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Dyson Purifier Cool Formaldehyde TP09 Review | 46 Data compared

Avg. price in UK: ~£590
Avg. price in US: ~$750
Max. CADR: 172 m³/h
Maximum room area: 27 m²
Maximum noise level: 61.5 dB
HEPA filter: yes
Weight: 4.85 kg

Dyson Purifier Cool Formaldehyde TP09 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.

6.5

Good

6.1

Good

8.2

Excellent

5.1
Bedroom use
Score components:
35.0%
1.8
Maximum noise level
30.0%
10
Night mode
20.0%
2.3
Maximum room area
15.0%
6.5
Weight
6.0
Allergy relief
Score components:
35.0%
3.6
Max. CADR
30.0%
10
HEPA filter
20.0%
5.5
Number of filtration stages
15.0%
4.0
Washable prefilter
7.2
Smoke removal
Score components:
35.0%
10
Activated carbon filter
30.0%
3.6
Max. CADR
20.0%
5.5
Number of filtration stages
15.0%
10
Air quality indicator

Best prices in UK

Best rankings

#5 in Best Dyson Air Purifiers
#50 in Best Smart Air Purifiers
#99 in Best Air Purifiers for Smoke
#99 in Best Air Purifiers with HEPA Filters
#101 in Best Air Purifiers for Mold
#102 in Best Air Purifiers
#102 in Best Air Purifiers for Pets
#114 in Best Air Purifiers for Dust
#122 in Best Air Purifiers for Bedrooms

Verdict

The Dyson Purifier Cool Formaldehyde TP09 is a premium tower-style 40W air purifier and bladeless cooling fan engineered with fully sealed HEPA H13 and activated carbon filtration that captures 99.95% of ultrafine particles down to 0.1 microns, including dust, allergens, and gases. Its standout characteristic is a dedicated solid-state sensor paired with a lifetime catalytic filter that continuously detects and destroys harmful formaldehyde by converting it into water and CO2. Main pros include a powerful 290 litres per second airflow driven by Air Multiplier technology, a 350-degree adjustable oscillation, 10 fan speed settings, a backward-diffused mode for winter purification without cooling, real-time LCD and mobile app monitoring, and an acoustically engineered chassis that is 20% quieter than previous models. However, notable cons include its high upfront price and filter replacement costs, a lower Clean Air Delivery Rate (CADR) compared to less expensive competitors in its price range, and a cooling breeze that some reviewers find relatively weak or noisy at higher speeds.

Technical Specifications of air purifier Dyson Purifier Cool Formaldehyde TP09

Overall score

6.5

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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

4.2

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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

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Features

8.5

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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

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

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Design

6.2

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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, gold

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

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

front

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

remote, app, voice

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Dyson Purifier Cool Formaldehyde TP09 vs the average air purifier

Why is Dyson Purifier Cool Formaldehyde TP09 better than the average air purifier?

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7 more fan speeds
Dyson Purifier Cool Formaldehyde TP9 provides more fan speed settings than the average air purifier (10 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
Dyson Purifier Cool Formaldehyde TP9 provides more fan speed settings than the average air purifier (10 vs 3).10 vs 3
Supports Wi‑Fi
Dyson Purifier Cool Formaldehyde TP9 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
Dyson Purifier Cool Formaldehyde TP9 supports Wi‑Fi; the average air purifier does not.
Has a fan function
Dyson Purifier Cool Formaldehyde TP9 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
Dyson Purifier Cool Formaldehyde TP9 has a fan function; the average air purifier does not.
Supports voice control
Dyson Purifier Cool Formaldehyde TP9 supports voice control; the average air purifier does not.
What it is: Integration with voice assistants such as Amazon Alexa, Google Assistant, or Apple Siri for voice commands.
When it matters: Offers convenient hands-free control to adjust fan speeds, check filter status, or turn the purifier on and off.
Importance: LOW
Dyson Purifier Cool Formaldehyde TP9 supports voice control; the average air purifier does not.
Supports 360° purification
Dyson Purifier Cool Formaldehyde TP9 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
Dyson Purifier Cool Formaldehyde TP9 supports 360° purification; the average air purifier does not.
5.3 cm narrower width
Dyson Purifier Cool Formaldehyde TP9 is narrower than the average air purifier (22 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
Dyson Purifier Cool Formaldehyde TP9 is narrower than the average air purifier (22 cm vs 27.3 cm).22 cm vs 27.3 cm
2.5 W higher power
Dyson Purifier Cool Formaldehyde TP9 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
Dyson Purifier Cool Formaldehyde TP9 has a higher power output than the average air purifier (40 W vs 37.5 W).40 W vs 37.5 W
1.9% higher user score
Dyson Purifier Cool Formaldehyde TP9 has a higher user score than the average air purifier (8.15 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.
Dyson Purifier Cool Formaldehyde TP9 has a higher user score than the average air purifier (8.15 vs 8).8.15 vs 8
7 more fan speeds
Dyson Purifier Cool Formaldehyde TP9 provides more fan speed settings than the average air purifier (10 vs 3).
Supports 360° purification
Dyson Purifier Cool Formaldehyde TP9 supports 360° purification; the average air purifier does not.
2.5 W higher power
Dyson Purifier Cool Formaldehyde TP9 has a higher power output than the average air purifier (40 W vs 37.5 W).
Supports Wi‑Fi
Dyson Purifier Cool Formaldehyde TP9 supports Wi‑Fi; the average air purifier does not.
Has a fan function
Dyson Purifier Cool Formaldehyde TP9 has a fan function; the average air purifier does not.
Supports voice control
Dyson Purifier Cool Formaldehyde TP9 supports voice control; the average air purifier does not.
5.3 cm narrower width
Dyson Purifier Cool Formaldehyde TP9 is narrower than the average air purifier (22 cm vs 27.3 cm).

