Bengt recalled how he had launched Blueair 20 years ago with the mission to start a clean air revolution by bringing people the world's best indoor air purifiers.

"This mission remains embedded in Blueair today as we continuously work to elevate people's health and wellbeing in a world where WHO says air pollution is now the world's largest single environmental health risk, killing around 7 million people in 2012 alone," Bengt Rittri said. He noted that according to the UN organization over 80 percent of people living in urban areas that monitor air pollution are exposed to air quality levels that exceed WHO limits.

Demand for air purifiers has grown swiftly in recent years as awareness has risen about the multiple health and wellbeing risks posed by poor air quality at home and work. One landmark UK study published this year said cradle-to-grave exposure to air pollution can contribute to cancer, asthma, stroke and heart disease, diabetes, obesity, and dementia, for example.

Bengt said that Blueair will continue to operate under its existing brand name in all its markets, including Sweden, China, US, Japan, South Korea and India.

Terms of the deal were not disclosed. The transaction is subject to customary regulatory approvals. Livingstone advised Blueair in the transaction.

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