A Heating and Cooling system across the USA is often referred to as an HVAC (Heating, Ventilation, and Air conditioning) System.
HVAC is the technology of indoor environmental comfort. The main goal is to provide thermal comfort (not too hot and not too cold) and acceptable indoor air quality. HVAC is an important part of residential and commercial structures where safe and healthy indoor conditions are regulated with respect to temperature and humidity, using fresh air from outdoors.