Mann+Hummel OurAir purifier, sensor and pocket filters on display

Photo: Mariusz Młynarczyk / CloudAir.tech

A white air purifier, an air quality monitor and a glass case of coloured pocket filters stand on a green-edged counter at the Mann+Hummel stand. Wall graphics explain qlair and "OurAir" with the line "Smarter choices, better air - three steps to better indoor air", while visitors talk at a counter beside a green panel wall.