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De'Longhi AC 100 Review | 46 Data compared

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  • Avg. price in UK: ~£130
  • Avg. price in US: ~$180
  • Max. CADR: 132 m³/h
  • Maximum room area: 40 m²
  • Maximum noise level: 44 dB
  • HEPA filter: no
  • Weight: 5.7 kg

De'Longhi AC 100 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.

5.4

Overall score

What it is: An overall evaluation of products in the Air Purifiers category, based on technical analysis and user reviews.

When it matters: When you need a quick reference for identifying the best products in the Air Purifiers category.

Score components:

80.0%

5.3

Technical Score

20.0%

5.7

User score

Good
5.3

Technical Score

What it is: An assessment of technical performance for products in the Air Purifiers category across these key areas: Performance, Features, Design.

When it matters: When you want to compare products in the Air Purifiers category by technical performance, specifications, and available features.

Score components:

50.0%

4.3

Performance

40.0%

6.4

Features

10.0%

6.2

Design

Good
5.7

User score

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.

Score components:

70.0%

6.8

User reviews

30.0%

3.0

Popularity

User score:
United Kingdom
amazon
3.4
(63)

(Reviews last updated: August 2026)

Good
  • 5.3
    Bedroom use

    Score components:

    35.0%

    7.4

    Maximum noise level

    30.0%

    4.0

    Night mode

    20.0%

    3.4

    Maximum room area

    15.0%

    5.5

    Weight

  • 5.6
    Allergy relief

    Score components:

    35.0%

    2.7

    Max. CADR

    30.0%

    4.0

    HEPA filter

    20.0%

    10

    Number of filtration stages

    15.0%

    10

    Washable prefilter

  • 6.9
    Smoke removal

    Score components:

    35.0%

    10

    Activated carbon filter

    30.0%

    2.7

    Max. CADR

    20.0%

    10

    Number of filtration stages

    15.0%

    4.0

    Air quality indicator

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Best prices in UK

Best rankings

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Available: ranking among products currently available (including other versions of this product).
All: ranking among all products in the database.

Verdict

The De'Longhi AC 100 is a floor-standing 40-watt air purifier designed for rooms up to 40m², delivering an airflow rate of 70, 100, or 130 m³/h depending on the selected setting. Its core strength lies in a multi-stage filtration system combining a washable pre-filter, a certified HEPA filter targeting particles down to 0.3 microns, an active carbon filter for gases and odours, and an independently controlled ioniser. Key advantages include its flexible three-speed fan control, an automatic 1-to-8-hour auto-off timer, a dedicated LED filter replacement indicator, and a relatively quiet operation range between 33 and 44 dB(A). However, its limitations include a relatively low Clean Air Delivery Rate (CADR) for larger open-plan spaces, measuring at 114 for smoke, 132 for dust, and 121 for pollen, which reduces its effective coverage to just 10m² during highly intense air recycling cycles.

Technical Specifications of air purifier De'Longhi AC 100

Technical Score

What it is: An assessment of technical performance for products in the Air Purifiers category across these key areas: Performance, Features, Design.

When it matters: When you want to compare products in the Air Purifiers category by technical performance, specifications, and available features.

Score components:

50.0%

4.3

Performance

40.0%

6.4

Features

10.0%

6.2

Design

5.3
De'Longhi AC 100 has a technical score of 5.34 points, which is lower than 84.2% of products in this category.
User score

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.

Score components:

70.0%

6.8

User reviews

30.0%

3.0

Popularity

User score:
United Kingdom
amazon
3.4
(63)

(Reviews last updated: August 2026)

5.7
De'Longhi AC 100 has a user score of 5.66 points, which is lower than 97.8% of products in this category.
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.
3.0
De'Longhi AC 100 has a popularity of 3 points, which is lower than 73.8% of products in this category.
Ratio quality/price

What it is: An indicator that combines the overall score of products in the Air Purifiers category with their prices.

When it matters: When you are comparing products in the Air Purifiers category and want a good balance between quality and price.

