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Blueair Blue Signature Medium vs. Coway Airmega 150 compared

Air Purifier

At a glance

The key numbers for both devices side by side.

Overall rating
75Gut
77Gut
Value for money
62Fair
68Fair
Best price
€299.00
€179.98€299.99−40 %
Price advantage
—
€119.02 cheaper
Offers
1 shop
3 shops
Rank in category
Rank 25 of 54
Rank 22 of 54

Specs

Specs compared

Key specs

Model
Blue Signature Medium
Airmega 150
CADR particlesClean air delivered per hour for particles according to the manufacturer in m³/h – the most important performance figure; the room size is calculated from it
545.4 m³/h
281 m³/h
Room size up toCalculated from the CADR: CADR ÷ 12.5, rounded to whole m² (five air changes per hour at a 2.5 m ceiling height) – this makes all units comparable, as manufacturer figures often assume only one air change; leave blank if there is no CADR
44 m² (474 sq ft)
22 m² (237 sq ft)
Filter classClass of the main filter per EN 1822 according to the manufacturer (ISO 29463: ISO 35 H = H13, ISO 45 H = H14) – H13 and H14 retain fine dust and pollen almost completely; “True HEPA” or “HEPA-type” without a class counts as “HEPA, no class stated”
HEPA, no class stated
HEPA, no class stated
Noise level at lowest settingNoise at the lowest setting (night mode) according to the manufacturer in dB – important for the bedroom
19 dB
20 dB
Filter costCost of replacement filters per year at the manufacturer’s replacement interval in € – over the years often more than the purchase price
49.99 €/year

Filters & air

Filter change everyReplacement interval of the main filter according to the manufacturer in months
12 months
12 months
Activated carbon filterAccording to the manufacturer, an activated carbon filter traps odors and gases – important for cooking fumes, smoke and pets
Yes
Yes
SensorsWhich air values the unit measures according to the manufacturer – with a sensor, it adjusts itself in auto mode; leave blank if there is no sensor
Gases (VOC)
PM2.5 particles
Air quality indicatorHow the unit shows the measured air quality according to the manufacturer – as a color ring or with a reading (e.g. PM2.5) on the display
Reading on display
Color indicator
IonizerIon, plasma or “active oxygen” technology according to the manufacturer – it can produce ozone, so being able to switch it off is better
Ionizer cannot be turned off
No ionizer
UV sterilizationUV-C lamp inside the unit for sterilization according to the manufacturer
No
No
360° air intakeAccording to the manufacturer, draws in air from all sides – the unit can stand freely in the room instead of against the wall
No
Filter change indicatorAccording to the manufacturer, indicates when the filter needs to be replaced
Yes
Yes
ECARF sealCertified as allergy-friendly by the European Foundation for Allergy Research (ECARF)
Yes

Consumption & noise

Noise level at highest settingNoise at the highest setting according to the manufacturer in dB – this is where the unit reaches its CADR
54 dB
55.6 dB
Power consumptionPower consumption at the highest setting according to the manufacturer in W
36 W
35 W
Standby consumptionPower consumption in standby according to the manufacturer in W – usually slightly higher with Wi-Fi
0.96 W
0.2 W

Controls & comfort

Fan speedsNumber of manually adjustable fan speeds according to the manufacturer, excluding auto and night mode
4 levels
3 levels
Night modeDedicated night mode according to the manufacturer: quietest setting, dimmed or switched-off display
Yes
Yes
Display shut-offAccording to the manufacturer, the display and lights can be dimmed or switched off completely – important in the bedroom
Yes
Yes
Child lockButton lock according to the manufacturer
Yes
No
Remote controlRemote control included according to the manufacturer
No
Smart homeWhat the unit can be controlled with according to the manufacturer – leave blank if there is no app
Manufacturer appAlexaGoogle Assistant

Features & dimensions

WeightWeight according to the manufacturer in kg – important if the unit moves between rooms
4.3 kg (9.5 lb)
5.5 kg (12 lb)
Dimensions (W × D × H)Width × depth × height according to the manufacturer in cm – e.g. “27 × 27 × 52 cm”
29.7 × 29.7 × 49 cm (12 × 12 × 19 in)
16.5 × 34 × 46.9 cm (6.5 × 13 × 18 in)

General

Warranty
1 years
3 years
Price segment
Premium
Model year
2025
In the box
Luftreiniger, Vorfilter in Standardfarbe
Luftreiniger, 1 HEPA-Filterset

Prices

Offers

Blueair Blue Signature Medium

Coway Airmega 150

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Verdict

Pros & cons

Der Blueair Blue Signature Medium ist ein Luftreiniger und Beistelltisch zugleich. Mit 545 m³/h CADR reinigt er Wohnzimmer von 25 bis 35 m² zügig und braucht dabei nur 36 W. Der Haken: Der Ionisator lässt sich nicht abschalten, und die leiseste Stufe ist lauter als die angegebenen 19 dB. Für ein kleines Schlafzimmer zahlst du für Leistung, die du dort nicht brauchst.

Pros

  • 545 m³/h CADR reichen für Wohnzimmer von 25 bis 35 m² mit Reserve
  • Dient mit glatter Deckplatte als Beistelltisch neben Sofa oder Sessel
  • Sparsam: rund 110 kWh im Jahr bei acht Stunden Volllast täglich
  • Filterwechsel ohne Werkzeug in wenigen Minuten
  • App mit Zeitplänen, Luftwerte-Verlauf, Alexa und Google Assistant
  • Mit 4,3 kg leicht von Raum zu Raum zu tragen

Cons

  • Ionisator weder am Gerät noch per App abschaltbar
  • Leiseste Stufe deutlich lauter als die angegebenen 19 dB
  • Ersatzfilterring ist der größte laufende Kostenfaktor
  • Matte Deckplatte bekommt schon früh feine Kratzer
  • Clip am neuen Filterring schließt nur fummelig

Der Coway Airmega 150 ist ein schlichter Luftreiniger für Schlaf- und Arbeitszimmer bis etwa 22 m², der Feinstaub zuverlässig herausfiltert und im Silent-Modus nur 2,6 W braucht. App, Fernbedienung und Timer fehlen, die Automatik regelt über den Feinstaubsensor. Der Haken: Bei einem Teil der Geräte setzt nach einigen Tagen ein hörbares Motorbrummen ein, das gerade nachts stört.

Pros

  • Senkt PM2,5 in 18 m² binnen einer Stunde von 110 auf 7,1 µg/m³
  • Silent-Modus mit 35 bis 40 dB nachts kaum hörbar
  • Sehr sparsam: 2,6 W im Silent-Modus, 0,2 W im Standby
  • Ein Filterset pro Jahr, Aktivkohle in der EU-Version als Granulat
  • Automatik reagiert über PM2,5-Sensor auf Kochen und Deo
  • Ohne Ionisator, also keine Ozonbildung

Cons

  • Bei einem Teil der Geräte Motorbrummen nach einigen Tagen
  • Keine App, keine Fernbedienung, kein Timer
  • Statusleuchte bleibt an, Gerät wird nie ganz dunkel
  • Versprochene 20 dB im Schlafmodus real 35 bis 40 dB
  • Kein Griff, Standfüße ohne Gummierung

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