Ventilation is the process of moving fresh air in and out of a space to keep it clean and healthy. It helps to remove stale air, prevent the buildup of moisture and unpleasant odors, and maintain a comfortable temperature. Full definition
All that's missing is a front - seat ventilation system for hot days. (jdpower.com)
The ball is made of plastic and there are enough holes for ventilation for them to breathe normally. (amazon.co.uk)
However, voluntary standards are available that guide the installation of ventilation systems when new schools are constructed, she adds. (educationworld.com)