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Even the best air cleaners could be a frivolous investment, according to medical experts. Our tests also show that a few produce significant levels of ozone, an irritant that can worsen asthma and decrease lung function.
Market leader Sharper Image's Professional Series Ionic Breeze Quadra SI737 is among the ionizing room models that did a poor job of cleaning dust and smoke from the air in our May report. All ionizing models produce some ozone, but those poor performers emitted enough of it to fail the industry-standard Underwriters Laboratories test that we replicated.
For this report, we expanded our aircleaning and ozone tests to include room as ...