Dry, dirty air
We spend up to 90% of our time behind closed doors,³ with modern air conditioning and heating that are increasingly exposing us to dry air. When the air is too dry or too humid, bacteria and viruses can thrive.⁴ Humidifiers are well-established solutions for dry air.
However, where there is standing water, there is often the opportunity for bacteria to multiply. If water is not properly treated to kill bacteria, the dirty water may be expelled into the room, mixing with indoor air pollution caused by everyday household items such as gas stoves, beauty products, cleaning supplies or pets. Air pollution is often made up of particles and volatile organic compounds (VOCs). One of the most common VOCs is formaldehyde which can be emitted from items like pressed wood products, cleaning agents, carpets, permanent press fabrics, cigarettes, paints and varnishes.
UV-C light kills bacteria in water by denaturing their DNA so they can no longer multiply. This process relies on thorough exposure to UV-C light. In the design of the Dyson Pure Humidify+Cool™, engineers conducted significant research to explore optimum exposure of bacteria to UV-C light in order for it to be denatured. They developed a highly reflective PTFE tube through which UV-C light is reflected. As water is pumped up from the water tank and passes through these multiple rays, the UV-C kills 99.9% of bacteria in the water in the first pass2.
Once treated, the water fills the collars of the 3D Air-mesh evaporator. Silver strands are interwoven into the top and bottom faces of the Air-mesh material to create its unique structure and provide biostatic properties. This inhibits bacteria growth on the evaporator. Silver has been used for over two centuries in surgery and childbirth, as well as in burn treatment and water disinfection.⁵ Inside the evaporator, purified airflow is hygienically humidified by the water vapor released from the evaporator and projected through the Air Amplifier into the room.