Score components:

60.0%

5.4

Overall score

40.0%

9.7

Price

6.7
De'Longhi AC 100 has a quality-to-price ratio of 6.7 points, which is lower than 84.2% of products in this category.
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

40 W
De'Longhi AC 100 has a power output of 40 W, which is higher than that of 51.4% of air purifiers and the same as that of 7.2% of air purifiers.
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

132 m³/h
De'Longhi AC 100 delivers a CADR of 132 m³/h, which is lower than that of 80.8% of air purifiers.
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

40 m²
De'Longhi AC 100 covers up to 40 m², which is smaller than 60.3% of air purifiers and the same as 6.9% of air purifiers.
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

3
De'Longhi AC 100 offers 3 fan speeds, which is more than 6.7% of air purifiers and the same as 48.6% of air purifiers.
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

44 dB
De'Longhi AC 100 reaches 44 dB at maximum speed, which is quieter than 89.6% of air purifiers and the same as 1.2% of air purifiers.
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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

no
De'Longhi AC 100 does not have an air-quality indicator. This feature is present on 65.4% of air purifiers.
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

yes
De'Longhi AC 100 supports continuous purification. This feature is present on 86.3% of air purifiers.
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

no
De'Longhi AC 100 does not have auto mode. This feature is present on 67% of air purifiers.
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

yes
De'Longhi AC 100 has a timer. This feature is present on 75% of air purifiers.
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

8 hours
De'Longhi AC 100 features a maximum timer of 8 hours, which is longer than that of 5.5% of air purifiers and the same as that of 57.8% of air purifiers.
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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

white
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

plastic
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

yes
De'Longhi AC 100 has a display. This feature is present on 51.1% of air purifiers.
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

top
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

touch
Show more

De'Longhi AC 100 vs the average air purifier

  • 9 dB lower maximum noise level
    De'Longhi AC 100 runs quieter at maximum speed than the average air purifier (44 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

    De'Longhi AC 100 runs quieter at maximum speed than the average air purifier (44 dB vs 53 dB).44 dB vs 53 dB
  • 1 more filtration stage
    De'Longhi AC 100 features more filtration stages than the average air purifier (4 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

    De'Longhi AC 100 features more filtration stages than the average air purifier (4 vs 3).4 vs 3
  • Has a fan function
    De'Longhi AC 100 has a fan function; the average air purifier does not.
    What it is: A dedicated high-velocity ventilation mode that circulates cooling airflow like a traditional tower or desk fan.
    When it matters: Useful during warmer summer months to provide personal cooling breezes while purifying indoor air simultaneously.

    Importance: LOW

    De'Longhi AC 100 has a fan function; the average air purifier does not.
  • Has an ionizer
    De'Longhi AC 100 has an ionizer; the average air purifier does not.
    What it is: An auxiliary electronic feature releasing negative ions that attach to airborne particles, causing them to clump and settle faster.
    When it matters: Acts as a supplementary cleaning boost for fine dust, though buyers sensitive to ozone should ensure it can be toggled off.

    Importance: LOW

    De'Longhi AC 100 has an ionizer; the average air purifier does not.
  • Has a handle
    De'Longhi AC 100 has a handle; the average air purifier does not.
    What it is: An integrated carry handle or recessed hand grip built into the chassis for lifting.
    When it matters: Makes transporting the air purifier between bedrooms, living areas, or up and down stairs safer and effortless.

    Importance: LOW

    De'Longhi AC 100 has a handle; the average air purifier does not.
  • 11 cm shorter height
    De'Longhi AC 100 has a lower height than the average air purifier (39 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

    De'Longhi AC 100 has a lower height than the average air purifier (39 cm vs 50 cm).39 cm vs 50 cm
  • 2.5 W higher power
    De'Longhi AC 100 has a higher power output than the average air purifier (40 W vs 37.5 W).
    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

    De'Longhi AC 100 has a higher power output than the average air purifier (40 W vs 37.5 W).40 W vs 37.5 W
  • 1 cm shallower depth
    De'Longhi AC 100 is shallower than the average air purifier (21 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

    De'Longhi AC 100 is shallower than the average air purifier (21 cm vs 22 cm).21 cm vs 22 cm
  • 9 dB lower maximum noise level
    De'Longhi AC 100 runs quieter at maximum speed than the average air purifier (44 dB vs 53 dB).
  • 2.5 W higher power
    De'Longhi AC 100 has a higher power output than the average air purifier (40 W vs 37.5 W).
  • 1 more filtration stage
    De'Longhi AC 100 features more filtration stages than the average air purifier (4 vs 3).
  • Has a fan function
    De'Longhi AC 100 has a fan function; the average air purifier does not.
  • Has an ionizer
    De'Longhi AC 100 has an ionizer; the average air purifier does not.
  • Has a handle
    De'Longhi AC 100 has a handle; the average air purifier does not.
  • 11 cm shorter height
    De'Longhi AC 100 has a lower height than the average air purifier (39 cm vs 50 cm).
  • 1 cm shallower depth
    De'Longhi AC 100 is shallower than the average air purifier (21 cm vs 22 cm).

