Dyson Big+Quiet Formaldehyde BP03 Review

Aptly named, the Dyson Big+Quiet Formaldehyde BP03 is a powerful yet quiet air purifier that uses three-stage HEPA filtration technology to rid your home’s air of formaldehyde, nitrogen dioxide (NO2), carbon dioxide and other harmful pollutants. Volatile organic compounds (VOCs). It does a great job of cleaning the air in the 1,076 sq ft rooms and is equipped with an oscillating fan to keep you cool. At $999.99, it’s not for the budget, but its fast purification performance, multiple sensors, long filter life, and useful smart home platform integration earn it our Editors’ Choice award for high-end air purifiers.

Design and Features: Powerful filtration, detailed data

The BP03 has a design reminiscent of the LG PuriCare 360 ​​($1,299) we reviewed in 2021, but with Dyson’s distinct flair. It consists of a large round silver-tone fan element, called a conic amplifier, that sits at an angle on top of a blue tubular base that holds a three-stage filter assembly. Dyson calls this colorway Bright Nickel/Prussian Blue, and it’s the base model in the Big+Quiet series. The company sells a more premium version, the $1,099.99 Big+Quiet Formaldehyde BP04 with a Prussian Blue/Gold colorway and a K-Carbon filter that promises three times the NO2 filtration of the regular activated carbon filter in the BP03.

Weighing 26.2 pounds and measuring 32.6 by 17.0 by 16.3 inches (HWD), the Big+Quiet isn’t as tall or heavy as the 42.3-pound PuriCare 360 ​​(42.2 by 14.8 by 14.8 inches), but it’s a solid device. However, five small casters on the bottom make it easy to move from room to room.

The fan uses cone aerodynamic technology to force two streams of air over a smooth dome and create an airflow to deliver 21 gallons of clean air per second with a 32-foot projection range. It has 10 speed settings and three oscillation options (0, 25, or 50 degrees). There is also a wind setting that changes the angle to simulate natural wind.

In the center of the fan dome is a one-inch color LCD panel that displays real-time air quality readings from the purifier’s numerous sensors. By pressing the information button on the included remote, you can cycle through PM2.5, PM10, CO2, NO2 and VOC readings.

The base includes a fully sealed 360-degree HEPA filter, a wrapped carbon filter and a catalytic oxidation filter. Filters will remove 99.97% of contaminants including bacteria, cooking odors, formaldehyde, pet dander, pollen, VOCs from aerosol cans, and other allergens.

The HEPA filter is rated to last up to five years before needing replacement, and the carbon filter has a two-year lifespan. The app will let you know when it’s time to replace one. To access the filters, simply press the release button on the fan element, remove the fan and lift the cylinder from the base. A new HEPA filter costs $169.99 and a carbon filter costs $89.99 While the cost of a HEPA filter may seem exorbitant, it’s actually more cost-effective in the long run than most other machine replacement filters. For example, the Rabbit Air A3 Air Purifier ($749.95) requires annual filter replacement and costs $115.95 for a kit, which works out to $579.75 over five years. Replacement filters for the Dreo Macro Max S ($239.99) are relatively affordable at $49.99, but you have to replace them every six months, so that’s $500 over five years.

The BP03 has built-in Wi-Fi (2.4GHz) and Bluetooth radio and can be controlled using Amazon Alexa, Google Assistant, and Siri voice commands, but it does not support Apple HomeKit or IFTTT applets. You can control it using the aforementioned seven-button magnetic remote, which attaches to the front of the purifier, and the MyDyson mobile app for iOS and Android devices.

When you open the app, you’ll see a picture of the purifier, its name, indoor air quality, indoor temperature and humidity levels, and the most prominent types of pollutants. It’s all displayed inside a house graphic that follows the same color coding as the Dyson Purifier Cool TP07 purifier: green is good, yellow is fair, orange is bad, red is very bad, dark red is extremely bad, and purple is serious.

At the top of the screen are local outdoor temperature, humidity, and air quality readings (based on your location), and at the bottom of the screen are buttons for power, auto mode, fan speed, and oscillation angle. A remote control button opens a screen with the same buttons as well as timer and night mode options. Swipe down to see historical charts for general air quality, PM2.5, PM10, HCOC (formaldehyde), VOC, NO2, temperature and humidity readings

Installation and Performance: Fast and efficient

I had the BP03 up and running in no time. Following the quick start instructions on the box, I placed the top (fan and control panel) component on the base and twisted it slightly until it locked with an audible click. I launched the purifier, downloaded the MyDyson app and created an account. I tapped Add My Machine and allowed Bluetooth to find the purifier, which it did immediately. I selected the purifier and followed the instructions to press the power button to start the pairing process and within seconds, the device was paired with the app. I tapped Continue Setup, selected my Wi-Fi SSID from the list, and entered my Wi-Fi password. After another 30 seconds or so, the purifier connected to my network and I was asked to assign it a room location and enter the date of purchase for warranty purposes. After a quick firmware update I was good to go.

The BP03 did an outstanding job of purifying the air in the test. I put it in a 110-square-foot room where it reported a PM2.5 level of 02, lit an incense stick, and turned it off ten minutes later. When the display read 200 and showed a purple code, I set the Big+Quiet to auto mode and the fan went into high gear. After three minutes, the PM2.5 level was 65 and the color code was orange, and after six minutes the PM2.5 reading had dropped to 40 and the color code was yellow. After 10 minutes had passed, the PM2.5 level was at 16 and the color code was green. PM2.5 returned to the initial level of 02 after 13 minutes. Rabbit Air A3 also took 10 minutes to return air quality to good levels, but in this same test it needed 16 minutes to completely scrub the air of detectable particles.

Alexa voice commands to turn the Big+Keyt on and off, change the fan speed, enable auto mode and change the oscillation angle worked correctly. I created an Alexa routine to turn on the purifier with the fan speed set to eight whenever a ring floodlight cam detects motion and the oscillation is set to breeze and it works every time.

As advertised, the BP03 is very quiet. Using the NIOSH Sound Level Meter iPhone app, I measured a sound level of 38dB with the fan running at low speed and 50dB at high speed. This is on par with the Rabbit Air A3, which puts it at a maximum setting of 50dB. It’s much quieter than many other purifiers we’ve tested.

Verdict: Expensive, but worth it

While the Dyson Big+Quiet Formaldehyde BP03 may seem steep at $999.99, if you need an air purifier that not only provides detailed air quality data, but also cleans large rooms quickly and quietly. Its powerful oscillating fan does a great job of cooling large spaces, and a five-year HEPA filter life helps save money on replacement parts compared to most air purifiers. Add support for Alexa, Google, and Siri voice commands, and it’s our Editors’ Choice for high-end air purifiers.