#clean air
- Air filter — A technical device or industrial installation designed to retain impurities, dust, pollen, or other suspended particles in the air, ensuring the purification of the gas stream before it enters a room or an internal combustion engine. In ecology, the term also applies to biological systems for natural atmospheric filtration.
- Air ionization — A natural or artificial process through which gas molecules within the air composition are transformed into air ions (electrically charged); in medicine and balneology, it represents the therapeutic use of air controlledly enriched with ions (especially negative ones) to relieve respiratory, cardiovascular, or stress conditions.
- Air ionizer — An electrical appliance or electronic device designed to produce air ions and enrich the atmosphere of a room with electrically charged particles (especially negative ions). This device typically operates based on high-voltage electrical discharges (Corona effect) or ionic dispersion, serving to purify the air by precipitating dust, pollen, and smoke, and is also used for therapeutic purposes.