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Bosch Air 4000 vs. Xiaomi Smart Air Purifier Elite compared

Air Purifier

At a glance

The key numbers for both devices side by side.

Overall rating
71Solide
71Solide
Value for money
57Okay
50Okay
Best price
€196.20
€304.90
Price advantage
€108.70 cheaper
—
Offers
1 shop
1 shop
Rank in category
Rank 35 of 54
Rank 36 of 54

Rating

Sub-ratings compared

Bosch Air 4000Overall rating 71Xiaomi Smart Air Purifier EliteOverall rating 71
CleaningperformanceNoise levelAutomode & sensorsRunningcosts & consumptionEaseof use & build quality
Bosch Air 4000Xiaomi Smart Air Purifier Elite
Cleaning performance70/10078/100
Noise level78/10070/100
Auto mode & sensors70/10055/100
Running costs & consumption70/10072/100
Ease of use & build quality67/10068/100
Cleaning performance
70
78
Noise level
78
70
Auto mode & sensors
70
55
Running costs & consumption
70
72
Ease of use & build quality
67
68

Specs

Specs compared

Key specs

Brand
Bosch
Xiaomi
Model
Air 4000
Smart Air Purifier Elite
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
300 m³/h
600 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
24 m² (258 sq ft)
48 m² (517 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”
H13 (HEPA)
H13 (HEPA)
Noise level at lowest settingNoise at the lowest setting (night mode) according to the manufacturer in dB – important for the bedroom
25 dB
20.2 dB
Filter costCost of replacement filters per year at the manufacturer’s replacement interval in € – over the years often more than the purchase price
65 €/year

Filters & air

Filter change everyReplacement interval of the main filter according to the manufacturer in months
10 months
Activated carbon filterAccording to the manufacturer, an activated carbon filter traps odors and gases – important for cooking fumes, smoke and pets
Yes
Yes
CADR gases (formaldehyde)Clean air delivered per hour for formaldehyde according to the manufacturer in m³/h – shows how well the activated carbon filter traps gases
135 m³/h
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
PM2.5 particles
PM2.5 particlesPM10 particlesTemperatureHumidity
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
Color indicator
Reading on display
IonizerIon, plasma or “active oxygen” technology according to the manufacturer – it can produce ozone, so being able to switch it off is better
No ionizer
Ionizer can be turned off
UV sterilizationUV-C lamp inside the unit for sterilization according to the manufacturer
No
Yes
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
Yes
Filter change indicatorAccording to the manufacturer, indicates when the filter needs to be replaced
Yes
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
49 dB
68 dB
Power consumptionPower consumption at the highest setting according to the manufacturer in W
26 W
60 W
Standby consumptionPower consumption in standby according to the manufacturer in W – usually slightly higher with Wi-Fi
2 W
2 W

Controls & comfort

Fan speedsNumber of manually adjustable fan speeds according to the manufacturer, excluding auto and night mode
3 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
Yes
Remote controlRemote control included according to the manufacturer
No
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
5.8 kg (13 lb)
6.5 kg (14 lb)
Dimensions (W × D × H)Width × depth × height according to the manufacturer in cm – e.g. “27 × 27 × 52 cm”
29.1 × 29.1 × 50 cm (11 × 11 × 20 in)
31 × 31 × 73 cm (12 × 12 × 29 in)

General

Warranty
2 years
In the box
Air 4000, 3-in-1-Filter (Vorfilter, HEPA-Schicht, Aktivkohlefilter), Benutzerhandbuch, Kurzanleitung

Prices

Offers

Bosch Air 4000

Xiaomi Smart Air Purifier Elite

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Verdict

Pros & cons

Der Bosch Air 4000 ist ein schlichter HEPA-Luftreiniger ohne App, der mit 300 m³/h Räume bis etwa 24 m² schafft – nicht die 62,5 m² auf dem Karton. Er verbraucht höchstens 26 W und ist im Ruhemodus leise genug fürs Schlafzimmer, reinigt dann aber nur schwach. Der Haken liegt bei den teuren Ersatzfiltern und einer dünnen Aktivkohleschicht, die Gerüche kaum bindet.

Pros

  • Höchstens 26 W Leistungsaufnahme, rund 88 kWh im Jahr
  • Ruhemodus mit gemessenen 34 dB schlafzimmertauglich
  • PM2,5-Sensor regelt bei Staub und Rauch am Gerät nach 9 s hoch
  • Ohne WLAN und App, Bedienung über sechs Touchtasten
  • Filterwechselanzeige meldet den Tausch nach Verschleiß
  • Mit 5,8 kg leicht zwischen Räumen umzustellen

Cons

  • Ersatzfilter ist teuer und der größte laufende Kostenpunkt
  • Im Ruhemodus reinigt er nur schwach
  • Aktivkohle als dünne Schicht, Gerüche bleiben oft im Raum
  • Sensor übersieht schwache Rauchquellen 1 m neben dem Gerät
  • Mondsymbol leuchtet nachts und lässt sich nicht abschalten

Der Xiaomi Smart Air Purifier Elite ist ein solider Luftreiniger für große Wohnräume: Mit real rund 510 m³/h reinigt er Räume bis etwa 40 bis 48 m² und bindet Gerüche dank viel Aktivkohle zügig. Der Haken: Unter 45 dB schafft er nicht mehr als der 4 Pro, die Automatik regelt spät hoch, und ohne App und Konto kommst du über die Grundfunktionen kaum hinaus.

Pros

  • Real rund 510 m³/h, genug für Wohnzimmer bis etwa 40 bis 48 m²
  • Viel Aktivkohle mit 135 m³/h Formaldehyd-CADR, Kochgerüche schnell weg
  • Auf Stufe 1 etwa 30 dB, Display ganz abschaltbar
  • Filter hält rund 10 Monate, RFID-Chip erkennt Wechsel automatisch
  • Ionisator und UV-C-Diode direkt am Gerät abschaltbar
  • Sparsam mit 60 W Volllast und 2 W Standby

Cons

  • Unter 45 dB nur rund 295 m³/h, nicht mehr als der 4 Pro
  • Automatikmodus regelt nach Kochen oder Lüften erst spät hoch
  • Zeitpläne, manueller Modus und Regeln nur per App mit Konto
  • 3-in-1-Filter nur als Ganzes tauschbar, Ersatz nicht billig
  • PM2,5-Anzeige weicht stark von Vergleichsgeräten ab, eher Trendwert

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