What does HVAC stand for?

HVAC stands for Heating, Ventilation, and Air Conditioning. This term encompasses the various technologies and systems used to regulate indoor environments by controlling temperature, humidity, and air quality.

Heating refers to the systems that provide warmth to the air during colder weather. Ventilation is the process of exchanging or replacing air in a space to provide high indoor air quality, which includes removing moisture, odors, smoke, heat, dust, airborne bacteria, and carbon dioxide. Air conditioning relates to cooling and dehumidifying the air in a building. Together, these components create a comprehensive system design for maintaining comfort and safety within indoor spaces.

The other options fail to accurately represent the full scope of what HVAC entails. Some use terminology that is either outdated or not accurately reflective of the field's standards, while others omit essential functions of the systems involved in HVAC.