OVERALL

SPECS

VS AVERAGE

REVIEWS

ALTERNATIVES

AEG AX91-604GY Review | 46 Data compared

Avg. price in UK: ~£590
Avg. price in US: ~$680
Max. CADR: 620 m³/h
Maximum room area: 129 m²
Maximum noise level: 49 dB
HEPA filter: yes
Weight: 8.9 kg

AEG AX91-604GY review. Compare 46 technical specifications and user reviews to see how this product ranks in the Air Purifiers category and whether it is worth buying.

8.2

Excellent

8.4

Excellent

7.1

Very good

7.3
Bedroom use
Score components:
35.0%
5.8
Maximum noise level
30.0%
10
Night mode
20.0%
10
Maximum room area
15.0%
1.9
Weight
10
Allergy relief
Score components:
35.0%
10
Max. CADR
30.0%
10
HEPA filter
20.0%
10
Number of filtration stages
15.0%
10
Washable prefilter
10
Smoke removal
Score components:
35.0%
10
Activated carbon filter
30.0%
10
Max. CADR
20.0%
10
Number of filtration stages
15.0%
10
Air quality indicator

Best prices in UK

£?

Best rankings

#1 in Best Air Purifiers for Dust
#7 in Best Air Purifiers
#7 in Best Air Purifiers for Smoke
#7 in Best Air Purifiers for Mold
#7 in Best Air Purifiers with HEPA Filters
#7 in Best Air Purifiers for Pets
#7 in Best Smart Air Purifiers
#33 in Best Air Purifiers for Bedrooms

Verdict

The AEG AX91-604GY is a smart, Wi-Fi connected air purifier designed for large spaces up to 129 m², delivering a high Clean Air Delivery Rate (CADR) of 620 m³/h. It features a comprehensive 5-stage purification system comprising a mesh pre-filter, an antibacterial layer, a pre-charged True EPA12 filter, active carbon, and an optional ioniser to capture 99.5% of microscopic particles as small as 0.3 microns. Main pros include its responsive PureSense technology that automatically adjusts the 9 fan speeds based on real-time air quality metrics (PM1/PM2.5/PM10/TVOC), an energy-efficient power draw ranging from 4W to 41W, and exceptionally quiet operation that drops down to 17 dB. However, notable cons include its lack of a built-in hardware timer control, a substantial unit weight of 8.9 kg that limits portability, and the premium cost or occasional availability challenges associated with replacing its specialized 360-degree cylindrical filters.

Technical Specifications of air purifier AEG AX91-604GY

Overall score

8.2

Show more

Hide

Popularity

What it is: An indicator based on the number of reviews received by products in the Air Purifiers category.

When it matters: When you prefer products in the Air Purifiers category that have been chosen and reviewed by many other buyers.

Performance

8.7

Show more

Hide

Power

What it is: The electrical power consumption of the air purifier during operation, measured in watts (W).

When it matters: Helpful for estimating long-term electricity costs, particularly when running the unit continuously day and night.

Importance: HIGH

Max. CADR

What it is: The Clean Air Delivery Rate (CADR), measuring the volume of purified air delivered per hour in cubic metres.

When it matters: Crucial for determining how rapidly the purifier circulates and cleans room air, especially for severe allergies or larger spaces.

Importance: HIGH

Maximum room area

What it is: The maximum recommended floor area (in square metres) that the air purifier can effectively treat.

When it matters: Essential for matching the purifier's airflow capacity to your room size so all air is filtered thoroughly.

Importance: HIGH

N. of speeds

What it is: The number of manual airflow speed levels available to choose on the air purifier.

When it matters: Provides flexible control between whisper-quiet low speeds for sleeping and powerful high speeds for fast room clearing.

Importance: MEDIUM

Maximum noise level

What it is: The sound level emitted by the air purifier when running at its highest fan speed, measured in decibels (dB).

When it matters: Important if you plan to use the purifier in bedrooms, nurseries, or home offices where loud fan noise causes disturbance.

Importance: HIGH

Show more

Features

9.1

Show more

Hide

Air quality indicator

What it is: An optical or laser sensor system displaying real-time indoor pollution levels via color rings or numerical values.

When it matters: Provides immediate visual feedback on air cleanliness and confirms that the purifier is working effectively.

Importance: MEDIUM

Continuous purification

What it is: Engineered motor and filter architecture designed for safe, uninterrupted 24/7 operation without thermal degradation.

When it matters: Essential for maintaining permanently low allergen and dust concentrations in polluted urban areas or high-pollen seasons.

Importance: LOW

Auto mode

What it is: An intelligent operating mode that automatically increases or decreases fan speed based on live sensor pollution readings.

When it matters: Maximizes convenience and saves electricity by running quietly on low speed and ramping up only when pollution is detected.

