Key featuresQuietly purifies even at full power.Acoustically engineered to produce less noise. Night mode is 50% quieter than any other Dyson purifier15. With a Sleep timer so you can set it and forget it.Powerful projection to cool you downDelivers over 80 litres of purified air per second. Adjust the angle of airflow between 0°, 25° or 50°, or mimic the feeling of refreshing air indoors using Breeze mode.Long-lasting filterThe HEPA H13-grade filter lasts up to 5 years. Remove and replace in one click.Climate Voucher ApprovedAs a DC powered fan with purification, the Dyson Purifier Big+Quiet Formaldehyde is eligible for the Singapore Climate Voucher. Use in store today.Always sensingIn Auto mode, your purifier reacts automatically to remove pollutants, only using energy when needed.Easy to manoeuvreDiscreet, hidden wheels designed for hard surfaces let you easily move your machine around the room.