Which abbreviation stands for heating, ventilating and air conditioning?

• A. HVAC
• B. IAQ
• C. OA
• D. PM

Answer: (A)

Heating, ventilation, and air conditioning are the three main functions of climate control in buildings, together described by the acronym HVAC. This term denotes the integrated system that provides warmth in cold weather, brings in outdoor air and removes stale air for ventilation, and conditions air through cooling or dehumidification when needed. The other terms refer to related ideas but not the system itself: IAQ stands for Indoor Air Quality, focusing on the air quality inside a space; OA stands for Outside Air, the input air for ventilation; PM stands for Particulate Matter, a type of air pollutant. So, the abbreviation for heating, ventilating and air conditioning is HVAC.