Importance: MEDIUM

Timer

What it is: A programmable shut-off countdown timer that turns off the air purifier automatically after a set number of hours.

When it matters: Convenient for running the unit for a specific duration before leaving home or going to bed without wasting electricity.

Importance: LOW

Maximum timer

What it is: The longest selectable countdown duration available on the air purifier's timer, expressed in hours.

When it matters: Relevant if you prefer setting extended automated operating cycles, such as a full 8-hour workday or 12-hour overnight window.

Importance: LOW

?

Show more

Design

4.4

Show more

Hide

Color

What it is: The primary exterior color and aesthetic finish of the air purifier housing.

When it matters: Important for ensuring the appliance blends harmoniously into your room decor and furniture style.

Importance: LOW

grey

Material

What it is: The primary manufacturing material used for the outer casing, such as ABS plastic, polycarbonate, or aluminum.

When it matters: Influences structural rigidity, scratch resistance, premium appearance, and ease of wiping clean.

Importance: LOW

stainless steel

Display

What it is: An integrated digital screen showing active fan speed, particulate pollution numbers, filter health, and active timers.

When it matters: Enables quick visual checks of air metrics and purifier settings directly on the device without picking up your phone.

Importance: LOW

Display position

What it is: The physical placement of the display screen on the body of the air purifier (e.g., top panel or front facade).

When it matters: Affects viewing convenience: top displays are easiest to read while standing, while front displays are visible from across the room.

Importance: LOW

N/A

Control type

What it is: The user interface mechanism for operating the device, such as capacitive touch keys, push buttons, or rotary dials.

When it matters: Determines tactile responsiveness, ease of operation in dark rooms, and durability over years of regular use.

Importance: LOW

buttons, app

Show more

AEG AX91-604GY vs the average air purifier

Why is AEG AX91-604GY better than the average air purifier?

Show more

Hide

2.58x higher CADR
AEG AX91-604GY provides a higher clean air delivery rate than the average air purifier (620 m³/h vs 240 m³/h).
What it is: The Clean Air Delivery Rate (CADR), measuring the volume of purified air delivered per hour in cubic metres.
When it matters: Crucial for determining how rapidly the purifier circulates and cleans room air, especially for severe allergies or larger spaces.
Importance: HIGH
AEG AX91-604GY provides a higher clean air delivery rate than the average air purifier (620 m³/h vs 240 m³/h).620 m³/h vs 240 m³/h
80 m² larger room area
AEG AX91-604GY covers a larger room area than the average air purifier (129 m² vs 49 m²).
What it is: The maximum recommended floor area (in square metres) that the air purifier can effectively treat.
When it matters: Essential for matching the purifier's airflow capacity to your room size so all air is filtered thoroughly.
Importance: HIGH
AEG AX91-604GY covers a larger room area than the average air purifier (129 m² vs 49 m²).129 m² vs 49 m²
6 more fan speeds
AEG AX91-604GY provides more fan speed settings than the average air purifier (9 vs 3).
What it is: The number of manual airflow speed levels available to choose on the air purifier.
When it matters: Provides flexible control between whisper-quiet low speeds for sleeping and powerful high speeds for fast room clearing.
Importance: MEDIUM
AEG AX91-604GY provides more fan speed settings than the average air purifier (9 vs 3).9 vs 3
2 more filtration stages
AEG AX91-604GY features more filtration stages than the average air purifier (5 vs 3).
What it is: The total number of specialized filter barriers (e.g., pre-filter, HEPA, activated carbon) air flows through inside the unit.
When it matters: More filtration stages ensure that coarse hair, fine dust allergens, and gaseous odors are captured by dedicated, purpose-built layers.
Importance: MEDIUM
AEG AX91-604GY features more filtration stages than the average air purifier (5 vs 3).5 vs 3
Supports Wi‑Fi
AEG AX91-604GY supports Wi‑Fi; the average air purifier does not.
What it is: Wireless connectivity enabling smartphone app pairing for remote operation, scheduling, and live air quality tracking.
When it matters: Allows you to inspect home pollution levels from work and turn on the purifier so you return home to clean air.
Importance: MEDIUM
AEG AX91-604GY supports Wi‑Fi; the average air purifier does not.
Has a child lock
AEG AX91-604GY has a child lock; the average air purifier does not.
What it is: A safety lock feature that disables the on-device control panel buttons to prevent unintended changes.
When it matters: Essential in households with curious toddlers or pets who might accidentally switch off the purifier or alter speed settings.
Importance: MEDIUM
AEG AX91-604GY has a child lock; the average air purifier does not.
Supports 360° purification
AEG AX91-604GY supports 360° purification; the average air purifier does not.
What it is: A cylindrical or multi-directional intake design that draws in polluted room air from all surrounding angles.
When it matters: Improves airflow circulation and offers versatile room placement without needing to position the intake toward open space.
Importance: MEDIUM
AEG AX91-604GY supports 360° purification; the average air purifier does not.
4 dB lower maximum noise level
AEG AX91-604GY runs quieter at maximum speed than the average air purifier (49 dB vs 53 dB).
What it is: The sound level emitted by the air purifier when running at its highest fan speed, measured in decibels (dB).
When it matters: Important if you plan to use the purifier in bedrooms, nurseries, or home offices where loud fan noise causes disturbance.
Importance: HIGH
AEG AX91-604GY runs quieter at maximum speed than the average air purifier (49 dB vs 53 dB).49 dB vs 53 dB
2.58x higher CADR
AEG AX91-604GY provides a higher clean air delivery rate than the average air purifier (620 m³/h vs 240 m³/h).
80 m² larger room area
AEG AX91-604GY covers a larger room area than the average air purifier (129 m² vs 49 m²).
6 more fan speeds
AEG AX91-604GY provides more fan speed settings than the average air purifier (9 vs 3).
Supports 360° purification
AEG AX91-604GY supports 360° purification; the average air purifier does not.
4 dB lower maximum noise level
AEG AX91-604GY runs quieter at maximum speed than the average air purifier (49 dB vs 53 dB).
3.5 W higher power
AEG AX91-604GY has a higher power output than the average air purifier (41 W vs 37.5 W).
2 more filtration stages
AEG AX91-604GY features more filtration stages than the average air purifier (5 vs 3).
Supports Wi‑Fi
AEG AX91-604GY supports Wi‑Fi; the average air purifier does not.
Has a child lock
AEG AX91-604GY has a child lock; the average air purifier does not.
Has an ionizer
AEG AX91-604GY has an ionizer; the average air purifier does not.
0.2 m longer power cord
AEG AX91-604GY features a longer power cord than the average air purifier (2 m vs 1.8 m).
Has a handle
AEG AX91-604GY has a handle; the average air purifier does not.

