An air duct type of central air-conditioning system uses air that is cooled or heated in a single unit (called a heat exchanger) to transfer heat to individual rooms via air ducts. A powerful centralized fan moves the air through the duct while drawing in fresh air to ventilate the rooms.   

A water chiller central air-conditioning system uses water that is cooled or heated in a single unit to transfer heat to individual rooms. While the water cycles throughout the house or office, a fan coil unit in each room exchanges heat with the water before delivering air into the room. General room temperature can be controlled by changing the speed of the fan. While the water chiller system is generally used for large applications (i.e. entire apartment buildings), smaller versions are now being used in limited smaller residential applications.

A DX multi-evaporator VRF central air-conditioning system uses refrigerant to transfer heat to individual rooms, hence, requiring multiple evaporators. Current applications of the DX multi-evaporator system apply modulation, the precise matching of cooling and heating to the demands, to sustain a stable room temperature. Copeland Digital Scroll is the latest DX multi-evaporator technology in the market.

VRF Central A/C provides you with many benefits including aesthetic buildings, greater comfort, and energy saving compared to a traditional A/C. With growing affluence and larger homes, VRF Central A/C is the obvious choice for homeowners

Superior Aesthetics With a single unit driving all your air-conditioning needs, homeowners are spared of the ugly clusters of many outdoor units, giving high quality finish to your apartments. For that premium look, VRF central A/C is the obvious choice. More Comfort Users are able to enjoy a comfortable environment with a good VRF central A/C as it is capable of maintaining a stable room temperature. Moreover, a good VRF central A/C responds quickly to reach your desired room temperature, giving you instant comfort. Saves Money A good VRF central A/C cuts down energy consumption compared to traditional A/C, which, in turn, converts to significant savings on your electricity bills.