NOx refers to a group of highly reactive gases containing nitrogen oxides, including nitric oxide (NO) and nitrogen dioxide (NO2). These gases are produced during combustion processes when any type of fuel is burned, such as natural gas, oil, kerosene, wood or coal. This includes cooking with gas or oil stoves and ovens, burning firewood in wood burning stoves and log burners, vehicle exhaust fumes, wildfires or the burning of charcoal or tobacco. These activities can introduce a range of pollutants into the air.
In the context of emissions, NOx refers to nitrogen oxides released as a result of various combustion or burning processes. These emissions are a major contributor to air pollution, particularly in urban areas. Although you may feel like you can shut this pollution out of your home, modern houses are increasingly well sealed and energy efficient, which means you might be shutting pollution inside with you.
Sources of NOx include: • Gas stoves and ovens • Oil or propane stoves and ovens • Wood burning stoves and log burners • Vehicle emissions, e.g. cars, trucks, buses • Burning charcoal, e.g. barbeques • Tobacco smoke • Wildfires, lightning, volcanic activity
High levels of NOx can cause respiratory issues, especially for individuals with conditions like asthma. Long-term exposure can lead to decreased lung function and other respiratory diseases. NOx reduction is a key focus in environmental regulations aimed at improving air quality and reducing health risks.
NOx contributes to the formation of ground-level ozone (smog) and particulate matter, which can harm human health. It can also play a role in the formation of acid rain, which can damage ecosystems, soils and bodies of water.
10Tested for filtration efficiency (EN1822), air projection (DTM801), purification coverage in a 81m3 room (TM-003711) and heating performance in a 35m3 room (DTM 961).
11In maximum setting. Tested for air projection (DTM801), purification coverage in a 81m3 room (TM-003771) and heating performance in a 35m3 room (DTM961).
12Fan not air-conditioning unit.
13Third party full machine testing based on GB/T 18801-2022 formaldehyde cumulative clean mass testing with continuous injection until plateau of formaldehyde CADR is achieved. Results may vary in practice.
14Tested to Dyson test method TM-003387. In a 3 cubic meter test chamber, at fan speed 10, at third-party test laboratory (Fraunhofer WKI), comparison against regular activated carbon performance.
15Tested for filtration efficiency at 0.1 microns (ISO29463).
16Tested to JEM 1467 (acetic acid, acetaldehyde, ammonia), GB/T18801 (formaldehyde, benzene) and DTM-003282 (NO2). Gas capture rates vary.
17Particle challenge by DEHS oil specified in ISO29463 within a chamber specified in ASTM F3150. Tested in Max Mode at SGS IBR US, for whole machine efficiency above 99.95%.
18App functionality may vary per market. Requires Wi-Fi and app enabled device. Standard data and messaging rates may apply. Requires iOS version 15 or above, or Android version 8 or above. Your mobile device must have Bluetooth 4.0 support. Refer to the MyDyson app for compatible voice service.
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