Why is AEG AX91-604GY worse than the average air purifier?

Show more

Hide

0.07 % percentage points lower bacteria elimination
AEG AX91-604GY achieves lower certified bacteria elimination than the average air purifier (99.9% vs 99.97%).
94.7% higher weight
AEG AX91-604GY is heavier than the average air purifier (8.9 kg vs 4.57 kg).
No display
AEG AX91-604GY does not have a display; the average air purifier does.
9.5 cm greater depth
AEG AX91-604GY is deeper than the average air purifier (31.5 cm vs 22 cm).
22.5 cm taller height
AEG AX91-604GY is taller than the average air purifier (72.5 cm vs 50 cm).
4.2 cm wider width
AEG AX91-604GY is wider than the average air purifier (31.5 cm vs 27.3 cm).
40681.1 cm³ larger external volume
AEG AX91-604GY has a larger overall volume than the average air purifier (71938.1 cm³ vs 31257.025 cm³).
94.7% higher weight
AEG AX91-604GY is heavier than the average air purifier (8.9 kg vs 4.57 kg).
What it is: The total physical net weight of the air purifier without packaging, measured in kilograms (kg).
When it matters: Important if you frequently carry the purifier between rooms, to different floors, or place it on furniture.
Importance: MEDIUM
AEG AX91-604GY is heavier than the average air purifier (8.9 kg vs 4.57 kg).8.9 kg vs 4.57 kg
0.07 % percentage points lower bacteria elimination
AEG AX91-604GY achieves lower certified bacteria elimination than the average air purifier (99.9% vs 99.97%).
What it is: The certified laboratory efficiency percentage demonstrating the purifier's ability to eliminate airborne bacteria and microbes.
When it matters: Reassuring for hygiene-focused households, medical offices, or homes with infants where airborne pathogen reduction is a priority.
Importance: MEDIUM
AEG AX91-604GY achieves lower certified bacteria elimination than the average air purifier (99.9% vs 99.97%).99.9 % vs 99.97 %
No display
AEG AX91-604GY does not have a display; the average air purifier does.
What it is: An integrated digital screen showing active fan speed, particulate pollution numbers, filter health, and active timers.
When it matters: Enables quick visual checks of air metrics and purifier settings directly on the device without picking up your phone.
Importance: LOW
AEG AX91-604GY does not have a display; the average air purifier does.
9.5 cm greater depth
AEG AX91-604GY is deeper than the average air purifier (31.5 cm vs 22 cm).
What it is: The front-to-back depth measurement of the air purifier, in centimetres (cm).
When it matters: Determines how far the purifier protrudes outward into walkways or away from walls.
Importance: LOW
AEG AX91-604GY is deeper than the average air purifier (31.5 cm vs 22 cm).31.5 cm vs 22 cm
22.5 cm taller height
AEG AX91-604GY is taller than the average air purifier (72.5 cm vs 50 cm).
What it is: The vertical height of the air purifier unit, measured in centimetres (cm).
When it matters: Important for ensuring the unit fits underneath tables, under low window sills, or onto designated shelves.
Importance: LOW
AEG AX91-604GY is taller than the average air purifier (72.5 cm vs 50 cm).72.5 cm vs 50 cm
4.21x more expensive
AEG AX91-604GY is more expensive than the average air purifier (£590 vs £140).
AEG AX91-604GY is more expensive than the average air purifier (£590 vs £140).£590 vs £140
4.2 cm wider width
AEG AX91-604GY is wider than the average air purifier (31.5 cm vs 27.3 cm).
What it is: The horizontal width across the front of the air purifier, measured in centimetres (cm).
When it matters: Essential for confirming the unit fits neatly between furniture, in tight corners, or on compact bedside tables.
Importance: LOW
AEG AX91-604GY is wider than the average air purifier (31.5 cm vs 27.3 cm).31.5 cm vs 27.3 cm
13.4% lower user score
AEG AX91-604GY has a lower user score than the average air purifier (7.05 vs 8).
What it is: A rating that combines user reviews with the total review volume for products in the Air Purifiers category.
When it matters: When you want to know how products in the Air Purifiers category perform in everyday use and how reliable owners find them over time.
AEG AX91-604GY has a lower user score than the average air purifier (7.05 vs 8).7.05 vs 8

