Levoit
Levoit Core 400S
Air purifiers
$219List price
Explore this product Your shortlist, side by side
Levoit Core 400S vs Blueair Blue Pure 311i Max
Find the differences that matter for your next decision.
Blueair
Blueair Blue Pure 311i Max
Air purifiers
$229List price
Explore this product What matters most to you?
Start with all rankable specifications, or focus on a particular use.
Your starting point
Tied overall. Levoit Core 400S is cheaper.
- The 4 rankable overall specs split 2 to 2.
- Saves $10 at list price.
How we reached this
We compare the published specifications relevant to your priority. Each rankable specification counts once; your selected requirements can rule a product out. This is a guide to the numbers, not a laboratory performance score.
The trade-off to know
Levoit Core 400S: Coverage is sized for medium bedrooms and living rooms (under 1,000 sq ft)
Look at the differences ↓Refine your requirements
What would rule one out?
Side by side
The differences, in detail.
Start with the key specs, then explore as much as you need.
| What you’re comparing | Levoit Core 400S | Blueair Blue Pure 311i Max |
|---|---|---|
| CADRPerformance | 260 CFM / 442 m³/h (Smoke), 260 CFM (Dust), 260 CFM (Pollen) | 250 CFM (Smoke), 250 CFM (Dust), 250 CFM (Pollen) |
| Room sizePerformance | Bedrooms, apartments, mid-size living spaces | Medium to large bedrooms, living rooms, and open offices up to 387 sq ft (4.8 ACH) / 929 sq ft (2 ACH) |
| Coverage areaPerformance | 403 sq ft (5 air changes/hr) / 990 sq ft (2 air changes/hr) | 387 sq ft (4.8 air changes/hr) / 929 sq ft (2 air changes/hr) |
| Filter typesFilters | 3-Stage: Nylon Pre-filter + H13 True HEPA + High-Efficiency Activated Carbon | HEPASilent Main Particle + Carbon filter with customizable machine-washable fabric pre-filter |
| Filter lifeFilters | 6–12 months | 6 to 9 months (tracked by RealTrack algorithm in app) |
Showing 5 of 11 specifications. Missing values stay unlisted. About the sources
Both sides of the decision
What you gain. What you give up.
Levoit Core 400S
Reasons to choose it
- Whisper-quiet 24 dB sleep mode with completely dimmable light display
- AirSight Plus laser sensor provides real-time PM2.5 numerical readings
- VeSync smartphone app with scheduling, filter life tracking, and voice control
Worth considering
- Coverage is sized for medium bedrooms and living rooms (under 1,000 sq ft)
- Activated carbon layer is a coated sheet rather than heavy pellet bed
Blueair Blue Pure 311i Max
Reasons to choose it
- HEPASilent dual filtration combines electrostatic and mechanical filtration for faster airflow at lower noise
- Cleans up to 387 sq ft in 12.5 minutes (4.8 ACH) / up to 929 sq ft in 30 minutes (2 ACH)
- Ultra-quiet 23dB Night Mode with Energy Star certified low electricity draw
Worth considering
- Fabric pre-filter covers the exterior and requires periodic vacuuming/washing
- Filter replacements needed every 6 to 9 months
Beyond the spec sheet
Living with your choice.
Explore the ownership details available for this pair.
What three years could cost
The longer-term difference: While the Levoit is cheaper upfront, the Blueair saves $20 over 3 years due to lower consumable & maintenance costs.
Levoit Core 400S
3-Year Estimated Total$354
Blueair Blue Pure 311i Max
3-Year Estimated Total$334
Room Placement & Bedroom Noise Check
Physical clearance required for airflow, wall placement, and bedroom noise levels.
Wall Clearance Required
Levoit
360° intake requires 15 in perimeter clearance from walls
Blueair
360° fabric pre-filter intake (needs 12 in wall space)
Nighttime Sleep Mode Noise
Levoit
24 dB quiet sleep mode
Blueair
23 dB lowest speed setting
Unit Footprint & Dimensions
Levoit
Mid-sized cylinder (10.8 × 10.8 × 20.5 in; 11.0 lb)
Blueair
Cylindrical aesthetic (12.4 × 12.4 × 18.9 in; 7.8 lb)
Everyday ownership notes
Documented ergonomic quirks, hardware annoyances, and maintenance realities reported by real owners.
Levoit: What to watch for
- Maintenance
Requires periodic filter replacements to maintain airflow and odor capture.
Blueair: What to watch for
- Maintenance
Outer fabric pre-filter attracts visible pet fur and lint.
Know what’s behind the comparison
Published specs. Visible sources.
Clinchmark compares manufacturer specifications and other published information. We have not independently lab-tested these products. Editorial assessments and unknown values are identified in the specification details.
Catalog snapshot: September 1, 2026. Prices, availability, and provider terms can change.
Still weighing it up?
Which is cheaper, the Levoit Core 400S or the Blueair Blue Pure 311i Max?
Levoit Core 400S costs $10 less at list price.
What is the biggest catch with the Levoit Core 400S or Blueair Blue Pure 311i Max?
Both has this deal-breaker: under 1,000 sq ft coverage. Undersized for an open-plan living area.
Which is better for bedrooms, the Levoit Core 400S or the Blueair Blue Pure 311i Max?
For bedrooms, buy the Blueair Blue Pure 311i Max. Leads 2 of 2 rankable bedrooms specs. Noise levels: 23 dB vs 24 dB
What cannot be compared from spec sheets?
Of the 11 specs tracked here, 7 are descriptive and cannot be ranked on numbers alone. Spec sheets also cannot measure subjective factors like build quality, real-world performance, or comfort.