HVAC You many not be familiar with the initials HVAC together but they stand for heating, ventilating, and air conditioning. Many people also simply use the term climate control instead of HVAC. This is because the entire concept embraces what it takes to keep people comfortable in their climate. Since that will change based on external factors it is important for all of the elements to work properly. Whether you are running your heater or your air conditioner, ventilation is a very important part of the process to look into. HVAC is something that has to be designed in homes and in businesses. Many of the concepts continue to be improved upon in order to ensure that everyone is comfortable. Older homes often have people in them complaining that they are warm in one room of it but freezing in another.