For large buildings and gyms, a central air conditioning system is the most suitable option. This type of system is designed to cool multiple rooms or areas at once, and can be used to regulate the temperature of large spaces. It works by circulating cooled air through a network of ducts, which are connected to a central air handler. This air handler is typically located in a basement or attic, and is connected to an outdoor condenser unit. Central air conditioning systems are highly efficient and cost-effective, making them an ideal choice for large buildings and gyms.