Coway Airmega 100 (White) vs Blueair Blue Pure 511i Max (White/Slate)
Which model fits the intended room at a comparable air-change rate, and which control and filter-care routine suits the household?
Products compared
ASIN B0CDKHKBHD
Coway Airmega 100 (White)
Your room fits the Coway’s estimated roughly 169 sq ft at 4.8 ACH, with margin for layout.
Last observed offer
$119.99
List Price: $129.99
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Size: 8.66 x 8.66 x 15.55
Price checked
Observed condition: new. Coupon and subscription requirements unverified.
ASIN B08KPJ76RR
Blueair Blue Pure 511i Max (White/Slate)
You need the manufacturer-listed 237 sq ft at 4.8 ACH, subject to room conditions.
Last observed offer
$112.99
List Price: $139.99
- Confirm offer eligibility on Amazon
Size: Small
Price checked
Observed condition: new. Coupon and subscription requirements unverified.
Prices are per listed package. Pickoryx may earn a commission from qualifying purchases through the paid Amazon links on this page, at no added cost to you.
Published by Pickoryx · Published 2026-10-08 · Source checked 2026-10-08 18:00 UTC
The main trade-off
Coway’s area at a matched rate is an estimate below Blueair’s listed 4.8-ACH area; their documented controls and pre-filter routines also differ.
Quick verdict
These compact purifiers suit different room-size targets and care routines. Coway’s 405 sq ft rating is at 2 ACH; normalized to Blueair’s 4.8 ACH, it is about 169 sq ft. Blueair lists 237 sq ft at 4.8 ACH. The Coway value is a screening estimate, not a direct test.
Choose Coway Airmega 100 (White) if
- Your room fits the Coway’s estimated roughly 169 sq ft at 4.8 ACH, with margin for layout.
- You prefer documented on-unit Auto/speed controls and a vacuumable pre-filter.
Choose Blueair Blue Pure 511i Max (White/Slate) if
- You need the manufacturer-listed 237 sq ft at 4.8 ACH, subject to room conditions.
- You value documented app controls/filter tracking or a washable fabric pre-filter.
When the recommendation changes
- Recalculate for the actual room and desired ACH; Coway’s 4.8-ACH area is normalized from its 2-ACH rating.
- If you require independently measured comparison of CADR, noise or real-room performance, consult a source testing both exact models.
The differences that matter
| Decision point | Coway Airmega 100 (White) | Blueair Blue Pure 511i Max (White/Slate) |
|---|---|---|
| Room Fit At Comparable Air Changes | Coway lists 405 sq ft at 2 ACH. Proportional normalization to 4.8 ACH gives an estimated 169 sq ft (405 x 2 / 4.8); this is a calculation, not a separately rated Coway figure. Body: 8.7 x 15.6 x 8.7 in.[1] | Blueair lists 237 sq ft at 4.8 ACH and a 14.5 x 9.3 x 9.3 in body.[3] |
What this changes: Compare at the same stated 4.8 air changes per hour, not Coway’s larger 1-ACH figure. Its normalized estimate is smaller than Blueair’s listed area; use it as a screening calculation and allow room-layout margin.[1, 3] The better fit depends on your priorities | ||
| Controls And Filter Care | Coway documents on-unit Auto, speed 1/2/3 and a PM2.5 sensor. Its 3-in-1 filter includes a vacuumable pre-filter, with a stated one-year filter life.[1, 2] | Blueair documents Auto, Night and speed controls, Wi-Fi/app control and filter-life tracking. Its fabric pre-filter is washable; the manual says replace the main filter when its red indicator appears. Blueair states up to nine months for the main filter.[3, 4, 5] |
What this changes: Choose the workflow that suits your routine: Coway documents on-unit operation and a vacuumable pre-filter with a longer stated interval; Blueair documents app control/tracking and a washable fabric pre-filter with indicator-led main-filter replacement. Stated intervals are guidance, not guaranteed service life.[1, 2, 3, 4, 5] The better fit depends on your priorities | ||
Best for your routine
A room within Coway’s estimated 4.8-ACH area where on-unit controls and vacuumable pre-filter care are preferred
Best fit: Coway Airmega 100 (White)
Based on listed features, not comparative testing.
Coway’s listed 405 sq ft at 2 ACH normalizes to about 169 sq ft at 4.8 ACH, and the manufacturer documents its on-unit controls and vacuumable pre-filter.
