Blueair
Blueair Protect 7470i
Air purifiers
$649List price
Explore this product Your shortlist, side by side
Blueair Protect 7470i vs Coway Airmega 400
Find the differences that matter for your next decision.
Coway
Coway Airmega 400
Air purifiers
$549List 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 Coway Airmega 400.
- Leads 3 of 3 rankable overall specs.
- CADR: 350 CFM vs 270 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: 1,560 sq ft vs 1,035 sq ft
It is also $100 cheaper.
The trade-off to know
Check first: the Coway Airmega 400 has no Wi-Fi app. 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 | Blueair Protect 7470i | Coway Airmega 400 |
|---|---|---|
| CADRPerformance | 270 CFM (Smoke), 275 CFM (Dust), 280 CFM (Pollen) | 350 CFM (Smoke), 328 CFM (Dust), 400 CFM (Pollen) |
| Room sizePerformance | Master bedrooms, living areas up to 418 sq ft (5 ACH) | Large living rooms, open floor plans, offices |
| Coverage areaPerformance | 1,035 sq ft (2 air changes/hr) / 418 sq ft (5 air changes/hr) | 1,560 sq ft (2 air changes/hr) / 780 sq ft (4 air changes/hr) |
| Filter typesFilters | SmartFilter with Smart RFID chip (HEPASilent Ultra + Activated Carbon) | Washable Pre-filter + Max2 Filter (True HEPA + Activated Carbon) |
| Filter lifeFilters | 6–12 months with real-time algorithm filter tracking | 12 months (Max2 filter) / Washable pre-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.
Blueair Protect 7470i
Reasons to choose it
- 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
Worth considering
- SmartFilter replacements are relatively costly
- Heavier metallic construction
Coway Airmega 400
Reasons to choose it
- Massive CADR cleans up to 1,560 sq ft twice per hour
- Dual-sided air intake with combined True HEPA and carbon filters
- Smart Eco mode turns off fan when air remains clean for 30 minutes
Worth considering
- Cube design has a large floor footprint
- No mobile app connectivity on the non-S model
Beyond the spec sheet
Living with your choice.
Explore the ownership details available for this pair.
What three years could cost
Blueair Protect 7470i
3-Year Estimated Total$889
Coway Airmega 400
3-Year Estimated Total$819
Everyday ownership notes
Documented ergonomic quirks, hardware annoyances, and maintenance realities reported by real owners.
Blueair: What to watch for
- Maintenance
Requires periodic filter replacements to maintain airflow and odor capture.
Coway: 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 Blueair Protect 7470i or the Coway Airmega 400?
Coway Airmega 400 costs $100 less at list price.
What is the biggest catch with the Blueair Protect 7470i or Coway Airmega 400?
Coway Airmega 400 has this deal-breaker: no Wi-Fi app. No schedules or remote control from your phone.
Which is better for bedrooms, the Blueair Protect 7470i or the Coway Airmega 400?
Too close to call on bedrooms from the spec sheets. Only weight is rankable here. Noise levels: 22 dB vs 22 dB Smart features: Blueair App, Alexa, Google Home, GermShield… vs Smart Auto Mode + Eco Mode
What cannot be compared from spec sheets?
Of the 11 specs tracked here, 8 are descriptive and cannot be ranked on numbers alone. Spec sheets also cannot measure subjective factors like build quality, real-world performance, or comfort.