A 5 ton roof top AC unit is a type of air conditioning system that is designed to cool large commercial and industrial buildings. It is usually mounted on the roof of the building and is connected to a central air conditioning system. The unit is capable of cooling up to 5 tons of air per hour, which is enough to cool an entire building. The unit is powered by electricity and works by drawing in warm air from the outside and then cooling it before releasing it back into the building. This type of air conditioning system is highly efficient and can save a lot of energy compared to other cooling systems. It is also relatively easy to install and maintain, making it a popular choice for many businesses.