Dyson Purifier Big+Quiet Formaldehyde BP04 vs Blueair Blue Signature Large

The Dyson Purifier Big+Quiet Formaldehyde BP04 and Blueair Blue Signature Large are both premium air purifiers intended for larger spaces, but the Blueair delivers better performance across the board. At both units' highest fan speeds, the Blueair is more than twice as fast when it comes to providing the same level of air quality within a similarly sized room. While the Blueair has a slightly wider footprint, it's also considerably shorter, and its flat top allows it to double as a functional end table. Unfortunately, the Blueair's ionizer system can't be disabled. Since this feature releases ozone as an operating byproduct, this can be an issue for those who suffer from ozone sensitivity.