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
Factors influencing the required õhuvahetusmäär include the occupancy of the space, the activities taking place within