A 3 ton rooftop AC unit is a type of air conditioning system that is designed to cool large buildings and commercial spaces. It is typically mounted on the roof of the building and is powered by electricity. The unit consists of an outdoor condenser, an indoor evaporator, and a compressor. The condenser works to draw in hot air from the outside and cool it down, while the evaporator works to blow cool air into the building. The compressor then circulates the air throughout the building, ensuring a comfortable temperature. The 3 ton rating of the unit refers to the amount of cooling capacity it can provide, which is typically measured in British Thermal Units (BTUs). A 3 ton unit is capable of cooling an area of up to 3000 square feet. It is important to note that a 3 ton unit is not suitable for all applications, as it may be too powerful for some buildings and not powerful enough for others. Therefore, it is important to consult with a professional to determine the best size and type of AC unit for your particular space.