Air-conditioning systems
Air Conditioning Installations
Air conditioning installation in the retrofit of educational facilities is dependent on many elements including use of space, size of facility and climate. In this section several Air Conditioning installation options will be discussed each has it specific use and advantages and disadvantages. These are: Split DX Installation, Packaged Rooftop Installation, Displacement Ventilation, Ductless Split, Hydronic Distribution, and Variable Air Ventilation (VAV) Reheat System.

A Split DX installation normally is for a single room. These units known as a split unit can be two separate units – Air Handler and evaporator coil inside and the compressor and condenser outside. A package rooftop unit is fully self-contained and most consist of a constant volume supply fan, DX cooling coil, heating strips if required, filters, compressors, condenser coils and fans. Used normally for a single zone. Displacement ventilation is one that is different from most used in educational facilitiesThe goal of displacement ventilation or cooling is to not cool the space but to cool the occupants. Hydronic distribution system describes the transfer of heat by circulating a fluid (as water or vapour) in a closed system of pipes to cool a space. VAV is a general term for a type of HVAC system supplying on the amount of air needed to satisfy the load requirements of a building zone or room, and can supply different volumes to different zones at the same time