low or medium overnight, and both are bedroom-friendly at those settings.
How often do you replace filters on the Core 300 and Core 400S?
Levoit recommends replacing filters every 6 to 8 months on both models, depending on usage and air quality. The Core 300 filter costs about $30, and the Core 400S filter runs about $45. If you run them 24/7 in a dusty environment, lean toward the 6-month end.
Can the Levoit Core 300 handle allergies?
Yes. The Core 300 uses a True HEPA filter that captures 99.97% of particles down to 0.3 microns, including pollen, dust mites, and pet dander. For a single bedroom or small office, it provides excellent allergy relief. For larger spaces or whole-room coverage, step up to the Core 400S.
Does the Levoit Core 300 have an app or smart features?
No. The standard Core 300 is manual-only with physical buttons. If you want WiFi and app control in the same compact size, look at the Core 300S, which adds smart features to the Core 300 platform. The Core 400S includes smart features plus significantly more airflow.