Head to head
Alen BreatheSmart 75i Large Room Air Purifier vs Blueair Protect 7470i
Alen BreatheSmart 75i Large Room Air Purifier leads 4 to 1 on the 5 rankable specs, but Blueair Protect 7470i costs $100 less.
Catalog as of September 1, 2026
Why, in numbers
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Straight answer
Overall: 4 to 1
Buy the Alen BreatheSmart 75i Large Room Air Purifier.
- Leads 4 of 5 rankable overall specs; Blueair Protect 7470i takes 1.
- CADR: 350 CFM across Smoke, Dust, Pollen vs 270 CFM
- Coverage area: 1,400 sq ft vs 1,035 sq ft
- Blueair Protect 7470i is $100 cheaper. Pay the difference only if cadr matters to you.
Deal-breakers
tick what would make you walk away
- Trips:Alen BreatheSmart 75i Large Room Air Purifier · 27.0 lbTrips:Blueair Protect 7470i · 27.6 lb
At a glance
The handful of numbers that decide most purchases in this category.
CADR
Alen
350 CFM across Smoke, Dust, Pollen
Blueair
270 CFM (Smoke), 275 CFM (Dust), 280 CFM (Pollen)
Coverage area
Alen
1,400 sq ft (2 air changes/hr) / 700 sq ft (4 air changes/hr)
Blueair
1,035 sq ft (2 air changes/hr) / 418 sq ft (5 air changes/hr)
True 3-Year Cost of Ownership (TCO)
Alen BreatheSmart 75i Large Room Air Purifier
Blueair Protect 7470i
The 90-Day Owner Regret Check
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.
Blueair: What to watch for
- Maintenance
Requires periodic filter replacements to maintain airflow and odor capture.
Performance
leads 2-0| CADR | 350 CFM across Smoke, Dust, Pollen (wins this row: higher) | 270 CFM (Smoke), 275 CFM (Dust), 280 CFM (Pollen) |
|---|---|---|
| Room size | Large master suites, open living rooms, offices | Master bedrooms, living areas up to 418 sq ft (5 ACH) |
| Coverage area | 1,400 sq ft (2 air changes/hr) / 700 sq ft (4 air changes/hr) (wins this row: higher) | 1,035 sq ft (2 air changes/hr) / 418 sq ft (5 air changes/hr) |
Filters
leads 1-0| Filter types | Medical-grade H13 True HEPA + Antimicrobial layer + Heavy Odor Carbon | SmartFilter with Smart RFID chip (HEPASilent Ultra + Activated Carbon) |
|---|---|---|
| Filter life | 12–15 months extra long filter life (wins this row: higher) | 6–12 months with real-time algorithm filter tracking |
Usability & Smart
leads 1-0| Noise levels | 25 dB (WhisperMax) – 49 dB (Turbo speed) | 22 dB (Low) – 45 dB (High) (wins this row: lower) |
|---|---|---|
| Energy consumption | 45 W (Energy Star certified) | 43 W max power (Energy Star certified) |
| Smart features | Alen Air App (Wi-Fi), auto modes, color ring status | Blueair App, Alexa, Google Home, GermShield 24/7 background mode |
| Air quality sensors | Laser air quality sensor detecting fine particle levels with 5 color rings | Laser particle sensor (PM1, PM2.5, PM10), TVOC, Temp, Humidity |
Design & Ownership
leads 1-0| Weight | 27.0 lb (12.2 kg) (wins this row: lower) | 27.6 lb (12.5 kg) |
|---|---|---|
| Warranty | Lifetime warranty (with active filter subscription) | 5 years (with product registration) |
Which one should you buy
Pick this one if
Alen BreatheSmart 75i Large Room Air Purifier
Commercial-grade quiet purifier cleaning up to 1,400 sq ft every 30 minutes with a lifetime warranty.
- 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
What you give up
- High initial investment
- Tall tower profile
Pick this one if
Blueair Protect 7470i
HEPASilent Ultra smart air purifier with 24/7 GermShield bacterial protection and SpiralAir 360 vents.
- HEPASilent Ultra electrostatic + mechanical filtration kills 99% of germs
- SpiralAir omnidirectional airflow distributes clean air evenly
- Premium matte build with intuitive LCD air quality touchscreen
What you give up
- SmartFilter replacements are relatively costly
- Heavier metallic construction
Best for each use
Bedrooms
Tied on bedrooms. Blueair Protect 7470i is cheaper.
Big rooms & allergies
For big rooms & allergies, buy the Alen BreatheSmart 75i Large Room Air Purifier.
Low running cost
Too close to call on low running cost from the spec sheets. Only filter life is rankable here.
Done deciding?
Open the full standalone spec sheet for either device.
Manufacturer pages: Alen BreatheSmart 75i Large Room Air Purifier ↗ · Blueair Protect 7470i ↗
Common questions
Which is cheaper, the Alen BreatheSmart 75i Large Room Air Purifier or the Blueair Protect 7470i?
Blueair Protect 7470i costs $100 less at list price.
What is the biggest catch with the Alen BreatheSmart 75i Large Room Air Purifier or Blueair Protect 7470i?
Both has this deal-breaker: over 25 lb (11 kg). Hard to move between rooms.
Which is better for bedrooms, the Alen BreatheSmart 75i Large Room Air Purifier or the Blueair Protect 7470i?
Tied on bedrooms. Blueair Protect 7470i is cheaper. The 2 rankable bedrooms specs split 1 to 1. Saves $100 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.