Dyson Purifying Tower Fan (White/Silver, 310124-01)

How effective is the HEPA filter at removing allergens?

The sealed HEPA filter captures 99.97% of particles as small as 0.3 microns, including common allergens like pollen, dust mites and pet dander. The activated carbon layer also removes gases and odours. Based on Dyson's 2017 survey, 90% of allergy sufferers would recommend this purifier. The sealed system prevents pollutants from leaking back into the room, ensuring captured particles stay trapped within the filter.

What room size can this fan effectively purify?

The unit covers up to 999 square feet effectively. Dyson tested this internally in a 290 square foot room, but the 350-degree oscillation and Air Multiplier technology project airflow much further. The actual coverage depends on room layout, ceiling height and air circulation barriers. For optimal results in larger spaces, position the unit centrally with clear airflow paths around furniture and walls.

How loud is the fan during operation?

The maximum noise level is 48 decibels, which is quieter than most conversations. Night-time mode operates even more quietly with dimmed display lighting. Some users mention it's slightly louder than expected for the price point, but the noise level remains within comfortable limits for most people. The bladeless design eliminates the choppy noise associated with traditional blade fans.

How often do I need to replace the filters?

Filters typically last approximately 12 months based on 12 hours of daily use. The unit automatically monitors filter life and notifies you through the LCD display and app when replacement is needed. Actual filter life varies depending on local air quality, usage patterns and pollution levels. The notification system prevents guesswork and ensures optimal performance by alerting you before filtration efficiency decreases.

Can I use this fan without the purification function?

No, the purification and fan functions operate together as an integrated system. However, you can choose between forward airflow mode for cooling plus purification, or backward airflow mode for purification without the cooling effect. The backward mode is perfect for winter months when you want clean air without additional cooling. Both modes maintain the air purification benefits whilst giving you temperature control choices.

What air quality information does the display show?

The LCD display shows real-time levels of PM2.5 (fine particles), PM10 (allergens), VOCs (volatile organic compounds) and NO2 (nitrogen dioxide). The Dyson Link app provides more detailed historical data, trends and outdoor air quality comparisons. Colour-coded indicators make it easy to understand air quality at a glance, changing from green (good) to red (poor) based on pollution levels detected.

Does the fan work with smart home systems?

Yes, it connects to Amazon Alexa for voice control and integrates with the Dyson Link app for smartphone control. You can adjust fan speed, oscillation and modes using voice commands or the mobile app from anywhere. The app also provides scheduling functions, allowing you to set automatic operation times. However, it doesn't integrate with other smart home platforms like Google Home or Apple HomeKit.

What's the difference between forward and backward airflow modes?

Forward airflow mode projects air towards you for cooling whilst purifying, similar to a traditional fan. Backward airflow mode draws air in and projects purified air from the back of the unit, providing air cleaning without the cooling sensation. This backward mode is ideal for winter months, sleeping, or when you want air purification without feeling a breeze. Both modes maintain the same level of air purification effectiveness.