One of the main advantages of open air-cooled systems is that they are typically less expensive to operate and maintain than traditional cooling systems. They also don't require the energy consumption of air conditioning systems. They also do not require the use of refrigerants, which can be harmful to the environment if they are not handled properly.

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However, open air-cooled systems have some limitations. The efficiency of the cooling system is dependent on the temperature and humidity of the ambient air. During hot weather or high humidity, the system may not be able to dissipate enough heat to keep the servers cool. Some companies need a backup cooling systems for those times. Additionally, the servers and other equipment in the data center may need to be designed to operate at higher temperatures to be compatible with an open air-cooled system.

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Open air-cooled systems can be used in combination with other cooling methods, for example, using a hybrid cooling system that uses both air conditioning and open air-cooling, or using a cooling tower, which uses evaporation to dissipate heat.

It's important to consider the local climate, the size and the type of data center before deciding if an open air-cooled system will work best. These systems are not recommended for all locations or types of data centers and should be evaluated on a case-by-case basis.