<h1>Air purifiers: petition seeks reclassification as medical devices and GST reduction to make them affordable.</h1> The petition seeks directions to classify air purifiers as medical devices and reduce GST from 18 percent to 5 percent on the ground that they are essential during severe air pollution. The Centre contends that any change to GST rates must proceed through the GST Council, which requires physical voting and participation of states and the Union finance minister, and asks for time to file a detailed counter affidavit and to have the petition treated as a representation to the Council.