**8. Conclusions**

near the floor-wall intersection, as shown in **Figure 13**. Every single zone will contain one

It consists of a vapor compression refrigeration cycle; heat source such as heat pump and electric resistance; an air handler such as dampers, filter, and fan; and control devices, as shown in **Figure 14**. This system may be connected to ductwork and serve a large-size single

The split systems contain two central devices [5, 6]: the condenser, located outdoor, and the evaporator, located indoors. The two devices are connected by a conduit for refrigerant lines and wiring. This system solves some issues of small-scale single-zone systems since the location and installation of window, unitary or rooftop air conditioners may affect the esthetic value and architectural design of the building. The split systems can contain one condenser unit and connected to multiple evaporator units to serve multiple zones as possible under

unitary air-conditioner as in each guest room in many hotels.

zone that cannot be served by unitary or window air conditioners.

same conditions or different environmental conditions.

*7.4.3. A packaged rooftop air-conditioner*

**Figure 13.** Unitary air-conditioner package.

**7.5. Split systems**

64 HVAC System

This chapter presents the types of HVAC systems. HVAC systems have several requirements including primary equipment such as heating equipment, cooling equipment, and delivery equipment; space requirement such as HVAC facilities, equipment room, and vertical shaft; air distribution; and piping. Type of HVAC systems can be divided into central HVAC systems and local HVAC systems. This classification depends on zone types and the location of HVAC equipment. The central HVAC systems can serve multiple and single zones and locate away from the building, which needs distribution devices. They also can be sub-classified into all-air HVAC systems, air-water systems, all-water systems, water-source heat pumps, and heating and cooling panel systems. The local HVAC systems are mostly placed inside or adjacent to the living spaces and serve one single zone. They consist of local heating systems, local air-conditioning systems, local ventilation systems, and split systems.
