tuuletetuissa

Tuuletetuissa is a Finnish participial adjective form that means ventilated or provided with ventilation. It is most commonly used in technical, architectural, and indoor air quality contexts to describe a space, building, or area that has been equipped with an operating ventilation system. In everyday language, it is less frequent, but still understood in discussions about airflow and comfort.

Etymology and form: the word is derived from the verb tuulettaa, meaning to ventilate. It corresponds to the past passive participle tuulettettu, and the inessive plural form of that participle is typically rendered as tuulettetuissa. The form tuuletetuissa appears in some texts or spoken varieties as an alternative spelling, reflecting phonetic assimilation in rapid speech. In standard Finnish, tuulettetuissa tiloissa is the expected construction, but tuuletetuissa tiloissa is commonly understood as a variant.

Usage and examples: tuulettetuissa tiloissa ilmanvaihtojärjestelmä on suunniteltu toimimaan tehokkaasti. The phrase is often paired with nouns such as tilat (spaces), rakennukset (buildings), and ilmanvaihto (ventilation). It is typically used to specify the current state of ventilation or to distinguish ventilated spaces from non-ventilated ones, for example in building codes, safety guidelines, or energy-efficiency discussions.

See also: ilmanvaihto (ventilation), ilmanvaihtojärjestelmä (ventilation system), tuulettamaton (not ventilated).