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Bosch Air 1000 vs. Bosch Air 4000i compared

Air Purifier

At a glance

The key numbers for both devices side by side.

Overall rating
64Solide
81Gut
Value for money
51Okay
81Excellent
Best price
€87.43€89.99−3 %
€219.06
Price advantage
€131.63 cheaper
—
Offers
1 shop
1 shop
Rank in category
Rank 45 of 54
Rank 12 of 54

Rating

Sub-ratings compared

Bosch Air 1000Overall rating 64Bosch Air 4000iOverall rating 81
CleaningperformanceNoise levelAutomode & sensorsRunningcosts & consumptionEaseof use & build quality
Bosch Air 1000Bosch Air 4000i
Cleaning performance60/10085/100
Noise level76/10084/100
Auto mode & sensors65/10073/100
Running costs & consumption50/10081/100
Ease of use & build quality70/10073/100
Cleaning performance
60
85
Noise level
76
84
Auto mode & sensors
65
73
Running costs & consumption
50
81
Ease of use & build quality
70
73

Specs

Specs compared

Key specs

Brand
Bosch
Bosch
Model
Air 1000
Air 4000i
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
100 m³/h
300 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
8 m² (86 sq ft)
24 m² (258 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
25 dB
25 dB
Filter costCost of replacement filters per year at the manufacturer’s replacement interval in € – over the years often more than the purchase price
50 €/year

Filters & air

Filter change everyReplacement interval of the main filter according to the manufacturer in months
4 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
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
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
No ionizer
UV sterilizationUV-C lamp inside the unit for sterilization according to the manufacturer
No
No
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
Power consumptionPower consumption at the highest setting according to the manufacturer in W
23 W
26 W
Standby consumptionPower consumption in standby according to the manufacturer in W – usually slightly higher with Wi-Fi
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
12 hours
Child lockButton lock according to the manufacturer
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 appMatter

Features & dimensions

WeightWeight according to the manufacturer in kg – important if the unit moves between rooms
1.6 kg (3.5 lb)
4 kg (8.8 lb)
Dimensions (W × D × H)Width × depth × height according to the manufacturer in cm – e.g. “27 × 27 × 52 cm”
20.5 × 20.5 × 27 cm (8.1 × 8.1 × 11 in)
29.1 × 29.1 × 50 cm (11 × 11 × 20 in)

General

Price segment
Mid-range
Model year
2025
In the box
Air 1000, 3-in-1 Filter (Vorfilter, HEPA-Schicht, Aktivkohlefilter), Benutzerhandbuch, Kurzanleitung
Luftreiniger, Kombifilter

Prices

Offers

Bosch Air 1000

Bosch Air 4000i

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Verdict

Pros & cons

Der Bosch Air 1000 ist ein kleiner, reiner Filter-Luftreiniger, der mit 100 m³/h für rund 8 m² reicht, nicht für die 23 m² auf dem Karton. Im Ruhemodus läuft er mit angegebenen 25 dB und schaltet alle Leuchten ab, Pollen und Staub filtert er heraus. Gegen Gerüche hilft er kaum, und Ersatzfilter brauchst du zwei- bis dreimal im Jahr, 2026 waren sie zeitweise nicht lieferbar.

Pros

  • Ruhemodus mit angegebenen 25 dB schaltet Display und Leuchtring ab
  • Filtert Pollen und Staub in kleinen Räumen aus der Luft
  • Automatikmodus mit Sensor regelt die drei Stufen selbst
  • USB-C-Buchse lädt das Handy mit bis zu 5 W
  • Bedienung per Touchfeld ohne App und Konto

Cons

  • 100 m³/h reichen für rund 8 m² statt der beworbenen 23 m²
  • Bindet Gerüche kaum, die Aktivkohle-Lage ist dünn
  • Ersatzfilter alle 4 bis 6 Monate, 2026 zeitweise nicht lieferbar
  • Luftqualitätsanzeige springt teils ohne erkennbaren Grund zwischen Extremen
  • In zwei Lieferungen fehlte das 12-V-Netzteil

Der Bosch Air 4000i ist ein leiser, sauber verarbeiteter Mittelklasse-Reiniger für Schlaf- und Wohnzimmer bis etwa 24 m². Mit 300 m³/h filtert er zügig, im Ruhemodus läuft er mit rund 34 dB, und die Anzeige lässt sich abschalten. Der Haken: eine App mit wenig Tiefgang, Kopplung nur im 2,4-GHz-WLAN und ein Sensor, der entfernte Rauchquellen übersieht.

Pros

  • Ruhemodus mit knapp 34 dB und abgeschaltetem Leuchtring, gut fürs Schlafzimmer
  • CADR von 300 m³/h reinigt Räume bis 24 m² zügig
  • Sensor reagiert auf direkten Rauch nach 9 Sekunden, Werte nah am Referenzgerät
  • Höchste Stufe mit 53 dB vergleichsweise leise
  • Matter-zertifiziert, lokal in Home Assistant und Apple Home steuerbar
  • Geringer Stromverbrauch mit 26 W, Filter hält rund 12 Monate

Cons

  • Sensor übersieht schwache Quellen wie ein Räucherstäbchen in 1 m Abstand
  • App ohne Feinstaubverlauf und Warnung, Konto und 2,4-GHz-WLAN nötig
  • Feste Lüfterstufen, Wechsel der Automatik sind hörbar
  • Kombifilter muss komplett raus, wenn die Aktivkohle gesättigt ist
  • Filterwechsel über den Boden, Gerät muss dafür auf den Kopf

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