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 Honeywell HPA300 HEPA Air Purifier
Find the differences that matter for your next decision.
Honeywell
Honeywell HPA300 HEPA Air Purifier
Air purifiers
$249List 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 4 of 5 rankable overall specs; Honeywell HPA300 HEPA Air Purifier takes 1.
- CADR: 350 CFM across Smoke, Dust, Pollen vs 300 CFM
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 465 sq ft
Honeywell HPA300 HEPA Air Purifier is $500 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 | Honeywell HPA300 HEPA Air Purifier |
|---|---|---|
| CADRPerformance | 350 CFM across Smoke, Dust, Pollen | 300 CFM (Smoke), 320 CFM (Dust), 300 CFM (Pollen) |
| Room sizePerformance | Large master suites, open living rooms, offices | Extra large rooms, master suites, open spaces up to 465 sq ft (4.8 ACH) |
| Coverage areaPerformance | 1,400 sq ft (2 air changes/hr) / 700 sq ft (4 air changes/hr) | 465 sq ft (4.8 air changes/hr) / 2,250 sq ft (1 air change/hr) |
| Filter typesFilters | Medical-grade H13 True HEPA + Antimicrobial layer + Heavy Odor Carbon | Type A Activated Carbon Pre-filter + 3× Type R True HEPA filters |
| Filter lifeFilters | 12–15 months extra long filter life | 3 months (Pre-filter) / 12 months (True HEPA filters) |
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
Honeywell HPA300 HEPA Air Purifier
Reasons to choose it
- Powerful high-volume CADR (300+ CFM) for large rooms up to 465 sq ft
- Certified True HEPA captures 99.97% of airborne particles
- Durable workhorse build with touch-button controls
Worth considering
- High power consumption (up to 130W on Turbo)
- No Wi-Fi app or smart automated air quality sensors
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
Honeywell HPA300 HEPA Air Purifier
3-Year Estimated Total$444
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
Honeywell
Front grille intake: can back up close to baseboards
Nighttime Sleep Mode Noise
Alen
Standard sleep speed
Honeywell
30 dB lowest fan speed (noticeable background white noise)
Unit Footprint & Dimensions
Alen
Standard room purifier footprint
Honeywell
Large commercial-grade shell (20.8 × 22.3 × 10.8 in; 17.0 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.
Honeywell: 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 Honeywell HPA300 HEPA Air Purifier?
Honeywell HPA300 HEPA Air Purifier costs $500 less at list price.
What is the biggest catch with the Alen BreatheSmart 75i Large Room Air Purifier or Honeywell HPA300 HEPA Air Purifier?
Honeywell HPA300 HEPA Air Purifier has this deal-breaker: over 55 dB on high. Louder than normal conversation at full speed.
Which is better for bedrooms, the Alen BreatheSmart 75i Large Room Air Purifier or the Honeywell HPA300 HEPA Air Purifier?
Tied on bedrooms. Honeywell HPA300 HEPA Air Purifier is cheaper. The 2 rankable bedrooms specs split 1 to 1. Saves $500 at list price.
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.