Total
Overall
Performance
Features
Design
  • 45% lower CADR
    De'Longhi AC 100 provides a lower clean air delivery rate than the average air purifier (132 m³/h vs 240 m³/h).
  • 9 m² smaller room area
    De'Longhi AC 100 covers a smaller room area than the average air purifier (40 m² vs 49 m²).
  • No HEPA filter
    De'Longhi AC 100 does not have a HEPA filter; the average air purifier does.
  • No air-quality indicator
    De'Longhi AC 100 does not have an air-quality indicator; the average air purifier does.
  • No auto mode
    De'Longhi AC 100 does not have auto mode; the average air purifier does.
  • No night mode
    De'Longhi AC 100 does not have night mode; the average air purifier does.
  • 17.7 cm wider width
    De'Longhi AC 100 is wider than the average air purifier (45 cm vs 27.3 cm).
  • 24.7% higher weight
    De'Longhi AC 100 is heavier than the average air purifier (5.7 kg vs 4.57 kg).
  • 5597.98 cm³ larger external volume
    De'Longhi AC 100 has a larger overall volume than the average air purifier (36855 cm³ vs 31257.025 cm³).
  • 45% lower CADR
    De'Longhi AC 100 provides a lower clean air delivery rate than the average air purifier (132 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

    De'Longhi AC 100 provides a lower clean air delivery rate than the average air purifier (132 m³/h vs 240 m³/h).132 m³/h vs 240 m³/h
  • No HEPA filter
    De'Longhi AC 100 does not have a HEPA filter; the average air purifier does.
    What it is: A High-Efficiency Particulate Air filter that traps at least 99.97% of microscopic airborne particles down to 0.3 microns.
    When it matters: Essential for allergy and asthma sufferers who require medical-grade capture of pollen, dust mite allergens, and fine pet dander.

    Importance: HIGH

    De'Longhi AC 100 does not have a HEPA filter; the average air purifier does.
  • No air-quality indicator
    De'Longhi AC 100 does not have an air-quality indicator; the average air purifier does.
    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

    De'Longhi AC 100 does not have an air-quality indicator; the average air purifier does.
  • No auto mode
    De'Longhi AC 100 does not have auto mode; the average air purifier does.
    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

    De'Longhi AC 100 does not have auto mode; the average air purifier does.
  • No night mode
    De'Longhi AC 100 does not have night mode; the average air purifier does.
    What it is: A specialized sleep mode that locks the fan to its quietest low-speed setting and dims or extinguishes all control lights.
    When it matters: Essential for light sleepers and bedrooms, preventing distracting illumination and audible motor hum throughout the night.

    Importance: MEDIUM

    De'Longhi AC 100 does not have night mode; the average air purifier does.
  • 17.7 cm wider width
    De'Longhi AC 100 is wider than the average air purifier (45 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

    De'Longhi AC 100 is wider than the average air purifier (45 cm vs 27.3 cm).45 cm vs 27.3 cm
  • 9 m² smaller room area
    De'Longhi AC 100 covers a smaller room area than the average air purifier (40 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

    De'Longhi AC 100 covers a smaller room area than the average air purifier (40 m² vs 49 m²).40 m² vs 49 m²
  • 24.7% higher weight
    De'Longhi AC 100 is heavier than the average air purifier (5.7 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

    De'Longhi AC 100 is heavier than the average air purifier (5.7 kg vs 4.57 kg).5.7 kg vs 4.57 kg
Total
Overall
Performance
Features
Design

Graphic comparison of De'Longhi AC 100 and other products in the Air Purifiers category

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Third-party reviews

United Kingdom
amazon
3.4
63 Reviews

(Reviews last updated: August 2026)

What customers like about De'Longhi AC 100?

  • Highly effective multi-stage filtration system that noticeably cleans the air, leaving rooms feeling fresher.
  • Operates very quietly on lower fan settings, making it suitable for bedroom use during the night.
  • User-friendly design featuring a lightweight build and an intuitive, easy-to-use touch control panel.
  • Useful built-in convenience features including an independently controlled ionizer and an auto-shutoff timer.

What customers dislike about De'Longhi AC 100?

  • Filter durability is a common point of dissatisfaction, with users noting that filters need frequent replacement.
  • Noise levels increase significantly when operating at the maximum fan speed.
  • Ongoing maintenance costs can become high due to the regular replacement schedule of the 2-in-1 HEPA and carbon filters.

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