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The Air 4000 air purifier from Bosch cleans the air in rooms up to 62.5 m2. Its 3-in-1 filter removes more than 99% of pollutants including dust, pollen, bacteria, viruses, and dander while also eliminating odours, for clean and healthy air throughout the home.

In quiet mode, the noise level is reduced and the lights on the display are switched off.

What is Quiet Mark?

Quiet Mark is the international certification programme associated with the UK Noise Abatement Society charitable foundation (est. 1959). Conducting expert acoustic testing and verification of products Quiet Mark has over the past 13 years driven change in manufacturing worldwide to prioritise noise reduction within the design of everyday machines, appliances, technologies and house build materials, creating the first one-stop platform for third-party approved noise reduction solutions for every living space to health and well-being.

Through specialist acoustic measurement and product assessment, Quiet Mark identifies the quietest products in over 80 product categories giving consumers, trade buyers, architects and specifiers a more informed choice about the sound levels of the products they buy to empower responsible product sourcing. The Quiet Mark scheme drives designers and manufacturers to reduce sound levels of their products enabling households and workplaces to rebalance the soundscape reducing stressful unwanted noise.

Why Quiet Mark?

"I couldn't hear my baby crying over the noise of the hairdryer"

The damaging effect of excessive noise on health, productivity and social cohesion is seriously underestimated. World Health Organisation research shows that environmental noise pollution affects mental and physical health and is now second only to air pollution as the world’s largest killer pollutant. Across an estimated population of 340 million people, at least 1 million years of healthy living are lost each year due to noise pollution in Western Europe.

In our fast-paced lives, vibrancy is exciting and necessary. But this heightened state can only be valued if there is also the opportunity to choose the alternatives of calm, quiet and the chance to switch off. Quiet Mark was established to provide a credible, independent public health product symbol and directory to help consumers and industry easily identify quietest products for the home, at work and for public spaces.

For more details - www.quietmark.com