A room needing Blueair’s listed 237 sq ft at 4.8 ACH or a household wanting app control and filter tracking
Best fit: Blueair Blue Pure 511i Max (White/Slate)
Based on listed features, not comparative testing.
Blueair lists 237 sq ft at 4.8 ACH and documents app controls and filter-life tracking.
Value and trade-offs
One or both observed offers have eligibility conditions, so no unrestricted price difference is shown.
Observed offers may change. Compare checkout prices and replacement-filter availability; no lifetime-cost winner is established.
Price history is unavailable, so purchase timing is not assessed.
Limitations
- Coway’s 4.8-ACH area is a proportional normalization of its 2-ACH rating, not a product-page rating or controlled head-to-head measurement.
- Room coverage depends on room shape, ceiling height, placement and conditions; leave margin and confirm the room-size convention.
- Manufacturer filter intervals are guidance; actual replacement timing varies. Filter prices and long-term ownership cost were not established.
- Coway’s reviewed US product page documents on-unit controls; app or Wi-Fi capability was not confirmed in reviewed sources.
- No independent side-by-side performance, noise, health-outcome or reliability evidence was used to name a winner.
- Blueair’s manual is hosted in its Canada content library and identifies model 3132111100; regional bundle and warranty terms are not inferred.
Questions shoppers ask
How large a room can each cover at 4.8 ACH?
Blueair lists 237 sq ft at 4.8 ACH. Coway lists 405 sq ft at 2 ACH; proportional normalization gives about 169 sq ft at 4.8 ACH (405 x 2 / 4.8). Treat Coway’s figure as a screening estimate, not a separately rated coverage claim.
Which has app controls and what does filter care involve?
Blueair documents Wi-Fi/app control and filter-life tracking, plus a washable fabric pre-filter and indicator-led main-filter replacement. Coway documents on-unit Auto/speed controls and a vacuumable pre-filter with a stated one-year interval. Check replacement-filter fit and availability before buying.
Methodology and sources
Compared US-facing product pages and the Blue Pure 511i Max manual. Normalized Coway’s listed 405 sq ft at 2 ACH proportionally to 4.8 ACH, the rate shown for Blueair; this is not a measured comparison. Compared documented controls and filter-care steps.
This comparison summarizes published manufacturer specifications and care instructions; it does not report hands-on testing.
View 5 sources
- 1.Airmega 100 Air PurifierCowaymega · Official specifications · Source checked 2026-10-08 18:00 UTC
Evidence used on this page
- Product specifications: room coverage/ACH, CADR, controls/sensor, dimensions and filter details.: Lists 405 sq ft at 2 ACH, 810 sq ft at 1 ACH, smoke CADR 108, Auto/1/2/3 and PM2.5 sensor, vacuumable pre-filter, stated one-year filter life, 8.7 x 15.6 x 8.7 in.
- 2.Airmega 100 Replacement FilterCowaymega · Official specifications · Source checked 2026-10-08 18:00 UTC
Evidence used on this page
- Filter construction and maintenance description.: Describes combined pre-filter, HEPA and deodorization filter, vacuumable pre-filter and 12-month stated life.
- 3.Blue Pure 511i Max Air PurifierBlueair · Official specifications · Source checked 2026-10-08 18:00 UTC
Evidence used on this page
- Product overview and room-size, technical specifications, controls and filter details.: Lists 237 sq ft at 4.8 ACH, Auto/Night/speed, Wi-Fi/app and filter-life tracking, dimensions 14.5 x 9.3 x 9.3 in, up to nine months for the main filter.
- 4.Blue Pure 511i Max User ManualBlueair · Official support · Source checked 2026-10-08 18:00 UTC
Evidence used on this page
- English section: product/model identification, product map, cleaning and filter replacement instructions.: Names Blue Pure 511i Max model 3132111100; shows washable fabric pre-filter, particle/carbon filter and PM2.5 sensor; instructs vacuuming the purifier/pre-filter exterior, machine-washing the fabric pre-filter and replacing the main filter when the red indicator appears.
- 5.Blue Pure 511i Max Fabric Pre-filterBlueair · Official specifications · Source checked 2026-10-08 18:00 UTC
Evidence used on this page
- Compatibility and washable fabric pre-filter description.: Identifies this washable fabric pre-filter as compatible with Blue Pure 511i Max.