Why is Dyson Purifier Cool Formaldehyde TP09 worse than the average air purifier?

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8.5 dB higher maximum noise level
Dyson Purifier Cool Formaldehyde TP9 runs louder at maximum speed than the average air purifier (61.5 dB vs 53 dB).
28.3% lower CADR
Dyson Purifier Cool Formaldehyde TP9 provides a lower clean air delivery rate than the average air purifier (172 m³/h vs 240 m³/h).
22 m² smaller room area
Dyson Purifier Cool Formaldehyde TP9 covers a smaller room area than the average air purifier (27 m² vs 49 m²).
No washable prefilter
Dyson Purifier Cool Formaldehyde TP9 does not have a washable prefilter; the average air purifier does.
55 cm taller height
Dyson Purifier Cool Formaldehyde TP9 is taller than the average air purifier (105 cm vs 50 cm).
6.1% higher weight
Dyson Purifier Cool Formaldehyde TP9 is heavier than the average air purifier (4.9 kg vs 4.57 kg).
19562.98 cm³ larger external volume
Dyson Purifier Cool Formaldehyde TP9 has a larger overall volume than the average air purifier (50820 cm³ vs 31257.025 cm³).
No washable prefilter
Dyson Purifier Cool Formaldehyde TP9 does not have a washable prefilter; the average air purifier does.
What it is: A reusable outer mesh screen that traps hair, pet fur, and coarse dust, and can be rinsed clean under running water.
When it matters: Substantially extends the lifespan of expensive inner HEPA and carbon filters by stopping large debris from clogging them.
Importance: MEDIUM
Dyson Purifier Cool Formaldehyde TP9 does not have a washable prefilter; the average air purifier does.
8.5 dB higher maximum noise level
Dyson Purifier Cool Formaldehyde TP9 runs louder at maximum speed than the average air purifier (61.5 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
Dyson Purifier Cool Formaldehyde TP9 runs louder at maximum speed than the average air purifier (61.5 dB vs 53 dB).61.5 dB vs 53 dB
22 m² smaller room area
Dyson Purifier Cool Formaldehyde TP9 covers a smaller room area than the average air purifier (27 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
Dyson Purifier Cool Formaldehyde TP9 covers a smaller room area than the average air purifier (27 m² vs 49 m²).27 m² vs 49 m²
28.3% lower CADR
Dyson Purifier Cool Formaldehyde TP9 provides a lower clean air delivery rate than the average air purifier (172 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
Dyson Purifier Cool Formaldehyde TP9 provides a lower clean air delivery rate than the average air purifier (172 m³/h vs 240 m³/h).172 m³/h vs 240 m³/h
55 cm taller height
Dyson Purifier Cool Formaldehyde TP9 is taller than the average air purifier (105 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
Dyson Purifier Cool Formaldehyde TP9 is taller than the average air purifier (105 cm vs 50 cm).105 cm vs 50 cm
4.21x more expensive
Dyson Purifier Cool Formaldehyde TP9 is more expensive than the average air purifier (£590 vs £140).
Dyson Purifier Cool Formaldehyde TP9 is more expensive than the average air purifier (£590 vs £140).£590 vs £140
22.3% worse value for money
Dyson Purifier Cool Formaldehyde TP9 offers worse value for money than the average air purifier (6.1 vs 7.463).
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.
Dyson Purifier Cool Formaldehyde TP9 offers worse value for money than the average air purifier (6.1 vs 7.463).6.1 vs 7.46
6.1% higher weight
Dyson Purifier Cool Formaldehyde TP9 is heavier than the average air purifier (4.9 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
Dyson Purifier Cool Formaldehyde TP9 is heavier than the average air purifier (4.9 kg vs 4.57 kg).4.85 kg vs 4.57 kg

Graphic comparison of Dyson Purifier Cool Formaldehyde TP09 and other products in the Air Purifiers category

Attribute category

Attribute

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Third-party reviews

United Kingdom

United States

(Reviews last updated: August 2026)

What customers like about Dyson Purifier Cool Formaldehyde TP09?

