ilmanvaihtokierroksia

Ilmanvaihtokierroksia refers to the number of times the air in a building is completely replaced with fresh air within a specific time period, usually an hour. This metric is a key indicator of a ventilation system's effectiveness in maintaining indoor air quality. A higher number of ilmanvaihtokierroksia generally means more fresh air is being supplied, which helps to dilute indoor pollutants such as carbon dioxide, volatile organic compounds, and moisture.

The required rate of air changes per hour varies depending on the building's use and occupancy. For example, residential buildings typically have lower air change requirements than public spaces like schools, hospitals, or gyms, where the number of occupants and the intensity of activities can lead to faster buildup of indoor contaminants. Building codes and standards often specify minimum air change rates to ensure adequate ventilation and occupant health and comfort.

Factors influencing ilmanvaihtokierroksia include the design of the ventilation system, such as the capacity of fans and the sizing of ducts, as well as operational settings. Natural ventilation, relying on wind and temperature differences, can also contribute to air changes, though it is generally less predictable than mechanical ventilation. Monitoring and maintaining appropriate ilmanvaihtokierroksia are crucial for energy efficiency, as excessive ventilation can lead to unnecessary heating or cooling of outdoor air, while insufficient ventilation can compromise indoor air quality and occupant well-being.