kokonaisilmanvaihdon

Kokonaisilmanvaihto refers to the total amount of air exchanged within a building or a specific space over a given period. It is a crucial concept in building ventilation and indoor air quality management. This exchange involves both the removal of stale indoor air and the introduction of fresh outdoor air. The goal of total air exchange is to maintain a healthy and comfortable indoor environment by diluting pollutants, controlling humidity, and supplying oxygen.

The rate of total air exchange is often measured in air changes per hour (ACH), which indicates how many times the entire volume of air in a space is replaced by fresh air in one hour. Higher ACH values generally signify better ventilation, assuming the incoming air is appropriately conditioned and filtered. Factors influencing the required total air exchange rate include the occupancy of the space, the activities taking place within it, and the presence of potential indoor air pollutants.

Different ventilation systems contribute to the overall air exchange. Mechanical ventilation systems use fans to actively supply fresh air and exhaust stale air, allowing for precise control over the total air exchange. Natural ventilation relies on the movement of air through openings like windows and doors, driven by wind and temperature differences. Hybrid systems combine both mechanical and natural methods. Understanding kokonaisilmanvaihto is essential for designing and operating buildings that provide good indoor air quality and occupant well-being.