Is a chiller considered HVAC?

Yes, a chiller is considered part of HVAC. A chiller is a type of air conditioning system that cools air by passing it over a refrigerant-filled coil. The refrigerant absorbs heat from the air, which is then released outside. Chillers are typically used in large commercial and industrial buildings, such as office buildings, hospitals, and factories. They are also used in some residential applications, such as in homes with multiple air conditioning units.