Here is a smart air purifier that you can control with Alexa, Siri and Google Home. The VOCOlinc Apple HomeKit HEPA Air Purifier has a removal efficiency of 99.97%. It has a 3-stage filtration system and can cover spaces up to 645 sq.ft. It has a 5.1″ LED display to show you temperature, humidity, and air quality.
The device has a LED bar that gives you quick feedback on the quality of your air. It has a noise level of 30 to 55dB.