The California Air Resources Board on Thursday banned popular in-home ozone air purifiers, saying studies have found that they can worsen conditions such as asthma that marketers claim they help to ...

Here's how to create your own personal Stage 2 Smog Alert: Buy a personal air purifier that emits high levels of ozone. Subscribe to read this story ad-free Get unlimited access to ad-free articles ...

In a small, poorly ventilated room, an indoor air purifier that produces even a few milligrams of ozone per hour can create an ozone level that exceeds public health standards, researchers at UC ...

Dear Jim: We like to use our swimming pool and spa, but we want to use fewer harsh chemicals to protect our skin and the environment. Are ozone water purifiers effective, and do they consume much ...

Indoor air purifiers that produce even small quantities of ozone may actually make the air dirtier when used at the same time as household cleaning products, scientists at UC Irvine have discovered.

Question: Swimming pool chemicals are expensive and irritate my eyes and skin. How effective are activated oxygen purifiers for pools and spas so I can use less chlorine. Do they cost much to operate?

My daughter has asthma. Would she benefit from an ozone air purifier in her room? Answers from James T C Li, M.D., Ph.D. Despite manufacturers' claims, ozone air purifiers don't remove asthma triggers ...

Every product we recommend is chosen through a combination of Primary Research and Secondary Research. Most people buy air purifiers to breathe cleaner air, but not everyone realises that some models ...

Question: I am considering using an "activated oxygen" purifier instead of chlorine for my swimming pool and spa. Chemicals are expensive and irritate my eyes. How much electricity does a purifier use ...