Dyson PH3A Purifier Humidify+Cool Autoreact (Black)

What room sizes can this unit effectively treat?

The Dyson PH3A is designed for spaces up to 40 square metres. This makes it suitable for most living rooms, bedrooms, home offices and open-plan kitchen areas. The powerful airflow ensures even air distribution throughout the coverage area. For larger spaces, you may need multiple units or a higher-capacity model.

How often do I need to refill the water tank?

The 4.55-litre water capacity typically lasts 2-4 days depending on humidity settings and room conditions. During dry winter months or in arid climates, you may need to refill more frequently. The app provides water level notifications so you'll know exactly when refilling is needed. The tank features easy-access design for quick refilling.

Can I control this device when I'm not at home?

Yes, the dedicated smartphone app allows complete remote control from anywhere with internet connection. You can adjust settings, schedule operations, monitor air quality and receive notifications about filter status or water levels. This remote functionality lets you prepare your home environment before arriving or make adjustments whilst away.

What types of pollutants does the HEPA filter remove?

The HEPA filtration system captures 99.97% of particles as small as 0.3 microns including dust, pollen, pet dander, smoke particles and some bacteria. It also removes common household odours and volatile organic compounds. The multi-stage filtration process includes a pre-filter for larger particles and an activated carbon layer for gases and odours.

Does this unit require professional installation or assembly?

No assembly is required - the device is ready to use straight from the box. Simply remove from packaging, fill the water tank, plug into a standard electrical outlet and download the app. The setup process takes just a few minutes and includes guided instructions through the mobile application for initial configuration.

How much electricity does this device consume?

Power consumption varies based on operating mode and settings but typically ranges from 40-200 watts. The intelligent auto mode optimises energy usage by adjusting power based on real-time air quality readings. Sleep mode reduces consumption further whilst maintaining air treatment. The corded electric design ensures consistent performance without battery concerns.

What maintenance is required to keep this unit running properly?

Regular maintenance includes cleaning the water tank weekly, replacing the water filter monthly and cleaning the main HEPA filter every 3-6 months depending on usage. The included cleaning brush helps maintain the filters. The app tracks filter life and sends replacement reminders. Most maintenance tasks take just a few minutes.

Can this device operate quietly during nighttime use?

Yes, the unit includes sleep mode specifically designed for nighttime operation with reduced noise levels. The intelligent sensors continue monitoring air quality whilst minimising sound output. Even in normal operation, the device runs quietly enough for bedroom use. The app allows you to schedule automatic switching to sleep mode at bedtime.