puhdastila

Puhdastila is the Finnish term for a cleanroom, a controlled environment designed to limit the introduction, generation, and retention of airborne particles, microorganisms, and other contaminants. Such spaces are essential in industries where product quality and safety depend on air quality and surface cleanliness, including pharmaceuticals, biotechnology, electronics manufacturing, medical devices, and clinical laboratories. Cleanrooms are designed around strict environmental controls and are typically classified according to international standards, most commonly ISO 14644-1. Validation and ongoing monitoring per ISO 14644-2 and related guidelines are used to demonstrate that a space meets its cleanliness specification.

Construction and operation in a puhddastila rely on specialized HVAC systems with high-efficiency filtration, such as HEPA or ULPA filters, and tightly controlled temperature and humidity. Depending on the application, cleanrooms may use positive or negative air pressure relative to surrounding spaces. Surfaces are smooth and easy to clean to minimize particle generation. Access is restricted, gowning procedures are enforced, and movement within the space is regulated to reduce contamination. Regular cleaning, particle counting, microbial monitoring, and environmental auditing are part of routine maintenance.

Classification and use: Cleanrooms are designated by cleanliness levels that specify permissible particle concentrations for defined particle sizes. In regulated sectors, puhddastila design and operation must comply with applicable standards and regulatory requirements, including GMP or equivalent frameworks in pharmaceuticals and healthcare contexts. In Finland, these facilities are maintained to align with international best practices and EU regulations.