How HVAC Works...

Heating, Ventilation, and Air Conditioning or better known as HVAC is a system that provides comfort cooling and heating to an enclosed space.
It controls the indoor temperature, humidity, and purity of air that is sent to different rooms of a building. HVAC replenishes indoor air with fresh oxygen and removes excessive moisture at the rooms. It eliminates air contaminants such as unpleasant smell, smoke, heat, dust, airborne bacteria, carbon dioxide, and unwanted gases. HVAC provides ventilation to replace the air from the rooms, maintains air circulation, and prevents stagnation of air inside the rooms.
The main purpose of HVAC system is to maintain good indoor air quality inside the rooms of a building through adequate air filtration and ventilation in order to provide thermal comfort.