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Kärcher AF 20 vs. Xiaomi Smart Air Purifier Elite compared
Air Purifier
At a glance
The key numbers for both devices side by side.
Overall rating
7171Solide
7171Solide
Value for money
66Fair
50Okay
Best price
€121.61
€304.90
Price advantage
€183.29 cheaper
—
Offers
1 shop
1 shop
Rank in category
Rank 33 of 54
Rank 36 of 54
Rating
Sub-ratings compared
Kärcher AF 20Overall rating 71Xiaomi Smart Air Purifier EliteOverall rating 71
Kärcher AF 20Xiaomi Smart Air Purifier Elite
Cleaning performance66/10078/100
Noise level78/10070/100
Auto mode & sensors76/10055/100
Running costs & consumption68/10072/100
Ease of use & build quality72/10068/100
Cleaning performance
66
78
Noise level
78
70
Auto mode & sensors
76
55
Running costs & consumption
68
72
Ease of use & build quality
72
68
Specs
Specs compared
Key specs
Brand
Model
AF 20
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
220 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
18 m² (194 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
26 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
40 €/year
65 €/year
Filters & air
Filter change everyReplacement interval of the main filter according to the manufacturer in months
12 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 particlesTemperature
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
Reading on display
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
No
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
52 dB
68 dB
Power consumptionPower consumption at the highest setting according to the manufacturer in W
24 W
60 W
Standby consumptionPower consumption in standby according to the manufacturer in W – usually slightly higher with Wi-Fi
0.5 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
Timer up toLongest timer setting according to the manufacturer in hours
8 hours
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
3 kg (6.6 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”
22 × 22 × 34.6 cm (8.7 × 8.7 × 14 in)
31 × 31 × 73 cm (12 × 12 × 29 in)
General
Warranty
2 years
2 years
Model year
2022
In the box
Luftreiniger AF 20 mit 2 eingesetzten HEPA-13-Filtern inkl. antibakterieller Aktivkohleschicht
Prices
Offers
Verdict
Pros & cons
Der Kärcher AF 20 ist ein solider Luftreiniger für kleine Zimmer: Mit 220 m³/h reicht er realistisch für etwa 18 m², im Nachtmodus läuft er mit 26 dB und ohne Leuchtanzeigen. Für dein Schlaf- oder Kinderzimmer taugt er, für Wohnzimmer nicht. Der Haken: Gegen Rauch und Katzenklo hilft die dünne Aktivkohle kaum gegen Gerüche, und im Dauerbetrieb ist das Filterset nach rund vier Monaten fällig.
Pros
- Nachtmodus mit 26 dB, alle Leuchtanzeigen gehen aus
- Lasersensor regelt die Stufe nach Feinstaub, Messwert in µg/m³ im Display
- Kompakt mit 22 x 22 cm Stellfläche und 3 kg
- Display separat abschaltbar, Automatik läuft weiter
- Niedriger Stromverbrauch mit 24 W
- Kein Konto und keine App nötig, Kindersicherung per Sperrtaste
Cons
- Aktivkohle bindet Rauch-, Katzenklo- und Gummigeruch kaum
- Filterset hält höchstens 3000 h, im Dauerbetrieb rund vier Monate
- Keine Fernbedienung und keine App, Stufe nur am Gerät änderbar
- Verpackung verspricht 40 m², realistisch sind knapp 18 m²
- Display nicht entspiegelt und schlecht abzulesen
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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