A cleanroom is a controlled environment designed to minimize contamination from particles, dust, and microorganisms. These specialized spaces are often used in industries like pharmaceuticals, electronics, and biotechnology, where even tiny impurities can affect product quality. Cleanrooms maintain strict air quality standards, temperature, and humidity levels to ensure optimal conditions for sensitive processes. To achieve cleanliness, cleanrooms use high-efficiency particulate air (HEPA) filters and maintain a constant flow of filtered air. Personnel working in cleanrooms must wear protective clothing, such as gowns and masks, to prevent contamination. The cleanliness of a cleanroom is classified by the number of particles allowed per cubic meter of air, following standards set by organizations like the ISO.