Windmill Air Purifier vs Blueair Blue Signature Small

The Blueair Blue Signature Small is a better overall performer than the Windmill Air Purifier. It delivers stronger particle filtration, covers slightly larger areas, operates more quietly, and has a smaller footprint, giving you greater cleaning performance without taking up as much space. The Windmill still holds a few usability advantages, including dedicated Whisper and White Noise sleep modes and a display that can be turned off completely. It also avoids ionization entirely, whereas the Blueair's HEPASilent system relies on ionization that can't be disabled, which may matter if you'd rather steer clear of that technology because of ozone sensitivity.