Levegcsereszám

Levegcsereszám, meaning "air exchange rate" in Hungarian, refers to the number of times the entire volume of air within a building or a specific room is replaced by fresh outside air in one hour. This metric is crucial for assessing indoor air quality and energy efficiency. A higher levegcsereszám generally indicates better ventilation, leading to a reduction in pollutants, moisture, and odors. However, excessively high rates can result in significant heat loss during colder months and heat gain during warmer months, increasing energy consumption for heating and cooling systems.

The levegcsereszám is influenced by various factors, including the building's airtightness, the presence and type of mechanical ventilation systems such as fans or heat recovery ventilators, and natural ventilation through opening windows and doors. Building codes and standards often specify minimum acceptable levegcsereszám values for different types of buildings to ensure occupant health and comfort. For instance, residential buildings typically require a lower levegcsereszám than commercial or industrial spaces. Measuring the levegcsereszám can be done using specialized equipment like tracer gas analyzers or by calculating it based on ventilation flow rates and room volume. Proper management of the levegcsereszám is a key aspect of sustainable building design and operation.