õhuvahetusmäär

õhuvahetusmäär, also known as air change rate or air exchange rate, is a measure of how much fresh air is introduced into a space and how much stale air is removed. It is typically expressed in air changes per hour (ACH), which represents the number of times the total volume of air in a room or building is replaced with fresh air in one hour.

The õhuvahetusmäär is an important factor in maintaining indoor air quality. Adequate ventilation helps to dilute and remove pollutants such as carbon dioxide, volatile organic compounds (VOCs), and moisture, which can negatively impact occupant health and comfort. A low õhuvahetusmäär can lead to poor air quality, while an excessively high rate can result in unnecessary energy consumption for heating and cooling.

Factors influencing the required õhuvahetusmäär include the occupancy of the space, the activities taking place within it, and the presence of specific pollutant sources. Building codes and standards often specify minimum ventilation rates for different types of buildings and spaces to ensure acceptable indoor air quality. Natural ventilation, such as opening windows, and mechanical ventilation systems, like exhaust fans and air handling units, are common methods used to achieve the desired õhuvahetusmäär. Monitoring and controlling the õhuvahetusmäär are crucial for creating healthy and energy-efficient indoor environments.