Standards to help clean up chaotic market for air purifiers

A new national standard for air purifiers will help guide the booming market for the devices, which currently lacks supervision, experts said.

Sales of air purifiers increased when Beijing issued smog alerts recently.

"Some best-sellers have already run out of stock. Even though sales decreased a little compared to the beginning of this month, when the first alert was issued, I think it might be because people already have one," said Luo Zhongchao, a sales assistant at electronic appliance vendor Gome.