The energy and thermal comfort performance of a dew point cooler installed at a school in South Australia have been evaluated and analysed. The study is based on data recorded at the site and empirical data supplied by the manufacturer. The evaluation, initially based on a limited dataset, was extended using a TRNSYS model to assess system performance on daily, monthly, and annual scales. The performance indicators evaluated include the input power and energy and water consumption of the cooler. The cooler’s energy performance was also compared with a ducted split inverter refrigerative system commonly installed in school buildings. In the absence of recorded data for the refrigerative system, the thermal comfort performance of the unit was compared against the ASHRAE thermal comfort conditions. In terms of indoor air quality, the dew point cooler delivers 100% fresh air to conditioned spaces. This contrasts with split refrigerative systems which do not introduce any fresh air into the cooling coil and therefore necessitate the installation of a ventilation unit to provide fresh air in the conditioned spaces. This paper summarises and discusses the outcomes of the system’s performance evaluation.