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Frequently asked questions
Our Direct exclusive model comes in a new Prussian blue and gold colour. It has a K-Carbon filter that adsorbs 3x more NO₂⁴ – a common indoor pollutant. And a new integrated sensor that detects and reports CO₂ levels, notifying you when they exceed recommended limits.⁶
While our current generation purifiers circulate clean air around the whole room⁺, the Dyson Purifier Big+Quiet projects air over 32 feet, creating the circulation power purifying large spaces.⁺ Featuring our largest ever filtration system, the purifier captures 99.97% pollutants, gases, and destroys formaldehyde.¹ It’s acoustically engineered to operate quietly – even at its highest power setting.
The Dyson Purifier Big+Quiet Formaldehyde has our largest ever filtration system. We recommend replacing the H13 grade HEPA filter after using it for up to five years or sooner. The K-Carbon filter should be replaced every two years or sooner if required. The selective catalytic oxidisation filter is permanent and never needs replacing.
We've tested the Dyson Purifier Big+Quiet extensively – to ensure the sensors, filtration system and motor work together to purify a large living space. It has the projection power to purify spaces up to 32 feet.
We’ve re-engineered our purifiers to deliver three key features to purify a whole room evenly.⁺ Long range projection creates the circulation power to draw even-distant pollutants back to the purifier. An integrated sensor system accurately detects and reports pollutants. Finally, an advanced HEPA H13 grade filtration system captures gases³ and fine particles, destroying formaldehyde.¹ Purified air is then projected back into the room and the cycle repeats.
Formaldehyde is a colorless and potentially harmful gas that can be found in many household products and emitted for years. Sources of formaldehyde can include woods, glues, paints, varnishes, air fresheners, mattresses, household cleaners, and some fabrics found in household flooring and furniture.
The Dyson Purifier Big+Quiet Formaldehyde range traps formaldehyde in tunnels, breaking it down into water and CO2.⁵ This is done by a lifetime Selective Catalytic Oxidation filter which does not need replacing.
Dyson purifiers are optimal when left switched on in auto-mode. This allows the purifier to constantly monitor your air quality, and automatically sense and capture pollutants. It adjusts the airflow speed, only purifying when needed.¹¹ The Dyson Purifier Big+Quiet range offers enhanced energy efficiency, providing nearly double the clean air delivery rate per watt versus our current generation purifiers.¹²
⁺Testing for PM2.5 purification completed in a large testing chamber following relevant Dyson testing methods. Results may vary in practice.
▴The MyDysonTM app is only compatible with select Dyson products. For a list of compatible products, please click here.
¹Third party full machine testing based on GB/T 18801-2015 formaldehyde cumulative clean mass testing with continuous injection until plateau of formaldehyde CADR is achieved. Results may vary in practice.
³ Tested to JEM 1467 (acetic acid, acetaldehyde, ammonia), GB/T18801 (formaldehyde, benzene) and DMT-003282 (NO₂).
4Compared to adsorption by the standard carbon filter in Dyson Purifier Big+Quiet Formaldehyde (BP03).
⁶Levels selected based on scientific literature. Ventilation alert when CO2 levels are 1500ppm or above.