Released: 1/28/13. [Back to COED Friends News] Visitation Catholic Elementary School, in Elmhurst, Illinois, is actively seeking its next great Principal. Visitation is blessed with an outstanding faculty and staff of 30 professionals educating 500 students from preschool through eighth grade.
These are installed throughout a building to move air in or out of a room. Heating, ventilation and air conditioning (HVAC) is the technology of indoor and vehicular environmental comfort. Its goal is to provide thermal comfort and acceptable indoor air quality. HVAC system design is a subdiscipline of mechanical engineering, based on the principles of thermodynamics, fluid mechanics, and heat transfer.
1 The other option is called a packaged central air conditioner; the condenser, compressor and evaporator are all in a cabinet which is installed on the roof or next to the house.  HVAC is a common industry term; it stands for heating, ventilation and air conditioning.