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.
Types of HVAC Filters. The filter of an HVAC system is one of the most critical parts of the system. The filter increases the life and efficiency of HVAC systems by protecting them from dust, dirt and other contaminants. Many different filters are on the market, and each type of HVAC system will use a different filter.