Excellent, intelligent automatic sensors that accurately detect air quality changes
Very quiet operation on lower settings, suitable for nighttime use
Effective at circulating air and cooling, even in large rooms
High-quality design and build with useful Dyson app connectivity
Formaldehyde detection and destruction capabilities are highly regarded

What customers dislike about Dyson Purifier Cool Formaldehyde TP09?

High price point makes it an expensive investment
Weak airflow performance as a fan, especially when compared to traditional fans
Can be loud when operating at higher speed settings
Limited effectiveness at removing strong cooking odors
Low Clean Air Delivery Rate (CADR) compared to some competitors, meaning it takes longer to clean air

Expert reviews

the-gadgeteer.com

03/06/2021

Summary of the review

Dyson Purifier Cool Formaldehyde purifying fan TP09 review

The Gadgeteer review praises the Dyson Purifier Cool Formaldehyde TP09 for its effective two-part filtration system, which includes a catalytic screen for destroying formaldehyde and a HEPA filter for particles. While the unit offers excellent air circulation, real-time air quality monitoring, and 350-degree oscillation, it is noted to be loud at high speeds and carries a high price point.

tech360.tv

08/05/2021

Summary of the review

Dyson Purifier Cool Formaldehyde Review: Even Furniture Is a Source of Pollution

The Tech360.tv review of the Dyson Purifier Cool Formaldehyde highlights its ability to constantly destroy formaldehyde from home pollutants using a lifetime catalytic filter, alongside a sealed HEPA H13 system and quieter operation. While praised for performance and real-time monitoring via the Dyson Link app, key cons include the high premium price, the need for recurring filter replacements, and its function as a fan rather than an air conditioner.

thedailybeast.com

26/04/2022

Summary of the review

Dyson Purifier Cool Air Purifier Fan Formaldehyde TP09 Review 2023

The Daily Beast praises the Dyson Purifier Cool Formaldehyde TP09 as a high-performance, dual-function device capable of automatically detecting and destroying formaldehyde using a specialized catalytic filter. The purifier features a robust, multi-layer filtration system effective against allergens and odors, along with convenient smart app integration. However, the review notes the nearly $700 price tag as a significant drawback, marking it as a premium investment.

gizbot.com

13/09/2022

Summary of the review

Dyson Air Purifier Cool Formaldehyde (TP09) Review - Unparalleled Performance at a Cost

The Gizbot review of the Dyson Air Purifier Cool Formaldehyde TP09 highlights its unparalleled performance, featuring advanced, fully-sealed HEPA H13 filtration and a specialized, lifetime catalytic filter designed to destroy formaldehyde. The device doubles as an effective bladeless fan with real-time air quality tracking via the Dyson Link App, though its primary drawback is a very high, premium price point.

techhive.com

15/12/2022

Summary of the review

Dyson Purifier Cool Formaldehyde TP09 review: Short on power

The TechHive review characterizes the Dyson Purifier Cool Formaldehyde (TP09) as a visually appealing, intelligent device that excels in destroying formaldehyde and tracking air quality, but suffers from low Clean Air Delivery Rates (CADR). While praised for its unique technology and dual-fan functionality, the unit is criticized for being underpowered and expensive, making it less efficient at purifying large spaces compared to competitors.

sgmagazine.com

23/06/2023

Summary of the review

Review: Dyson Cool Formaldehyde TP09 Air Purifier and Fan

The SG Magazine review describes the Dyson Cool Formaldehyde TP09 as a powerful, easy-to-use air purifier and fan that effectively uses HEPA H13 and activated carbon filters to eliminate allergens and formaldehyde, making it ideal for new homes. While praised for its quick setup and convenient remote control, the unit's primary drawback is its weak fan function, which provides only a light breeze that fails to effectively cool a space.

homesandgardens.com

14/06/2024

Summary of the review

Dyson Purifier Cool Formaldehyde TP09 Purifying Fan review

The Homes & Gardens review of the Dyson Purifier Cool Formaldehyde TP09 highlights it as a sophisticated, two-in-one appliance that excels at destroying formaldehyde and trapping 99.95% of ultra-fine pollutants while offering a sleek design, comprehensive app tracking, and unique backward airflow. While highly functional, the review notes significant cons, including a high $749.99 price point and weak cooling performance that makes it less effective as a fan compared to other market alternatives.

Video reviews

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