Blueair
Blueair Protect 7470i
Air purifiers
$649List price
Explore this product Your shortlist, side by side
Blueair Protect 7470i vs Coway Airmega 250
Find the differences that matter for your next decision.
Coway
Coway Airmega 250
Air purifiers
$399List 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 Blueair Protect 7470i.
- Leads 2 of 3 rankable overall specs; Coway Airmega 250 takes 1.
- CADR: 270 CFM vs 249 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: 1,035 sq ft vs 930 sq ft
Coway Airmega 250 is $250 cheaper. Pay the difference only if cadr matters to you.
The trade-off to know
Check first: the Blueair Protect 7470i 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 | Blueair Protect 7470i | Coway Airmega 250 |
|---|---|---|
| CADRPerformance | 270 CFM (Smoke), 275 CFM (Dust), 280 CFM (Pollen) | 249 CFM (Smoke), 261 CFM (Dust), 230 CFM (Pollen) |
| Room sizePerformance | Master bedrooms, living areas up to 418 sq ft (5 ACH) | Large bedrooms, apartments, living rooms, and open layouts up to 930 sq ft |
| Coverage areaPerformance | 1,035 sq ft (2 air changes/hr) / 418 sq ft (5 air changes/hr) | 930 sq ft (2 air changes/hr) / 465 sq ft (4 air changes/hr) |
| Filter typesFilters | SmartFilter with Smart RFID chip (HEPASilent Ultra + Activated Carbon) | EZ-clean Washable Pre-filter + Max2 Green True HEPA and Activated Carbon filter |
| Filter lifeFilters | 6–12 months with real-time algorithm filter tracking | 12 months (Max2 filter) / Washable slide-out pre-filter |
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 250
Reasons to choose it
- Green True HEPA filter captures 99.999% of 0.01-micron ultrafine particles and neutralizes odors
- Easy-to-clean EZ-pull front pre-filter slides out from the top without opening the machine
- Covers up to 930 sq ft with Smart Auto Mode and real-time PM2.5 particle sensor LED ring
Worth considering
- No Wi-Fi app connectivity on the standard 250 model (app available on 250S variant)
- Substantial 20.5 lb weight
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 250
3-Year Estimated Total$564
Room Placement & Bedroom Noise Check
Physical clearance required for airflow, wall placement, and bedroom noise levels.
Wall Clearance Required
Blueair
Requires 12 in perimeter airflow space
Coway
Bottom & dual-side intake: sits flush against back wall
Nighttime Sleep Mode Noise
Blueair
Standard sleep speed
Coway
22 dB sleep mode with auto-dimming LED light sensor
Unit Footprint & Dimensions
Blueair
Standard room purifier footprint
Coway
Modern slim tower (19.7 × 18.5 × 8.3 in; 20.5 lb)
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 250?
Coway Airmega 250 costs $250 less at list price.
What is the biggest catch with the Blueair Protect 7470i or Coway Airmega 250?
Coway Airmega 250 has this deal-breaker: under 1,000 sq ft coverage. Undersized for an open-plan living area.
Which is better for bedrooms, the Blueair Protect 7470i or the Coway Airmega 250?
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, Rapid Mode, Eco Mode, and…
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.