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BMS Controls Glossary

New Roof Ac Unit

What is the definition of a new roof AC unit? A roof AC unit is an air conditioning system that is placed on top of a building’s roof instead of inside the structure. This type of system is often used when a central air conditioning system is not feasible due to space or design constraints. The main advantages of a roof AC unit are that it is easier to install, since it does not require ductwork, and can be placed in areas of the building that are difficult to access. It also does not require any additional ventilation, making it more energy efficient than a traditional system. A typical roof AC unit consists of an evaporator, a condenser, and a fan, all connected to the main power source. The evaporator is responsible for cooling down the air and removing humidity from the atmosphere, while the condenser is responsible for releasing the heat absorbed by the evaporator into the atmosphere. The fan helps circulate the air through the unit. The efficiency of a roof AC unit can vary depending