Dyson Purifier Big+Quiet Formaldehyde BP04 – air purifier for large rooms
£423.99
In stock
£423.99
Dyson Purifier Big+Quiet Formaldehyde BP04 – air purifier for large rooms
Shipping from £3.99 · See delivery options before you order.
Estimated delivery: 3–5 working days · Standard delivery (tracked)
Delivery details & exclusions- 14-day right to cancel
- Secure payment
- Mainland GB delivery
- 30-day right to reject
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Air that reaches all the way
The cone-shaped outlets gather the airflow and project it far into the room, while new air is drawn in through the filter below.
Everything in the app
The MyDyson app shows what the sensors read, what has been captured and lets you set schedules wherever you are.
Auto mode does the rest
When the sensors detect pollutants it raises the fan speed; when the air is clean it slows down again and saves power.
Reviews
★★★★★4.3 out of 5 · 155 ratings on Dyson
★★★★★Top
Top features for a 100 m² flat. Controlling it with the Dyson app is really simple and intuitive.
Yann71 · 29 September 2026
★★★★★Fantastic features
What a fantastic piece of equipment. The filtration system works well and the airflow is lovely. There is hardly any noise. When used correctly, especially on auto mode, picks up any smells. Fully recommend.
Andy69 · 14 July 2026
★★★★★Dyson Purifier Blue/Gold
Sometimes having 2 dogs meant the house was beginning to smell but this unit is amazing and eliminates all odour
Flossy · 3 August 2026
★★★★★Massive and effective
Massive and powerful. It's effective in a 40 m² room. I also have smaller Dyson purifiers that weren't enough. It's a good product.
JAX63 · 23 February 2026
★★★★★Very effective
We are very satisfied with our purchase, the purifier is effective and quiet. Very good quality and easy to use, and the wheels for moving it work very well, even on our uneven tiled floor. The settings via the phone or the remote are easy.
Marnie · 16 February 2026
★★★★★Big, beautiful and effective
The product is imposing but it's beautiful and does the job well.
Titi77 · 19 February 2026
Product FAQ
How big a room can it handle?
It's made for large rooms and open-plan spaces; the airflow reaches over 10 metres according to Dyson.
Is it quiet?
It's acoustically engineered for a low noise level and has a night mode that dims both sound and display.
How do I move it?
It has hidden wheels for hard floors, so you can roll it between rooms.
How is the filter changed?
Lift off the top and release the filter with one click – the screen and app tell you when it's time.
How fast will it arrive, and can I change my mind?
Delivery options and times are on our Delivery page. You have a 14-day right to cancel. See our Returns page for conditions, return costs and your rights if an item is faulty.
Description
An air purifier for large rooms and open-plan spaces, built to be quiet. Cone-shaped outlets project the purified air far into the room – over 80 litres per second according to Dyson – while drawing air in through the sealed filter.
You set the airflow at 0°, 25° or 50°, or choose Breeze mode, which varies like a gentle breeze. Sensors read particles, gases, formaldehyde and CO₂, and in Auto mode it adapts by itself and only uses power when needed. It also warns you when the CO₂ level in the room gets high, so you know it's time to air the room.
Everything shows on the display and in the MyDyson app, where you also set schedules. Hidden wheels let it roll easily on hard floors, and the filter changes with one click.
Features
- For large rooms – airflow reaching over 10 metres according to Dyson
- Quiet design with night mode
- Sensors for particles, gases, formaldehyde and CO₂
- Warns when CO₂ is high – time to air the room
- Airflow at 0°, 25°, 50° or Breeze mode
- Hidden wheels and one-click filter change
Specifications
| Brand and model | Dyson Purifier Big+Quiet Formaldehyde BP04 |
|---|---|
| Type | Air purifier with long-range airflow |
| Filter | HEPA H13 + K-Carbon, fully sealed; captures NO₂ and breaks down formaldehyde (according to Dyson) |
| Airflow | Over 80 l/s, 0°/25°/50° or Breeze mode |
| Sensors | Particles, gases, formaldehyde and CO₂ |
| Height | 83 cm |
| Dimensions | 43.4 × 41.5 cm (L × W) |
| Weight | 11.9 kg |
| Control | Remote control, MyDyson app, compatible voice services |
| In the box | Purifier, HEPA H13 filter, K-Carbon filter, remote control |
| b | Luftrenare som tar bort partiklar, gaser och lukter ur rumsluften – ingen medicinteknisk produkt. |
Delivery and returns
Delivery is available to mainland Great Britain. See the Delivery page for excluded areas and the available services.
- Standard delivery (tracked), 3–5 working days – £3.99
- Express delivery, 1–2 working days – £6.99
You have a 14-day right to cancel from the day you receive your item. Contact us within 14 days if you want to cancel your order.
Read more about returns and cancellationsWarranty and complaints
Your goods are covered by the Consumer Rights Act 2015: they must be of satisfactory quality, fit for purpose and as described. If something is wrong with your item, contact our customer service and we will help you.
Contact customer service