Air conditioning units are becoming more and more frequent in about all types of buildings. Central air conditioning units are basically designed for the homes and also for the buildings. You can see that the big buildings and large infrastructures usually have central air conditioning units. A central air conditioning unit normally uses a split system for its condenser and compressor. The evaporator of the central air conditioning unit is attached to an air handling apparatus or a forced air furnace. The whole system of the central air conditioning unit is housed in a packaged unit that is most often positioned outdoors, such as a rooftop or an outhouse. Cooled air produced or created by the unit is distributed to different floors and rooms, through air ducts, in the whole building or home. An occupant may raise or lower the temperature of the central air conditioning unit through controls that are located in each room of the building.

There are some buildings that do not have such temperature controls. The tenants of the building will have to control and deal with the common temperature set for all floors of the building. Central air conditioning units have a lot of advantages in their use. The unit of the centralized air conditioning unit is located outdoors and the occupants of the building are not bothered with the noise that is usually generated by the running air conditioning unit. The filtering system of the central air conditioning units is more sophisticated than the others. The filters clean the air that is circulated in the whole building. Central air conditioning units are perfect for the big buildings, big homes and large infrastructures.