PuroAir 240 vs Dreo Air Purifier 539S

The Dreo Air Purifier 539S is more versatile than the PuroAir 240. The PuroAir is only slightly smaller, but the Dreo holds a significant advantage in performance, with a clean air delivery rate that's more than 40% higher at both its highest fan speed and at lower settings, making it a better option for larger spaces, or smaller bedrooms and nurseries where you'd want to improve air quality in a hurry. More than that, the Dreo runs more quietly at its lowest fan speed, and unlike the PuroAir, it features onboard Wi-Fi so you can operate the unit with your smartphone.