Graphic comparison of AEG AX91-604GY and other products in the Air Purifiers category

Attribute category

Attribute

No results found

Third-party reviews

United Kingdom

United States

(Reviews last updated: August 2026)

What customers like about AEG AX91-604GY?

High cleaning capacity suitable for large and open-plan spaces up to 118 square meters
Extremely quiet operation, reaching as low as 17 decibels on its lowest setting
Effective five-stage filtration system that removes bacteria, allergens, fine dust, and odors
Smart PureSense technology automatically adjusts fan speeds based on real-time air quality
Clear, intuitive six-color LED visual indicator for live air quality tracking
Well-designed AEG Wellbeing smartphone app for remote tracking, scheduling, and filter life monitoring
Aesthetically pleasing, stylish, and premium design that blends well with home decor

What customers dislike about AEG AX91-604GY?

High initial purchase price and considered a significant investment
Ongoing high cost for replacing specialized filters regularly
Occasional Wi-Fi pairing and app connectivity issues reported by some users
Filters can become noisy and noticeable when running at maximum speed settings
Large and bulky physical footprint compared to smaller room purifiers
Reliance on the mobile application to access advanced features like the ionizer or detailed history

Expert reviews

idealhome.co.uk

08/02/2024

Summary of the review

AEG AX91-604GY Connected Air Purifier review - Ideal Home

The Ideal Home review of the AEG AX91-604GY connected air purifier highlights it as a powerful, smart unit suitable for large spaces (up to 118m²) featuring an intuitive, colour-coded air quality indicator, exceptionally quiet operation (as low as 17 dB(A)), and robust app-based controls. While the PureSense technology excels at automated, five-stage air purification, the unit is characterized as having a large physical footprint, high-cost replacement filters, and specific features—such as ionization—that can only be managed via the app.

womanandhome.com

03/12/2020

Summary of the review

AEG AX9 600 Connected air purifier review | Woman & Home

The AEG AX9 600 Connected air purifier is a high-performance, stylish device featuring a five-stage filtration system, responsive PureSense technology, and a very quiet 17dB sleep mode. According to the Woman & Home review, key strengths include efficient air circulation in large rooms and intuitive app tracking, though drawbacks include a bulky design, high noise at max settings, and expensive replacement filters.

Video reviews

Best alternatives

Rabbit Air A3 SPA-1000N

Air Purifiers

Alen BreatheSmart 75i

Air Purifiers

Electrolux PA91-604GY

Air Purifiers

Philips 3000i Series AC3033/10

Air Purifiers

Dyson Pure Cool TP04

Air Purifiers

Rabbit Air MinusA2 SPA-780A

Air Purifiers

Fellowes AeraMax SE H13

Air Purifiers

Dyson Purifier Cool Formaldehyde TP09

Air Purifiers

Philips 2000i Series AC2729/10

Air Purifiers

Dyson Purifier Cool TP07

Air Purifiers

Philips 5000i AC5659/10

Air Purifiers

Philips AMF870/15 Air Performer

Air Purifiers

Compare AEG AX91-604GY with other products in the Air Purifiers category

Compare