CENTRAL PLANT OF HVAC PROJECT

CENTRAL PLANT OF HVAC PROJECT

The objective of an HVAC system is to ensure that an indoor environment is both safe and comfortable for humans.  Safety here mainly concerns the Indoor Air Quality or IAQ, meaning that the indoor air should have enough oxygen and be free of noxious gases.  Comfort of course is based on human perception, which can vary within bounds.  ASHRAE (the American Society of Heating, Refridgeration, and Air-conditioning Engineers), defines comfortable air quality as one “with which a substantial majority (80% or more) of the people exposed do not express dissatisfaction.”