Again, consider the amount of air pulled through the building and sent outside. An equal amount of makeup air must be introduced so as to not pull a negative pressure on the building. Duct sizing and makeup air requirements can be estimated by your contractor or chiller provider. The second alternative is to utilize a remote condenser or split system. Refrigerant is piped in and out of the building so all the heat removed is dissipated outdoors.
Installation is more involved.
It may require the service of a professional refrigeration contractor. The heat exchanger is supplied with water from an external source such as a cooling tower, city water, well water, spray ponds or other possible water source. Once the water-cooled condenser is connected with piping, it becomes less portable. However, if the cooling tower water is piped at various sources through the building, a portable chiller may be moved around to reconnect to those sources. When sizing a chiller, it is critical to understand the actual operation temperature of the fluid the chiller will supply to the process.