Alen
Alen BreatheSmart 75i Large Room Air Purifier
Air purifiers
$749List price
Explore this product Your shortlist, side by side
Alen BreatheSmart 75i Large Room Air Purifier vs Levoit Core 400S
Find the differences that matter for your next decision.
Levoit
Levoit Core 400S
Air purifiers
$219List price
Explore this product What matters most to you?
Start with all rankable specifications, or focus on a particular use.
Your starting point
Buy the Alen BreatheSmart 75i Large Room Air Purifier.
- Leads 3 of 5 rankable overall specs; Levoit Core 400S takes 2.
- CADR: 350 CFM across Smoke, Dust, Pollen vs 260 CFM / 442 m³/h
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.
Coverage area: 1,400 sq ft vs 403 sq ft
Levoit Core 400S is $530 cheaper. Pay the difference only if cadr matters to you.
The trade-off to know
Check first: the Alen BreatheSmart 75i Large Room Air Purifier weighs over 25 lb (11 kg). Tick them under deal-breakers if that rules it out.
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 | Alen BreatheSmart 75i Large Room Air Purifier | Levoit Core 400S |
|---|---|---|
| CADRPerformance | 350 CFM across Smoke, Dust, Pollen | 260 CFM / 442 m³/h (Smoke), 260 CFM (Dust), 260 CFM (Pollen) |
| Room sizePerformance | Large master suites, open living rooms, offices | Bedrooms, apartments, mid-size living spaces |
| Coverage areaPerformance | 1,400 sq ft (2 air changes/hr) / 700 sq ft (4 air changes/hr) | 403 sq ft (5 air changes/hr) / 990 sq ft (2 air changes/hr) |
| Filter typesFilters | Medical-grade H13 True HEPA + Antimicrobial layer + Heavy Odor Carbon | 3-Stage: Nylon Pre-filter + H13 True HEPA + High-Efficiency Activated Carbon |
| Filter lifeFilters | 12–15 months extra long filter life | 6–12 months |
Showing 5 of 11 specifications. Missing values stay unlisted. About the sources
Both sides of the decision
What you gain. What you give up.
Alen BreatheSmart 75i Large Room Air Purifier
Reasons to choose it
- Industry-exclusive transferable Lifetime Warranty
- Tuned pink noise frequencies promote deeper sleep on WhisperMax mode
- Medical-grade H13 True HEPA filter lasts up to 15 months
Worth considering
- High initial investment
- Tall tower profile
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
Beyond the spec sheet
Living with your choice.
Explore the ownership details available for this pair.
What three years could cost
Alen BreatheSmart 75i Large Room Air Purifier
3-Year Estimated Total$1,046
Levoit Core 400S
3-Year Estimated Total$354
Room Placement & Bedroom Noise Check
Physical clearance required for airflow, wall placement, and bedroom noise levels.
Wall Clearance Required
Alen
Requires 12 in perimeter airflow space
Levoit
360° intake requires 15 in perimeter clearance from walls
Nighttime Sleep Mode Noise
Alen
Standard sleep speed
Levoit
24 dB quiet sleep mode
Unit Footprint & Dimensions
Alen
Standard room purifier footprint
Levoit
Mid-sized cylinder (10.8 × 10.8 × 20.5 in; 11.0 lb)
Everyday ownership notes
Documented ergonomic quirks, hardware annoyances, and maintenance realities reported by real owners.
Alen: What to watch for
- Maintenance
Requires periodic filter replacements to maintain airflow and odor capture.
Levoit: What to watch for
- Maintenance
Requires periodic filter replacements to maintain airflow and odor capture.
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 Alen BreatheSmart 75i Large Room Air Purifier or the Levoit Core 400S?
Levoit Core 400S costs $530 less at list price.
What is the biggest catch with the Alen BreatheSmart 75i Large Room Air Purifier or Levoit Core 400S?
Levoit Core 400S has this deal-breaker: under 1,000 sq ft coverage. Undersized for an open-plan living area.
Which is better for bedrooms, the Alen BreatheSmart 75i Large Room Air Purifier or the Levoit Core 400S?
For bedrooms, buy the Levoit Core 400S. Leads 2 of 2 rankable bedrooms specs. Noise levels: 24 dB vs 25 dB
What cannot be compared from spec sheets?
Of the 11 specs tracked here, 6 are descriptive and cannot be ranked on numbers alone. Spec sheets also cannot measure subjective factors like build quality, real-world performance, or comfort.